I am trying to configure a Cisco router, a pix and a switch for a charity. I have a Win2k3 server running ISA2000 and a web and mail server behind a Cisco router, firewall and switch. The problem is sending email from remote locations.
The cabling is a bit confusing, but I will try to explain it and include a sketch.
The charity just switched from DSL to dual T-1 for voice and data behind this new Cisco equipment. The first T-1 line comes in and splits or separates into two patch cables.
The first patch cord on this first T-1 goes to a Netvanta 3200 (csu/dsu and router???)
From the Netvanta a cable runs to a Pix 501 firewall
From the Pix, a cable runs to a Catalyst ST 3560G switch
From the switch a patch cord runs to each user's Cisco IP phone
From the phone a cable runs to the user's PC
The second cable from this split or separation goes to a Cisco 2800 series router
A second T-1 line comes in and goes directly to the router
There are two Cisco servers for the phones also plugged into the switch
I got the ISA box and IIS and Exchange to work by plugging ISA into the Pix firewall and my Exchange/IIS box into the switch. Outlook and Entourage work on client machines at the site.
I have read that Cisco Pix firewall's don't pass POP3/SMTP traffic under some circumstances, could this be my problem? Can I set up an ACL entry to allow outside users to reach the Exchange box? This ISA/IIS/Exchange combination worked perfectly with the DSL connection and users could send and receive when off site. Can anyone give me some guidance on what to do to allow users to send and receive email when not at the charity?
Attaching a sketch didn't work, so here's a link to sketch of the cabling layout: http://www.thenetpros.net/images/cablingDiagram.gif
The diagram also shows how my DSL was cabled on the right side of the drawing. Again, thanks for any help.