Help viewing ip camera online

I have lost the ability to view my ip cameras online. Now I get the message "This website not available"  Here is the setup: The camera is on a hardwired internal network with a static ip. The camera has port forwarding set. The Sonic Wall router has the named port listed in the Firewall Service Objects. I have a static out-facing ip address.  I am able to view the camera(s) on the internal network.

I must be missing something because this setup has worked for months but doesn't work now. I haven't knowingly changed anything.  To view the camera, I am typing: http//:XXX.XXX.XXX.XXX:XXXX with the appropriate outfacing ip:port
kentcraneAsked:
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JamesSenior Cloud Infrastructure EngineerCommented:
Externally check the port and see if you can telnet from the command prompt on that port. Are the cameras using TCP ip ports or UDP ports? Telnet sessions will not work on UDP ports, only for TCP ports.

Also has the external Public IP address changed for the cameras? Are you using a host record externally for the Public IP Address of the cameras?
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kentcraneAuthor Commented:
I don't know how to telnet. The cameras are using TPC ports.  The external IP address is static and has not changed.  Not sure what an external host record is.  

Sorry for the ignorance,  this is a small peer-to-peer operation where I have not had the need to use the functions that you are mentioning.
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Gajendra RathodSr. System AdministratorCommented:
If there is no change in external IP and firewall, I recommend to recheck new created port forwarding rules.

Please also check log files of firewall for more troubleshooting.

You can check open port using software like PortQryUI or port scanner external website.
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kentcraneAuthor Commented:
I used an online port checking site and it reported that the port was open. Interestingly, it reported another port that I supposedly have open in Sonic Wall as closed.  These are the 2 ports for 2 cameras that I monitor off-site. I could not find anything obvious in the firewall log files.  Not sure why I can't get through and not sure why one of the ports is reported as closed when they are both in the definition together in Sonic Wall.
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kentcraneAuthor Commented:
The problem has solved itself.  I don't know why 4 different handheld devises stopped having remote access to my cameras for about 2 weeks. I didn't make any changes, but one day they started accessing the cameras again. It's a miracle! Actually, it's frustrating.
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kentcraneAuthor Commented:
The problem solved itself without any intervention on my part. Very frustrating.
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