Re: Telnet problems

["Matthias Oertli" <oertlim@xxxxxxxxxxxxxxxx>]

Neither is the case, host.allow/deny both don't list the particular IP and 
reverse 
lookup works fine.
I'm at a total loss as to what is going on... :(


On Tue, 23 Dec 1997 10:45:32 +1100, James Turnbull wrote:

>There are two potential problems that I can think of:
>
>1.  The address you are coming from is probably being filtered by a security 
program called TCPD.
>
>Look in file etc/inetd.conf.  There is one line for each service managed by 
>inet.
>
>The format of this file is:
>Service Name    Comment    ...    ... end of the line lists a program to run, 
what to call the
>program and any arguments to pass to the program.
>
>Find the TCPD program and if it is being used examine two files in etc 
directory, hosts.allow and
>hosts.deny.
>
>These list all the addresses that are being allowed and denied.
>
>2.  The other option is that the address you are coming from has no valid 
reverse lookup and is thus
>denied.  Check your DNS configuration on the linux box.  That could explain 
wh ythe PC worked and
>the 400 didn't.  Without a valid reverse DNS lookup the linux box will deny 
>the 
connection for
>security reasons.
>
>Hope this helps.
>
>                                                        James Turnbull
>                                                        AS/Tech Consulting
>
>Matthias Oertli wrote:
>
>> I was looking for security problems without any success. I can telnet to the
>> linux box from any other machine on the same subnet without a problem.
>> To be sure I brought tcp/ip on the 400 down and assigned it's IP address to 
a
>> PC from which I could again successfully telnet to the 400.
>>
>
>
>
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------------------------------------------------------------------------------------------------
Matthias Oertli, Sydney, Australia 

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