how do you shut down ssh on a server

[pedliz11]

how is the way to shut off ssh on a server and turn it back on again

[A. Clay Stephenson · Accepted solution]

I assume that you actually mean how to enable/disable thr sshd daemon rather than the ssh client.

/sbin/init.d/sshd stop # stops the daemon
/sbin/init.d/sshd start # restarts it

You can edit /etc/rc.config.d/sshd and set SSHD_START=0 to disable the daemon at boot.

[Ivan Krastev]

Right commands are:
/sbin/init.d/secsh stop
/sbin/init.d/secsh start

regards,
ivan

[A. Clay Stephenson]

Ivan is correct; this is one of the oddball cases where the configuration file in /etc/rc.config.d is named differently (sshd) from the script in /sbin/init.d (secsh).

[pedliz11]

the reason that i ask is that a paricular application is trying to use tcp port 5001 and 6000 the nmap command shows thse ports as filtered. How do i unfilter them.. Or can I unfilter them?

[Ivan Krastev]

With nmap you check the remote machine and status filtered can be due to firewall restrictions between 2 nodes.

Check on the server if ports are in use:
#netstat -an

or with lsof.

regards,
ivan

[Bill Hassell]

By default, ssh uses port 22 unless you have changed it. There are good reasons to change from port 22, especially if your box is connected to the open Internet. However, ssh is an important system network service so I would not recommend setting the port to a high value.

Now it's possible you are seeing these high numbered ports open because the ssh user has logged in and started some application that uses the ports. Get a copy of lsof to display the program(s) that use those ports.

[pedliz11]

where do i get lsof for hp-ux

[Patrick Wallek]

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.78/