topic Re: i am not able connect in Operating System - Linux

i am not able connect

Chandrasekar_6 — Thu, 06 Oct 2005 18:12:55 GMT

Hi Admins,

I install Redhatlinux9 in my desktop as a server .But i am not able to connect the machine .I am new to linux environment,so please help me to connect the machine from remote.But i gave static ip address.What are procedures i have to do.

Thanks in advance.

chandru

Re: i am not able connect

njia_1 — Thu, 06 Oct 2005 19:26:04 GMT

Hi

What IP address you assigned to ther RH 9 box and what IP address you configued on your PC or workstation.

When you installed RH 9, did you turn on the firewall ?

Are you trying to access it using ftp, http, telnet, ssh ?

Login that box as root from local console and stop iptables and ipchains if installed. Once they are stop, try again

/etc/init.d/ipchains stop
/etc/init.d/iptables stop

Re: i am not able connect

Chandrasekar_6 — Thu, 06 Oct 2005 19:32:38 GMT

Hi Nija :

Thanks for you reply.

My machine is not in firewall.
I tried to access through telnet.

Re: i am not able connect

njia_1 — Thu, 06 Oct 2005 20:48:39 GMT

What IP address you used for the RH 9 box and the computer you tried to telnet to this RH 9 box ?

Have you tried to access other computers on the network from this RH 9 box ?

Re: i am not able connect

njia_1 — Thu, 06 Oct 2005 21:25:11 GMT

Hi

Just something came up in my mind, telnet is disabled by default since RH 8 I think.

use following command to enable it if you want

/sbin/chkconfig --level 345 telnet on
/etc/init.d/xinetd restart

Re: i am not able connect

Gopi Sekar — Fri, 07 Oct 2005 00:57:45 GMT

telnet is by default disabled in RH distributions, also it is not safe to access a box over telnet.

So use SSH from the remote machine (if you are using windows, then use 'putty' a free SSH client for windows)

On the linux box ensure the IP address is configured, run 'ifconfig' as root user and see whether eth0 is configured with the IP address you gave. Also try to ping the machine with the ip address you gave and see whether it works.

Hope this helps,
Gopi

Re: i am not able connect

Morcos — Fri, 07 Oct 2005 01:36:10 GMT

Is your network card up, can you ping the other machines. If not try ifup eht0 or check your configuration and the default gateway.

Also make sure telnet is enable on your machine: chkconfig --list telnet.

HTH
ziad

Re: i am not able connect

Muthukumar_5 — Fri, 07 Oct 2005 03:06:54 GMT

Ok. Are you able to ping to the new linux machine.

# ping

If it is successful then,

# telnet

are you able to do ? Are getting any errors?

# ssh

Is it working?

If it is not working, log on to the linux machine with it's console then,

# netstat -na | grep -i :23

Is it listening?

# iptables -F

Try now.

hth.

Re: i am not able connect

Chandrasekar_6 — Fri, 07 Oct 2005 09:23:17 GMT

Hi Admins:

Thanks for reply

I am able to ping the linux machine from my windows desktop.

From linux machine i am able to rlogin to HPUX machine.From HPUX machine i am not able to rlogin the linux machine.

In the folder /etc/xinetd.d there is no firewall.

I start the telnet service

service xinetd start.

I add in securetty file console pts/o to pts/8

In /etc/xinetd.d i cat telnet the output is

# 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
}

please give the solution to connect through telnet from remote.

Re: i am not able connect

Gopi Sekar — Fri, 07 Oct 2005 09:50:25 GMT

Try to connect to telnet from the local linux box itself first.
i.e from the linux box,
telnet localhost

and see whether you are getting the login prompt. If you are not getting the login prompt it means telnet service is not running on the system.

Hope this helps,
Gopi

Re: i am not able connect

Chandrasekar_6 — Fri, 07 Oct 2005 10:10:41 GMT

Hi Gopi

I gave telnet localhost

it is connecting.

Re: i am not able connect

Gopi Sekar — Fri, 07 Oct 2005 10:19:20 GMT

Ok it means telnet is running fine on the linux box and the problem is most likely from the remote box or on the network.

If the boxes are connected by a router, ensure the router allows telnet traffic.

Second ensure no firewall running on the linux box (hopefully you have already done this) still, confirm it by 'service iptables stop' on the linux box.

From the remote box login to the linux box and see whether you are getting the login prompt, if not the problem is on the network side. If you are getting the login prompt but not able to login as root (eg) then the problem is some misconfiguration in the Linux box.

Hope this helps,
Gopi

Re: i am not able connect

Chandrasekar_6 — Fri, 07 Oct 2005 10:57:04 GMT

Hi Gopi:

Thanks for reply.

i did service iptables stop.

Thanks

Krish

Re: i am not able connect

Chandrasekar_6 — Fri, 07 Oct 2005 11:00:32 GMT

Thanks for all.i will touch with you

Bye for now

Thanks

Chandrasekar