Re: OT - Network Black Hole?

["Mark McCall" <mark@xxxxxxx>]

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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