[LARTC]MASQed network to exit on different ext IP addres

[Jorge Sanchez]

Hi,
i have a following problem. Looks like this

   ROUTER   
--DEF.GWa  aaa.aaa.aaa.aaa 
  
|DEF.GWb bbb.bbb.bbb.bbb

  |
   --- 
|  
|  
 VLAN0015ETH0-   
xxx.xxx.xxx.xxx
 10.0.0.0/24(alias on eth0) --  
 fff.fff.fff.fff.fff


i need that all traffic from subnet 10.0.0.0/24 goes out masqueraded 
with ip address of alias on eth0 (fff.fff.fff.fff)
and have default gw bbb.bbb.bbb.bbb  . There is obsolote kernel 2.2.25 
and iproute ver. iproute2-ss991023 with ipchains version

ipchains 1.3.8, 27-Oct-1998

I tried folowing

/usr/sbin/ip rule add prio 100 dev vlan0015 lookup 15 (here i tried also 
to do prio 100 from 10.0.0.0/24 lookup 15 )
/usr/sbin/ip route add default via bbb.bbb.bbb.bbb table 15   (here i 
tried to add src fff.fff.fff.fff, but no effect)

/usr/sbin/ip route flush cache
ipchains -A fwdmasq -i vlan+ -j MASQ
ipchains -A forward -j fwdmasq -s 10.0.0.0/24

i tried also source nat with the iproute but no way,
/usr/sbin/ip rule add prio 100 from 10.0.0.0/24 nat fff.fff.fff.fff 
lookup 15


The problem is that packets are still leaving router with ip addres 
xxx.xxx.xxx.xxx instead of fff.fff.fff.fff.



thanks a lot
Jorge Sanchez
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[LARTC] general shaping rules

[Jorge Sanchez]

Hi,
i dont fully understand this sentence, could someone be so kind to 
expleain me it?


Any router performing a shaping function should be the bottleneck on the 
link, and should be shaping slightly below the maximum available link 
bandwidth. This prevents queues from forming in other routers, affording 
maximum control of packet latency/deferral to the shaping device.

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