Following the ip address is the port number separated by a colon. If the port number is not supplied 1352 is used as the default
Anything following the ip address ( ",0" or whatever) does nothing and means nothing. The parser ignores this text.
Note that starting with Domino 6.* with the support of IPV6 addresses, the IP address can be enclosed in square brackets []. This is required, since the syntax of an IPV6 address can itself contain colons.