Re: Request for help: troubleshooting pcAnywhere with TZO + Linksys

From: TZO Support (
Date: 05/28/03

Date: 27 May 2003 16:29:09 -0700

Here is my suggestion:

1) Take out the router, hook up your desired PC Anywhere server
directly to the DSL modem. Check that you can get email and surf the
internet, then make sure that the DSL modem isnt also a "router", or a
NAT firewall. This could also be the case. If it's just a modem,
its doubtful it blocks any ports

2) Go to work and try to connect with the IP address. Does it work?
If not, then the problem is definitely not TZO or the Linksys router.
This is the fastest way to diagnose whats up, Your ISP could also
block ports

You can also try, it sniffs ports remotely, but only
TCP. This can determine if your ISP is blocking ports, which they
could be. Your work may also block outbound traffic on certain ports,
so that could also be an issue, best bet is to have another party test
the connection from another ISP in another geographical location

Hope this helps you some

TZO.COM Support (Mr. Land) wrote in message news:<>...
> Drat, spoke too soon, it still doesn't work.
> (Mr. Land) wrote in message news:<>...
> > Well, I can't explain why this worked, but I tried changing the
> > unreachable server's IP to a new static LAN number, reconfiguring the
> > Linksys to forward to the new number, and now everything works. Thank
> > you.
> >
> > (Mr. Land) wrote in message news:<>...
> > > Hello,
> > >
> > > I am hoping someone can help me troubleshoot a problem that started
> > > happening to me recently.
> > >
> > > I have a home server that I have been accessing from my office via
> > > pcAnywhere. Sometime within the past few days, I have lost the
> > > ability to connect, and I'm not sure how to troubleshoot this.
> > >
> > > My setup is as follows: I have several PC's sharing a DSL connection
> > > via a Linksys router. One PC is a Windows 2000 Server; the others
> > > various flavors of Windows and Linux. All PC's are configured to get
> > > their local LAN IP addresses from the Linksys, except the server,
> > > which has a static IP of On that server, I have three
> > > Web applications running on ports 8000, 8001 and 8080 (port 80 is
> > > blocked by my ISP.) I also run pcAnywhere host on that machine
> > > (configured with the default ports, 5631 and 5632).
> > >
> > > I use TZO dynamic DNS to access the server from the public Internet.
> > > The Linksys forwards the above-mentioned ports (plus a few others) to
> > > the static address of the server.
> > >
> > > From my office, I can access all 3 of the Web applications
> > > (, :8001, :8080) and I USED to be able to connect a
> > > pcAnywhere remote to the pcA host running on that same machine, but
> > > that no longer works.
> > >
> > > I've checked with the IS people where I work and they've assured me
> > > that they have not made any changes. I am not aware of any changes
> > > that I may have made.
> > >
> > > What troubleshooting I've done is as follows:
> > >
> > > Retrieved the current, assigned IP of the Linksys router from TZO and
> > > tried connecting pcA from my office using that IP: that didn't work.
> > > Tried connecting to the pcA host via a pcA remote from another one of
> > > the machines on my home LAN with pcA configured to use the server's
> > > static IP: that worked. Then tried connecting same using
> > > that worked, also! (Does that go out to TZO for
> > > resolution, or does the Linksys "remember" that it is ""?)
> > >
> > > It seems that on that last test, the pcAnywhere remote is indeed
> > > "going out" to the TZO nameservers, getting the name resolved, then
> > > successfully connecting the required ports (or maybe not?). It is
> > > only when I try to connect from my office that it fails (I have no way
> > > to test any other location on the Internet.)
> > >
> > > Is there some methodology and/or tools I could use to determine where
> > > the connection is failing?
> > >
> > > Thanks very much.

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