hi pal, sorry but your wrong, ive been at this for a long time now trying to fix it,
Ive just purchased a 1 month for another company to try it because i read that ports could be opened using that vpn service,
24 hours after signing up Ive opened the port successfully and i didnt touch my router or windows firewall,
the other company open 1 port only, i selected 'port forward' in the client and added that port to my app and bang working!
port open so you are 100% wrong it has nothing to do with any firewall or port forward and its everything to do with the vpn tunnel,
avast should follow suit and allow one port only to be opened, that port cannot be changed vpn side so you must change the port in your app which takes seconds to do,
please avast secureline... please listen to my cry and provide an update to your nifty little client which allows 1 port to open so we can all benefit from the port to do so as we wish ;-)
i spent weeks on this with secureline and failed at the end of it,
new one month test with other company took less than 5 hours in my spare time to work out

please put an end to my time wasted to find a method that doesn't exist with your current otherwise excellent service,
and add a feature to open 1 port, also dns leaks were much higher in secureline compared to the other service i now have,
also the other service has a good working kill-switch to protect my setup when vpn disconnects!
please>>>
1) add open 1 port feature
2) close dns leaks
3) add kill-switch feature
if you did you would be one of the best available :-)
cheers RD80