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# Configuration parameters: Zabbix proxy

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### Overview

Configuration parameters allow customizing Zabbix proxy behavior.

Specify parameter values in the configuration file (`zabbix_proxy.conf`). All parameters are **optional**, unless explicitly stated that the parameter is mandatory.

This page is structured as:

-   Parameter overview (to see full details of a parameter, click on its name)
-   [Parameter details](#parameter-details)

|Parameter|Description|
|--|--------|
|[AllowRoot](#allowroot)|Allow proxy to run as `root`.|
|[AllowUnsupportedDBVersions](#allowunsupporteddbversions)|Allow proxy to work with unsupported database versions.|
|[CacheSize](#cachesize)|Set the configuration cache size.|
|[ConfigFrequency](#configfrequency)|This parameter is **deprecated** (use ProxyConfigFrequency instead).<br>Set the frequency of retrieving configuration data from Zabbix server.|
|[DataSenderFrequency](#datasenderfrequency)|Set the frequency of sending collected data to Zabbix server.|
|[DBHost](#dbhost)|Specify the database host (or socket directory).|
|[DBName](#dbname)|Specify the database name or path to the database file for SQLite3.|
|[DBPassword](#dbpassword)|Specify the database password.|
|[DBPort](#dbport)|Specify the port of the Zabbix database host.|
|[DBSchema](#dbschema)|Specify the database schema name. Used for PostgreSQL.|
|[DBSocket](#dbsocket)|Specify path to the MySQL socket file.|
|[DBUser](#dbuser)|Specify the database user.|
|[DBTLSConnect](#dbtlsconnect)|Specify a value to enforce a TLS connection to the database.|
|[DBTLSCAFile](#dbtlscafile)|Specify full pathname of the file containing the top-level CA(s) certificates for database certificate verification.|
|[DBTLSCertFile](#dbtlscertfile)|Specify full pathname of the file containing the Zabbix proxy certificate for authenticating to database.|
|[DBTLSKeyFile](#dbtlskeyfile)|Specify full pathname of the file containing the private key for authenticating to database.|
|[DBTLSCipher](#dbtlscipher)|Specify the list of encryption ciphers that Zabbix proxy permits for TLS protocols up through TLS v1.2. Supported only for MySQL.|
|[DBTLSCipher13](#dbtlscipher13)|Specify the list of encryption ciphersuites that Zabbix proxy permits for the TLS v1.3 protocol. Supported only for MySQL, starting from version 8.0.16.|
|[DebugLevel](#debuglevel)|Set the debug level.|
|[EnableRemoteCommands](#enableremotecommands)|Allow remote commands from Zabbix server.|
|[ExternalScripts](#externalscripts)|Specify the external script location.|
|[Fping6Location](#fping6location)|Specify the fping6 location.|
|[FpingLocation](#fpinglocation)|Specify the fping location.|
|[HistoryCacheSize](#historycachesize)|Set the history cache size.|
|[HistoryIndexCacheSize](#historyindexcachesize)|Set the history index cache size.|
|[Hostname](#hostname)|Specify the proxy name.|
|[HostnameItem](#hostnameitem)|Specify the item used for setting Hostname (if undefined).|
|[HousekeepingFrequency](#housekeepingfrequency)|Set the housekeeping procedure frequency (in hours).|
|[Include](#include)|Specify a directory or individual files to be included in the configuration file.|
|[JavaGateway](#javagateway)|Specify the Zabbix Java gateway IP address (or hostname).|
|[JavaGatewayPort](#javagatewayport)|Specify the Zabbix Java gateway port.|
|[ListenBacklog](#listenbacklog)|Set the maximum number of pending connections in the TCP queue.|
|[ListenIP](#listenip)|Specify the trapper listen IP address.|
|[ListenPort](#listenport)|Specify the trapper listen port.|
|[LoadModule](#loadmodule)|Specify the module to load at proxy startup.|
|[LoadModulePath](#loadmodulepath)|Specify full path to the location of proxy modules.|
|[LogFile](#logfile)|Specify the proxy log file.|
|[LogFileSize](#logfilesize)|Set the maximum log file size.|
|[LogRemoteCommands](#logremotecommands)|Enable logging of executed shell commands as warnings.|
|[LogSlowQueries](#logslowqueries)|Set the maximum duration a database query may take before being logged (in milliseconds).|
|[LogType](#logtype)|Specify the log output type.|
|[MaxConcurrentChecksPerPoller](#maxconcurrentchecksperpoller)|Set the maximum number of asynchronous checks that can be executed at once by each HTTP agent poller, agent poller, or SNMP poller.|
|[PidFile](#pidfile)|Specify the PID file.|
|[ProxyBufferMode](#proxybuffermode)|Specify the storage mechanism for history, discovery, and autoregistration data (disk/memory/hybrid).|
|[ProxyConfigFrequency](#proxyconfigfrequency)|Set the frequency of retrieving configuration data from Zabbix server in seconds.|
|[ProxyLocalBuffer](#proxylocalbuffer)|Set the duration of keeping data locally (in hours), even if the data have already been synced with the server.|
|[ProxyMemoryBufferAge](#proxymemorybufferage)|Set the maximum age of data in the proxy memory buffer in seconds.|
|[ProxyMemoryBufferSize](#proxymemorybuffersize)|Set the shared memory cache size for collected history, discovery, and auto registration data.|
|[ProxyMode](#proxymode)|Set the proxy operating mode (active/passive).|
|[ProxyOfflineBuffer](#proxyofflinebuffer)|Set the duration of keeping data (in hours) in case of no connectivity with Zabbix server.|
|[Server](#server)|If ProxyMode is set to `active`: specify Zabbix server IP address or DNS name (address:port) or cluster (address:port;address2:port) to get configuration data from and send data to.<br>If ProxyMode is set to `passive`: specify IP addresses or DNS names of Zabbix server.|
|[SNMPTrapperFile](#snmptrapperfile)|Specify the temporary file used for passing data from the SNMP trap daemon to the proxy.|
|[SocketDir](#socketdir)|Specify the directory for storing IPC sockets used by internal Zabbix services.|
|[SourceIP](#sourceip)|Specify the source IP address.|
|[SSHKeyLocation](#sshkeylocation)|Specify the location of public and private keys for SSH checks and actions.|
|[SSLCertLocation](#sslcertlocation)|Specify the location of SSL-client certificate files for client authentication.|
|[SSLKeyLocation](#sslkeylocation)|Specify the location of SSL private key files for client authentication.|
