Initially, I could access my Apache web server from the Internet via IP, but for several days I have not been able to access my Apache web server from the Internet.
The web server is fine, I access from my own machine with localhost or the IP that I have assigned and it gives me the welcome message of Default Page of apache.
I can ping both ways between my laptop and any other PC connected to the Internet.
I put any port other than 80 in apache, even the 8080 and if I can see the web server from the Internet, but it is not the idea that I have to put the IP plus the port, in this case the port 8080 or the port that be. link
I tried connecting my laptop to another Internet service that obviously has another IP and if I can see my Apache web server normally by IP and any server connected to the Internet can see it anyway.
The detail is that I have a fixed IP on my Internet service.
I have a Lubuntu 18.04 server and a apache2 2.4.29 (Ubuntu)
What could be happening?
Any ideas to help me get out of this quagmire?