Solved Cannot log in with FQDN but can login local IP address with SSL warning

[Varalino]

Phone system seems to work but can’t login to console with FQDN and I get a warning (redline through padlock symbol) that local connection is not secure when I login through the local IP.

Nslookup of the FQDN yields:
DNS server handling your query: localhost
DNS server's address: 127.0.0.1#53

Non-authoritative answer:
Name: <FQDN>
Address: <PUBLIC IP>

Cannot login with - https://<PUBLIC IP>:5001/

Router port forwarding
5001->5001
443->443
5015->5015
5060->5060
5061->5061
5090->5090
5228->5228
5022->5022
Also 9000:10999

Port 5000,5005, 5006 and 80 are forwarded to my network attached storage

 

[NickD_3CX]

How do I prove it's the ISP causing the block?

Also is seems strange that all of the ports are blocked, yet the 3cx is working with some (but not all) carriers.

You said they control the Router. Make sure your can access the 3CX Management Console from within the local network (to make sure all services are running correctly), then call them and tell them to access the Management Console from your Public IP and HTTPS port.

If they can't, tell them to keep changing things until they can!

...or if you are sure they are the problem, change ISPs....

 

[Varalino]

Problem Solved! The issue was cause by ports being blocked by the ISP..

Thank you all for your help and support!!

 

[Saqqara]

Can not access your nas device externally (as you have configured port forwarding for this device)

 

[Saqqara]

Just seen your previous post, glad it is sorted

 

[NickD_3CX]

@Varalino Glad you got to the bottom of it!