[LARTC] mark & owner for local connections

[LARTC] mark & owner for local connections

[rm]

Hi,

Host A has two interfaces: eth0, tap0.
I want that all locally generated traffic from user 1004 goes through
tap0.

This is what I did:

iptables -A OUTPUT -t mangle -m owner --uid-owner 1004 -j MARK --set-mark 2
echo 202        bigmac.out >> /etc/iproute2/rt_tables
ip rule add fwmark 2 table  bigmac.out
ip route add default via 10.0.0.1 dev tap0 table bigmac.out
ip route flush cache

This results in these problems:
- packets from 1004 are send out via tap0 but with source ip of eth0.
  (seen in tcpdump -n -i tap0)
- iptables packetfilter rules have to bet set on eth0 and not on tap0.
  (if i deny everything on -o eth0 no packet is send out to -o tap0 anymore..)


Ideas?


Ralf
rm@ingsoc.org


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Re: [LARTC] mark & owner for local connections

[Alexander Samad]

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On Fri, Oct 15, 2004 at 11:05:41AM +0000, rm@ingsoc.org wrote:
> Hi,
> 
> Host A has two interfaces: eth0, tap0.
> I want that all locally generated traffic from user 1004 goes through
> tap0.
> 
> This is what I did:
> 
> iptables -A OUTPUT -t mangle -m owner --uid-owner 1004 -j MARK --set-mark 2
> echo 202        bigmac.out >> /etc/iproute2/rt_tables
> ip rule add fwmark 2 table  bigmac.out
> ip route add default via 10.0.0.1 dev tap0 table bigmac.out

why not change this to 
ip route add default via 10.0.0.1 dev tap0 table bigmac.out src
IPADDRESSofTAP0


> ip route flush cache
> 
> This results in these problems:
> - packets from 1004 are send out via tap0 but with source ip of eth0.
>   (seen in tcpdump -n -i tap0)
> - iptables packetfilter rules have to bet set on eth0 and not on tap0.
>   (if i deny everything on -o eth0 no packet is send out to -o tap0 anymore..)

From my understanding the tap packets go over eth0, you still need to
allow ipip packets (can check with tcpdump)

> 
> 
> Ideas?
> 
> 
> Ralf
> rm@ingsoc.org
> 
> 
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> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
> 

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