help changing port that ftp serves on (instead of 21)



i was wondering how to change the port that ftp serves on, instead of the default of 21. i've found out how to change the port that i connect to other machines w/ ftp using netinfo - but i can't change the port that my machine serves w/.

i've tried to change it using the services (i think, something like that) file in /etc, but that doesn't seem to work.

i need to figure this out cos my isp blocks it's users from serving on port 21....

thanks for any help!


this is from the etc/services file...

# Services Database
# Note that this file is consulted when the system is running in single-user
# mode. At other times this information is handled by lookupd. By default,
# lookupd gets information from NetInfo, so this file will not be consulted
# unless you have changed lookupd's configuration.