HTTPS normally runs on port 443. Type an address starting with https://, your browser usually connects there to set up a secure connection.

The number’s not doing anything magical, a port’s just a numbered doorway telling a computer which service should get the incoming traffic. HTTPS just happens to have 443 as its doorway.

Why 443 Specifically

Just got assigned as HTTPS’s standard port. Regular HTTP uses 80, easy enough to keep straight. HTTP’s generally unencrypted, HTTPS adds encryption through TLS on top.

Your browser connecting to https://example.com reaches the server through port 443 without you seeing it. Server handles the connection, kicks off TLS, sets up a secure channel before anything sensitive gets exchanged.

You never see :443 in the address bar since browsers assume it automatically. Type it manually and you’re just telling the browser explicitly which port to hit.

What’s Actually Happening There

Sounds more complicated than it is. Browser reaches the server on 443, starts a TLS handshake, works out how they’ll communicate securely.

Server hands over its certificate, browser checks it against trusted authorities, confirms it matches the site. Connection’s secure, browser sends the actual HTTPS request through it.

Is It Always HTTPS Though

Not necessarily. Port numbers are conventions, not rules carved in stone. A server could technically run something else on 443, and HTTPS can run on a different port if the URL says so.

Still, sticking with the standard makes life easier. Firewalls expect it, browsers assume it, and website owners don’t need visitors typing weird port numbers to load a page.

What If It’s Blocked

Gets annoying fast. Browser fails connecting to an HTTPS site if a firewall’s blocking outbound traffic on 443, and nothing’s actually wrong with the browser itself, the connection’s just being stopped before it gets a chance.

That’s why port 443 matters beyond just being a number to remember. Network admins need to allow that traffic through, or secure sites just won’t load no matter how many times you refresh.

Can HTTPS Run On A Different Port

Yeah, could run it on 8443 for instance, address would just need to show that port explicitly, https://example.com:8443.

Totally valid. But for anything public, sticking with 443 is the sensible call since it plays nicely with browsers and standard network setups.

Honestly one of those boring conventions that deserves more credit. Type a URL, hit enter, and the whole port thing disappears into the background. Until it gets blocked, then suddenly it’s everyone’s problem.