Re: Telnet-ing

Re: Telnet-ing

[Scott Taylor]

At 11:49 AM 04/30/03, you wrote:
>Prior to Mandrake 8.0 I was able to telnet to my server, now
>that isn't possible.  I tried everything I know to make it work.
>I know of ssh, but it isn't my primary concern.  What is blocking
>my telnets?

xinetd

Re: Telnet-ing

[Mikel Bauer]

Do you have the telnet server installed?  Is it running?  If memory 
serves, the telnet server on mandrake 8 is run via xinetd, make sure 
it's not disabled...

Do you have a fire wall installed?  Or is there one anywhere between you 
and the firewall?  If so, make sure it's allowing port 23 traffic to the 
server.


SoloCDM wrote:
> Prior to Mandrake 8.0 I was able to telnet to my server, now
> that isn't possible.  I tried everything I know to make it work.
> I know of ssh, but it isn't my primary concern.  What is blocking
> my telnets?
> 

-- 
Mikel Bauer
mikel@bridgeband.net

Re: Telnet-ing

[goodman]

man securetty

Re: Telnet-ing

[Nathan]

Hi,

> These are the RPMs:
>
> telnet-0.17-7.1mdk
> telnet-server-0.17-7.1mdk
>
> This is telnet in /etc/xinetd.d:
>
> service telnet
> {
>   disable                         = no
>   flags                           = REUSE
>   socket_type                     = stream
>   wait                            = no
>   user                            = root
>   protocal                        = tcp
>   server                          = /usr/sbin/tcpd
>   server_args                     = /usr/sbin/in.telnetd
>   log_on_failure                 += USERID
> }

Is xinetd running? If you upgraded you might have both inetd and xinetd
installed, maybe inetd is running and telnet is not configured there?

Regards,
Nathan

> No firewall is running, files such as /etc/hosts.deny,
> /etc/hosts.allow, /etc/hosts.equiv, /etc/host.conf are configured
> correctly.
>
> The following is the output when telnet fails:
>
> Trying XXX.XXX.XXX.X...
> telnet: Unable to connect to remote host: Connection refused
>
> Using "chkconfig --list" shows: telnet: on.
>
>

-- 
  4:01pm  up  1:53,  1 user,  load average: 0.00, 0.00, 0.00
Linux willy.nateworks.ca 2.4.18 #3 Fri May 17 14:22:19 PDT 2002 i586 unknown

Re: Telnet-ing

[Glynn Clements]

SoloCDM wrote:

> This is telnet in /etc/xinetd.d:
> 
> service telnet
> {
>   disable                         = no
>   flags                           = REUSE
>   socket_type                     = stream
>   wait                            = no
>   user                            = root
>   protocal                        = tcp
    ^^^^^^^^

"protocal" is a typo; maybe this causes xinetd to ignore the service?

> Trying XXX.XXX.XXX.X...
> telnet: Unable to connect to remote host: Connection refused

Check the output from "netstat -at" and "ps ax" on the server.

1. Does xinetd appear in the output from "ps"?
2. Does netstat show anything listening on the telnet port (23)?

If the answer to 1 is "no", xinetd isn't running.

If the answer to 1 is "yes" and the answer to "2" is "no", the problem
is the xinetd configuration.

If the answers to both are "yes", the problem lies elsewhere; maybe
packet filtering (iptables), maybe something else. Although the
"Connection refused" error suggests that the problem has to be at a
low level. I.e. not hosts.{allow,deny}; those aren't checked until the
connection has been accepted.

-- 
Glynn Clements <glynn.clements@virgin.net>