My problem was I wanted to add a security appliance (Panda Gate Defender) to our network, but have it cover two access lines, one T1 and one DSL. The DSL ports our POP3 email and this T1 serves a couple small domains totaling 115 work stations. We are all 2003 Standard server and XP Pro based.
We are suffering from occassional slow throughput of DSL line, and now having both lines go completely down requiring router restarts. This seems to be occurring at high volume times, easrly morning, lunch and end of work day (well everyone but me!)
Here is the layout:
DSL Modem Full T1 CSU
FW Routers FW Routers
The security appliance serves multiple roles, one main one for filtering email going and coming from DSL, and one as web content filtering coming from T1.
Public addressing stops at WAN side of FW Routers.