NAME

       sanewall-dscp - set the DSCP field in the packet header

SYNOPSIS

       dscp {value | class classid} chain [rule-params]

DESCRIPTION

       The dscp helper command sets the DSCP field in the header of packets traffic, to allow QoS
       shaping.

           Note
           There is also a dscp parameter which allows matching DSCP values within individual
           rules (see optional rule parameters: sanewall-rule-params(5)).

       Set value to a decimal or hexadecimal (0xnn) number to set an explicit DSCP value or use
       classclassid to use an iptables DiffServ class, such as EF, BE, CSxx or AFxx (see iptables
       -j DSCP --help for more information).

       The chain will be used to find traffic to mark. It can be any of the iptables built in
       chains belonging to the mangle table. The chain names are: INPUT, FORWARD, OUTPUT,
       PREROUTING and POSTROUTING. The names are case-sensitive.

       The rule-params define a set of rule parameters to match the traffic that is to be marked
       within the chosen chain. See optional rule parameters: sanewall-rule-params(5) for more
       details.

       Any dscp commands will affect all traffic matched. They must be declared before the first
       router or interface.

EXAMPLES

           # set DSCP field to 32, packets sent by the local machine
           dscp 32 OUTPUT

           # set DSCP field to 32 (hex 20), packets routed by the local machine
           dscp 0x20 FORWARD

           # set DSCP to DiffServ class EF, packets routed by the local machine
           #              and destined for port TCP/25 of 198.51.100.1
           dscp class EF FORWARD proto tcp dport 25 dst 198.51.100.1

SEE ALSO

           Sanewall program: sanewall(1)
           Sanewall configuration: sanewall.conf(5)
           administration tool for IPv4 firewalls: iptables(8)
           show / manipulate routing, devices, policy routing and tunnels: ip(8)
           Linux Advanced Routing & Traffic Control HOWTO[1]
           optional rule parameters: sanewall-rule-params(5)

AUTHOR

       Sanewall Team

COPYRIGHT

       Copyright © 2012, 2013 Phil Whineray <phil@sanewall.org>

NOTES

        1. Linux Advanced Routing & Traffic Control HOWTO
           http://www.lartc.org/lartc.html