We have a problem. We have a router which has, amongst others, ports 80 and 443 open. Both are pointing to one machine running apache2.
However, https on 443 works, but http on 80 doesn't.
nmap shows port 80 as filtered (why?), and port 443 as open.
I have stopped the firewall on the web server. I have made no changes to the apache2 config since installing it. Still no "It works" page!
Any help gratefully received!