telnet

[navin]

Hi,
I cannot do telnet to a machine(hp J).I can do
ftp ,rlogin to that machine.What is reason?pls
help.
Thanks

[Helen French]

Hi Navin,

Check for the daemon 'telnetd' exists

# ps -aef | grep telnetd

HTH,
Shiju

[A. Clay Stephenson]

Hi:

The very first thing to check is whether telnet has been commented out in /etc/inetd.conf on the machine. If so, uncomment it, and then run inetd -c.

[Steven Gillard_2]

A couple of things to check:

1. Is there a telnetd entry in /etc/inetd.conf?

2. Are there any IP address restrictions configured for the telnet service in /var/adm/inetd.sec?

Regards,
Steve

[Helen French]

Hi Navin,

Check the file /etc/inetd.conf for 'telnetd' starting options.

Also if you make any changes to that file, then restart inetd

# inetd -c

HTH,
Shiju

[navin]

I checked three of your suggestions.Inetd.conf,
inetd.sec are perfect.
If i do ps -ef|grep telnetd is not running
Thanks

[Darrell Allen]

Hi,

Three things to check:

1 - telnet must be in /etc/services
# grep telnet /etc/services
telnet 23/tcp # Virtual Terminal Protocol

2 - telnet must be in /etc/inetd.conf
# grep telnet /etc/inetd.conf
telnet stream tcp nowait root /usr/lbin/telnetd telnetd

3 - /var/adm/inetd.sec must not deny telnet access from your host

Darrell

[Helen French]

Hi Navin,

If 'ps' reports no telnetd running, that means there are no other user connected to the system through telnet command. The inetd daemon invoked telnetd whenever a request comes.

Can you post the exact error message ? ( eg: connection refused ..etc)

HTH,
Shiju

[K.Vijayaragavan.]

What is the error message you are getting?

Are you doing telnet from a PC?

Ensure telnetd is running on the server by issuing command,
ps -aef | grep telnet

If not running check the /etc/inetd.conf file whether it is enabled or not.

check the /var/adm/inetd.sec file on the system also in additon to the above mentioned activity,

look for entry "telnet allow/deny"
entry. If such entry is there then add/remove your local machine's ip also in it's access list.

If you don't find "telnet allow/deny" entry, just ignore it .

-Vija

[navin]

The error message

Escape character is '^]'.
Local flow control off
Connection closed by foreign host.

I checked entries in inetd.conf,inetd.sec.Perfect.

Pls help

[Helen French]

Hi,

Check this out:

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=6820e9ae1781b05fee/screen=ckiDisplayDocument?docId=200000042483196

HTH,
Shiju

[Steven Gillard_2]

Check for telnetd error messages in /var/adm/syslog/syslog.log, it's possible that you've run out of psuedo-terminal devices.

# grep telnetd /var/adm/syslog/syslog.log

Regards,
Steve

[Helen French]

Hi,

This may help you:

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=6820e9ae1781b05fee/screen=ckiDisplayDocument?docId=500000000092553

HTH,
Shiju

[navin]

The erroe message in /var/adm/syslog/syslog.log

Mar 13 15:04:35 apricot telnetd[1114]: I_LINK_DEV ioctl failed: Invalid argument
Mar 13 15:04:41 apricot telnetd[1124]: I_LINK_DEV ioctl failed: Invalid argument
Mar 13 15:08:18 apricot telnetd[1632]: I_LINK_DEV ioctl failed: Invalid argument
Mar 13 15:52:55 apricot telnetd[1775]: I_LINK_DEV ioctl failed: Invalid argument
Mar 13 16:03:38 apricot telnetd[1880]:

PLs help
Thanks

[Helen French]

Hi Navin,

Check these threads:

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=f3362c6d0c0f04235c/screen=ckiDisplayDocument?docId=200000058669580

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=f3362c6d0c0f04235c/screen=ckiDisplayDocument?docId=500000000092553

HTH,
Shiju

[pap]

Hi NAvin,

In the syslog file, found this error:

I_PLINK_DEV ioctl failed: Invalid argument

How to I determine the cause of this problem?

Configuration Info

Operating System - HP-UX
Version - 11.0
Hardware System - HP9000
Series - V225

Solution

This problem is caused by device drivers for telnet with incorrect major or minor numbers.

Use these steps to determine the cause:

1. Use this command to determine the numbers:

lsdev | grep tel

75 -1 telm strtelm
76 -1 tels strtels

2. Notice the major number of 75/76.

3. Now check these files:

a. ll /dev/telnetm

crw-rw-rw- 1 root sys 72 0x00004b Oct 26 07:44 /dev/telnetm

b. ll /dev/pts/t*

crw-rw-rw- 1 root root 76 0x000000 May 1416:21 /dev/pts/t0

Note: These files should look similar on your system; however, on the problem system, some of the device files were mismatched
for major numbers--specifically the tels(strtels) and pts/t*
files.

To resolve the problem, run these commands:

1. Create slave devices:

insf -d tels

2. Create master devices:

insf -d telm

Hope this helps.

-Piyush

[jasper_2]

Hi,

Considering all the things you need to check, you can try to check also the following.

1. telnetd version?
to check do:
"what /usr/lbin/telnetd"


2. check your telnet patch
to check do:
"what /stand/vmunix | grep str_telnet"

3. check your system model
to check do:
"model"

4. Check entries at the /etc/.supported_bits


all entries report from #1-4 should consistent including the letter case.

You need to do propatch if they are not consistent.


Hope these could resolve your problem.

thanks.

[K.Vijayaragavan.]

Hi,

1)I used to get this error when i telnet to nonstandard ports.

i.e. IF i telnet to port21 which is (ftp port), i used to get that message.

2)try to telnet exactly on port 23 by,
#telnet ip_address 23

3)try to telnet from your system to your same system and see what happens?

So make sure you have this exact entry in your /etc/inetd.conf file,

"telnet stream tcp nowait root /usr/lbin/telnetd telnetd"

4)Make sure you have this exact entry in your /etc/services file,

"telnet 23/tcp #Virtual Terminal Protocol"

5)If possible and if it is not going to impact your work , try rebooting the server.

-K.Vija

[Darrell Allen]

I should be more specific. The local system is where /etc/services needs to have telnet defined to use port 23. If it has something else, then telnet will use that port by default.

Darrell

[Calvin Bebermeyer]

I wish I could assign PAP 10 points for his solution to the error given in this thread:
I_LINK_DEV ioctl failed: Invalid argument

I just finished a cold install of 11.00 and ran into this problem. Pap's solution solved it...

thanks,
Calvin

[Balaji_3]

Hello Sir

Try insf -e in ur root prompt....
and check telnetd service is running or not, by
ps -ef| grep telnetd