fatal: unknown configuration directive IdentLookups

[sgohl]

on FreeBSD 13 (fresh installation) via ports

despite http://www.proftpd.org/docs/directives/linked/config_ref_IdentLookups.html stating that IdentLookups is in the core module:

# proftpd -t
Checking syntax of configuration file
2022-01-20 18:19:03,298 ftp proftpd[1122]: fatal: unknown configuration directive 'IdentLookups' on line 11 of '/usr/local/etc/proftpd.conf'

# proftpd -l
Compiled-in modules:
  mod_core.c
  mod_xfer.c
  mod_rlimit.c
  mod_auth_unix.c
  mod_auth_file.c
  mod_auth.c
  mod_ls.c
  mod_log.c
  mod_site.c
  mod_delay.c
  mod_facts.c
  mod_dso.c
  mod_auth_pam.c
  mod_ctrls.c
  mod_lang.c

# proftpd -V
Compile-time Settings:
  Version: 1.3.7c (maint)
  Platform: FREEBSD13 (FREEBSD13_0) [FreeBSD 13.0-RELEASE amd64]
  Built: Thu Jan 13 2022 17:10:05 UTC
  Built With:
    configure  '--localstatedir=/var/run' '--libexecdir=/usr/local/libexec/proftpd' '--with-pkgconfig=libdata/pkgconfig' '--sysconfdir=/usr/local/etc' '--enable-ctrls' '--enable-dso' '--disable-sendfile' '--enable-ipv6' '--disable-memcache' '--enable-nls' '--enable-pcre' '--disable-redis' '--with-shared=mod_ban:mod_copy:mod_ctrls_admin:mod_deflate:mod_dnsbl:mod_dynmasq:mod_exec:mod_ifsession:mod_ifversion:mod_qos:mod_quotatab:mod_quotatab_file:mod_quotatab_radius:mod_quotatab_sql:mod_radius:mod_ratio:mod_readme:mod_rewrite:mod_sftp:mod_sftp_pam:mod_sftp_sql:mod_shaper:mod_site_misc:mod_snmp:mod_sql:mod_sql_passwd:mod_tls:mod_tls_shmcache:mod_unique_id:mod_wrap2:mod_wrap2_file:mod_wrap2_sql' '--with-includes=/usr/local/include' '--with-libraries=/usr/local/lib' '--prefix=/usr/local' '--mandir=/usr/local/man' '--infodir=/usr/local/share/info/' '--build=amd64-portbld-freebsd13.0' 'build_alias=amd64-portbld-freebsd13.0' 'CC=cc' 'CFLAGS=-O2 -pipe  -DLIBICONV_PLUG -fstack-protector-strong -fno-strict-aliasing ' 'LDFLAGS= -lpthread  -fstack-protector-strong ' 'LIBS=-lssl -lcrypto -L/usr/lib' 'CPPFLAGS=-DHAVE_OPENSSL -I/usr/include -DLIBICONV_PLUG' 'CPP=cpp' 'CXX=c++' 'CXXFLAGS=-O2 -pipe -DLIBICONV_PLUG -fstack-protector-strong -fno-strict-aliasing  -DLIBICONV_PLUG '

  CFLAGS: -g2 -O2 -pipe  -DLIBICONV_PLUG -fstack-protector-strong -fno-strict-aliasing  -Wall -fno-omit-frame-pointer -fno-strict-aliasing -Werror=implicit-function-declaration
  LDFLAGS: -L$(top_srcdir)/lib -L$(top_builddir)/lib  -lpthread  -fstack-protector-strong  -rdynamic -L/usr/local/lib
  LIBS: -lintl  -lpcreposix -lpcre -lssl -lcrypto -lpam -lsupp -lexecinfo -lcrypt -lssl -lcrypto -L/usr/lib -lutil -pthread

  Files:
    Configuration File:
      /usr/local/etc/proftpd.conf
    Pid File:
      /var/run/proftpd.pid
    Scoreboard File:
      /var/run/proftpd.scoreboard
    Header Directory:
      /usr/local/include/proftpd
    Shared Module Directory:
      /usr/local/libexec/proftpd

