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Totally lost. I have an apache reverse proxy setup serving 3 web servers. Everything has worked fine until I I recieved a new router from my ISP. Now I can only access my webservers from remote locations. I can't access them from my local network. My server configs haven't changed so I have to assume it's the router but Can't resolve it. It's a Technicolor C1100T. Any help would be greatly appriciated as it would be so much easier to update web sites. Thanks in advance for any help.

Michael Robbins
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  • How do you connect both server and client machines via cable or wireless? – Raffa Apr 28 '20 at 21:52
  • Related: https://askubuntu.com/a/1167818/968501 – Raffa Apr 28 '20 at 21:54
  • Raffa - Thanks for the question. It's mixed. Some are wifi and others hardwired. The servers and proxy are all wired though. And hardwired to the router. – Michael Robbins Apr 28 '20 at 22:15
  • Then check the linked answer in my comment above and especially see if ap isolation is enabled under wireless options and disable it. This will prevent connection from wireless clients to the servers if it is enabled. – Raffa Apr 28 '20 at 22:21
  • Raffa - Thanks for the suggestions. Not seeing any option for ap isolation in the router. – Michael Robbins Apr 28 '20 at 22:38
  • Try connecting your client by cable and see if it can reach the server this way? If yes, then it is most likely a wireless setting issue. If not check the IP of the client and see if it is in the same subnet with the server. – Raffa Apr 28 '20 at 22:45
  • Raffa - Ok, well no luck there. Definetly on the same subnet. But hardwiring to the router didn't help. What's your thought's on this.... I'm wondering if it's not a NAT issue with the new router or, pehaps, I never really configured my vhosts on servers or proxy for local access but maybe the other router was "more lenient" per se. I can use the server IP (sort of) to reach them. but usually fails after the front page?? – Michael Robbins Apr 29 '20 at 01:02
  • Ok, new development. On one client machine, I edited the etc/hosts file to add the ip of the proxy and hostname of server 1. It takes a long time, but finally gets to the front page but no farther when navigationg by hostname?? – Michael Robbins Apr 29 '20 at 01:16

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Ok, So what fixed it was adding my reverse proxy IP and server hostnames in my client machine /etc/hosts file. Now it navigates fine. But 2 things I don't understand 1. do I need to go to every client and edit the hosts file (That seems inefficient) and 2. why was this never a problem with the previous router? So not completely solved, but functional for now.

Michael Robbins
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  • This looks like a DNS resolution issue. To resolve local host-names you need the IP of your local router to be present in the list of DNS servers on your clients. Check with systemd-resolve --status and see under the link you use to connect to the router. – Raffa Apr 29 '20 at 19:57