What ports does Letsencrypt use?
To use Let’s Encrypt, you need to allow outbound port 443 traffic from the machines running your ACME client. We don’t publish the IP ranges for our ACME service, and they will change without notice. For the “http-01” ACME challenge, you need to allow inbound port 80 traffic.
What port can I use instead of 443?
2 Answers. The port number is not “magic”, you can use any port from 1-65535 you like. There are only 2 conditions: Both the server and the client have to (agree to) use the same port number.
Can SSL use port other than 443?
Short answer: yes, you can! Long answer comes here: Can I use another port other than 443 for SSL communication? SSL is in no way tied to a single port value; in fact, as a protocol, it can be used over any transport medium, as long as that medium provides a bidirectional stream for arbitrary bytes.
Can SSL run on port 80?
And with the growing importance of online privacy, an SSL port is something you should get familiar with. Because data can be sent with or without the use of SSL, one way to indicate a secure connection is by the port number. By default, HTTPS connections use TCP port 443. HTTP, the unsecure protocol, uses port 80.
Can you use letsencrypt with ports other than 80 and 443?
My ISP blocks incoming access on port 80 and 443. I host a few webservers, plex, deluge, vpn, nextcloud, kloudspeaker, etc. all on different non standard ports. The thing is though I don’t have any of them secured with certificates. And it makes me feel uncomfortable sending passwords/hashes and data over http to my servers.
Are there any ports other than 80 and 443?
The biggest problem is the client’s need for ports 80 and 443 (forcing me to stop nginx when requesting/renewing certificates). I understand the desire to ensure the request is coming from the domain’s owner but surely any port < 1024 would suffice.
Is it possible to control ports other than 1024?
Ports <1024 are by default owned by root. Yes, root could control any port, but by default higher ports are open to anyone (and any software) on the system. Anything other than default will be untrusted, because in the real world very few servers will change those defaults.
Can a non root user listen on port 443?
Anything other than default will be untrusted, because in the real world very few servers will change those defaults. In the same way, port 443 can PROBABLY be trusted because, by default, it is controlled by root. Could a really bad sysadmin reconfigure the server in such a way that allows non root users to listen on 443?