|[SSLCALocation](#sslcalocation)|Specify the location of certificate authority (CA) files for SSL server certificate verification.|
|[StartAgentPollers](#startagentpollers)|Set the number of pre-forked instances of asynchronous Zabbix agent pollers.|
|[StartBrowserPollers](#startbrowserpollers)|Set the number of pre-forked instances of browser item pollers.|
|[StartDBSyncers](#startdbsyncers)|Set the number of pre-forked instances of history syncers.|
|[StartDiscoverers](#startdiscoverers)|Set the number of pre-forked instances of discovery workers.|
|[StartHTTPAgentPollers](#starthttpagentpollers)|Set the number of pre-forked instances of asynchronous HTTP agent pollers.|
|[StartHTTPPollers](#starthttppollers)|Set the number of pre-forked instances of HTTP pollers.|
|[StartIPMIPollers](#startipmipollers)|Set the number of pre-forked instances of IPMI pollers.|
|[StartJavaPollers](#startjavapollers)|Set the number of pre-forked instances of Java pollers.|
|[StartODBCPollers](#startodbcpollers)|Set the number of pre-forked instances of ODBC pollers.|
|[StartPingers](#startpingers)|Set the number of pre-forked instances of ICMP pingers.|
|[StartPollersUnreachable](#startpollersunreachable)|Set the number of pre-forked instances of pollers for unreachable hosts (including IPMI and Java).|
|[StartPollers](#startpollers)|Set the number of pre-forked instances of pollers.|
|[StartPreprocessors](#startpreprocessors)|Set the number of pre-started instances of preprocessing workers.|
|[StartSNMPPollers](#startsnmppollers)|Set the number of pre-forked instances of asynchronous SNMP pollers.|
|[StartSNMPTrapper](#startsnmptrapper)|Set to "1" to start an SNMP trapper process.|
|[StartTrappers](#starttrappers)|Set the number of pre-forked instances of trappers.|
|[StartVMwareCollectors](#startvmwarecollectors)|Set the number of pre-forked VMware collector instances.|
|[StatsAllowedIP](#statsallowedip)|Specify IP addresses or DNS names of external Zabbix instances that are allowed to request stats.|
|[Timeout](#timeout)|Specify how long to wait (in seconds) for establishing connection and exchanging data with Zabbix proxy, agent, web service, and for SNMP checks (except SNMP `walk[OID]` and `get[OID]` items).|
|[TLSAccept](#tlsaccept)|Specify the level of encryption required for incoming connections from Zabbix server.|
|[TLSCAFile](#tlscafile)|Specify full pathname of the file containing the top-level CA(s) certificates for peer certificate verification, used for encrypted communications between Zabbix components.|
|[TLSCertFile](#tlscertfile)|Specify full pathname of the file containing the server certificate or certificate chain, used for encrypted communications between Zabbix components.|
|[TLSCipherAll](#tlscipherall)|Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.|
|[TLSCipherAll13](#tlscipherall13)|Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.|
|[TLSCipherCert](#tlsciphercert)|Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for certificate-based encryption.|
|[TLSCipherCert13](#tlsciphercert13)|Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for certificate-based encryption.|
|[TLSCipherPSK](#tlscipherpsk)|Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string. Override the default ciphersuite selection criteria for PSK-based encryption.|
|[TLSCipherPSK13](#tlscipherpsk13)|Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3. Override the default ciphersuite selection criteria for PSK-based encryption.|
|[TLSConnect](#tlsconnect)|Specify the level of encryption required for connections to Zabbix server.|
|[TLSCRLFile](#tlscrlfile)|Specify full pathname of the file containing revoked certificates. This parameter is used for encrypted communications between Zabbix components.|
|[TLSKeyFile](#tlskeyfile)|Specify full pathname of the file containing the proxy private key, used for encrypted communications between Zabbix components.|
|[TLSListen](#tlslisten)|Require TLS-only connections on the trapper socket.|
|[TLSPSKFile](#tlspskfile)|Specify full pathname of the file containing the proxy pre-shared key, used for encrypted communications with Zabbix server.|
|[TLSPSKIdentity](#tlspskidentity)|Specify the pre-shared key identity string, used for encrypted communications with Zabbix server.|
|[TLSServerCertIssuer](#tlsservercertissuer)|Specify the allowed server certificate issuer.|
|[TLSServerCertSubject](#tlsservercertsubject)|Specify the allowed server certificate subject.|
|[TmpDir](#tmpdir)|Specify the temporary directory.|
|[TrapperTimeout](#trappertimeout)|Specify timeout in seconds for: <br> - retrieval of configuration data from the Zabbix server;<br> - global script execution or remote command execution.|
|[UnavailableDelay](#unavailabledelay)|Set the frequency of checking host availability during the unavailability period.|
|[UnreachableDelay](#unreachabledelay)|Set the frequency of checking host availability during the unreachability period.|
|[UnreachablePeriod](#unreachableperiod)|Set after how many seconds of unreachability treat host as unavailable.|
|[User](#user)|Drop privileges to a specific, existing user on the system.|
|[Vault](#vault)|Specify the vault provider.|
|[VaultDBPath](#vaultdbpath)|Specify the location for retrieving database credentials by keys.|
|[VaultPrefix](#vaultprefix)|Specify custom prefix for the vault path or query.|
|[VaultTLSCertFile](#vaulttlscertfile)|Specify the name of the SSL certificate file used for client authentication.|
|[VaultTLSKeyFile](#vaulttlskeyfile)|Specify the name of the SSL private key file used for client authentication.|
|[VaultToken](#vaulttoken)|Specify the HashiCorp vault authentication token.|
|[VaultURL](#vaulturl)|Specify the vault server URL.|
|[VMwareCacheSize](#vmwarecachesize)|Set the shared memory size for storing VMware data.|
|[VMwareFrequency](#vmwarefrequency)|Set the frequency of data gathering from a single VMware service in seconds.|
|[VMwarePerfFrequency](#vmwareperffrequency)|Set the frequency of retrieving performance counter statistics from a single VMware service in seconds.|
|[VMwareTimeout](#vmwaretimeout)|Set the maximum number of seconds a `vmware collector` will wait for a response from VMware service.|
|[WebDriverURL](#webdriverurl)|Specify the WebDriver interface URL.|

