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Port 443 Blocked?

New Poster

Port 443 Blocked?

is comcast now blocking port 443? Just got a new modem installed and now my POS system cant talk on port 443. 

Silver Problem Solver

Re: Port 443 Blocked?


@iSkeat wrote:

is comcast now blocking port 443? Just got a new modem installed and now my POS system cant talk on port 443. 


I use ShieldsUp! to see what ports are blocked from the Internet.

https://www.grc.com/x/ne.dll?bh0bkyd2


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Expert

Re: Port 443 Blocked?

They don't block 443. Here's the list of what they do block;

 

https://www.xfinity.com/support/articles/list-of-blocked-ports

 

Check your router's firewall config / port forwarding settings.



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Expert

Re: Port 443 Blocked?

Bear in mind that a server had to actually be listening on that port at the time that test is run in order for it to appear as being "open".



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I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
New Poster

Re: Port 443 Blocked?

i have a computer with all ports open and it still says blocked. Also the modem/router is port forwarding 443 to that specific computer. ive even had a comcast rep check and make sure. Still blocked