September 6, 2014 at 21:40 #418
I order to get the most out of OPI some ports need to be reached from the Internet.
OPI tries to do this using UPNP, but if your router does not support this (like the Excito B3 which in all other aspects is a good router), you will have to open and forward ports manually. It is very rare that routers block traffic from the local network to internet so normally there is no need to do anything for those ports.
The incoming ports used are:
Port 443 – HTTPS
HTTPS is used for synchronizing calenders, contacts and files as well as access to the web interface.
This port can in the router be set to another port, but in that case also remember that you have to enter the specific port number in all configurations and if you want to access the web interface.
Port 25 – Incoming mail
If OPI shall be able to receive incoming mails, port 25 needs to be accessible.
Port 143 and or 993 – Synchronizing mail
In order to read email from an external device such as a smart phone or a computer port 143 or 993 needs to be accessible. Port 993 is always encrypted via SSL while port 143 uses TLS to negotiate whether encryption should be used.
Also, if you are lazy and want to save typing an ‘s’ to directly access using https, you can also set up port 80 which will then immediately redirect you to https on port 443. Note that this only works if you are forwarding the standard 443 port to OPI, this will not work on a custom port forward.
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