reply to Lucid
Re: [Internet] Sagemcom 2864 port fowarding no longer working?!? I have been experiencing the same problem, which is a royal pain in the ass as it prevents me from testing my SSL certificate for my personal web server. I have put in a call to Bell and they are sending a senior tech over to my place to see the problem and hopefully bring a modem with a newer firmware.
In the meantime, I have figured out a workaround I haven't had to use in 15 years. It's not perfect as it won't work on any device you don't have access to the HOSTS file, but it would work on Windows and Linux computers no problem. Simply put a line in with the internal IP of your server and your external address. For example:
This will override the problem because HOSTS files are checked before a DNS lookup is performed.