reply to vdsluser
Re: [Internet] Sagemcom 2864 port fowarding no longer working?!? A workaround is to setup an internal DNS with a tool called dnsmasq and overwrites (by adding an entry to host file) the external fully qualified host name so it resolves to a local IP.
In my environment, file dnsmasq.conf looks like this:
Last step is to set static DNS on all local machines so it points to server running dnsmasq.