I have setup a web server, and then it's working fine when accessed through browser. Suddenly the site cannot be reached anymore (Host unreachable). I can ping the Ubuntu server but cannot accessed it through browser. It has no http errors. I can access internet.
Port 80 is open when I tried the commands below:
nmap 192.168.5.141 nmap localhost
If it has to do with proxy or firewall. Please guide me what to do since Im a newbie in managing Ubuntu servers.