On Fri, 2008-02-22 at 14:40 -0800, Casey Scott wrote: > Ultimately, I am trying to mark packets for a tc filter. Should I > not be using the iptables set-mark to do that? I think set-mark is fine for that. I suggest marking some packets in the prerouting chain and then logging them in input chain. Something like the following: $iptables --table mangle --append PREROUTING --in-interface $in_interface --destination $host --jump MARK --set-mark $mark_integer $iptables --table filter --append INPUT --in-interface $in_interface --match mark --mark $mark_integer --jump LOG > > ----- "Matt Zagrabelny" <mzagrabe@xxxxxxxxx> wrote: > > > On Fri, 2008-02-22 at 12:53 -0800, Casey Scott wrote: > > > 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. > > > > AFAIK, setting TOS is not the same as marking. [goes to check] > > The man page confirms that. > > > > > 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 > > -- > > Matt Zagrabelny - mzagrabe@xxxxxxxxx - (218) 726 8844 > > University of Minnesota Duluth > > Information Technology Systems & Services > > PGP key 1024D/84E22DA2 2005-11-07 > > Fingerprint: 78F9 18B3 EF58 56F5 FC85 C5CA 53E7 887F 84E2 2DA2 > > > > He is not a fool who gives up what he cannot keep to gain what he > > cannot > > lose. > > -Jim Elliot > - > 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 -- Matt Zagrabelny - mzagrabe@xxxxxxxxx - (218) 726 8844 University of Minnesota Duluth Information Technology Systems & Services PGP key 1024D/84E22DA2 2005-11-07 Fingerprint: 78F9 18B3 EF58 56F5 FC85 C5CA 53E7 887F 84E2 2DA2 He is not a fool who gives up what he cannot keep to gain what he cannot lose. -Jim Elliot
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