Re: Protocol level routing with ISA and multiple ISPs
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 17 May 2002 13:46:10 -0700
Since you want routing based on source IP, your solution lies more in your
internal routing structure than in what you use for a firewall/proxy server.
How are those IPs directed to which gateway?
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/authors/harrison/
Read the books!
----- Original Message -----
From: "Stephen I. Woolhead" <Stephen.Woolhead@xxxxxxxxxxxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Friday, May 17, 2002 9:45 AM
Subject: [isalist] Re: Protocol level routing with ISA and multiple ISPs
http://www.ISAserver.org
I thought that was going to be the case.
Now, do I buy another ISA server, or do I give Smoothwall GPL a go,
seeing as this is only for outgoing web surfing for about 30 people.
Stephen.
> -----Original Message-----
> From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
> Sent: 17 May 2002 16:57
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Re: Protocol level routing with ISA and multiple
ISPs
>
> http://www.ISAserver.org
>
>
> ISA doesn't support multiple public interfaces.
> All you'll get for your trouble is a log full of "spoofed" packets.
>
> Jim Harrison
> MCP(NT4, W2K), A+, Network+, PCG
> http://isaserver.org/authors/harrison/
> Read the books!
> ----- Original Message -----
> From: "Stephen I. Woolhead" <Stephen.Woolhead@xxxxxxxxxxxxxxxxxxxxxxx>
> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
> Sent: Friday, May 17, 2002 8:35 AM
> Subject: [isalist] Protocol level routing with ISA and multiple ISPs
>
>
> http://www.ISAserver.org
>
>
>
> I have an ISA server with two connections to the internet. The first
is
> a leased line connection with an IP that our domain and MX records
> resolves to, the second is an ADSL connection.
>
> Now what I want to do is set the ISA server up so that that I can have
> our mail and traffic for our web site be routed over the Leased line
and
> every thing else be routed over the ADSL line.
>
> This translates into the following
>
> Our MX records point at an IP address on the Leased Line.
> www.somedomain.com resolves to an IP address on the Leased Line.
>
> ISA has server publishing rules for SMTP and Web publishing rules for
> www.somedomain.com. That takes care of incoming traffic.
>
> For outgoing traffic I want to force traffic from 192.168.1.100 ->
> 192.168.1.150 (the servers doing web and SMTP) to be routed over the
> Leased Line, but traffic from all other address to be sent over the
ADSL
> line.
>
> How do I configure ISA/RRAS to do this?
>
> Can I tell the machine to use a different gateway based on source
> address?
>
> Is doing this by source address going to work if using ISA publishing,
> as the packets will get regenerated with ISA as the source, won't
they?
>
> Is there a way to route by protocol?
>
> Having got the above to work is there a way to get ISA to load balance
> over these two connections, or am I asking too much here?
>
> Stephen.
>
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