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Old 09-05-2003, 01:03 AM   #1
skibud2
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telnet problem - I have searched all over


I am trying to get telnet to work. I know that I should use ssh (but I am doing this for experimental reasoning). I have installed the server and found that it is suposed to be working. For example, here are some of the tests that I did:

=========================================
[mike@localhost xinetd.d]$ /sbin/chkconfig --list | grep telnet
#telnet#: on
telnet: on
[mike@localhost xinetd.d]$ netstat -pant | egrep :23
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN -
[mike@localhost xinetd.d]$ telnet 192.168.0.101
Trying 192.168.0.101...
Connected to 192.168.0.101.
Escape character is '^]'.
Red Hat Linux release 9 (Shrike)
Kernel 2.4.20-6 on an i686
login
=========================================

The problem is that I cannot connect via other computers on the LAN or through a Virtual server on my router. I can however connect via the local computer. Any suggestions? (besides switching to ssh )
 
Old 09-05-2003, 01:26 AM   #2
exodist
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edit /etc/inetd.conf and /etc/services, make sure the telnet lines are not commented out, if they are uncomment and do a kill -HUP (INETD PID) you can find the pid with ps -aux
 
Old 09-05-2003, 09:32 AM   #3
skibud2
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I found xinetd.conf, not intetd.conf, and that had no lines commented out. Neither did services. Any other suggestions?

Thanks,

-Mike
 
Old 09-05-2003, 10:36 AM   #4
exodist
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sorry, I don't
 
Old 09-05-2003, 11:02 AM   #5
Hangdog42
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Is your firewall blocking access to port 23? That would explain why you could connect from within the machine, but not from outside.
 
Old 09-05-2003, 11:11 AM   #6
skibud2
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I am not concerned about the firewall (router) just yet because I cannot connect via another computer within the firewall. Maybe it has something to do with Redhat's firewall?

Thanks for all the help so far.

-Mike
 
Old 09-05-2003, 12:53 PM   #7
Hangdog42
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Yes, I was suggesting that you look at the RedHat firewall. That may be where your trouble is.
 
Old 09-05-2003, 04:36 PM   #8
skibud2
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I changed the Redhat configuration through one of the system (GUI) tools. (I would like to know what this does under the GUI). Now I can telnet with all of my LAN computers, but I cannot telnet from an outside source. Does this mean that my router/firewall is not working correctly?

-Mike
 
Old 09-05-2003, 09:30 PM   #9
skibud2
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Well it turns out that it was a problem with my firewall/router. I updated the firmware and it worked great. Thanks all for the help.
 
Old 09-06-2003, 08:20 AM   #10
Hangdog42
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Quote:
I would like to know what this does under the GUI
The GUI front ends you are using all deal with iptables (or ipchains on older distros). If you do a search on iptables here you will find TONS of info, including several firewall script examples. Learning iptables isn't a bad thing as it would allow you to customize your firewall very easily.
 
  


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