The problem: I need to reconfigure this LAN. I am a PC tech with modest networking skills and this task has fallen to me. Its success will change things for me.
I inherited: 35 nodes in main offc. and four branch offices of 2 to 10 nodes connecting through Internet to 2 Dsl routers at the main office. The routers are economy Netgear and used mostly as NAT boxes. Two routers were used on separate ip's to allow mapping of two different telnet conections: One, to a local ip of 192.168.1.10 and the second to 192.168.1.3. The routers are connected on the wan side to a switch which is uplinked to the DSL modem. Also inherited were 4 new 3COM office connect 25 user firewalls with vpn upgrades still in new boxes. I have an PII class NT4.0 Domain Controller with service pack 5, a 2000 Email server running Exchange 5.5 . I have tried installing one of the 3COMs parallel to the two existing firewalls but have had difficulties accessing the 3COM. It is web browsable but not reliably in this config. As the sole router it is fine but not with these other two. My hope was to use the four 3COM firewalls and add one additional router to build a VPN. I need help with the plan of the best way to attack this problem without taking the network down for more than just an hour or so.
Whew! I don't ask for much do I?