Note that:

-   The default values reflect daemon defaults, not the values in the shipped configuration files.
-   Values support [environment variables](/manual/appendix/config/environment_variables).
-   Zabbix supports configuration files only in UTF-8 encoding without [BOM](https://en.wikipedia.org/wiki/Byte_order_mark).
-   Comments starting with "\#" are only supported in the beginning of the line.

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### Parameter details

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##### AllowRoot

Allow proxy to run as `root`.
If disabled and the proxy is started by `root`, the proxy will try to switch to the `zabbix` user instead.
Has no effect if started under a regular user.

Default: `0`<br>
Values: 0 - do not allow; 1 - allow

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##### AllowUnsupportedDBVersions

Allow proxy to work with unsupported database versions.

Default: `0`<br>
Values: 0 - do not allow; 1 - allow

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##### CacheSize

Set the configuration cache size, in bytes.
The shared memory size for storing host and item data.

Default: `32M`<br>
Range: 128K-64G

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##### ConfigFrequency

This parameter is **deprecated** (use [ProxyConfigFrequency](#proxyconfigfrequency) instead).<br>Set the frequency of retrieving configuration data from Zabbix server (in seconds).<br>Active proxy parameter.
Ignored for passive proxies (see [ProxyMode](#proxymode) parameter).

Default: `3600`<br>
Range: 1-604800

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##### DataSenderFrequency

Set the frequency of sending collected data from proxy to Zabbix server.
Note that an active proxy will still poll Zabbix server every second for remote command tasks.<br>Active proxy parameter.
Ignored for passive proxies (see ProxyMode parameter).

Default: `1`<br>
Range: 1-3600

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##### DBHost

Specify the database host (or socket directory).

For MySQL:

-   `localhost` or an empty string uses the default UNIX-domain socket.

For PostgreSQL:

-   `localhost` is resolved via DNS (typically to 127.0.0.1).
-   An empty string uses the default UNIX-domain socket.
-   A path (for example, `/var/run/pgbouncer`) results in using the UNIX socket at that path.
-   A comma-separated list can contain multiple `host:port` values. Each host is tried in order until a read-write connection is established.
Example: `DBHost=localhost:5431,127.0.0.1:20051,zabbix.domain,[::1]:30051,[12fc::1]`

Default: `localhost`

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##### DBName

Specify the database name or path to the database file for SQLite3 (the multi-process architecture of Zabbix does not allow to use [in-memory database](https://www.sqlite.org/inmemorydb.html), e.g. `:memory:`, `file::memory:?cache=shared` or `file:memdb1?mode=memory&cache=shared`).<br>*Warning*: Do not attempt to use the same database the Zabbix server is using.

Mandatory: Yes

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##### DBPassword

Specify the database password.
Comment this line if no password is used.
Ignored for SQLite.

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##### DBPort

Specify the port of the Zabbix database host (see [`DBHost`](#dbhost)). Ignored for SQLite.<br>
DBSocket and DBPort are mutually exclusive in proxy configuration. Specify only one, or leave both undefined.

Default for MySQL: `3306`

Default for PostgreSQL: `5432`

Range: 1024-65535

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##### DBSchema

Specify the database schema name.
Used for PostgreSQL.

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##### DBSocket

Specify path to the MySQL socket file.<br>DBSocket and DBPort are mutually exclusive in proxy configuration. Specify only one, or leave both undefined.

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##### DBUser

Specify the database user.
Ignored for SQLite.

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##### DBTLSConnect

Specify a value to enforce a TLS connection to the database:<br>*required* - connect using TLS<br>*verify\_ca* - connect using TLS and verify certificate<br>*verify\_full* - connect using TLS, verify certificate and verify that database identity specified by DBHost matches its certificate<br>On MySQL starting from 5.7.11 and PostgreSQL the following values are supported: "required", "verify", "verify\_full".<br>On MariaDB starting from version 10.2.6 "required" and "verify\_full" values are supported.<br>By default not set to any option and the behavior depends on database configuration.

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##### DBTLSCAFile

Specify full pathname of the file containing the top-level CA(s) certificates for database certificate verification.

Mandatory: no (yes, if DBTLSConnect set to *verify\_ca* or *verify\_full*)

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##### DBTLSCertFile

Specify full pathname of the file containing the Zabbix proxy certificate for authenticating to database.

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##### DBTLSKeyFile

Specify full pathname of the file containing the private key for authenticating to the database.

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##### DBTLSCipher

Specify the list of encryption ciphers that Zabbix proxy permits for TLS protocols up through TLS v1.2.
Supported only for MySQL.

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##### DBTLSCipher13

Specify the list of encryption ciphersuites that Zabbix proxy permits for the TLS v1.3 protocol.
Supported only for MySQL, starting from version 8.0.16.

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##### DebugLevel

Set the debug level:<br>*0* - basic information about starting and stopping of Zabbix processes<br>*1* - critical information;<br>*2* - error information;<br>*3* - warnings;<br>*4* - for debugging (produces lots of information);<br>*5* - extended debugging (produces even more information).

Default: `3`<br>
Range: 0-5

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##### EnableRemoteCommands

Allow remote commands from Zabbix server.