  Info:
    + Max supported UID: 4294967295
    + Max supported GID: 4294967295

  Features:
    - Autoshadow support
    + Controls support
    + curses support
    - Developer support
    + DSO support
    + IPv6 support
    + Largefile support
    - Lastlog support
    - Memcache support
    + ncursesw support
    + NLS support
    + OpenSSL support (OpenSSL 1.1.1k-freebsd  24 Aug 2021)
    + PCRE support
    - POSIX ACL support
    - Redis support
    - Sendfile support
    - Shadow file support
    - Sodium support
    + Trace support
    + xattr support

  Tunable Options:
    PR_TUNABLE_BUFFER_SIZE = 1024
    PR_TUNABLE_DEFAULT_RCVBUFSZ = 8192
    PR_TUNABLE_DEFAULT_SNDBUFSZ = 8192
    PR_TUNABLE_ENV_MAX = 2048
    PR_TUNABLE_GLOBBING_MAX_MATCHES = 100000
    PR_TUNABLE_GLOBBING_MAX_RECURSION = 8
    PR_TUNABLE_HASH_TABLE_SIZE = 40
    PR_TUNABLE_LOGIN_MAX = 256
    PR_TUNABLE_NEW_POOL_SIZE = 512
    PR_TUNABLE_PATH_MAX = 1024
    PR_TUNABLE_SCOREBOARD_BUFFER_SIZE = 80
    PR_TUNABLE_SCOREBOARD_SCRUB_TIMER = 30
    PR_TUNABLE_SELECT_TIMEOUT = 30
    PR_TUNABLE_TIMEOUTIDENT = 10
    PR_TUNABLE_TIMEOUTIDLE = 600
    PR_TUNABLE_TIMEOUTLINGER = 10
    PR_TUNABLE_TIMEOUTLOGIN = 300
    PR_TUNABLE_TIMEOUTNOXFER = 300
    PR_TUNABLE_TIMEOUTSTALLED = 3600
    PR_TUNABLE_XFER_SCOREBOARD_UPDATES = 10

[Castaglia]

The mod_ident module is disabled by default; see #269.

The best way to handle this, in your ProFTPD configuration, is to use e.g.:

<IfModule mod_ident.c>
  IdentLookups off
</IfModule>

[sgohl]

Hi and thanks for your answer. It seemed like the mod_ident module was a bit deprecated and the function now went into the core (as the docs say, still), therefore I wanted to avoid loading this module just for this one reason.

Is this really the only way? So the docs are wrong?

[Castaglia]

You don't need to load the module, no. (Which particular docs are you looking at, that say the functionality went into the core? I suspect those docs are stale, out-of-date.)

If you actually want the mod_ident functionality, then you need to load the module. Otherwise, the "fix" is either:

• a) remove that IdentLookups directive from your config file, or
• b) put the IdentLookups directive in the conditional <IfModule> block, as mentioned

[sgohl]

Which particular docs are you looking at

http://www.proftpd.org/docs/directives/linked/config_ref_IdentLookups.html

what I meant with "went into", was, that I know it used to be in the separate module ident. But seeing it stated as mod_core i just came to the conclusion that the module was being merged into the core. That was just my assumption.

Module
mod_core

If I add the conditional, I can't be really sure the statement is effectively enabled. In fact, if I leave out the conditional statement, it's what I currently got - it's not working. Therefore it seems that a module has to be loaded, and as it's not compiled with, it needs to be dso-loaded, what I actually don't want.

What I'd expect, is, that when I find a directive which is stated with "Module: mod_core", I should be able use it right away.
Otherwise I may misunderstand the docs itself.

But accepting the fact that I got 2 options now, I'd consider the question as answered. So thanks :)

[Castaglia]

For the record, here are the maintained, up-to-date documentation for these modules:

• mod_core
• mod_ident

And I've filed #1378 to remove the confusing, out-of-date docs.

Thanks!