I discovered that although I haven't even installed iptables, my server was running firewalld. I wasn't even aware it existed. I stopped it, and now I can access my web vandyke.mynetgear.com through my router on port 80 or 443.
I disabled firewalld because I have no idea how to configure it, but my Linksys router is running a firewall that's really easy to configure. I owe thanks to the correspondents on this list who eventually led me to ask online about Debian firewalls. I knew about iptables, which isn't even installed, but I had never before heard of ufw or firewalld. On Tue, 2025-04-01 at 18:07 -0700, Van Snyder wrote: > -------- Forwarded Message -------- > From: jeremy ardley <jeremy.ard...@gmail.com> > To: debian-user@lists.debian.org > Subject: Re: Web server access > Date: 04/01/2025 05:29:23 PM > > > On 2/4/25 08:21, Timothy M Butterworth wrote: > > > > Ok so if I understand you correctly then you are attempting to port > > forward 80 and 443 through the router's WAN Wide Area Network > > interface to a server located in the DMZ DeMilitarized Zone. Does > > the > > server have Apache ACL's, IP Tables or TCP wrapper running on it? > > Can > > you try to do a port ping or use telnet to connect to port 80 to > > test > > connectivity. ex: `telnet <Routers WAN IP Address or Public DNS > > Name> > > 80`. As you say that the server is on the inside of your network. > > Have > > you tried placing the server in the DMZ? > > > Another alternative is the ISP has started blocking incoming > connections > on the web ports? > > How could I find out if it's doing that? > > It's not blocking the random port that I map to 22 so I can ssh to my > server. > > I can FTP to my server from itself, but not through the router. > > I can't FTP to my server from another computer in my house. > > And now it seems I can't load web pages from my server on other > computers in my house. So maybe the server has started some kind of a > firewall. How would I find it and either turn it off or configure it > so it allows more than ssh. >
