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Apache Module mod_ident

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Description:RFC 1413 ident lookups
Module Identifier:ident_module
Source File:mod_ident.c
Compatibility:Available in Apache 2.1 and later


This module queries an RFC 1413 compatible daemon on a remote host to look up the owner of a connection.

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IdentityCheck Directive

Description:Enables logging of the RFC 1413 identity of the remote user
Syntax:IdentityCheck On|Off
Default:IdentityCheck Off
Context:server config, virtual host, directory
Compatibility:Moved out of core in Apache 2.1

This directive enables RFC 1413-compliant logging of the remote user name for each connection, where the client machine runs identd or something similar. This information is logged in the access log using the %...l format string.

The information should not be trusted in any way except for rudimentary usage tracking.

Note that this can cause serious latency problems accessing your server since every request requires one of these lookups to be performed. When firewalls or proxy servers are involved, each lookup might possibly fail and add a latency duration as defined by the IdentityCheckTimeout directive to each hit. So in general this is not very useful on public servers accessible from the Internet.


IdentityCheckTimeout Directive

Description:Determines the timeout duration for ident requests
Syntax:IdentityCheckTimeout seconds
Default:IdentityCheckTimeout 30
Context:server config, virtual host, directory

This directive specifies the timeout duration of an ident request. The default value of 30 seconds is recommended by RFC 1413, mainly because of possible network latency. However, you may want to adjust the timeout value according to your local network speed.

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