Re: OT - Network Black Hole?

["Gareth Cook/STA/Lotus" <gcook@xxxxxxx>]

Mark

Make sure that the IP address of the NIC
in the server with the modem/NAT has NO gateway specified - otherwise NAT
will fail. Things to try : can you ping the www. site of the provider ? can
the nat box ping his machine ? 

G.

Gareth Cook Senior Engineering Specialist GeT IT Engineering,Networks,Security IBM SWG, Lotus Park, Staines, TW18 3AG

Office:  +44 (0) 1784 445 166 Mobile:  +44 (0) 7980 445 166 Fax:      +44 (0) 1784 499 166

Work: gcook@xxxxxxx Personal: g@xxxxxxx AOL AIM : theboyg Pager : gpage.csc1@xxxxxxx

----- Forwarded by Gareth
Cook/STA/Lotus on 09/04/2001 14:40 -----

Discussion
Main Topic

"Mark McCall" <mark@xxxxxxx>
Today 14:23

.

Subject: .	Re: [ukha_d] OT - Network Black Hole? .
Category:

Sorry...should have said.

He's running Win98SE and using ICS.  However, the machine he's trying
to
connect to IS the one with the modem on it.  This is almost identical
to my
setup (although I'm running Win2000) and I can VNC into my router machine
no
problem.

He's on BTInternet (same as me also).

Wierd!

M.


----- Original Message -----
From: <andy.powell@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Monday, April 09, 2001 2:20 PM
Subject: Re: [ukha_d] OT - Network Black Hole?


> Mark,
>
> My guess here is that he's running Win2k - Is that right?
>
> I suspect  it's his provider that's the problem... can you
provide more
> info on them - Can you connect to PWS on his machine if he runs
that?
>
> A.
>
>
>
>
>
> "Mark McCall" <mark@xxxxxxx>
> 09/04/2001 15:14
> Please respond to ukha_d
>
>
>         To:    
<ukha_d@xxxxxxx>
>         cc:
>         Subject:      
 [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.
>
> It's like there's an invisible firewall acting on his PC.  Last
night we
> closed everything down apart from Explorer and ICQ and got him to run
the
> "Shields Up" thing.  Below is the results of the ports
scan.
>
> Anyone any ideas?
>
> Thanks
>
> M.
>
>
> > > Port Service Status Security Implications
> > >
> > >  21 FTP Closed Your computer has responded that this
port
> > exists but is
> > currently closed to connections.
> > >
> > >  23 Telnet Closed Your computer has responded that
this
> > port exists but is
> > currently closed to connections.
> > >
> > >  25 SMTP Closed Your computer has responded that this
port
> > exists but is
> > currently closed to connections.
> > >
> > >  79 Finger Closed Your computer has responded that
this
> > port exists but is
> > currently closed to connections.
> > >
> > >  80 HTTP Closed Your computer has responded that this
port
> > exists but is
> > currently closed to connections.
> > >
> > >  110 POP3 Closed Your computer has responded that this
port
> > exists but is
> > currently closed to connections.
> > >
> > >  113 IDENT Closed Your computer has responded that
this
> > port exists but is
> > currently closed to connections.
> > >
> > >  139 Net BIOS Stealth! There is NO EVIDENCE WHATSOEVER
that
> > a port (or
> > even any computer) exists at this IP address!
> > >
> > >  143 IMAP Closed Your computer has responded that this
port
> > exists but is
> > currently closed to connections.
> > >
> > >  443 HTTPS Closed
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