I can't open port 25443 I am not used to using OS X as I normally use Windows but in my new job I have a machine with OS X 10.9.5 so I kind of have to use it. 

Anyways, I need to open port 25443 as I need it to access a website that runs there. I am not using the OS Firewall. I've been reading about it and I tried ipfw but it seems to be deprecated. I've been looking into pfctl but no luck. How could I open that port?

These are the outputted messages in different browsers:


Safari:


Chrome:


Opera:




The website is on a server in the Internet, is not accessed locally

I've tried to access other websites using HTTPS. It doesn't show any error and it show without any problem.
Not an answer, but I do not have any issue from my MacBook. I also don't see anything wrong with the certificate. Can you access other https sites?