Re: Filtering Connect syscalls for af_inet only

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