IP/IPX firewall

[Matt Holdrege <matt @ hsa . com>]

I'm looking for a firewall that would allow only certain IP and IPX 
addresses to access a LAN. At least one of the interfaces on the Firewall 
need to be Token Ring. The other could be Token Ring or Ethernet. Does such 
a beast exist?

If not, is there an authentication tool that will run on AIX that will 
authenticate IP and IPX logins?

TIA,

Matt Holdrege     matt @
 hsa .
 com