What is an SSL certificate port [An Ultimate Guide]


The SSL port is the number associated with the type of connection being made over the Internet

SSL or Secure Socket Layer is becoming increasingly important as more and more people discover cyber threats. While some have fallen victim to cyber attacks, others are becoming cautious by observing what is happening around them.

An SSL certificate provides the necessary protection and security by creating a secure connection between the user and the website. They create an encrypted channel between the two parties while maintaining privacy and data integrity. An SSL port connected to SSL maintains privacy between the server and the client. Even if a website has obtained the SSL certificate, an SSL port certificate is required to ensure the connection is private and secure. Let’s learn more about the importance and usage of SSL port certificates in the following sections.

What is an SSL port?

There are basically five layers between a client and the server. These are;

  1. Physically
  2. Data Connection
  3. network
  4. transport
  5. application

Port numbers in the SSL port are provided by Layer 4 (Application).

There are a large number of ports on the Internet, numbered according to their characteristics. For example, the websites that have HTTPS added in front of their address mean that they have an SSL certificate. Also, the HTTPS certificate port number is 443.

However, an unsecured connection with only HTTP in the URL uses port 80. A connection can still be established between the client and the server without an SSL certificate, but a port number is essential to ensure the security of that connection.

Common TCP ports used in the web world

port numbers Use and Attribution
0 to 1023
Known Ports
Port numbers between 0 and 1023 are assigned by the Internet Assigned Numbers Authority (IANA). These are reserved for common TCP/IP systems and connections.

These port numbers allow clients to discover and locate server application processes.

1024 to 49151

User or registered ports
These port numbers have a special purpose and are commonly used by web developers or agencies. They are used to establish a secure connection when the companies offer some special services to their customers.
49152 – 65535

Dynamic Ports
These ports are not assigned to any specific entity. They are not even controlled or managed and only serve as temporary ports.

We can also call them private ports. Web developers and other agencies freely use these ports for temporary purposes.

Is there a difference between HTTPS port and TLS port?

No, these two terms represent the same logic. HTTPS is related to SSL, which means that a website or platform that has obtained their SSL certificate can add the extra “S” at the end of HTTP to emphasize the fact that the connection is actually private.

TLS is just a replacement term for SSL. Therefore, TLS and SSL have the same meaning. Therefore, the HTTPS and TLS ports also represent the same logic. Web developers and users use the term SSL widely enough that it has become a habit to use the same terminology with TLS as well.

So when you read HTTPS port 443 or SSL certificate port 443, the meaning and functionality remain the same.

Ports used for various purposes on the web and email

The following list will help you become familiar with the common port numbers used on the Internet. We don’t need to know every port number on the list, but it’s important to identify a few of them to better understand how the web world works.

Ports used for web processes and transactions

port number What does it represent?
80 Port number 80 means an unsecured connection. So when we transmit information about websites from an unsecured connection, it happens over port 80.
443 The secured connections that establish privacy between client and server are represented by port 443. This is the highest level of encryption used in everyday connection processes.
21 Port 21 is dedicated to FTP (File Transfer Protocol).
990 If the FTP servers and connections are additionally secured by SSL/TLS encryption, port 990 is used.
21 Port number 21 is used to ensure privacy when a user logs into their account. Besides, it is also used in Secure Shell for file and port transfers.
3306 Port 3306 is the default port used in MySQL logging systems.

Ports used when sending and receiving email

port number What does it represent?
110 POP3 protocol uses this port number when users want to access unsecured email.
995 Port 995 is used in email transactions for connections secured by SSL/TLS protocols.
143 Port 143 is associated with another protocol called Internet Message Access Protocol (IMAP4) and is commonly used to recover emails.
993 If users want to connect to an IMAP server with SSL/TLS security, port 993 is used.
These three ports are used for Simple Mail Transfer Protocol (SMTP) forwarding. This means that when a user sends emails individually or in bulk, they use one of these three ports.
465 Port 465 is also used in SMTP relaying with the added security of SSL encryption. Here the SMTP becomes SMTPS due to the added encryption standard.