Default: `0`<br>
Values: 0 - do not allow; 1 - allow

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##### ExternalScripts

Specify the external script location (depends on the `datadir` compile-time installation variable).

Default: `/usr/local/share/zabbix/externalscripts`

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##### Fping6Location

Specify the fping6 location.
Make sure that the fping6 binary has root ownership and the SUID flag set.
Make empty ("Fping6Location=") if your fping utility is capable to process IPv6 addresses.

Default: `/usr/sbin/fping6`

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##### FpingLocation

Specify the fping location.
Make sure that the fping binary has root ownership and the SUID flag set.

Default: `/usr/sbin/fping`

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##### HistoryCacheSize

Set the history cache size, in bytes.
The shared memory size for storing history data.

Default: `16M`<br>
Range: 128K-16G

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##### HistoryIndexCacheSize

Set the history index cache size, in bytes.
The shared memory size for indexing the history data stored in history cache.
The index cache size needs roughly 100 bytes to cache one item.

Default: `4M`<br>
Range: 128K-16G

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##### Hostname

Specify a unique, case-sensitive proxy name.
Make sure the proxy name is known to the server.<br>Allowed characters: alphanumeric, '.', ' ', '\_' and '-'.
Maximum length: 128

Default: Set by HostnameItem

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##### HostnameItem

Specify an item for setting Hostname (if undefined).<br>
This item will be run on the proxy similarly as on an agent.<br>
Ignored if Hostname is set.<br>Does not support user parameters, performance counters, or aliases; does support `system.run[]`.

Default: `system.hostname`

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##### HousekeepingFrequency

Set the housekeeping procedure frequency (in hours).
Housekeeping is removing outdated information from the database.<br>*Note*: To lower load on proxy startup housekeeping is postponed for 30 minutes after proxy start.
Thus, if HousekeepingFrequency is 1, the very first housekeeping procedure after proxy start will run after 30 minutes, and will repeat every hour thereafter.<br>It is possible to disable automatic housekeeping by setting HousekeepingFrequency to 0.
In this case the housekeeping procedure can only be started by *housekeeper\_execute* runtime control option.<br>See also [runtime control](/manual/concepts/proxy#runtime-control) options and details on the [housekeeping procedure](/manual/concepts/proxy#housekeeping-procedure).

Default: `1`<br>
Range: 0-24

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##### Include

Specify a directory or individual files to be included in the configuration file.<br>To only include relevant files in the specified directory, the asterisk wildcard character is supported for pattern matching.<br>See [special notes](special_notes_include) about limitations.

Example:

```default
Include=/absolute/path/to/config/files/*.conf
```

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##### JavaGateway

Specify the IP address or hostname of Zabbix Java gateway.
Only required if Java pollers are started.

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##### JavaGatewayPort

Specify the Zabbix Java gateway port.

Default: `10052`<br>
Range: 1024-32767

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##### ListenBacklog

Set the maximum number of pending connections in the TCP queue.<br>The default value is a hard-coded constant, which depends on the system.<br>The maximum supported value depends on the system, too high values may be silently truncated to the 'implementation-specified maximum'.

Default: `SOMAXCONN`<br>
Range: 0 - INT\_MAX

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##### ListenIP

Specify the trapper listen IP address. A comma-delimited list.<br>Trapper will listen on all network interfaces if this parameter is not specified.

Default: `0.0.0.0`

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##### ListenPort

Specify the trapper listen port.

Default: `10051`<br>
Range: 1024-32767

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##### LoadModule

Specify the module to load at proxy startup.
Modules are used to extend the functionality of the proxy.
The module must be located in the directory specified by LoadModulePath or the path must precede the module name.
If the preceding path is absolute (starts with '/') then LoadModulePath is ignored.<br>Formats:<br>LoadModule=<module.so><br>LoadModule=<path/module.so><br>LoadModule=</abs\_path/module.so><br>It is allowed to include multiple LoadModule parameters.

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##### LoadModulePath

The full path to the location of proxy modules.
The default depends on compilation options.

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##### LogFile

Specify the proxy log file.

Mandatory: Yes, if LogType is set to *file*; otherwise no

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##### LogFileSize

Set the maximum log file size (in MB).<br>0 - disable automatic log rotation.<br>*Note*: If the log file size limit is reached and file rotation fails, for whatever reason, the existing log file is truncated and started anew.

Default: `1`<br>
Range: 0-1024

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##### LogRemoteCommands

Enable the logging of executed shell commands as warnings.

Default: `0`<br>
Values: 0 - disabled, 1 - enabled

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##### LogSlowQueries

Set the maximum duration a database query may take before being logged (in milliseconds).<br>0 - don't log slow queries.<br>This option becomes enabled starting with DebugLevel=3.

Default: `0`<br>
Range: 0-3600000

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##### LogType

Specify the log output type:<br>*file* - write log to the file specified by LogFile parameter;<br>*system* - write log to syslog;<br>*console* - write log to standard output.

Default: `file`

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##### MaxConcurrentChecksPerPoller

Set the maximum number of asynchronous checks that can be executed at once by each HTTP agent poller, agent poller, or SNMP poller.
See [StartHTTPAgentPollers](#starthttpagentpollers), [StartAgentPollers](#startagentpollers), and [StartSNMPPollers](#startsnmppollers).

Default: `1000`<br>
Range: 1-1000

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##### PidFile

Specify the PID file.

Default: `/tmp/zabbix_proxy.pid`

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##### ProxyBufferMode

Specify the storage mechanism for history, discovery, and autoregistration data:<br>*disk* - data is stored in database and uploaded from database;<br>*memory* - data is stored in memory and uploaded from memory.
If buffer runs out of memory the old data will be discarded.
On shutdown the buffer is discarded.<br>
*hybrid* - the proxy buffer normally works like in the memory mode until it runs out of memory or the oldest record exceeds the configured age.
If that happens the buffer is flushed to database and it works like in disk mode until all data have been uploaded and it starts working with memory again.
On shutdown the memory buffer is flushed to database.

