I'm trying to run Limewire inside of a small network (not LAN).

1) I have installed webcache on server (e.g. server1.network.org)
2) I changed the list of servers in file com.limegroup.gnutella.bootstrap.DefaultBootstrapS ervers so that ther is only one webcache there (server1.network.org)
3) I'm trying to run 2-3 clients, one of them is for sure open for connections.

Problem is that clients are always DISCONNECTED so I can do nothing

Question is how can I run Limewire in small network with one webcache and 3-20 clients ?

Thanks in advance

Networks is definitely not my area. But you obviously have them routed off somehow. It sounds to me like you will need to both configure their firewalls & do port forwarding for each individual computer. From my knowledge that means you would need to forward a separate port number for each computer. ie: Port 6346 for one & other numbers for each of the others. (I might be wrong here, but ... until we know more.)

Firewall instructions: http://www.limewire.com/english/content/firewalls.shtml

We really do need some more details to help you further such as what firewalls, which OS versions, what connection type, what modem-router brand name(s) & model number(s)?