Does Verizon FiOS block Port 5900?

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Does Verizon FiOS block Port 5900?

Okay, so I've got a computer with absolutely no ports blocked, I've shut off the firewall, the thing is behind a router, but set as DMZ. I still can't control/observe. I can use every other feature of ARD except control/observe, and screen sharing. I've confirmed that port 5900 is not responding on the computer in question, despite the above extreme trouble-shooting measures. The computer in question is not on my local network, it's in another state with Verizon FiOS internet. Does Verizon block port 5900, or should I suspect there is something else going on with the router or ARD?

If port 5900 is being blocked by the ISP, can I use router/ARD magic to change what port actually gets used, while still making ARD happy?

I'm kind of going crazy here...

iMac G5, Mac OS X (10.4.11), ARD 3.3.1

Posted on Oct 27, 2009 7:01 PM

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Answer 1

Oct 29, 2009 7:48 AM in response to fakecubed

Welcome to the Discussions,

You will have to check with Verizon to see if they pass port 5900 or not. I suspect that may be the case.

While I can't tell you how to change the port, I can tell you that many administrators use port 80 tools like gotoassist.com or logmein.com for system on networks out of their control. Of course you won't be using ARD, but it is much easier than changing the default port settings on every machine.

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Answer 2

Nov 3, 2009 10:27 AM in response to fakecubed

I am on Verizon FIOS, and control/access other machines on different ISP (Comcast, in particular), with ARD, including view/observe, which uses VNC and port 5900. Now I would assume that means generically, Verizon is not blocking 5900 (I also use VNC to connect back to my home machine from work).

So not offering a solution or suggestion, but just saying I doubt they are blocking that port. I am in the New England area, fwiw.

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