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).

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

2012年11月14日 · (Yes a similar thing could happen with sftp being replaced with ftp; but as its typically done in a separate app that saves the connection information this seems less likely -- to go to the ftp version the user typically has to manually type in a different port number).

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)

2021年3月19日 · Les serveurs Web, comme Apache et Nginx, écoutent généralement les requêtes des connexions HTTP et HTTPS sur le port 80 et 443, respectivement. Si votre politique pour le trafic entrant est configurée sur drop ou deny par défaut, il vous faudra créer des règles qui permettront à votre serveur de répondre à ces requêtes.

2020年3月8日 · Nmap cannot determine whether the port is open because packet filtering prevents its probes from reaching the port. The filtering could be from a dedicated firewall device, router rules, or host-based firewall software. These ports frustrate attackers because they provide so little information.