Funk Software Proxy User Manual page 15

If you enter the station name of a host PC on your local network segment (i.e.,
not across a bridge or a router), you don't have to worry about specifying a
network number in order to make a connection.
However, to connect across a router to a host PC on a different network segment,
you must precede the station name with the number of the network on which the
PC may be found. The network number and the station name must be separated
by a colon (:).
For example, to connect to a host PC on IPX network segment 00000028 named
"George's P200," you'd specify:
It is not necessary to supply the leading zeroes of the IPX network number.
If you're not sure of the network number of a Proxy Host, you can find out by
running the Host Control Panel at the host PC; the network and node address will
be shown.
Specifying IPX Addresses
You can also connect to a host workstation by specifying its IPX address. To
indicate that you are specifying an IPX address rather than a station name, prefix
it with the @ symbol; for example:
Note that leading zeros for network number and node number are optional.
16 Proxy: Chapter 2
28:George's P200
@1B3893A1
@28:1B3893A1
Address of node on local segment
Address of node on network segment 28