Why do downloads made from within Webmin fail, when other programs like wget work fine?
If you have a firewall that transparently proxies outgoing HTTP requests (such as one by Sonicwall), this may cause requests made by Webmin to by timed out. Without going into the underlying protocol details, my investigation has shown that Sonicwall is making incorrect assumptions about the number of IP packets an HTTP request will be in, and is thus broken. The work-around is to disable the Enforce Host Tag Search option in the firewall, which turns off this broken feature. • What ports does Webmin RPC use> 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.
