The short answer is this: When you connect on port 443, the entire handshake happens on port 443. This can be done in a secure fashion as a result of the Diffie-Hellman process, which allows public keys to be exchanged in the open without fear that the communication secret that results from the communication might be calculated or guessed by an attacker.

2017年4月5日 · If no, then Apache isn’t listening on port 443, which probably is a wrongly configured VirtualHost, so let’s see the configuration for your sites. Reply Vijay Maurya • April 5, 2017

2024年10月24日 · Allow All Incoming HTTPS (port 443) HTTPS typically runs on port 443. If your default policy for incoming traffic is set to drop or deny, you’ll need to create a UFW rule to allow external access on port 443. You can use either the port number or the service name (https) as a parameter to this command. To allow all incoming HTTPS (port 443 ...

2018年3月6日 · Since port 443 is the default port for HTTPS content, censors are deterred from blocking the port altogether since it would mean blocking all of HTTPS traffic, which is a very high cost for just blocking VPNs disguising their traffic as "HTTPS".

2015年10月28日 · @SteveSether: it depends on the semantics of "standards". In TCP/IP the port is disconnected from the service (anything can run anywhere) and this is used in many cases (I run some SSH servers on 443 and 9856, for various reasons).

Port 443 is the default port for HTTPS communication using SSL/TLS. As such, if you can reject and/or redirect traffic on port 80 (the default unsecured HTTP port) and reject all other ports, and if you can trust your web server OS's TCP/IP and TLS implementations, this scheme is as safe as any publicly-accessible computer communications endpoint can be made, from a hardware/firmware perspective.

I think your professor meant that a service using SSH or SSL would internally interact with the SSH and SSL services running on ports 22 and 443 respectively. It does not however mean that a service, say HTTP (whose port is 80, usually) runs on 443 when serving with SSL/TLS enabled. Also, port numbers vary.

2020年9月2日 · In many cases, the software you use specifies the port for you. For example, when you connect to https://digitalocean.com, you’re connecting to the digitalocean.com server on port 443, the default port for secure web traffic. Since it’s …

2021年7月9日 · Web servers, such as Apache and Nginx, typically listen for requests on port 80 and 443 for HTTP and HTTPS connections, respectively. If your default policy for incoming traffic is set to drop or deny, you will want to create rules that will allow your server to respond to those requests. Allowing All Incoming HTTP

2016年1月6日 · It may be an indication of malicious communications attempting to disguise themselves as DNS / HTTP / HTTPS traffic given, as you mentioned, the connections from port 53 <-> 80/443. If it were a real scenario, you may then want to poke around and see which process is listening on port 53 (By adding the "-o" option to the netstat command)