I have an NT server running Proxy 2.0 and exchange 5.5 all the latest SP’s. What type of firewall protection should I have for my internal network so that hackers and sneakers cant gain access through my T1 internet connection. The T1 comes through the NT on a multi-homed system. Do I need a firewall appliance or actual software on the server? What would you guys recomend?
Server is a little taxed but I can upgrade it to dual Pentium III 500 with upto 1Gb ram. 125 Users on the internal network.
