I have been staring at this for 2 hours now and can't figure it out. My webserver was running fine until earlier today.
But now it can't be accessed from the Internet.
The server is apache2, but that's running fine because I can access sites using wget on the server (localhost/sitename) but any attempt to access the site from outside, and it times out.
I've done netstat -plnt and the response is
Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 648/mysqld tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1056/apache2 tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 546/vsftpd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 557/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 963/exim4 tcp 0 0 0.0.0.0:538 0.0.0.0:* LISTEN 968/gdomap tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 1056/apache2 tcp6 0 0 :::22 :::* LISTEN 557/sshd tcp6 0 0 ::1:25 :::* LISTEN 963/exim4
I can ssh to the server but not FTP (or access by www) Ping is turned off anyway so I haven't done that.
I've also ran nc -vt 220.127.116.11 80 (not my real address) and got Connection Timed Out.
Then I checked /sbin/iptables -L and the response is
Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
But even after I do
sudo /sbin/iptables -I INPUT 1 -p tcp --dport http -j ACCEPT it still doesn't work
ufw status is Inactive
There seems to be another firewall which is accessed by a web based control panel (it's Digital Mines), but I've checked and both ports 80 and 443 have rules allowing 0.0.0.0/0
I'm at my wits end now, I am searching on the internet and just keep getting the same answers - check iptables, check ufw.
Edit One other thing, I can't access external websites from the server either!