RE: External Interface & Multiple IPs
- From: "Chris Burns SRM" <burnsc@xxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 20 Jun 2002 14:16:40 -0400
I'm fairly new to ISA, about 6-9 monhs now with fair success, so I'm not
compleatly sure on the following. So this is the thought I'm having,
wouldn't you be better served if you used one nic for you server/servers and
the other to control your other internet access needs? I'm thinking the
general server items such as web and email on one address and then setup the
other to support your web browsing and maybe run FTP, VPN, ... what have
that might require login/password control for access to/from your location?
As to whether you can publish a server to both nics, I don't see why not,
I'm not sure I understand why you'd want to, besides the possable redunant
line access to your server in the event one of your ISP's is down.
----- Original Message -----
From: "Reed, Russ" <Russ.Reed@xxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Thursday, June 20, 2002 2:04 PM
Subject: [isalist] RE: External Interface & Multiple IPs
http://www.ISAserver.org
I want to have one ISP on 1 external interface and another ISP on the 2nd
external interface. Since I will have 2 public address (one on each
interface). I will then publish the same internal server on both public
addresses. Sound reasonable?
-----Original Message-----
From: Chris Burns SRM [mailto:burnsc@xxxxxxxxxx]
Sent: Thursday, June 20, 2002 1:00 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: External Interface & Multiple IPs
http://www.ISAserver.org
Ok, riddle me this then. You can have an external, and internal and a dmz
all with thier own nic's. Isn't the DMZ considered external to the ISA? I
don't really know th eanswer, but do believe I've seen many postings of
people who've done multi-external nics. I presently only have one external,
but have four external IP's assignned to it, and all are doing as thier
supposed to do.
----- Original Message -----
From: "Paul Lemonidis (Hotmail)" <paul_lemonidis@xxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Thursday, June 20, 2002 1:46 PM
Subject: [isalist] RE: External Interface & Multiple IPs
> http://www.ISAserver.org
>
>
> 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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