Cleo LexiCom: Internet Requirements
The computer that will run LexiCom must have a persistent or dial-up
connection to the Internet. This computer must have a dedicated external
IP address associated with it (directly on the computer or via NAT). You
must be prepared to open the appropriate IP addresses and ports on your
firewall and/or proxy server to allow the necessary traffic to be transmitted
to and from your trading partner.

