Hello Magnus and welcome to our forums,
Unfortunately, it looks like we do not yet support setting the remote port for a firewall rule.
However, I have added this on our TODO list of improvements and hopefully it will be added in a future version of Advanced Installer.
Thank you for bringing this to our attention!
Until then, we could use a
custom action to create/set the remote port for our firewall rule.
Best regards,
Catalin