Re: Can't locate my computer via IP address and ping
From: Sooner Al (SoonerAl_at_somewhere.net.invalid)
Date: 10/19/04
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Date: Tue, 19 Oct 2004 09:39:11 -0500
Is it possible your home PC that is connected via DSL is also behind a firewall/NAT/router? Some DSL
modems, from what I understand, also act as routers. If that is true then you need to open TCP Port
3389 in order to use Remote Desktop.
Things to try...
1. On your home PC, the one you want to Remote Desktop into, run the ipconfig command from the
"Start -> Run -> cmd" command window. If the reported IP address is in the 10.X.X.X, 172.16.X.X or
192.168.X.X range then you may be out of luck.
2. If the reported IP address is not one of those in the private range, then you can run this telnet
test from a remote PC to see if you can pinpoint the problem...
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q187628
So the key is determining if the target PC is using a private IP address or if something is blocking
TCP Port 3389.
Additionally if your ISP assigns a dynamic IP to your router, then another solution is to setup an
account with one of the dynamic naming services that map a fully qualified domain name to the IP. In
my case I use a FREE service from No-IP.com. The No-IP.com software runs on my XP Pro box and on a
time schedule basis contacts the No-IP.com servers. The No-IP.com servers then know what your IP is
and maps that to a fully qualified domain name. That information is then propagated over the public
internet. You could then call the client PC using the fully qualified domain name. It works very
well for me when I call my home network using Remote Desktop.
Others...
http://www.remotenetworktechnology.com/Default.aspx?tabid=56
Please post additional questions concerning Remote Desktop to the
microsoft.public.windowsxp.work_remotely news group.
--
Al Jarvi (MS-MVP Windows Networking)
Please post *ALL* questions and replies to the news group for the mutual benefit of all of us...
The MS-MVP Program - http://mvp.support.microsoft.com
This posting is provided "AS IS" with no warranties, and confers no rights...
"Nathan" <Nathan@discussions.microsoft.com> wrote in message
news:F20A67A2-51A4-4DEF-A909-38EFEE210692@microsoft.com...
>I need help in the worst way!
>
> Hardware and system: 10 computers networked with MS Workgroups (no domain),
> three incoming DSL connections, one being used with eight computers (shared
> connection), with my personal computer and my wife's computer both having
> dedicated DSL connections (no connection sharing). Operating system on all
> computers is WinXP SP2. One of the problems may be related to the fact that
> we own and operate an orphanage in China and we have Chinese DSL connection,
> always on.
>
> I want to be able to access my computer via the internet in a remote desktop
> environment. I can use remote desktop just fine on my MS Workgroup network...
> computer to computer on the network... but when I attempt to access my
> computer over the internet I can't find my computer. It appears that either
> the IP address I am using to identify my computer is either not the real one
> or there is some other problem. To obtain my IP address I have tried many
> different methods i.e. 'ipconfig', 'whatismyip.com',
> 'www.dslreports.com/whois' etc. etc. All methods tell me I am using the
> correct IP address for my computer. I can also ping the IP from the computer
> and get positive results back. However, if I ping the same IP from another
> computer not in our network system, I receive nothing but the 'timed out'
> message.
>
> I have tried the Windows XP remote desktop with 'active X', pcAnywhere, VNC
> Server/client etc. etc. and nothing will find my computer.
>
> In my search for solutions to this I have seen occasional comments about
> proxy server problems. I also read in all documentation that if I can't reach
> my computer by ping then the remote desktop or any other type system (FTP or
> HTTP) won't be able to connect to my computer.
>
> 'www.myserver.org' has an automated port sniffer that also tells me my IP is
> the correct one, however when it sniffs the ports there are NONE available. I
> have gone into my XP SP2 firewall and opened every port I could think of in
> the exceptions module with no success. I have turned the firewall off with no
> success.
>
> If we lived in the States we could probalby contact our IPS and find out
> what is going on but here in China the only thing we can communicate about is
> how much we need to pay them each month.
>
> Oh.. I don't use a router of any kind. I use a common LAN hub for our
> networking. By the way our networking is set up properly and works fine.
>
> I have taken my computer out of the network and tried to access it from
> other computers... absolutely no success... it simply appears to not exist...
> so obviously I can't connect with any remote desktop system.
>
> Can anyone give me some additional help tips?
>
> By the way, I am not sure if I have given enough information for intelligent
> advice so if you need to contact me for additional information you can email
> me at nbell@homeofhope.org and I will also check back here frequently to see
> if there is some reply posted.
>
> Thank you so much.
> Nathan Bell
- Next message: Arc J. Thames: "Novell Client"
- Previous message: BAR: "Re: connected but can't share internet"
- In reply to: Nathan: "Can't locate my computer via IP address and ping"
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- Reply: Jack: "Re: Can't locate my computer via IP address and ping"
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