Opening firewall to incoming port 443

Posted by jrdioko on Super User See other posts from Super User or by jrdioko
Published on 2012-07-03T21:10:03Z Indexed on 2012/07/03 21:18 UTC
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I recently set up the ufw firewall on a Linux machine so that outgoing connections are allowed, incoming connections are denied, and denied connections are logged. This seems to work fine for most cases, but I see many denied connections that are incoming on port 443 (many with IPs associated with Facebook).

I can open that port to incoming connections, but first wanted to ask what these could be. Shouldn't HTTPS requests be initiated by me and be treated as outbound, not inbound connections? Is it typical to open incoming port 443 on consumer firewalls?

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