SHOREWALL-TCINTERFA(5)SHOREWALL-TCINTERFA(5)NAME
tcinterfaces - Shorewall file
SYNOPSIS
/etc/shorewall/tcinterfaces
DESCRIPTION
This file lists the interfaces that are subject to simple traffic
shaping. Simple traffic shaping is enabled by setting TC_ENABLED=Simple
in shorewall.conf[1](5).
A note on the bandwidth definition used in this file:
· don´t use a space between the integer value and the unit: 30kbit is
valid while 30 kbit is not.
· you can use one of the following units:
kbps
Kilobytes per second.
mbps
Megabytes per second.
kbit
Kilobits per second.
mbit
Megabits per second.
bps or number
Bytes per second.
· Only whole integers are allowed.
The columns in the file are as follows.
INTERFACE
The logical name of an interface. If you run both IPv4 and IPv6
Shorewall firewalls, a given interface should only be listed in one
of the two configurations.
TYPE - [external|internal]
Optional. If given specifies whether the interface is external
(facing toward the Internet) or internal (facing toward a local
network) and enables SFQ flow classification.
Note
Simple traffic shaping is only useful on interfaces where queuing
occurs. As a consequence, internal interfaces seldom benefit from
simple traffic shaping. VPN interfaces are an exception because the
encapsulated packets are later transferred over a slower external
link.
IN-BANDWIDTH - [rate]
Optional. If specified, enables ingress policing on the interface.
If incoming traffic exceeds the given rate, received packets are
dropped randomly. With some DSL and Cable links, large queues can
build up in the ISP´s gateway router. While this insures maximum
throughput, it kills interactive response time. By setting
IN-BANDWIDTH, you can eliminate these queues.
To pick an appropriate setting, we recommend that you start by
setting it significantly below your measured download bandwidth
(20% or so). While downloading, measure the ping response time from
the firewall to the upstream router as you gradually increase the
setting.The optimal setting is at the point beyond which the ping
time increases sharply as you increase the setting.
FILES
/etc/shorewall/tcinterfaces.
SEE ALSOshorewall(8), shorewall-accounting(5), shorewall-actions(5),
shorewall-blacklist(5), shorewall-hosts(5), shorewall-interfaces(5),
shorewall-ipsec(5), shorewall-maclist(5), shorewall-masq(5),
shorewall-nat(5), shorewall-netmap(5), shorewall-params(5),
shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5),
shorewall-route_rules(5), shorewall-routestopped(5),
shorewall-rules(5), shorewall.conf(5), shorewall-tcpri(5),
shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5),
shorewall-zones(5)NOTES
1. shorewall.conf
shorewall.conf.html
05/07/2010 SHOREWALL-TCINTERFA(5)
