Website works locally, but not in the internet.

[PugJr]

I've been hosting for a couple months mostly without trouble, but today, out of the blue, my website has stopped responding on the internet. I do own the server computer.

 

What I know:

 

My port is open.

I can connect locally and the port/lan i.p. does work.

I can not connect to my I.P. (Not LAN I.P.) with the port.

 

What I don't know:

 

If my server is even getting any request at all from the internet I.P./port or if it just isn't responding but can read the request. I'm not sure how I would check this and if any of you would know how, that'd be great as it would probably give me a tip as to why its not working. 

 

 

 

Using Microsofts "diagnose connection problem" says my I.P. is online, but the server is blocking ports (My internet ports is opened) which would imply that somehow my server installed a firewall (Virus?  ) or activated it for some reason. Does Ubuntu have a built in fire-wall? Its strange that this is to only happen now though. If it is a firewall, whats even stranger is that it doesn't block local I.P.s.

 

Edit: I did make sure that ufw is disabled.

 

If there is any other information that you need to determine what the problem is or could possibly be, please do ask.

[PugJr]

It may be possible that I accidently I.P. blocked myself. I have used the command "sudo iptables -L" to list the IPs that are blocked, but nothing was. Is there any other area where it would list blocked I.P.s?

[corbin]

Your ISP might block port 80.

 

 

Try temporarily completely stopping iptables (service iptables stop or whatever), and then you can see if it's iptables or not.

[oni-kun]

Quite a few ISPs may block by default port 80 unless routed, That is why services such as no-ip exist. If you cannot physically reach your server via the router, then it is most likely a problem on the ISP/NAT's end.