telnet to adjacent computer fails

[don fisher]

On 03/04/12 18:59, T.C. Hollingsworth wrote:
> On Sun, Mar 4, 2012 at 6:53 PM, Ed Greshko<Ed.Greshko at greshko.com>  wrote:
>> On 03/05/2012 09:37 AM, Tim Evans wrote:
>>> On 03/04/2012 08:35 PM, don fisher wrote:
>>>
>>>>
>>>> What does telnet require that ping does not?
>>>
>>> A running telnet daemon on the destination host.
>>>
>>
>> Right....
>>
>> I know this is tangential, but this reminded me of something interesting
>> I noticed recently.  I have 2 systems neither running the telnet
>> service.  One is a RHELv4 system and the other a F16 system.
>>
>> Trying to telnet to the RHELv4 system gets "Connection refused" while
>> trying to the F16 system gets "No route to host".  Weird.  Will have to
>> check into that a bit more when I have the chance.
>
> I'd guess the firewall on the RHEL4 system isn't blocking the
> connection, so the connection to port 23 is simply rejected, while the
> F16 system's firewall is blocking it, so that system pretends like
> it's not there.
>
> -T.C.
Sorry, I should have stated that I have the firewall turned off. I set 
SELINUX=disable in /etc/sysconfig/selinux.

Don