I have a simple INPUT rule for iptables that logs any new connections to a logfile.
--log-ip-options flags are both set and I get the appropriate
One line of my log looks something like this:
Nov 29 17:00:00 IN=venet0 OUT= MAC= SRC=x.x.x.x DST=x.x.x.x LEN=64 TOS=0x00 PREC=0x00 TTL=53 ID=37898 DF PROTO=TCP SPT=57755 DPT=8888 WINDOW=65535 RES=0x00 SYN URGP=0 OPT (0204057D010303010101080A3E521D4D0000000004020000)
I would like to understand how to interpret the
OPT string (bold).
- Is there some documentation available on what it actually means?
- How could I make it human-readable?