Re: Filtering Connect syscalls for af_inet only

Correction. Both filetype=socket and !=socket result in just saddr=0100.. events. Seems like this is not the way to go. Farhan On Tue, Feb 3, 2015 at 6:24 PM, F Rafi <farhanible(a)gmail.com&gt; wrote: > Sorry, I should have mentioned that I already tried that. That results in > no logs being generated for that rule. > > Thanks, > Farhan > > On Tue, Feb 3, 2015 at 6:21 PM, Peter Moody <pmoody(a)google.com&gt; wrote: > >> >> On Tue, Feb 03 2015 at 14:57, F Rafi wrote: >> > Hi folks, >> > >> > <n00b alert> >> > >> > I have auditing for outbound connect requests working using the Connect >> > (sys_connect) syscall on a server running *Ubuntu precise 12.04 LTS*. >> > >> > The rule I'm using is: >> > >> > -a exit,always -F arch=b64 -S connect -k network_outbound >> > >> > >> > >> > I'm getting a substantial amount of saddr=0100.... logs, which I >> understand >> > are not connections to a remote host but rather a local AF_UNIX socket >> > pointing to a file. Example log message is: >> > >> > >> > >> > type=SYSCALL msg=audit(1423002916.796:24545371): arch=c000003e >> syscall=42 >> >> success=no exit=-2 a0=294 a1=7fff97f62680 a2=6e a3=7fff97f62860 >> items=0 >> >> ppid=20546 pid=21439 auid=4294967295 uid=33 gid=33 euid=33 suid=33 >> fsuid=33 >> >> egid=33 sgid=33 fsgid=33 tty=(none) ses=4294967295 comm="apache2" >> >> exe="/usr/lib/apache2/mpm-prefork/apache2" key="network_outbound" >> > >> > type=SOCKADDR msg=audit(1423002916.796:24545371): >> *saddr=0100*<truncated to >> >> remove the hex-encoded file path> >> > >> > >> > Is there an easy way to filter these out so that we only have >> saddr=0200... >> > messages left? >> > >> > I'm exporting the log to an external syslog server and it would help >> > considerably if I could eliminate this from all of our servers. >> > >> > I see that auditctl has a *filetype* filter which can be set to filter >> > *socket* or *file* types. Is that the right way to filter these >> messages? >> > >> > -a exit,always -F arch=b64 -F filetype=socket -S connect -k >> network_outbound >> >> does -F filetype!=socket work? >> >> > The above rule filters out everything but the af_unix connect syscalls, >> > which is the opposite of what I'm looking for. >> > >> > Any help would be appreciated. >> > >> > Thanks, >> > Farhan >> > -- >> > Linux-audit mailing list >> > Linux-audit(a)redhat.com >> > https://www.redhat.com/mailman/listinfo/linux-audit >> > >