RE: External Interface & Multiple IPs
- From: "Paul Lemonidis \(Hotmail\)" <paul_lemonidis@xxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 20 Jun 2002 18:46:40 +0100
Hi All
I am not certain but I think you can do the following. You assign 2 IP
addresses to the (one and only) external NIC. Then you can assign 2 IP
addresses to any internal device you wish to publish. You then publish one
internal to one external and the other to the other external. I don't
believe ISA will allow you to publish the same internal IP address to
multiple external addresses? You would need to add both gateways for the
external NIC. I don't believe that will be a problem as the routing
capabilities of the system are clever enough to route the correct traffic to
the correct gateway. If not you would need to manually adjust the W2K
routing table.
If I am mistaken. Many apologies. If anyone knows better then please feel
free to correct\enlighten us.
Regards,
Paul Lemonidis.
----- Original Message -----
From: "Mark Strangways" <strangconst@xxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Thursday, June 20, 2002 6:29 PM
Subject: [isalist] RE: External Interface & Multiple IPs
> http://www.ISAserver.org
>
>
> I was always under the understanding that multiple external interfaces
would
> not be possible.
> I believe that there have been some attempts at it, but not successful.
>
> Mark S.
>
> Correct me if I am wrong Jim / Tom :-)
> ----- Original Message -----
> From: "Reed, Russ" <Russ.Reed@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Thursday, June 20, 2002 1:22 PM
> Subject: [isalist] RE: External Interface & Multiple IPs
>
>
> http://www.ISAserver.org
>
>
> I am reviewing Network Interface Configuration documentation in Tom's
> Book...
>
> On the bottom of page 211 it says...
> "The only interface that should have a default gateway is the external
> interface of the ISA server. If you have multiple external interfaces that
> connect to your ISP(s), you can put in gateways for each of those
> interfaces."
>
> This leads me to believe that you can have multiple external interfaces
> (NICs). Am I misinterpreting this passage?
>
>
> -----Original Message-----
> From: Mark Strangways [mailto:strangconst@xxxxxxxxxx]
> Sent: Thursday, June 20, 2002 12:06 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: External Interface & Multiple IPs
>
>
> http://www.ISAserver.org
>
>
> No, you can't use 2 external NIC's in the ISA.
> ----- Original Message -----
> From: "Reed, Russ" <Russ.Reed@xxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Thursday, June 20, 2002 1:02 PM
> Subject: [isalist] RE: External Interface & Multiple IPs
>
>
> http://www.ISAserver.org
>
>
> Correction: Can you have more than 1 external interface (I know you can
have
> more than 1 IP address).
>
> -----Original Message-----
> From: Reed, Russ
> Sent: Thursday, June 20, 2002 11:15 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] External Interface & Multiple IPs
>
>
> http://www.ISAserver.org
>
>
> If I understand ISA correctly, you can only have 1 external IP address?
>
> Assuming this is true, any suggestions on how I should configure my ISA
> server/network for 2 different IP addresses (with 2 different subnets)?
>
> Background:
> We are a small business with a cable modem as our main internet access (we
> have 4 public address, only using 1). To provide backup internet access,
> we are getting wireless internet access (with 1 public IP address). I need
> to publish servers (the same internal server) on both external IP
> addresses.
>
> Can I do this with ISA?
>
> Russ
>
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