refering to the webmin FAQ ,
Webmin has two RPC modes - slow mode, that only uses the same HTTP port the webserver listens on (typically 10000), and fast mode which uses ports 10000 on up. The upper bound depends on the number of concurrent RPC operations, but opening the range 10000 to 10010 should be enough when configuring the firewall between two Webmin servers.
i have to limit virtualmin administartion conxion only to my ip ,
If i run only one site (mine), can i modify my firewall to make webmin listen only on 10000 ?