On Thu, 11 Aug 2011, Jan Engelhardt wrote: > On Thursday 2011-08-11 12:12, Jozsef Kadlecsik wrote: > >> Packets are > >> being matched as INVALID when we would expect them to be ESTABLISHED. > >> We are running on kernel 2.6.30.5 on X86_64 with CentOS 5.4 and > >> iptables-1.3.5-5.3.el5_4.1. > >> [...] > >> Aug 11 03:29:19 fw01 kernel: FORWARD INVALID IN=bond1 OUT=bond4 > >> SRC=172.x.y.73 DST=172.x.z.34 LEN=52 TOS=0x00 PREC=0x00 TTL=63 ID=32940 > >> DF PROTO=TCP SPT=8080 DPT=52999 WINDOW=34 RES=0x00 ACK FIN URGP=0 > > > >Those are, with high probabilty, late FIN packets: the belonging conntrack > >entry has already been deleted and thus conntrack cannot find the matching > >stream, therefore it sets as INVALID. > > Should not FIN retransmissions ideally be classified as ESTABLISHED (or > perhaps a new state) as long as the final ACK has not been seen? The final ACK might have already been seen. A full tcpdump could tell us what happened exactly. Best regards, Jozsef - E-mail : kadlec@xxxxxxxxxxxxxxxxx, kadlec@xxxxxxxxxxxx PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt Address : KFKI Research Institute for Particle and Nuclear Physics H-1525 Budapest 114, POB. 49, Hungary -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
