NAME
providers - Shorewall Providers file
SYNOPSIS
/etc/shorewall/providers \kx
DESCRIPTION
This file is used to define additional routing tables. You will want
to define an additional table if:
You have connections to more than one ISP or multiple
connections to the same ISP
You run Squid as a transparent proxy on a host other than the
firewall.
You have other requirements for policy routing.
Each entry in the file defines a single routing table.
If you wish to omit a column entry but want to include an entry in
the next column, use "-" for the omitted entry.
The columns in the file are as follows.
NAME name
The provider name. Must be a valid shell
variable name. The names 'local', 'main', 'default' and 'unspec' are
reserved and may not be used as provider names.
NUMBER number
The provider number -- a number between 1 and 15. Each
provider must be assigned a unique value.
MARK value
A FWMARK value used in your shorewall-tcrules(5) file to
direct packets to this provider.
If HIGH_ROUTE_MARKS=Yes in shorewall.conf(5), then the value
must be a multiple of 256 between 256 and 65280 or their hexadecimal
equivalents (0x0100 and 0xff00 with the low-order byte of the value
being zero). Otherwise, the value must be between 1 and 255. Each
provider must be assigned a unique mark value.
DUPLICATE routing-table-name
The name of an existing table to duplicate to create this
routing table. May be main or the name of a
previously listed provider. You may select only certain entries from
the table to copy by using the COPY column below.
INTERFACE interface
The name of the network interface to the provider. Must be
listed in shorewall-interfaces(5).
Caution
The Shorewall implementation of Multi-ISP support assumes
that each provider has its own interface.
GATEWAY - {-|address|detect}
The IP address of the provider's gateway router.
You can enter "detect" here and Shorewall will attempt to
detect the gateway automatically.
For PPP devices, you may omit this column.
OPTIONS (Optional) [-|option[,option]...]
A comma-separated list selected from the following. The order
of the options is not significant but the list may contain no
embedded whitespace.
track
If specified, inbound connections on this interface are
to be tracked so that responses may be routed back out this
same interface.
You want to specify track if internet
hosts will be connecting to local servers through this
provider.
balance[=weight]
The providers that have balance
specified will get outbound traffic load-balanced among them.
By default, all interfaces with balance
specified will have the same weight (1). You can change the
weight of an interface by specifiying
balance=weight
where weight is the weight of the
route out of this interface.
loose
Shorewall normally adds a routing rule for each IP
address on an interface which forces traffic whose source is
that IP address to be sent using the routing table for that
interface. Setting loose prevents creation of
such rules on this interface.
optional
If the interface named in the INTERFACE column is not up
and configured with an IPv4 address then ignore this
provider.
COPY [{none|interface[,interface]...}]
A comma-separated list of other interfaces on your firewall.
Usually used only when DUPLICATE is main. Only copy
routes through INTERFACE and through interfaces listed here. If you
only wish to copy routes through INTERFACE, enter
none here.
EXAMPLES
Example 1:
You run squid in your DMZ on IP address 192.168.2.99. Your DMZ
interface is eth2
#NAME NUMBER MARK DUPLICATE INTERFACE GATEWAY OPTIONS
Squid 1 1 - eth2 192.168.2.99 -
Example 2:
eth0 connects to ISP 1. The IP address of eth0 is
206.124.146.176 and the ISP's gateway router has IP address
206.124.146.254.
eth1 connects to ISP 2. The IP address of eth1 is
130.252.99.27 and the ISP's gateway router has IP address
130.252.99.254.
eth2 connects to a local network.
#NAME NUMBER MARK DUPLICATE INTERFACE GATEWAY OPTIONS COPY
ISP1 1 1 main eth0 206.124.146.254 track,balance eth2
ISP2 2 2 main eth1 130.252.99.254 track,balance eth2
FILES
/etc/shorewall/providers
SEE ALSO
http://shorewall.net/MultiISP.html
shorewall(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-proxyarp(5), shorewall-route_routes(5),
shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
shorewall-tcclasses(5), shorewall-tcdevices(5), shorewall-tcrules(5),
shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)
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