{"id":15684,"date":"2026-08-25T11:26:00","date_gmt":"2026-08-25T11:26:00","guid":{"rendered":"https:\/\/www.bodhost.com\/kb\/?p=15684"},"modified":"2026-08-27T11:53:46","modified_gmt":"2026-08-27T11:53:46","slug":"what-is-port-443-how-https-secures-web-traffic","status":"publish","type":"post","link":"https:\/\/www.bodhost.com\/kb\/what-is-port-443-how-https-secures-web-traffic\/","title":{"rendered":"What Is Port 443? How HTTPS Secures Web Traffic"},"content":{"rendered":"

When you open a website that starts with https:\/\/, your browser uses a network port to connect with the website\u2019s server. In most cases, that connection takes place through port 443.<\/p>\n

Port 443 is the default port for HTTPS traffic. It allows a browser and web server to create a secure connection using TLS encryption. This protection is important for websites that process logins, payments, customer details, contact-form entries, or any other private information.<\/p>\n

Understanding port 443 makes it easier to see how HTTPS works and why every public-facing website should use a valid SSL\/TLS certificate.<\/p>\n

What Is Port 443?<\/strong><\/h3>\n

A network port is a numbered endpoint that helps a server direct incoming traffic to the correct service. Servers use different ports for different types of connections.<\/p>\n

Port 443 is the standard port assigned to HTTPS. When someone enters an address such as https:\/\/yourdomain.com, their browser usually attempts to reach the web server through TCP port 443.<\/p>\n

Port 443 does not secure a connection on its own. Instead, it provides the standard route for HTTPS traffic. TLS, or Transport Layer Security, encrypts the data that travels between the browser and the server.<\/p>\n

Port 443 vs. Port 80<\/strong><\/h4>\n

Port 80 and port 443 both handle website traffic, but they used for different protocols.<\/p>\n

\n\n\n\n\n\n\n
Port<\/th>\nProtocol<\/th>\nEncryption<\/th>\nTypical Use<\/th>\n<\/tr>\n<\/thead>\n
80<\/td>\nHTTP<\/td>\nNo<\/td>\nStandard, unencrypted web traffic<\/td>\n<\/tr>\n
443<\/td>\nHTTPS<\/td>\nYes, using TLS<\/td>\nSecure web traffic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

For example, a visitor accessing http:\/\/example.com normally connects over port 80. If they visit https:\/\/example.com, the browser normally uses port 443 instead.<\/p>\n<\/div>\n

Most modern websites redirect visitors from HTTP to HTTPS. This ensures that users access the encrypted version of the site automatically.<\/p>\n

How Does HTTPS Work With Port 443?<\/strong><\/h4>\n

Before an HTTPS page is displayed, the browser and web server need to establish a secure connection. This process is known as the TLS handshake.<\/p>\n

Step 1: The Browser Connects on Port 443<\/strong><\/p>\n

When a visitor enters an HTTPS URL, the browser sends a connection request to the server through port 443. For this to work, the web server must be configured to accept HTTPS connections. The server firewall must also permit incoming TCP traffic on port 443. If the port is blocked or no web service is listening on it, the HTTPS website may fail to load.<\/p>\n

Step 2: The Server Provides Its Certificate<\/strong><\/p>\n

The server sends its SSL\/TLS certificate to the browser. The certificate contains details about the domain and helps prove that the server is authorised to use that website address. Although \u201cSSL certificate<\/a>\u201d remains the commonly used term, current secure website connections use TLS rather than the older SSL protocol.<\/p>\n

Step 3: The Browser Validates the Certificate<\/strong><\/p>\n

The browser checks several details before it continues:<\/p>\n