cPanel port numbers and functions

port number What does it represent?
2082 In cPanel, this port number represents a situation where an unencrypted connection is made from the client to the server using HTTP. Since this is not an SSL certificate, the connection is forwarded to port 80.
2083 In 2083 we established and established a secure connection between the web server and the client by forwarding the request to HTTPS port 443.
2086 This port number represents the incoming WHM TCP connection that gives users administrative control and allows them to manage multiple cPanel accounts.
These two ports have the same function as port 2087 but provide an additional layer of protection with the SSL certificate.
2095 This port number represents the incoming TCP connection from webmail, but it is unsecured.
2096 Following the same principle as with an SSL certificate, this port is used for incoming webmail SSL TCP connections.

How does an SSL certificate work?

We know that an SSL certificate makes the connection between client and server more secure. This encrypts every communication between browser and server.

Encrypted connections are almost impossible to crack and no eavesdropping takes place. Domains that receive the SSL certificate are authenticated to interact with their users, and the users in turn interact with trust and are willing to share confidential information.

For this reason, it is necessary to verify the SSL certificate with a domain, especially for those who take care of banking and online shopping. The certificate provides two things to the domain;

  • A digital certificate to establish his identity.
  • Verifies the identity and public key of the domain.

A connection with an SSL certificate is established in four steps;

  1. When a user types the website name in the address bar, the browser attempts to connect to the domain. The browser then sends a request to the domain’s server to establish a connection.
  1. After receiving the request, the web server sends a copy of its SSL certificate to the browser.
  1. The browser then checks the SSL certificate for verification purposes. Basically, the browser checks whether it can trust the SSL certificate. The certificate sends the message to the web server when checked out.
  1. The web server then sends back a digitally signed confirmation. This will authenticate the browser to start an SSL encrypted session.

Post this, every kind of information, data and connections shared between the client and the server are encrypted.

Why is the SSL port important for a secure connection over the Internet?

Establishing a connection through the SSL port is vital for any type of communication that takes place over the Internet. At a time when cyber threats and hacking attempts are on the rise, you shouldn’t risk connecting to an unsecured server and exchanging information with it, only to be at the hacker’s mercy. Here are some points showing the importance of a secure SSL port.

  1. Website Security: The HTTPS or SSL certificate provides an extra layer of security. It protects you from data theft and prevents intruders from accessing sensitive information. Without SSL, it’s relatively easier for hackers to break into the network and access your credentials. HTTPS ensures sensitive information is encrypted and hidden from hackers’ view.
  1. Compliance with PCI: Organizations and websites dealing with financial transactions and information are required to have PCI DSS. And they can only be authenticated with PCI DSS if they have HTTPS or SSL certificates. Knowing the HTTPS and SSL certificate, users can trust the platform they interact with and share their information conveniently.
  1. Better speed and SEO: An HTTPS certificate not only tightens the security noose, but also improves website speed. A website’s ability to load faster is critical to retaining visitors. Besides, websites with higher speed also get better website ranking.

In addition to speed, search engines also favor websites and platforms with SSL certificates. Because of this, they get a higher rank than websites that don’t have an SSL certificate.

SSL certification is a game changer in the web world. And we don’t stop there. As we continue to move forward, better encryption standards will be created and disseminated for public use.

Currently, the best encryption standard is AES-256 bit, and it can take 2.29*10^32 years with the world’s best and fastest supercomputer. And systems are being developed to further improve it.


SSL certificate ports are one of the ways to establish and work with a secure connection over the Internet. With websites, browsers, servers, applications, and almost every digital channel that uses the Internet, having the right configurations in place is essential to keeping users safe. An SSL certificate gives the clients and servers the ability to connect and work with an airtight, secure connection.

SSL ports define the level of security of the connection and how effective the measures taken are. It’s important to understand the importance of an SSL certificate and how SSL ports are used to protect sensitive information that falls into the wrong hands.

The post What is an SSL certificate port [An Ultimate Guide] appeared first on the CheapSSLWeb.com Blog.

*** This is a Security Bloggers Network syndicated blog from the CheapSSLWeb.com blog written by the CheapSSLWeb.com blog. Read the original post at: https://cheapsslweb.com/blog/what-is-ssl-certificate-port


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