mod_ident
RFC1413 Identification Support
The mod_ident module is ProFTPD's module for performing lookups of authenticated user IDs, as per RFC 1413.
This module is contained in the mod_ident.c file for ProFTPD 1.3.x, and is compiled by default. See the installation section for more details.
mod_ident.c
The most current version of mod_ident can be found in the ProFTPD source distribution:
http://www.proftpd.org/
<VirtualHost>
<Global>
The IdentLookups directive enables or disables the module's lookup of an "authenticated" user identity using RFC1413.
IdentLookups
Normally, when a client initially connects to ProFTPD, the mod_ident will attempt to use the ident protocol (RFC1413) to identify the remote username. This behavior can be disabled via this directive:
IdentLookups off
proftpd
$ ./configure --disable-ident ...
$ ./configure --enable-dso --with-shared=mod_ident ...
Logging The mod_ident module supports trace logging, via the module-specific log channels:
proftpd.conf
TraceLog /path/to/ftpd/trace.log Trace ident:20