Re: Routing local generted packets with fwmark

[Mitja MiheliÄ <mitja.mihelic@xxxxxxxx>]

On 10/15/2010 08:48 AM, C. L. Martinez wrote:

On Wed, Oct 13, 2010 at 11:22 AM, C. L. Martinez <carlopmart@xxxxxxxxx> wrote:

Hi all,

ÂI need to route local generated packages depending on which tcp or udp service I need to use. To accomplish this I have configured two routing tables:

[root@lothlorien ~]# ip ru ls

0: Â Â Âfrom all lookup 255Â

32762: Âfrom all fwmark 0x2 lookup FirstLanÂ

32763: Âfrom all fwmark 0x1 lookup SecondLanÂ

32764: Âfrom 172.25.80.10 lookup SecondLanÂ

32765: Âfrom 172.25.70.18 lookup FirstLanÂ

32766: Âfrom all lookup mainÂ

32767: Âfrom all lookup default

My routing tables:

[root@lothlorien net]# ip ro show table FirstLan

172.25.70.16/28 dev eth1 Âproto kernel Âscope link Âsrc 172.25.70.18Â

default via 172.25.70.30 dev eth1

[root@lothlorien net]# ip ro show table SecondLan

172.25.80.0/24 dev eth1 Âproto kernel Âscope link Âsrc 172.25.80.10

default via 172.25.80.1 dev eth2

ÂAnd my iptables rule is:

Âiptables -t mangle -A OUTPUT -p udp --dport 53 Â-j MARK --set-mark 1

I had a similar problem, so I wrote the mark as 0x1 :
iptables -t mangle -A OUTPUT -p udp --dport 53 Â-j MARK --set-mark 0x1

--
MM

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