Re: Problem routing packets using fwmark and netfilter

Linux Advanced Routing and Traffic Control

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On Mon, Oct 07, 2002 at 12:28:46PM -0400, Stephane Ouellette wrote:

> MY PROBLEM
> ----------
> 
> Suppose I want to do some policy routing using the fwmark as a routing 
> key. I should have entered the following commands:
> 
> iptables -t mangle -A OUTPUT -o eth0 -p icmp --icmp-type \
> -d $TESTMACHINE1 -j MARK --set-mark 1
> iptables -t mangle -A OUTPUT -o eth1 -p icmp --icmp-type \
> -d $TESTMACHINE2 -j MARK --set-mark 2

I'd remove the '-o' option as you don't know yet where the packets
would be routed to.

Ramin
PS. You forgot the --icmp-type argument. Did your linux box take
these commands?


> ip rule add fwmark 1 table lan1
> ip rule add fwmark 2 table lan2
> 
> Now, pinging $TESTMACHINE1 or $TESTMACHINE2 always uses the same 
> gateway! The iptables rule counters increment as expected but it seems 
> that the fwmark has no effect on routing !!!
> 
> 
> MY CONFIGURATION
> ----------------
> 
> RedHat 7.2 on i686
> Kernel 2.4.20-pre9 (all options related to advanced routing are enabled)
> Today's CVS snapshot of the Netfilter project
> 
> 
> 
> Any suggestion would be greatly appreciated !!!
> 
> Stephane.
> 
> 
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