The rule invoked is 1002. Received From: webserver->/var/log/syslog Rule: 1002 fired (level 2) -> "Unknown problem somewhere in the system." Portion of the log(s):
On Friday, May 23, 2014 9:20:03 AM UTC-4, dan (ddpbsd) wrote: > > On Fri, May 23, 2014 at 2:27 AM, Ossec User > <[email protected] <javascript:>> wrote: > > Hello, > > > > My server has been scanned and/or attacked a lot on the iptables lately. > > OSSEC interprets these as a level 2 "unknown error somewhere in the > system." > > Until I figured out what it meant I was very confused. Seems the > iptables > > decoder does not work on my server. If you have a decoder for this I can > add > > it would be much appreciated: > > > > SAMPLE ERROR > > May 23 06:18:22 webserver kernel: iptables denied: IN=eth0 OUT= > > MAC=fe:fd:ad:ff:ed:12:84:78:ac:57:aa:c1:08:00 SRC=93.174.93.51 > > DST=[MY.HOST.IP] LEN=40 TOS=0x08 PREC=0x20 TTL=244 ID=54321 PROTO=TCP > > SPT=39305 DPT=22644 WINDOW=65535 RES=0x00 SYN URGP=0 > > > > > > What confuses me even more however is that OSSEC is dropping/denying my > own > > host server IP as can be seen in the active-responses.log. Is this > normal? I > > didn't think I needed to actually whitelist the server host IP. I > thought > > previously that the internal IP address which was installed there > > automatically was sufficient. On a side note, this doesn't appear to > affect > > my websites or any other function at all. So I'm not sure what is > happening. > > > > SAMPLE FROM ACTIVE-RESPONSES LOG > > Fri May 23 01:43:34 EDT 2014 > /var/ossec/active-response/bin/firewall-drop.sh > > delete - [MY.HOST.IP] 1400823155.116483 20101 > > Fri May 23 02:07:26 EDT 2014 /var/ossec/active-response/bin/host-deny.sh > add > > - [MY.HOST.IP] 1400825246.123855 20101 > > > > This looks like rule 20101 is triggering the block. So the IPTables > stuff and the blocks appear to be unrelated. > > > > > Please advise. Thank you. > > > > > > -- > > > > --- > > You received this message because you are subscribed to the Google > Groups > > "ossec-list" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to [email protected] <javascript:>. > > For more options, visit https://groups.google.com/d/optout. > -- --- You received this message because you are subscribed to the Google Groups "ossec-list" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
