login works via ssh but not via telnet

[Brett Simpson]

I created a user account and it works when loggin in via ssh. It doesn't work via telnet. I also just realized that root is accessible via ssh but not telnet. Any ideas?

Thanks

[Sunny123_1]

Hi

Check your /etc/inetd.conf file and look for telnet option i think it has # mark.

Also check /var/adm/inetd.sec file and look any telnet deny is there or not

Hope this help.

Regards
Sunny

[Basheer_2]

This is good.

Usually now a days sysadmins disable all the traditional insecure services to secure the system.

sunny has given all the correct steps.

[Basheer_2]

if you still need it.

follow Sunny's steps and also there should be entries in the /etc/services file.

[Steven E. Protter]

Shalom,

Check inetd.conf

Probably telnet is disabled.

netstat -an | grep ":23 "

See if telnet is listening.

If it is, see if inetd.sec is blocking telnet or TCP wrappers configuration is interfering.

Check logs /var/adm/syslog/syslog.log

SEP

[Brett Simpson]

I've checked /etc/inetd.conf and there are no commented lines regarding telnet. /var/adm/inetd.sec does not exist on this server.

I can also telnet to other non-root users without a problem.

[James R. Ferguson]

Hi Brett:

> I can also telnet to other non-root users without a problem.

Look for your '/etc/securetty' file. It undoubtedly exists and has a line with the word "console" in it. The presence of this file inhibits root logins to the listed devices.

Regards!

...JRF...

[Brett Simpson]

Telnet is not disabled at all. I can connect, just get a reply that login is incorrect. This only happens on root and certain other non-root users.

[Brett Simpson]

James,
Shouldn't that entry in /etc/securetty also disable root login via ssh? I can login to the root account via ssh. The console entry is in /etc/securetty, but doesn't stop login from ssh. I also commented it out and still the same results.

That also doesn't really explain why I can login via telnet to some non-root users, but can't with others.

This is also a system that I just inherited, so I didn't set it up.

[James R. Ferguson · Accepted solution]

Hi (again) Brett:

> Shouldn't that entry in /etc/securetty also disable root login via ssh? I can login to the root account via ssh.

No, 'ssh' uses 'PermitRootLogin' in '/opt/ssh/etc/sshd_config'. Change it to "no" (and remove the comment mark) and restart the 'sshd' daemon.

Regards!

...JRF...