See also: [Proxy memory buffer](/manual/concepts/proxy#memory-buffer).

Default: `disk`<br>
Values: disk; memory; hybrid

[comment]: # ({/new-92cc63b4})

[comment]: # ({new-1289de66})
##### ProxyConfigFrequency

Set the frequency of retrieving configuration data from Zabbix server in seconds.<br>Active proxy parameter.
Ignored for passive proxies (see [ProxyMode](#proxymode) parameter).

Default: `10`<br>
Range: 1-604800

[comment]: # ({/new-1289de66})

[comment]: # ({new-a8e60c77})
##### ProxyLocalBuffer

Set the duration of keeping data locally (in hours), even if the data have already been synced with the server..<br>This parameter may be used if local data will be used by third-party applications.

Default: `0`<br>
Range: 0-720

[comment]: # ({/new-a8e60c77})

[comment]: # ({new-f9a4db8a})

##### ProxyMemoryBufferAge

Set the maximum age of data in the proxy memory buffer in seconds.<br>
When enabled (not zero) and records in proxy memory buffer are older, then it forces proxy buffer to switch to database mode until all records are uploaded to server.
This parameter must be less or equal to ProxyOfflineBuffer parameter.

Default: `0`<br>
Range: 0;600-864000

[comment]: # ({/new-f9a4db8a})

[comment]: # ({new-ff2de06f})

##### ProxyMemoryBufferSize

Set the shared memory cache size for collected history, discovery, and auto registration data (in bytes).
If enabled (not zero) proxy will keep history discovery and autoregistration data in memory unless cache is full or stored records are older than defined ProxyMemoryBufferAge.
This parameter cannot be used together with ProxyLocalBuffer parameter.

Default: `0`<br>
Range: 0;128K-2G

[comment]: # ({/new-ff2de06f})

[comment]: # ({new-9ff179d3})
##### ProxyMode

Set the proxy operating mode.<br>0 - proxy in the active mode<br>1 - proxy in the passive mode<br>*Note* that (sensitive) proxy configuration data may become available to parties having access to the Zabbix server trapper port when using an active proxy.
This is possible because anyone may pretend to be an active proxy and request configuration data; authentication does not take place.

Default: `0`<br>
Range: 0-1

[comment]: # ({/new-9ff179d3})

[comment]: # ({new-de891fc0})
##### ProxyOfflineBuffer

Set the duration of keeping data (in hours) in case of no connectivity with Zabbix server.<br>Older data will be lost.

Default: `1`<br>
Range: 1-720

[comment]: # ({/new-de891fc0})

[comment]: # ({new-a5cda34e})
##### Server

If ProxyMode is set to `active`: specify Zabbix server IP address or DNS name (address:port) or [cluster](/manual/concepts/server/ha) (address:port;address2:port) to get configuration data from and send data to.<br>If port is not specified, the default port is used.<br>Cluster nodes must be separated by a semicolon.<br><br>If ProxyMode is set to `passive`: specify IP addresses, optionally in CIDR notation, or DNS names of Zabbix server. A comma-delimited list.<br>
Incoming connections will be accepted only from the addresses listed here.
If IPv6 support is enabled then '127.0.0.1', '::127.0.0.1', '::ffff:127.0.0.1' are treated equally.<br>'::/0' will allow any IPv4 or IPv6 address.
'0.0.0.0/0' can be used to allow any IPv4 address.

Example: 

```default
Server=127.0.0.1,192.168.1.0/24,::1,2001:db8::/32,zabbix.example.com
```

Mandatory: yes

[comment]: # ({/new-a5cda34e})

[comment]: # ({new-6984d380})
##### SNMPTrapperFile

Specify the temporary file used for passing data from the SNMP trap daemon to the proxy.<br>Must be the same as in `zabbix_trap_receiver.pl` or SNMPTT configuration file.

Default: `/tmp/zabbix_traps.tmp`

[comment]: # ({/new-6984d380})

[comment]: # ({new-8ab25b82})
##### SocketDir

Specify the directory for storing IPC sockets used by internal Zabbix services.

Default: `/tmp`

[comment]: # ({/new-8ab25b82})

[comment]: # ({new-94ec4682})
##### SourceIP

Specify the source IP address for:

-   outgoing connections to Zabbix server
-   agentless connections (VMware, SSH, JMX, SNMP, Telnet and simple checks)
-   HTTP agent connections
-   script item JavaScript HTTP requests
-   preprocessing JavaScript HTTP requests
-   connections to the Vault

[comment]: # ({/new-94ec4682})

[comment]: # ({new-d3fc6fd2})
##### SSHKeyLocation

Specify the location of public and private keys for SSH checks and actions.

[comment]: # ({/new-d3fc6fd2})

[comment]: # ({new-752b95c3})
##### SSLCertLocation

Specify the location of SSL-client certificate files for client authentication.<br>This parameter is used in web monitoring only.

[comment]: # ({/new-752b95c3})

[comment]: # ({new-005ddd3a})
##### SSLKeyLocation

Specify the location of SSL private key files for client authentication.<br>This parameter is used in web monitoring only.

[comment]: # ({/new-005ddd3a})

[comment]: # ({new-9e6c8051})
##### SSLCALocation

Specify the location of certificate authority (CA) files for SSL server certificate verification.<br>Note that the value of this parameter will be set as the CURLOPT\_CAPATH libcurl option.
For libcurl versions before 7.42.0, this only has effect if libcurl was compiled to use OpenSSL.
For more information see the [cURL web page](http://curl.haxx.se/libcurl/c/CURLOPT_CAPATH.html).<br>This parameter is used in web monitoring and in SMTP authentication.

