Using a UAL SSL port other than the default 5767

Sometimes due to firewall restrictions it is not possible to connect to Scalix on port 5767, even though other ports are available.

Please note: Circumvention of firewalls in this way may not be legal, or may violate corporate policy. Please talk to your system administrator ahead of time. Also, this is not recommended for normal use, only if there is no alternative, as it will place additional load on your Windows system.

Configuring the server

• Normally your stunnel.conf will be similar to the following:

CAFile = cacert-bundle.crt
cert = stunnel.pem
client = no
options = NO_SSLv2
[imaps]
accept = 993
connect = imap
[uals]
accept = 5767
connect = 5729

• Pick a suitable port on your server. I in this example I am going to use 22.

• Verify the port is indeed unsused:

lsof -i:22

• Change your stunnel.conf as follows:

CAFile = cacert-bundle.crt
cert = stunnel.pem
client = no
options = NO_SSLv2
[imaps]
accept = 993
connect = imap
[uals]
accept = 5767
connect = 5729
[uals-alt]
accept = 22
connect = 5729

• stop and restart stunnel and connect to the server from a different PC, verifying it is listening on the right port.