tc-fw(8) - phpMan

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Firewall mark classifier in tc(8)    Linux   Firewall mark classifier in tc(8)



NAME
       fw - fwmark traffic control filter

SYNOPSIS
       tc filter ... fw [ classid CLASSID ] [ action ACTION_SPEC ]

DESCRIPTION
       the  fw filter allows to classify packets based on a previously set fwmark by ipta-
       bles.  If it is identical to the filter's handle,  the  filter  matches.   iptables
       allows to mark single packets with the MARK target, or whole connections using CON-
       NMARK.  The benefit of using this filter instead of doing the heavy-lifting with tc
       itself  is  that  on  one  hand it might be convenient to keep packet filtering and
       classification in one place, possibly having to match a packet just  once,  and  on
       the other users familiar with iptables but not tc will have a less hard time adding
       QoS to their setups.

OPTIONS
       classid CLASSID
              Push matching packets to the class identified by CLASSID.

       action ACTION_SPEC
              Apply an action from the generic actions framework on matching packets.

EXAMPLES
       Take e.g. the following tc filter statement:

              tc filter add ... handle 6 fw classid 1:1

       will match if the packet's fwmark value is 6.  This is a sample iptables  statement
       marking packets coming in on eth0:

              iptables -t mangle -A PREROUTING -i eth0 -j MARK --set-mark 6

SEE ALSO
       tc(8), iptables(8), iptables-extensions(8)



iproute2                          21 Oct 2015Firewall mark classifier in tc(8)

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