[comment]: # ({/new-9e6c8051})

[comment]: # ({new-5563dd3f})
##### StartAgentPollers

Set the number of pre-forked instances of Zabbix agent [`pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).
See [MaxConcurrentChecksPerPoller](#maxconcurrentchecksperpoller).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-5563dd3f})

[comment]: # ({new-77e3bbd2})
##### StartBrowserPollers

Set the number of pre-forked instances of browser item [`pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-77e3bbd2})

[comment]: # ({new-13933066})
##### StartDBSyncers

Set the number of pre-forked instances of [`history syncers`](/manual/concepts/proxy#proxy-process-types-and-threads).<br>*Note*: Be careful when changing this value, increasing it may do more harm than good.

Default: `4`<br>
Range: 1-100

[comment]: # ({/new-13933066})

[comment]: # ({new-2d92ef95})
##### StartDiscoverers

Set the number of pre-forked instances of [`discovery workers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `5`<br>
Range: 0-1000

[comment]: # ({/new-2d92ef95})

[comment]: # ({new-96160e05})
##### StartHTTPAgentPollers

Set the number of pre-forked instances of [`HTTP agent pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).
See [MaxConcurrentChecksPerPoller](#maxconcurrentchecksperpoller).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-96160e05})

[comment]: # ({new-4493a1db})
##### StartHTTPPollers

Set the number of pre-forked instances of [`HTTP pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-4493a1db})

[comment]: # ({new-bff9bcdc})
##### StartIPMIPollers

Set the number of pre-forked instances of [`IPMI pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `0`<br>
Range: 0-1000

[comment]: # ({/new-bff9bcdc})

[comment]: # ({new-9f5d0d89})
##### StartJavaPollers

Set the number of pre-forked instances of [`Java pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `0`<br>
Range: 0-1000

[comment]: # ({/new-9f5d0d89})

[comment]: # ({new-e8b76471})
##### StartODBCPollers

Set the number of pre-forked instances of [`ODBC pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-e8b76471})

[comment]: # ({new-fa161a46})
##### StartPingers

Set the number of pre-forked instances of [`ICMP pingers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-fa161a46})

[comment]: # ({new-eef37c0d})
##### StartPollersUnreachable

Set the number of pre-forked instances of [pollers for unreachable hosts](/manual/concepts/proxy#proxy-process-types-and-threads) (including IPMI and Java).
At least one poller for unreachable hosts must be running if regular, IPMI or Java pollers are started.

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-eef37c0d})

[comment]: # ({new-9d7927c0})
##### StartPollers

Set the number of pre-forked instances of [`pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).

Default: `5`<br>
Range: 0-1000

[comment]: # ({/new-9d7927c0})

[comment]: # ({new-8e40eddf})
##### StartPreprocessors

Set the number of pre-started instances of preprocessing [`worker`](/manual/concepts/proxy#proxy-process-types-and-threads) threads should be set to no less than the available CPU core count.
More workers should be set if preprocessing is not CPU-bound and has lots of network requests.

Default: `16`<br>
Range: 1-1000

[comment]: # ({/new-8e40eddf})

[comment]: # ({new-8bb450cd})
##### StartSNMPPollers

Set the number of pre-forked instances of [`SNMP pollers`](/manual/concepts/proxy#proxy-process-types-and-threads).
See [MaxConcurrentChecksPerPoller](#maxconcurrentchecksperpoller).

Default: `1`<br>
Range: 0-1000

[comment]: # ({/new-8bb450cd})

[comment]: # ({new-43ff6725})
##### StartSNMPTrapper

Set to "1" to start an [`SNMP trapper`](/manual/concepts/proxy#proxy-process-types-and-threads) process.

Default: `0`<br>
Range: 0-1

[comment]: # ({/new-43ff6725})

[comment]: # ({new-3943d442})
##### StartTrappers

Set the number of pre-forked instances of [`trappers`](/manual/concepts/proxy#proxy-process-types-and-threads).<br>Trappers accept incoming connections from Zabbix sender and active agents.

Default: `5`<br>
Range: 0-1000

[comment]: # ({/new-3943d442})

[comment]: # ({new-3a4ddabb})
##### StartVMwareCollectors

Set the number of pre-forked [`vmware collector`](/manual/concepts/proxy#proxy-process-types-and-threads) instances.

Default: `0`<br>
Range: 0-250

[comment]: # ({/new-3a4ddabb})

[comment]: # ({new-32b0fe66})
##### StatsAllowedIP

Specify IP addresses (optionally in CIDR notation) or DNS names of external Zabbix instances that are allowed to request stats. A comma-delimited list.<br>
If this parameter is not set no stats requests will be accepted.<br>If IPv6 support is enabled then '127.0.0.1', '::127.0.0.1', '::ffff:127.0.0.1' are treated equally and '::/0' will allow any IPv4 or IPv6 address.
'0.0.0.0/0' can be used to allow any IPv4 address.

Example:

```default
StatsAllowedIP=127.0.0.1,192.168.1.0/24,::1,2001:db8::/32,zabbix.example.com
```

[comment]: # ({/new-32b0fe66})

[comment]: # ({new-136f6bfe})
##### Timeout

Specify how long to wait (in seconds) for establishing connection and exchanging data with Zabbix server, agent, web service, and legacy SNMP checks (single OID number or string).

This parameter defines the duration for various communication operations:

-   Remote command execution on Zabbix agent
-   SSH / Telnet command execution
-   Rescheduling of items when IPMI interface becomes unavailable
-   Sending response to Zabbix server when failing to exchange data due to rights or encryption issues
-   Deadline for IPC asynchronous sockets and runtime control options
-   Asynchronous poller DNS requests
-   Response for active check heartbeat
-   Retrieval of Zabbix agent data (values) from active agents
-   Retrieval of data from Zabbix sender
-   Sending active check list to Zabbix agent

This timeout will **not** be used for those checks that have [flexible timeout](/manual/config/items/item#item-timeout) settings configured in the frontend (on global, proxy, or per-item level). 
For example, SNMP `walk[OID]` and `get[OID]` items use the configured timeout from the frontend; legacy SNMP checks still use the server timeout value.

