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The Apache HTTP Server Reference Manual
by Apache Software Foundation
Paperback (6"x9"), 862 pages
ISBN 9781906966034
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3.44  Apache Module mod_ident



Description:

RFC 1413 ident lookups

Status:

Extension

Module Identifier:

ident_module

Source File:

mod_ident.c

Compatibility:

Available in Apache 2.1 and later



Summary

This module queries an RFC 141336 compatible daemon on a remote host to look up the owner of a connection.

Directives:

IdentityCheck

IdentityCheckTimeout

See also:

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

Status:

Extension

Module:

mod_ident

Compatibility:

Moved out of core in Apache 2.1

This directive enables RFC 141337 -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 (p. 656).

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

Status:

Extension

Module:

mod_ident

This directive specifies the timeout duration of an ident request. The default value of 30 seconds is recommended by RFC 141338 , 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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