Problems connecting through internet

Hotel Puesta del Sol puestasol2 "at"
Fri, 18 Jan 2002 14:41:03 +0000

Thank you for your assistance.

We are using the same Internet provider for both machines and verified with
the ISP that they are not blocking any ports. Since we can reverse the setup
(ie have the client become the server and the server become the client) this
suggests that this is not an issue with the ISP. There is no firewall or
security software running on the server machine and no other programs are
trying to claim port 5900. A netstat -a reveals that port 5900 is unused
before winvnc is running and that it is open and listening after winvnc is

So I can4t telnet to that port and I cannot figure out why. Any help or
suggestions would be greatly appreciated! In the meanwhile, I will install a
new telnet client and hopefully it will give me a more informative error


----- Original Message -----
From: Michael Ossmann <michael.ossmann "at">
To: <vnc-list "at">
Sent: Thursday, January 17, 2002 6:35 PM
Subject: Re: Problems connecting through internet

> On Thu, Jan 17, 2002 at 04:49:58PM -0600, Hotel Puesta del Sol wrote:
> >
> > At this point, I think that the problem is linked to my inablity to
telnet to
> > the machine and I would appreciate it if anyone had suggestions as to
> > might be causing this.
> Yes, it sounds like you are correct.  This is most likely due to some
> sort of firewall configuration either on your part or your Internet
> provider's at either the client side or the server side.  You can
> probably determine whether it is on the client side or the server side
> by testing a telnet to port 5900 from a third Internet location.
> --
> Mike Ossmann, Tarantella/UNIX Engineer/Instructor
> Alternative Technology, Inc.
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