Default: `3`<br>
Range: 1-30

[comment]: # ({/new-136f6bfe})

[comment]: # ({new-b2420c82})
##### TLSAccept

Specify the level of encryption required for incoming connections from Zabbix server.
Used for a passive proxy, ignored on an active proxy.
Multiple values can be specified, separated by comma:<br>*unencrypted* - accept connections without encryption (default)<br>*psk* - accept connections with TLS and a pre-shared key (PSK)<br>*cert* - accept connections with TLS and a certificate

Mandatory: yes for passive proxy, if TLS certificate or PSK parameters are defined (even for *unencrypted* connection); otherwise no

[comment]: # ({/new-b2420c82})

[comment]: # ({new-a1178240})
##### TLSCAFile

Specify full pathname of the file containing the top-level CA(s) certificates for peer certificate verification, used for encrypted communications between Zabbix components.

[comment]: # ({/new-a1178240})

[comment]: # ({new-a8ec843d})
##### TLSCertFile
Specify full pathname of the file containing the proxy certificate or certificate chain, used for encrypted communications between Zabbix components.

[comment]: # ({/new-a8ec843d})

[comment]: # ({new-c9ea574f})
##### TLSCipherAll

Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string.
Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.

Example:

```default
TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256
```

[comment]: # ({/new-c9ea574f})

[comment]: # ({new-985d238a})
##### TLSCipherAll13

Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3.
Override the default ciphersuite selection criteria for certificate- and PSK-based encryption.

Example for GnuTLS: 

```default
NONE:+VERS-TLS1.2:+ECDHE-RSA:+RSA:+ECDHE-PSK:+PSK:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL::+SIGN-ALL:+CTYPE-X.509
```

Example for OpenSSL: 

```default
EECDH+aRSA+AES128:RSA+aRSA+AES128:kECDHEPSK+AES128:kPSK+AES128
```

[comment]: # ({/new-985d238a})

[comment]: # ({new-ccd8c768})
##### TLSCipherCert

Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string.
Override the default ciphersuite selection criteria for certificate-based encryption.

Example for GnuTLS: 

```default
NONE:+VERS-TLS1.2:+ECDHE-RSA:+RSA:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL:+SIGN-ALL:+CTYPE-X.509
```

Example for OpenSSL: 

```default
EECDH+aRSA+AES128:RSA+aRSA+AES128
```

[comment]: # ({/new-ccd8c768})

[comment]: # ({new-d746a953})
##### TLSCipherCert13

Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3.
Override the default ciphersuite selection criteria for certificate-based encryption.

[comment]: # ({/new-d746a953})

[comment]: # ({new-5d6b530a})
##### TLSCipherPSK

Specify the GnuTLS priority string or OpenSSL (TLS 1.2) cipher string.
Override the default ciphersuite selection criteria for PSK-based encryption.

Example for GnuTLS: 

```default
NONE:+VERS-TLS1.2:+ECDHE-PSK:+PSK:+AES-128-GCM:+AES-128-CBC:+AEAD:+SHA256:+SHA1:+CURVE-ALL:+COMP-NULL:+SIGN-ALL
```

Example for OpenSSL: 

```default
kECDHEPSK+AES128:kPSK+AES128
```

[comment]: # ({/new-5d6b530a})

[comment]: # ({new-afe5c125})
##### TLSCipherPSK13

Specify the cipher string for OpenSSL 1.1.1 or newer in TLS 1.3.
Override the default ciphersuite selection criteria for PSK-based encryption.

Example:

```default
TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256
```

[comment]: # ({/new-afe5c125})

[comment]: # ({new-b6a5938b})
##### TLSConnect

Specify the level of encryption required for proxy connections to Zabbix server.
Used for an active proxy, ignored on a passive proxy.
Only one value can be specified:<br>*unencrypted* - connect without encryption (default)<br>*psk* - connect using TLS and a pre-shared key (PSK)<br>*cert* - connect using TLS and a certificate

Mandatory: yes for active proxy, if TLS certificate or PSK parameters are defined (even for *unencrypted* connection); otherwise no

[comment]: # ({/new-b6a5938b})

[comment]: # ({new-4ff06d66})
##### TLSCRLFile

Specify full pathname of the file containing revoked certificates.
This parameter is used for encrypted communications between Zabbix components.

[comment]: # ({/new-4ff06d66})

[comment]: # ({new-2cc39b48})
##### TLSKeyFile

Specify full pathname of the file containing the proxy private key, used for encrypted communications between Zabbix components.

[comment]: # ({/new-2cc39b48})

[comment]: # ({new-878ddb66})
##### TLSListen

Require TLS-only connections on the trapper socket.

Supported values:

-   required - accept only TLS connections

[comment]: # ({/new-878ddb66})

[comment]: # ({new-0f2bf96e})
##### TLSPSKFile

Specify full pathname of the file containing the proxy pre-shared key, used for encrypted communications with Zabbix server.

[comment]: # ({/new-0f2bf96e})

[comment]: # ({new-b57e989d})
##### TLSPSKIdentity

Specify the pre-shared key identity string, used for encrypted communications with Zabbix server.

[comment]: # ({/new-b57e989d})

[comment]: # ({new-c8d8910c})
##### TLSServerCertIssuer

Specify the allowed server certificate issuer.

[comment]: # ({/new-c8d8910c})

[comment]: # ({new-89726b49})
##### TLSServerCertSubject

Specify the allowed server certificate subject.

[comment]: # ({/new-89726b49})

[comment]: # ({new-18ebe014})
##### TmpDir

Specify the temporary directory.

Default: `/tmp`

[comment]: # ({/new-18ebe014})

[comment]: # ({new-4880108e})
##### TrapperTimeout

Specify timeout in seconds for: <br> - retrieval of configuration data from the Zabbix server;<br> - global script execution or remote command execution.

Default: `300`<br>
Range: 1-300

[comment]: # ({/new-4880108e})

[comment]: # ({new-4d4f80c6})
##### UnavailableDelay

Set the frequency of checking host availability during the [unavailability](/manual/appendix/items/unreachability#unavailable-interface) period in seconds.

