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When using Canyouseeme.org it appears that my ISP is blocking every port. I am attempting to run a web server which works fine locally. I asked a previous question (here) regarding using different ports other than 80 but they all seem to be blocked.
Is this site a valid tool for checking on the ports or could they still be usable? Also, I am using a router, as well as an ISP provided modem. Could one of these devices be causing the problem?
EDIT:
And the final question remains. Why would the site say those high ports are blocked but then allow me to communicate over them?
Unless someone can verify I am just going to assume they don't care about those insanely numbered ports just like an ISP.
I got my web server to work globally by using a high port (5 digits) the site tells me it is blocked. Maybe the site just doesn't know what to do with crazy port numbers? – sealz – 2012-01-15T07:05:53.867
Considering the default port for a website is 80, so for example the true address of this website is superuser.com:80 your ISP is not actually blocking those ports, the website you reference cannot get a response back from say your Apache installation. – Ramhound – 2012-01-19T17:19:14.383