Directing traffic with 2 NICs 2 ISPs

June 28, 2009 at 05:59:42
Specs: Windows XP Pro SP3, P4 1.8Ghz / 1GB RAM
Hi there,

I was wondering if anybody could point me in the right direction for what I am trying to do. The scenario is as follows:

1 LAN (2 subnets: 192.168.150.x & 192.168.151.x)
2 ISP (1 providing a dynamic public public IP & the other providing a static public IP)

2 routers (a Lancom router connected to ISP A - dynamic IP on subnet 192.168.150.x & a Pirelli router connected to ISP B static IP on subnet 192.168.151.x)

All the stations on the network are interconnected via the Lancon router and subnet 150.x They all connect to the Internet via ISP A on a dynamic public IP

There is one station (Windows XP) that has 2 NIC cards connected. What I would like to do is be able to see all workstations on the subnet 150.x however ONLY use Internet access from the 2nd router (Pirelli) on subnet 151.x which provides a static IP

Is there anyway to accomplish this?

Kind regards

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June 28, 2009 at 06:21:48
Just make sure the Gateway address points to the router you want to use.


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June 28, 2009 at 16:01:04
Each NIC is being assigned a different IP address from a
different router which exist on different subnets. You mention
setting the Gateway address to point to the router I would like
to use.

If both NICs are being assigned IPs automatically where would
I be able to set the Gateway address (windows xp)?

Will my NIC card that is on subnet 150.x be able to find the
Gateway that is accessible via the 2nd NIC card on subnet

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June 29, 2009 at 09:04:25
Q1 you would do a static assignment since you don't have that control with dhcp.

Q2 you can't use ICS so bridging is your only option.

To do this correctly you should put in a router not a workstation.

Ideally you would put in a two wan port router [one pointed to each ISP] and only have one ip subnet for the lan.

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