iptables log analysis

m.w.chang mwchang
Mon May 17 11:37:55 PDT 2004


I just need example to get started. my perl is really weak despite of my 
agiility in foxpro and c.

Sep 20 19:51:44 server kernel: iptables IN=ppp0 OUT= MAC=
SRC=64.4.13.202 DST=218.102.112.235 LEN=40 TOS=0x00 PREC=0x00 TTL=119 
ID=17967 PROTO=TCP SPT=1863 DPT=3018 WINDOW=16821 RES=0x00 ACK FIN RGP=0

that's one sample entry. I will proces the line with "DPT=" and then 
plot number of hits vs port number. that's more useful and interesting 
than browing the whole log file.


>> # chkhit /var/log/messages
>> port,hits
>> 25,10
>> 139,1
>> 6112,20
>> #
> I have a few that probably just need modification for your purposes.

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