Re: [LARTC] routing

Linux Advanced Routing and Traffic Control

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On Mon, Dec 24, 2001 at 10:58:14PM -0600, Daniel Wittenberg wrote:

> So I can change the out-going route by using:
> echo "100 link1" >> /etc/iproute2/rt_tables
> ip rule add from 172.16.1.0/24 table link1
> ip rule add from 172.16.2.0/24 table link1
> ip route add default via 1.1.1.1 dev $EXTERNAL_INTERFACE table link1
> 
> echo "200 link2" >> /etc/iproute2/rt_tables
> ip rule add from 172.16.3.0/24 table link2
> ip rule add from 172.16.4.0/24 table link2
> ip rule add from 172.16.5.0/24 table link2
> ip route add default via 2.2.2.2 dev $EXTERNAL_INTERFACE table link2

Looks good.

> and if I understand this correctly, this doesn't change anything in
> iptables, so I can still this at the end of my firewall script.  I'll
> also want to use SNAT and change the out-going IP's so they come back on
> the correct link.  Look good?  I can't test this in production very
> often, so before I do I thought I'd run it by everyone since I'm very
> much a newbie on tc...

We use a combination of SNAT/DNAT, MASQ, CBQ, iptables AND Policy routing in
production, and it all works fine.

Regards,

bert

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