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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | COLOPHON |
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Firewall mark classifier in tc(8) Linux Firewall mark classifier in tc(8)
fw - fwmark traffic control filter
tc filter ... fw [ classid CLASSID ] [ action ACTION_SPEC ]
the fw filter allows to classify packets based on a previously set
fwmark by iptables. 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 CONNMARK. 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.
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.
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 ipta‐
bles statement marking packets coming in on eth0:
iptables -t mangle -A PREROUTING -i eth0 -j MARK --set-mark 6
tc(8), iptables(8), iptables-extensions(8)
This page is part of the iproute2 (utilities for controlling TCP/IP
networking and traffic) project. Information about the project can
be found at
⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
If you have a bug report for this manual page, send it to
netdev@vger.kernel.org, shemminger@osdl.org. This page was obtained
from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
2020-09-18. (At that time, the date of the most recent commit that
was found in the repository was 2020-09-14.) If you discover any
rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
iproute2 21 Oct 2015Firewall mark classifier in tc(8)
Pages that refer to this page: tc(8)
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