Re: OT - Network Black Hole?

["Neil F" <automated@xxxxxxx>]

http://www.practicallynetworked.com/sharing/ics/icsconfiguration.htm

----- Original Message -----
From: "Mark McCall" <mark@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Monday, April 09, 2001 11:00 PM
Subject: Re: [ukha_d] OT - Network Black Hole?


> 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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