Good suggestion. Tried just tried that. Traffic gets logged, but the mark is not set. E.g. (from dump) Feb 22 12:50:52 tomcat kernel: IN= OUT=eth0 SRC=66.93.87.2 DST=192.168.1.7 LEN=1500 TOS=0x00 PREC=0x20 TTL=54 ID=4397 DF PROTO=TCP SPT=80 DPT=4322 WINDOW=17520 RES=0x00 ACK URGP=0 Feb 22 12:50:52 tomcat kernel: IN=eth0 OUT=eth1 SRC=192.168.1.7 DST=66.93.87.2 LEN=40 TOS=0x00 PREC=0x00 TTL=127 ID=18031 DF PROTO=TCP SPT=4322 DPT=80 WINDOW=64240 RES=0x00 ACK URGP=0 Feb 22 12:50:52 tomcat kernel: IN= OUT=eth0 SRC=66.93.87.2 DST=192.168.1.7 LEN=1500 TOS=0x00 PREC=0x20 TTL=54 ID=4398 DF PROTO=TCP SPT=80 DPT=4322 WINDOW=17520 RES=0x00 ACK URGP=0 Notice all the TOS is still 0x00. I am setting marks to 3 or 4 depending on traffic type. Casey ----- "Rob Sterenborg" <rob@xxxxxxxxxxxxxxx> wrote: > > How can I detemine whether or not a iptables set-mark operation > > is working? iptables -t mangle -nvL shows packets matching the > > rules with the set-mark. However, with a tcpdump -vvv -i > > <interface> > > I can not see the mark. I am looking at the tos field, and I > > don't see a tos field matching the marks I am trying to set. > > Did you try to match the mark in a subsequent rule and LOG the packet > when the rule hits? > See also man iptables: > > mark > This module matches the netfilter mark field associated with a packet > (which can be set using the MARK target below). > --mark value[/mask] Matches packets with the given unsigned mark value > (if a mask is specified, this is logically ANDed with the mask before > the comparison). > > > Grts, > Rob > > > - > 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 - 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
