[CLUE-Tech] telnet and ipchains

[Michael James Robbert]

I just upgraded a few machines to RH 7.1 and found that telnet was 
turned off by default even though it was on with the previous version, 
and RH now uses xinetd by default so your configuration for telnet will 
probably be in
/etc/xinetd.d/telnet - Which should look something like:

service telnet
{
    flags        = REUSE
    socket_type    = stream       
    wait        = no
    user        = root
    server        = /usr/sbin/in.telnetd
    log_on_failure    += USERID
#    disable        = yes
}

You can either comment out the disable=yes line or change it to a no. 
 Then as with inetd you'll need to restart it with a kill -1 <PID>

Brandon N wrote:

>first determine if it is a firewall issue.
>ipchains -L -n will show you the current rules
>ipchains -F
>ipchains -X  will flush the rules and remove all but the default chains
>
>now try to telnet
>try also to telnet localhost
>
>if it still fails, the telnet service is probably not active
>
>check /etc/inetd.conf
>telnet  stream  tcp     nowait  root    /usr/sbin/tcpd  in.telnetd
>
>make sure that line is not commented out (#) (your line may vary
>slightly)
>
>if you make changes to that file, you'll have to kill -1 <PID of inetd>
>
>Of course, you shouldn't be using telnet or ftp anyway, use ssh and
>scp, using ftp for anonymous logins can be safe if it is in a chroot
>jail.
>
>Brandon
>
>--- Ronald Brink <rbrink at 3roses.d2g.com> wrote:
>
>>I have installed redhat 7.1 (twice; one with firewall (medium) and
>>the other
>>time without firewall).  Either way - I am unable to telnet or ftp,
>>etc to
>>this box.  I can telnet/ftp OUT only.  Other users get "unable to
>>connect to
>>remote host: connection refused".  I have flushed the firewall
>>settings
>>(ipchains -F) and then rebooted - no luck.  Any help would be
>>appreciated. 
>>I have hhree systems with the same problem.  I also have a 7.0 rehat
>>that
>>has no problem in or out....
>>
>>Ron
>>
>
>
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-- 
Michael "Murph" Robbert
System Administrator for Math/CS
Colorado School of Mines, Golden, CO  80401-1887
Office: SH220
Office phone: 303-273-3786
Pager: 303-461-6543 or Text messages: murph_pager at bigfoot.com
Email: mrobbert at mines.edu