Is port 22 HTTP or HTTPS?

HTTPS uses port 443 and it uses the same data channel as HTTP.

So yes, port 443 is a good candidate for a port used by HTTPS. Yes, as long as the URL is an SSL connection then port 443 is a safe bet, but there are other ways to make your connection over port 80 (or 443 if you wish). The most common technique is to wrap your site in an IFrame or an AJAX call, which will usually end up making a request over port 80. Other techniques include using Javascript, using HTTP Cookies (if possible), and other methods.

What is port 8080 vs 443?

This question comes up on occasion.

A few minutes ago a question was asked and answered on ServerFault: So far as I understand, port 8080 is used to be able to hit the site while port 443 is used for HTTPS. So what's the difference? Are there times when one might be preferable to the other? I think the point you've missed is that port 8080 will (in the vast majority of cases) not be a different protocol than port 443. There is no difference in protocols that would make it preferable to use one or the other.

The "difference" is that port 8080 and 443 are reserved by IANA for particular purposes. See I don't know the history behind why port 8080 was chosen over 443, but it has been used by many programs including web browsers, eg Firefox and Internet Explorer. I personally use both ports 8080 and 443. On some servers I have both running at the same time, eg Apache2 with SSL support running on port 8080 and OpenVPN (TAP interface) on port 443. This makes testing a site's SSL support easier (as you can access both the normal HTTP and HTTPS sites at once), and it allows you to test your OpenVPN server from within your client, which can be an important step to getting your VPN configured correctly.

You can use either port 80 or 443 for non-secure and secure connections. To get around the problems of SSL connections to be made public (as in the browser connecting to a server through https://) port 80 is chosen because it's reserved for http connections.

The main reason for choosing one over the other is performance. For example when you are making an https connection to a website the whole SSL negotiation takes place. This means that a lot of time will be spent sending data over the internet, rather than your local network. As a result, unless you need to transfer an extremely large amount of data over http there is no need to choose http over https.

What is 8443 port used for?

The 8443 port is used by Webmin as a proxy server.

You can use it to make a network connection with a web site that is behind the same proxy. See Proxies for more information.

How do I make Webmin use the default proxy settings? Webmin does not know about the default proxy settings, but it can be configured to use them automatically. How do I use the proxy server with my browser? If you use a browser that uses the IP protocol (not the HTTP protocol), then Webmin will use the Internet proxy server at the IP address configured for that protocol. The IP protocol is used with a command-line tool called curl or wget, for example: will try to connect to the web site and send the request using the IP protocol. Webmin will try to use the default proxy settings that are configured for the IP protocol.

The HTTP protocol is used with most browsers, like Internet Explorer and Firefox. The HTTP protocol can be used with Webmin in several ways: The HTTP protocol is used by browsers to access the web site. Webmin will try to use the default proxy settings that are configured for the HTTP protocol. If you are using a browser that uses the HTTP protocol, Webmin will use the proxy server at the IP address configured for that protocol.

How can I configure the IP protocol? To configure the IP protocol, first check that the default proxy settings are correct. If you are using a browser that uses the IP protocol, check that the browser has the correct proxy settings.

Then configure the IP protocol as follows: Open the IP protocol configuration page. If you are not sure how to do this, see the Webmin documentation on How to set up proxy servers.

Set the Use default proxy setting to Yes. Select one or more IP protocols to use. The IP protocol will use the proxy settings for that protocol only.

Enter the proxy IP address and port for each protocol. Webmin will use the proxy settings configured for each protocol.

If you are using the HTTP protocol, then you can configure Webmin to try to use the proxy settings that you specify.

Is HTTPS always port 443?

I understand that to use HTTPS, the server must listen on port 443.

But what about if the port is not 443? For example, if I have a website running on port 80, but want to implement HTTPS, will I also need to set up a SSL certificate for port 443? HTTPS is an extension of HTTP. It doesn't rely on the "port" at all. However, it is commonly assumed that an HTTPS server will listen on port 443, so you'll find many websites that do not specify a non-default port and have the same effect.

This is not mandated by the protocol, nor is it a requirement for a valid SSL certificate. If you have a website running on port 80, you can have an HTTPS server on port 80 and it will be valid. An SSL certificate is used to verify that the site is who it claims to be. It is a public key cert that is signed by a certificate authority and a certificate is not valid without a certificate authority.

As long as the site has a valid certificate, it does not matter what port it is listening on. If the site is on port 80 and listens on port 80, then it can be considered a valid SSL connection.