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Default Gateway Swaps

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Default Gateway Swaps - 18.Oct.2004 5:08:00 AM   
mb7387

 

Posts: 13
Joined: 18.Oct.2004
From: Mobile, AL
Status: offline
I'm having an issue with my ISA 2004 Server. I'm using it as a firewall with a 192.x interface (external) and a 10.x.(internal). The issue I have is that my default gateway (>route print)changes to my internal network whenever it feels like it. It might be two days or 5 minutes. I have to disable the card for a few minutes and then re-enable it for my external interface come back as the default gateway. Is there a way I can lock in my default gateway in a multi-homed system? Any ideas are welcome.

Mike-b
Post #: 1
RE: Default Gateway Swaps - 18.Oct.2004 2:06:00 PM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi Mike,

What are the details of your ISA firewall's interface configuration?

What is the definition of your ISA firewall's default Internal network?

Thanks!
Tom

(in reply to mb7387)
Post #: 2
RE: Default Gateway Swaps - 18.Oct.2004 3:04:00 PM   
awj

 

Posts: 107
Joined: 26.Feb.2004
From: UK
Status: offline
Is your internal Network card getting its ip address by DHCP? If so is it also getting a DG setting at that time?

If it is getting them from a DHCP server change it so all settings are static.

(in reply to mb7387)
Post #: 3
RE: Default Gateway Swaps - 19.Oct.2004 2:24:00 AM   
mb7387

 

Posts: 13
Joined: 18.Oct.2004
From: Mobile, AL
Status: offline
Member #11
Here's the details for eveything I can think of. I've set up ISA behind a cable modem router on a network of 192.168.0.xxx. I have my ISA server with a NIC pointing to my router Gateway 192.168.0.1. I have my external NIC statically configured. My internal card is 10.10.10.1. Everything works fine when the routes are straight. I've done a fresh install and used this article http://www.isaserver.org/articles/isa2004beta2.html to set it up. The only thing I had to do was add the localhost to the internal NIC so I could get internet access.

(in reply to mb7387)
Post #: 4

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