Log Files

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Revision as of 03:27, 20 December 2012 by Trex (talk | contribs) (→‎Error Messages)
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Log Files

There are many log files produced by SME Server. Some are standard, some are generated by contributions. This page aims to bring together enough knowledge to understand what generates each log file, what they are for, and how to interpret them.

Access

Access to log files is available with the server-manager, Chapter10#View_log_files and Chapter10#Mail_log_file_analysis

You can also use shell access, eg, to perform more complex searches or manipulations.


Logfile Names

E-mail logfiles

qmail            - details mail distribution (to mailboxes and to other hosts via SMTP).
imap             - connections to the local imap folders
imaps            
pop3             - requests from users to collect mail from local server 
pop3s            
smtp-auth-proxy
maillog
qpsmtpd          - incoming SMTP connections
sqpsmtpd
clamav           - antivirus
clamd
freshclam        
spamd            - spam

HTTP logfiles

httpd
httpd-admin
squid
squid.run
qpdmtpd

System logfiles

messages
dnscache
iptables
iptraf
mysqld
nmbd
ntpd
oidentd
ppp
yum
tinydns
wan
vbox
cron
sshd
flexbackup
dhcpd
dhcpcd
dmesg
pppoe
pptpd
spooler
radius
radiusd
proftpd
raidmonitor
rpmpkgs
sa
samba
secure
rkhunter.log
boot.log
audit
anaconda.log
anaconda.syslog
lastlog

Error Messages

  • Log message regarding permissions on /var/spool/qpsmtpd/

You may see messages similar to this in your log file:

@400000004326e9472eccc42c 3243 trying to get config for spool_dir @400000004326e9472ed518fc 3243 Permissions on spool_dir /var/spool/qpsmtpd/ are not 0700

They can be safely ignored. Clamav runs under a different user and needs read access to the spool area to avoid copying the file. [[1]]


  • I get messages that look like: (pam_unix)[31705]: session opened for user root by (uid=0)

Most likely these messages coming from a package called SYSSTAT. The package was included in the previous versions of SMESERVER but were removed from the final version of V7. If you see the messages, most likely you had a previous version and upgraded. SYSSTAT isn't needed unless you have a contrib package called SME7ADMIN. 

You can safely remove the package by:
yum remove sysstat

Please note that these messages may be caused by other cron jobs (tasks that run automatically) or packages authenticating as root.

  • I get a message saying that: the RSA server certificate CommonName (CN)`servername.domainname.tld' does NOT match server name!

If you change the servername, you will be prompted to reboot. When you do, the SMESERVER will generate a certificate for the new servername-domainname combination and httpd.conf will now reference that new name. References to other virtual domains and hosts will generate warnings in the log.


  • I get: server squid[3145]: WARNING: Disk space over limit: 148412 KB > 102400 KB.

This message is just log noise. The message is informational and squid takes care of the issue itself.


  • I get in the radius log: Info: Using deprecated naslist file. Support for this will go away soon.

This is just the radius daemon (a computer program that runs in the background, rather than under the direct control of a user) complaining about a file that exists in the directory. We don't use it.


  • I get in the clamd log: Error: cli_untar: only standard TAR files are currently supported

Clam (the antivirus portion of SMESERVER) has found a file type which it can't deal with, and so is telling you that it can't scan that file.

Nothing to be concerned about. The fix, if any arrives, will come from the Clam team if they Determine this file format is worthy of their attention.


  • I get in the smeserver-clamscan.log: LibClamAV Warning: Multipart/alternative MIME message contains no boundary header.

This is just log noise. Clamav is scanning badly formatted MIME mail.


  • In the /var/log/messages, I get: 10fix_privilege_tables: ERROR

You can safely ignore these errors. The errors just mean that your tables are already up to date.


  • In the /var/log/messages, I get: rec_read bad magic....

You may also see it with 

cat /var/log/samba/* |grep printing |grep 'rec_read bad magic'

You can delete /var/cache/samba/printing/<printer>.tdb files & restart samba. 

rm /var/cache/samba/printing/<printer>.tdb
/etc/init.d/smbd restart


  • cannot remove /var/run/dovecot/login: is a directory

You may see this on system startup. It is just noise and doesn't affect anything.


  • I get:
rules: score undef for rule 'MISSING_SUBJECT' in  'MISSING_SUBJECT' at
/usr/lib/perl5/vendor_perl/5.8.5/Mail/SpamAssassin/PerMsgStatus.pm line 2140.

Ignore the message. The warnings are just log noise. After a SPAMASSASSIN update, the rules have been added but don't have a score associated with them. So they will be treated as non-existent and result in an error message.


  • I get:
2008-02-21 23:42:51.106904500 ClamAV update process started at Thu Feb 21 23:42:51 2008
2008-02-21 23:42:51.108696500 WARNING: Your ClamAV installation is OUTDATED!
2008-02-21 23:42:51.108700500 WARNING: Local version: 0.92 Recommended version: 0.92.1
2008-02-21 23:42:51.108704500 DON'T PANIC! Read http://www.clamav.net/support/faq
2008-02-21 23:42:51.108708500 main.inc is up to date (version: 45, sigs: 169676, f-level: 21, builder: sven)
2008-02-21 23:42:51.523757500 ERROR: cdiff_apply: lseek(desc, -350, SEEK_END) failed
2008-02-21 23:42:51.523760500 ERROR: getpatch: Can't apply patch
2008-02-21 23:42:51.523764500 WARNING: Incremental update failed, trying to download daily.cvd
2008-02-21 23:42:52.322303500 WARNING: Mirror 193.1.193.64 is not synchronized.

or: 

2008-02-22 00:44:14.874648500 Ignoring mirror 193.1.193.64 (due to previous errors)
2008-02-22 00:44:14.878360500 ERROR: Can't download daily.cvd from database.clamav.net
2008-02-22 00:44:14.879769500 Giving up on database.clamav.net...

Ignore the message. CLAMAV will fix itself on its own. The message is from CLAMAV saying it can't reach the updates. The messages will go away once they can be reached. Check Bugzilla:4002 and Bugzilla:3962

If you lose patience waiting for the messages to go away, you can execute the following commands: 

cd /var/clamav/
mv mirrors.dat mirrors.dat.old
sv t /service/freshclam


After a ClamAV update or when freshclam is run Bugzilla 7164 The following may appear in the log file 

LibClamAV Warning: Detected duplicate databases /var/clamav/main.cvd and /var/clamav/main.cld, 
please manually remove one of them


If you just leave it, freshclam should take of this as it is just log noise.

RK Hunter Messages

Root Kit Hunter performs a daily check of your system, these are common warnings.

/etc/cron.daily/01-rkhunter

  • The following processes are using deleted files

xyz

  • Process '/sbin/XXX' (PID 3869) is listening on the network.

xyz

  • The SSH and rkhunter configuration options should be the same:

xyz

  • Warning: SSH protocol v1 has been enabled

Servers that have been upgraded to 7.3 from 5.5 give warnings that SSL protocol V1 is enabled.

If you know that you do not use SSH protocol V1 (not SSL!), then you can remove protocol 1 by doing: 

config setprop sshd Protocol 2
signal-event remoteaccess-update
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