Default: `60`<br>
Range: 1-3600

[comment]: # ({/new-4d4f80c6})

[comment]: # ({new-fad94d05})
##### UnreachableDelay

Set the frequency of checking host availability during the [unreachability](/manual/appendix/items/unreachability#unreachable-interface) period in seconds.

Default: `15`<br>
Range: 1-3600

[comment]: # ({/new-fad94d05})

[comment]: # ({new-316715df})
##### UnreachablePeriod

Set after how many seconds of [unreachability](/manual/appendix/items/unreachability#unreachable-interface) treat host as unavailable.

Default: `45`<br>
Range: 1-3600

[comment]: # ({/new-316715df})

[comment]: # ({new-12e5d15b})
##### User

Drop privileges to a specific, existing user on the system.<br>Only has effect if run as `root` and AllowRoot is disabled.

Default: `zabbix`

[comment]: # ({/new-12e5d15b})

[comment]: # ({new-df11844d})
##### Vault

Specify the vault provider:<br>*HashiCorp* - HashiCorp KV Secrets Engine version 2<br>*CyberArk*  - CyberArk Central Credential Provider<br>Must match the vault provider set in the frontend.

Default: `HashiCorp`

[comment]: # ({/new-df11844d})

[comment]: # ({new-b096e1d2})
##### VaultDBPath

Specify the location for retrieving database credentials by keys. It is a Vault path or query, depending on the Vault.

The keys used for [HashiCorp](/manual/config/secrets/hashicorp#retrieving-database-credentials) are 'password' and 'username'.

Example path with VaultPrefix=/v1/secret/data/zabbix/:

```default
database
```

Example path without VaultPrefix:

```default
secret/zabbix/database
```

The keys used for [CyberArk](/manual/config/secrets/cyberark#database-credentials) are 'Content' and 'UserName'.

Example:

```default
AppID=zabbix_server&Query=Safe=passwordSafe;Object=zabbix_proxy_database
```

This option can only be used if DBUser and DBPassword are not specified.

[comment]: # ({/new-b096e1d2})

[comment]: # ({new-8d45efef})
##### VaultPrefix

Specify custom prefix for the vault path or query, depending on the Vault.
The most suitable defaults will be used if not specified.<br>Note that 'data' is automatically appended after mountpoint for HashiCorp if VaultPrefix is not specified.
<br>Note that 'data' is automatically appended after mountpoint for HashiCorp if VaultPrefix is not specified.

Example prefix for Hashicorp: 

```default
v1/secret/data/zabbix/
```

Example prefix for Cyberark: 

```default
/AIMWebService/api/Accounts?
```

[comment]: # ({/new-8d45efef})

[comment]: # ({new-2a2c177c})
##### VaultTLSCertFile

Specify the name of the SSL certificate file used for client authentication.
The certificate file must be in PEM1 format.<br>If the certificate file contains also the private key, leave the SSL key file field empty.<br>The directory containing this file is specified by the SSLCertLocation configuration parameter.<br>This option can be omitted, but is recommended for CyberArkCCP vault.

[comment]: # ({/new-2a2c177c})

[comment]: # ({new-7d66e718})
##### VaultTLSKeyFile

Specify the name of the SSL private key file used for client authentication.
The private key file must be in PEM1 format.<br>The directory containing this file is specified by the SSLKeyLocation configuration parameter.<br>This option can be omitted, but is recommended for CyberArkCCP vault.

[comment]: # ({/new-7d66e718})

[comment]: # ({new-54de6e11})
##### VaultToken

Specify the HashiCorp vault authentication token that should have been generated exclusively for Zabbix proxy with read-only permission to the path specified in the optional VaultDBPath configuration parameter.<br>It is an error if VaultToken and the VAULT\_TOKEN environment variable are defined at the same time.

Mandatory: Yes, if Vault is set to *HashiCorp*; otherwise no

[comment]: # ({/new-54de6e11})

[comment]: # ({new-0ad4c413})
##### VaultURL

Specify the vault server URL.
The system-wide CA certificates directory will be used if SSLCALocation is not specified.

Default: `https://127.0.0.1:8200`

[comment]: # ({/new-0ad4c413})

[comment]: # ({new-25ec9d34})
##### VMwareCacheSize

Set the shared memory size for storing VMware data.<br>A VMware internal check zabbix\[vmware,buffer,...\] can be used to monitor the VMware cache usage (see [Internal checks](/manual/config/items/itemtypes/internal)).<br>Note that shared memory is not allocated if there are no vmware collector instances configured to start.

Default: `8M`<br>
Range: 256K-2G

[comment]: # ({/new-25ec9d34})

[comment]: # ({new-cd0433e9})
##### VMwareFrequency

Set the frequency of data gathering from a single VMware service (in seconds).<br>This frequency should be set to the least update interval of any VMware monitoring item.

Default: `60`<br>
Range: 10-86400

[comment]: # ({/new-cd0433e9})

[comment]: # ({new-4eb71305})
##### VMwarePerfFrequency

Set the frequency of retrieving performance counter statistics from a single VMware service (in seconds).<br>This frequency should be set to the least update interval of any VMware monitoring [item](/manual/vm_monitoring/vmware_keys#footnotes) that uses VMware performance counters.

Default: `60`<br>
Range: 10-86400

[comment]: # ({/new-4eb71305})

[comment]: # ({new-c2a39b44})
##### VMwareTimeout

Set the maximum number of seconds a `vmware collector` will wait for a response from VMware service (vCenter or ESX hypervisor).

Default: `10`<br>
Range: 1-300

[comment]: # ({/new-c2a39b44})

[comment]: # ({new-336a13b8})
##### WebDriverURL

Specify the WebDriver interface URL.

Example (used with Selenium WebDriver standalone server):

```default
WebDriverURL=http://localhost:4444
```

[comment]: # ({/new-336a13b8})