On Fri, May 23, 2014 at 11:38 AM, OssecNewb <[email protected]> wrote: > If what you are saying is true, then blocking my own host IP is normal > behavior for OSSEC? Just want to know if there is any concern or if this is > some type of hacker trick to hide what is really happening from the server > itself. I don't remember where I found it. >
I don't have access to your logs, so I cannot determine anything beyond baseless speculation. It could be a bug in a decoder/rule. It could be something nefarious. It could be a misconfiguration. There's no way to tell at this point. > > On Friday, May 23, 2014 2:27:51 AM UTC-4, OssecNewb 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 >> >> >> 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]. > 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.
