topic Re: Problem for telnet service in Operating System - Linux

Problem for telnet service

Wendy_9 — Fri, 12 Mar 2004 03:44:09 GMT

Hi,

I have installed the telnet service for RH linux and have execute chkconfig telnet on. I have find that the telnet service is on by chkconfig --list telnet and also reboot the machine.

But, I still cannot telnet from other server to this RH machine. Is anything I still missing. Anyone can give me a help?

Thanks

Regards,
Wendy

Re: Problem for telnet service

Claudio Cilloni — Fri, 12 Mar 2004 04:15:54 GMT

Maybe you have the firewall activated and it blocks incoming telnet connections. try disabling it:

# service iptables stop

What kind of error do you get? Other machines are unable to connect or once connected you are unable to login?

Ciao!
Claudio

Re: Problem for telnet service

Wendy_9 — Fri, 12 Mar 2004 04:25:00 GMT

Those machines are connected to the same switch.

The telnet connection is refused when I telnet to the linux server

Regards,
Wendy

Re: Problem for telnet service

Alexander Chuzhoy — Fri, 12 Mar 2004 04:28:59 GMT

can you ping the target machine?

if the answer is yes.
Then check in /etc/services if the telnet service defined to listen on port 23
also see if there's no denying rule in /etc/hosts.deny

Did you check the iptables rules?

Re: Problem for telnet service

Claudio Cilloni — Fri, 12 Mar 2004 04:30:04 GMT

I wanna mean the system firewall of your RH machine.
that command will disable it.

Re: Problem for telnet service

Peeyush — Fri, 12 Mar 2004 17:09:00 GMT

just shooting in dark

vi /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
service telnet
{
disable = no
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
}
#### does ur conf says disable = yes
chk ur syslog
Regards,
Peeyush
http://geocities.com/peeyush_maurya/

Re: Problem for telnet service

Steven E. Protter — Fri, 12 Mar 2004 18:21:21 GMT

telnet is part of internet services

in /etc/xinet.d/ there are a bunch of files

one is telnet

or telnetd

vi it

change disable=yes to

disable=no

save

service xintetd restart

SEP

Re: Problem for telnet service

Martin P.J. Zinser — Fri, 12 Mar 2004 19:00:53 GMT

Hello Wendy,

another thing to check:

netstat -a | grep telnet should result in something like

tcp 0 0 *:telnet *:* LISTEN

If this is true the telnet service should be started. A next possible test would be to do a telnet 127.0.0.1, which is essentially the network loopback device of your system.

Greetings, Martin