Telnet Problems?

[Mark MacDonald_2]

We have two boxes here running HP-UX 11.00. One is allowing telnet from specified clients (hosts.allow), but the other is not (same hosts.allow file). Is there something besides the hosts.allow file that could prevent a telnet connection from occuring? This is a private LAN, and no firewall is involved.

Thanks.

[Mark Grant]

Check /etc/inetd.sec

And if it is refusing all telnets, /etc/inetd.conf is a prime suspect.

[Patrick Wallek]

Have you checked inetd security? /var/adm/inetd.sec can be used quite extensively for (dis)allowing services that connect via inetd, which included telnet.

[Bryan D. Quinn]

Hello,

Check your /etc/services file and make sure telnet is not commented out in there for some reason. Also, how are you trying to connect with IP or hostname? If hostname, make sure both hostnames and respective ip addresses are correct in your /etc/hosts files on each box.

-Bryan

[G. Vrijhoeven]

Mark,

Do you get a login prompt?
You clould check if inetd is running, or your /etc/inetd.conf file for typo's

HTH,

Gideon

[Mark Grant]

Apologies, my inetd.sec file is in the wrong place :) Thanks Patrick

[Sanjay_6]

Hi Mark,

Check out this doc from itrc. It may help,

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000072157142

The doc id is KBRC00013880

Hope this helps.

Regds

[Steve Steel]

Hi

1)netstat -a |grep telnet
tcp 0 0 *.telnet *.*
LISTEN


This should be there

2) grep telnetd /etc/inetd.conf
telnet stream tcp nowait root /usr/lbin/telnetd
telnetd

needed


3)Patches

4)Name Resolution . can the host telnet to itself

5)look for and remove /etc/securetty if it is there


Show what happens when you try to telnet


Steve Steel

[Mark MacDonald_2]

You folks are amazingly fast! Okay here goes:

/var/adm/inetd.sec makes no reference to telnet at all.

/etc/inetd.conf is the same on both boxes.

I am trying to connect via IP.

There is no /etc/inetd.sec file.

/etc/services is the same on both boxes.

Still no good!

[Mark Grant]

Do you get a "Connection refused" or do you get a blank nothing and just waiting their for a while?

If the latter, I'd start thinking about routing or name resolution and things like that. If the former, then .... well, hope it's the latter.

[Mark MacDonald_2]

I just ran "netstat -a | grep -i listen", and port 23 is not listed.

[Mark MacDonald_2]

I'm getting "Could not open a connection to host on port 23: Connect Failed.

[Sanjay_6]

Hi,

check the /etc/services files on both servers. Also compare the /etc/inetd.conf file on both servers.

Hope this helps.

Regds

[RAC_1]

ps -ef|grep telnetd

Is it running? Do you have it listed in /etc/services and in /etc/inetd.conf?

netstat -a|grep telnet

Anil

[Mark MacDonald_2]

It's listed in services and it's in the inetd.conf, but no it is not running when I netstat.

[G. Vrijhoeven]

Hi Mark,

inetd starts telnet. CHeck if the inetd is running:

ps -eaf | grep inetd.
if not start it #inetd if so restart #inetd -c

HTH,

Gideon

[Mark MacDonald_2]

I show /usr/sbin/inetd -l running.

[RAC_1]

Post the lines from /etc/services and /etc/inetd.conf.

Post ll /usr/lbin/telnetd.

Anil

[Mark MacDonald_2]

Services:

telnet 23/tcp #Virtual Terminal Protocol

inetd.conf:

telnet stream tcp nowait root /tcb/files/tcp_wrappers/bin/tcpd /usr/lbin/telnetd