Sometimes I'm behind a firewall that only allows outgoing traffic through port 80, which prevents me SSH access to my ASUS.

If I try to change dropbear to listen on port 80, I get this error:
Code:
dropbear[345]: Failed listening on '80': Error listening: Address already in use
dropbear[345]: premature exit: No listening ports available.
The problem seems to be the web GUI, which is listening on: 0 0.0.0.0:80.
How can I change the listening address of the WWW GUI?

I'm using 1.9.2.7-d-r740.