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Server publishing, two external nics, single gateway

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Server publishing, two external nics, single gateway - 7.Nov.2004 1:03:00 AM

orangy

Posts: 17
Joined: 2.May2004
Status: offline

It seems I miss something in tcp, or routing, or ISA, or how all this works, but I have a problem.

I have three NICs in W2K3 server and ISA 2004 installed. One is LAN and works perfectly. One is for Internet access and allows outbound connections just fine, e.g. all connections to Internet works fine.

The problem is third NIC, which is used for server publishing. The reason to have it is just migrating from one ISP to another, and probably later fail-over connection using 3rd-party software. But for now I have to configure server publishing through it.

So I have IP1 on one external NIC (default gateway) and IP2 on the secondary external NIC. DNS is configured to provide IP2 for MX record, server publishing is configured on ISA (bound to all ip addresses on external network) and it doesn't work.

If I disable IP1 interface and restore default gateway on IP2 all works fine. What am I doing wrong?

Post #: 1

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RE: Server publishing, two external nics, single gateway - 7.Nov.2004 2:34:00 AM

Ara.A

Posts: 259
Joined: 21.Oct.2004
Status: offline

Are 2 external nic coming from different isp�s at the moment or from same isp? You have to have default gateway on both based on isp settings. Can you give more info about your ip numbers? Dns, gateway ,,,,
Just last 3 octet should be fine

(in reply to orangy)

Post #: 2

RE: Server publishing, two external nics, single gateway - 7.Nov.2004 3:01:00 AM

orangy

Posts: 17
Joined: 2.May2004
Status: offline

2 nics are from different ISPs.
2 default gateways are not supported in ISA 200*, AFAIK. Also, I want all outbound trafic to go to single NIC, and secondary to use only for some published servers.

Though I tried two default gateways, but it won't work. I tuned gateway metrics, so that one (if available) is choosen over the other. No luck...

(in reply to orangy)

Post #: 3