Chnaging telnet default port

[nag_2]

Hi,
I want to chenge default telnet port of HPUX 11.x system.How can I do that.

Please help me in that.

Thanks

-Nagaraj

[Denver Osborn]

# vi /etc/services
change the following:
telnet 23/tcp

Change 23 to the new port, make sure the new port isnt already in /etc/services..

After making changes execute:
# inetd -c

# Telnet hostname:port

[Denver Osborn]

sorry - when you telnet to it from a host using default telnet port, type:

# telnet hostname port

[Kofi ARTHIABAH]

Nag:

You have to do the following:
1. Edit the /etc/services file to add the entry for your newtelnet eg.

# echo "newtelnet 12345/tcp #newtelnet port" >> /etc/services

2. modify your /etc/inetd.conf and comment out the entry for telnet; and create a new entry with the newtelnet entry:

# vi /etc/inetd.conf
(comment out the line with telnet)
(create a new line exactly like the commented line but replace telnet in the first column with "newtelnet" - you should have the following lines:

#telnet stream tcp nowait root /usr/sbin/tcpd in.telnetd
newtelnet stream tcp nowait root /usr/sbin/tcpd in.telnetd

3. Now restart inetd (to re-read the config files) with
# inetd -c

do a netstat -a to make sure that you no longer have your server listening on the telnet port, but rather, the newtelnet port.

now you can test this by

# telnet server newtelnet

Good luck.

[Kofi ARTHIABAH]

By the way if you are changing it for security reasons, you have to remember that no matter what port you run telnet on, it can still be sniffed with ethereal or tcpdump... if you really want security, you probably should go with ssh.

good luck

[R Meijer]

ah, security by obscurity
you sound like my employer!
my advice, disable telnet and go for ssh