Can't See Individual LANS on Router?!?

[bunchman]

We have a WAN set up over a total of 5 LANS. The problem is, at site 1, you cannot see the network at site 2. Each site can only see their domains.
However, all sites communicate over the WAN to access the proxy server, which is alone on a domain.
Using Cisco Routers & Switches along the way..
Site 1: 192.168.10.1 (Router)
Site 2: 192.168.20.1 (Router)
etc..for 5 sites.
The IP Schemes at each site follow, being .2-.254
All subnet masks are 255.255.255.0
What am I missing??!

 

[marks66]

As you mention Domains I assume the servers and clients are NT/Win 98 Microsoft! If you can ping host to host your IP routing will be ok , however are you running a DNS & WINS service as well?
A quick an dirty fix is to use the IP HELPER ADDRESS COMMAND on the LAN interfaces. This will unicast all broadcasts to your remote host.