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Old 11-02-2014, 06:19 AM   #1
Registered: Oct 2014
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Communication logs in linux.

Hello Guys,

I am looking to fetch all communication/connecting hosts information for my Linux box.
I have identified two ways of communication.. One is the ssh2 connections (logs in /var/log/secure*) and other is webserver access logs. I have extracted all connecting hosts information from these places.

Now, I want to know, is there any other way an external host can communicate with the linux box i.e. apart from ssh2 and webserver access connections? If yes, I would like to know the way and the corresponding log to extract that host information.

Please help with this if you can. I just need information on all hosts connecting to my linux box by any means.

Many Thanks.

Old 11-02-2014, 09:13 AM   #2
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Any means? Does ARP count? email? serial? speaker? NTP? telnet? IPP?
Old 11-02-2014, 09:39 AM   #3
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Thanks for the revert. Yes, preferably any mode of connection esp true for telnet, ftp.
Just need to know where is the logging done for these connections.

Old 11-13-2014, 08:18 AM   #4
Registered: Jan 2014
Location: Farnborough, Hampshire - UK
Distribution: Previously 2 * Fedora 18 Servers -> 2 * CentOS 6.7 + random distro testing
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I know this is a few days old but thought I would add some input.

As you know, typically log files are stored in
- some programs depending on their configuration will store log files either within a sub-folder of
or perhaps a different location altogether.

I run 2 separate Centos servers:

1. Apache Web Server -
, Sendmail & Dovecot Mail Server -
2.PureFTP FTP Server -
Again as mentioned, the log entries depends on the type of connection - i.e. the type of service being run and the specific program concerned.




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