Port 443 is used to lớn secure communication travels between the client & the hệ thống.

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Have sầu you come here looking for answers khổng lồ the queries you have sầu about Port 443?

You have sầu come khổng lồ the right place.

This article will focus on HTTPS Port 443, how it works, what it protects, và why we need it.

Before that let’s talk a little about the port và how the port works.

About Port:

There are different types of network ports numbered differently, like Port 22, Port 80, Port 443, Port 465 và so on. With these ports, a computer directs traffic khổng lồ the correct places.

You may be aware that your system will reach out to lớn the host hệ thống when you visit a website.

The process seeks out a connection on either the HTTPhường or HTTPS port, whichever is linked with web traffic.

After the VPS connects to lớn the port, it sends back the trang web information, which your system will receive on the same port.

Ports see that the network connections make it to the right place. Also, they ensure that the traffic does not get messed up.

What is Port 443?

You must have visited the trang web that has HTTPS & a grey padlock in the browser’s address bar. It means a trang web connecting to the server over Port 443. The website has enabled an SSL certificate và it is secured. A normal website without SSL serves on Port 80. Port 443 indicates that the site is enough secured to carry online transactions without worrying about cyber theft. A trang web connecting to lớn the VPS over Port 443.

You can now understand that Port 443 is a website browsing port used khổng lồ secure web browser communication or HTTPS services.

Over 95% of secured websites use HTTPS via port 443 for secure data transfer.

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Source : Medium.com

The main object of the SSL handshake is lớn provide data integrity và data privacy to the information passing between the client and the server. The SSL handshake process includes multiple steps that take place between the client and the VPS & all process is done in the background. The exact steps depkết thúc upon the key exchange algorithm and supported cipher suites.

Client Hello: A client starts the process with a “Hello” message to the server. It includes the cipher suits và TLS/SSL version, thread of random bytes (client random).

Server Hello: The hệ thống sends baông xã with a “Hello” message, with an SSL certificate, the selected cipher suits from the sent danh mục by the client and a string of random bytes (VPS random).

Authentication: The client then checks the identity of the hệ thống with the provided SSL certificate. It is khổng lồ be checked with the available certificate authorities’ public key danh sách.

Premaster Secret: Once the identity of the hệ thống and the SSL certificate authentiđô thị is confirmed, the client sends an encrypted string of random bytes using the server’s public key. The public key is available with the SSL certificate. This string of random bytes can be decrypted with a private key of the VPS. This process of sending an encrypted string of random bytes is named Premaster Secret.

Decryption of Premaster Secret: The server receives the encrypted string of random bytes & decrypts it with its private key.

Session Key Generation: Now, both the client & the VPS create session keys using client random, VPS random, cipher suite and premaster secret.

Client Finished Message: The client sends an encrypted Finished message with the session key.Serve sầu Finished Message: The VPS once receives the message from the client, sends its own encrypted finished message with the session key.

Secured Connection laid down: The SSL handshake process thus completes, và the further encrypted messages will be exchanged using session keys.

Few Points khổng lồ consider: In the SSL handshake process, it is to lớn note that the SSL certificate should be active & not expired. The SSL certificate should be issued by a reputed certificate authority. The user should not face any SSL warning due to improper installation of the certificate. The installation error includes missing root or intermediate certificate or expired root and intermediate certificate.

HTTPS Everywhere: You can enable HTTPS Everywhere add-on from the Electronic Frontier Foundation (EFF), which is available for Chrome, Safari, and Firefox. Else, you can go khổng lồ the Extension section in Chrome browser and add it lớn the chrome browser.