Re: OT - Network Black Hole?

["Mark McCall" <mark@xxxxxxx>]

Great!  This sounds like our problem Neil

Where do we get this programme?

Thanks

M.


----- Original Message -----
From: Neil F <automated@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Monday, April 09, 2001 10:51 PM
Subject: Re: [ukha_d] OT - Network Black Hole?


> Heres a snippet from the ICS config Read Me...I say this is the
> problem..loop-back error may mean ICS isn't forwarding it to the local
host.
>
> === INTRODUCTION ===
>
> When Microsoft released the "second edition" of Windows 98,
they included
an
> optional component called "Internet Connection Sharing"
(ICS). ICS allows
a
> network of users to share a single internet connection through a
process
> called Network Address Translation (NAT).
>
> ICS allows any OUTGOING connection to take place. Therefore any client
> computer can surf the net, or send and receive email. However,
INCOMING
> connections, like those required for a web server, are another story
> entirely. ICS blocks incoming connections on all ports unless they are
> explicity opened.
>
> Unfortunately, ICS does not include any means to open or configure
port
> access. This program, ICSCFG, allows you to do just that. You can open
or
> close port access. You can create new port mappings. You can even have
ICS
> forward incoming connections to any interior machine.
>
> HTH
> Neil
> ----- Original Message -----
> From: "Neil F" <automated@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Monday, April 09, 2001 10:33 PM
> Subject: Re: [ukha_d] OT - Network Black Hole?
>
>
> > Mark,
> >
> > you might want to get him to try installing 'ICS configuration'
from
here
> :
> > http://www.practicallynetworked.com/sharing/ics/ics.htm
> >
> > You can set specific ports to be forwarded to internal machines
(including
> > localhost)...gotta be worth a try.
> >
> > but maybe your already on to it :-)
> >
> > Neil
> >
> > ----- Original Message -----
> > From: "Mark McCall" <mark@xxxxxxx>
> > To: <ukha_d@xxxxxxx>
> > Sent: Monday, April 09, 2001 3:48 PM
> > 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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