Re: OT - Network Black Hole?

["Neil F" <automated@xxxxxxx>]

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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> > >
> > >
> > >
> >
> >
> >
> >
> >
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> >
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