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I want move SSH to port 443, but is used by https. In /etc/apache2/ports.conf I commented the lines for listen by this port. In the default site available also commented the lines. For finish, I complete stop apache service, but yet I receive this:

$ sudo lsof -i :443
COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
sshd    32156 root    3u  IPv4 2415725      0t0  TCP *:https (LISTEN)
sshd    32156 root    4u  IPv6 2415727      0t0  TCP *:https (LISTEN)

I don't understand why https continue there if Apache is down?

note: Debian 3.2.60-1+deb7u3 / Apache/2.2.22

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2 Answers 2

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From that output it looks like ssh is listening on port 443. Under where it COMMAND is the application or service that is running. Under NAME you have *:https That says sshd is listening on all interfaces on port https (443)

I think what might be confusing is the name of the port protocol verses the actual port number that is showing up.

My sshd is still on port 22 and I see

sudo lsof -i :22 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME sshd 976 root 3u IPv4 9173 0t0 TCP *:ssh (LISTEN) sshd 976 root 4u IPv6 9175 0t0 TCP *:ssh (LISTEN)

Where as for apache you can see that the command is different

sudo lsof -i :80 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME apache2 6131 root 4u IPv6 60547 0t0 TCP *:http (LISTEN) apache2 26677 www-data 4u IPv6 60547 0t0 TCP *:http (LISTEN)

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  • lsof -i :80 -P will display port numbers instead of names.
    – Jason C
    Apr 28, 2015 at 19:48
  • mm thank you! Let 'use you' for a question ;) So, why ssh server -p 443 don't answer? what more I must review?
    – HEDMON
    Apr 28, 2015 at 19:49
  • There could be a few things. Firewall sudo iptables -L, you might need to restart sshd, check netstat -an |grep LISTEN to make sure that the port is being used and listened on. Check your logs for sshd and see if it is throwing an error.
    – grag42
    Apr 28, 2015 at 19:57
  • I forgot comment it, just for the records: I'm not sure why, but after restart the server everything was ok. Before I just was restarting the services.
    – HEDMON
    Jun 9, 2015 at 22:40
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There's a list at /etc/services used to convert port numbers to protocol names to increase readability. The first column clearly says that there's sshd, not apache.

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  • That's just the default ports for each service. OP wanted to move ssh (default:22/tcp) to 443/tcp (used by default by https)
    – Pablo A
    Aug 11, 2023 at 15:38

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