RE: OT - Network Black Hole?

["Mark McCall" <mark@xxxxxxx>]

Here's what my mate gets trying to VNC between PCs on his LAN...

"java.io.IOException: Local loop-back connections are disabled
And the same error if i type my ip into the VNC Viewer"

Does this cast any light on things?

Thanks

M.





>-----Original Message-----
>From:
>sentto-1109639-9128-986827576-mark=automatedhome.co.uk@xxxxxxx
>om
>[mailto:sentto-1109639-9128-986827576-mark=automatedhome.co.uk@xxxxxxx
>nelist.com]On Behalf Of Mark McCall
>Sent: Monday, April 09, 2001 3:48 PM
>To: ukha_d@xxxxxxx
>Subject: Re: [ukha_d] OT - Network Black Hole?
>
>
>Thanks...will give these a try.
>
>M.
>
>
>----- Original Message -----
>From: "Adam Stevens" <adam@xxxxxxx>
>To: <ukha_d@xxxxxxx>
>Sent: Monday, April 09, 2001 3:31 PM
>Subject: RE: [ukha_d] OT - Network Black Hole?
>
>
>> > A mate is going up the walls because he cannot connect to his
machine
>over
>> the Net
>> > via VNC etc.  We have tried another remote-control app as
well as
>> shoutcast server
>> > and nothing works.
>>
>> Couple of things...
>>
>> Is he running a local network?  If so, can he VNC to one machine
from
>> another locally?
>>
>> I don't know if "Shields Up" does a port scan of high
port numbers, but
>VNC
>> uses as default port 5800 and 5900.  5800 is used for it's own
>web server,
>> so it's quite a good test to go to "http://hisIPaddress:5800/";
>and see if
>> you get a VNC login screen... If you don't then either the
>port is being
>> blocked, or VNC isn't setup (which narrows it down, because if
>you're sure
>> VNC is set-up correctly, then it's something blocking the ports!
>>
>> You could also try some other type of port scanning software
>to scan the
>> high ports (eg, 5800 and above).  See if you get anything there.
>>
>> Can you access his web server (PWS) remotely?  If so, can you
>switch the
>PWS
>> port from 80 to 5800 or 5900, and see if you can still access
>it... If you
>> can connect when it's on port 80, but not when it's on port 5800,
then
>> something *is* blocking the port!
>>
>> FWIW, I have a friend, who's w2k machine refuses to allow any
>FTP server
>on
>> port 21 (including IIS).  It's almost as if port 21 on his machine
is
>"bust"
>> :-)  Sounds like a similar problem?
>>
>> If none of the above works, then give it a good hard kick... Or do
what
>the
>> network admins did at one place I worked at, and just spend a few
hours
>> pinging machines until it magically starts working! :-)
>>
>> Adam.
>>
>>
>>
>>
>>
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>
>
>





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