I am setting up a new install of Exchange Server with a new MailFoundry (like a barracuda) spam appliance.
I am wondering if I should put the email box on a different IP address as my webtraffic? I am given 5 static IP's from our ISP and I'm wondering if I only have 1 incoming connection how can I use more than one WAN IP and can ports be configured to use a different WAN from behind the firewall.
1) Should I use 2 different IPs for mail vs web traffic?
2) Is it possible to set up different WANs from one router/firewall appliance?
3) If I can only have one WAN IP with my router will my spam box be able to differentiate between mail traffic and webtraffic (routing web to the DC/DNS server and mail traffic to the Exchange box)?
P.S. I have a Sonicwall TZ-100 router which is soon to be upgraded to a Cisco ASA 5510. I can upgrade to the ASA if it will "solve" this problem.