Gateway load balance

Raul I. Becette raulbecette at
Thu Jun 18 17:41:12 UTC 2009

>> I had a proxy server (Squid + Dansguardian) under Slackware on the 
>> LAN which, via 'ip route' I make it use 3 gateways connected each one 
>> to an ADSL line and balance the requests.
>> Unfortunately my server crashed and I took the oportunity to install 
>> a new one under FreeBSD 7.0-RELEASE. Squid and Dansguardian are 
>> working fine. My problem is that I don't know how to make the server 
>> use the other 2 gateways I have left and balance the requests on all 
>> ADSL lines.
> use ipfw and fwd command.
> for example with output section
> add 10000 fwd gw1_IP from DSL1_subnet to any via gw1_ethernet
> add 10001 fwd gw2_IP from DSL2_subnet to any via gw2_ethernet
> add 10002 fwd gw3_IP from DSL3_subnet to any via gw3_ethernet

for my scenario I asume gwX_IP the IP address of my dsl gateways. What 
would be DSLX_subnet and gwX_ethernet?
The proxy has only 1 NIC. Just to be sure: gateway_enable="YES" must be 
set in /rtc.rc.conf and the kernel must be recompiled with ip forwarding 

> please do treat above as an example of course.
> Of course use right squid commands so it will select right source IP 
> based on the rules you want, but as you already did id under linux i 
> assume you have this practiced already.

Under Linux I didn't used squid commands to do the balancing. Only 
defining the 3 gateways with ip route command.
Is it possible to do the same with ipfw as you mentioned above?

> i had 5+2 Polish Telecom links connected to one server - worked fine.
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