Remote Desktop Protocol (RDP) is a Microsoft proprietary protocol that enables remote connections to other computers, typically over TCP port 3389.Difference Between RDP Port 3389 and 443
Speaking of security concerns, sometimes you cannot use port 3389 on a particular network because it has been blocked by a network administrator. To get around this, you can redirect RDP traffic through port 443, which is dedicated to standard HTTPS traffic.TCP/IP
The current version of RDP will only run over TCP/IP. With customer feedback, other protocol support may be added in future versions.
Is port 3389 vulnerable : Cybercriminals actively target port 3389. They even initiate automated scans across the internet to hunt for it. Once they identify you're using it, they will launch a range of attacks, like brute force attempts to exploit the port's known vulnerabilities.
What is port 443 used for
Port 443 is the standard port for HTTPS, the secure version of HTTP. HTTPS is used by websites and other online services to protect your data from being intercepted by eavesdroppers. Imagine port 443 as a secure tunnel between your web browser and a website.
Does RDP use port 445 : To perform an RDP connection using the standard Remote Desktop Client, you need 445, 3389, and in some cases ports 135-139 (for printer / resource redirection and sharing).
Port 443 is important because it helps protect your data from being intercepted by cybercriminals. When you use HTTPS, all communication between your browser and the website is encrypted. This means that even if someone were to intercept your traffic, they wouldn't be able to read it.
Port 443 is used explicitly for HTTPS services and hence is the standard port for HTTPS (encrypted) traffic. It is also called HTTPS port 443, so all the secured transactions are made using port 443.
Does RDP use SSL or TLS
RDP Security and Encryption Levels
For example, if the client supports TLS 1.0, then the RDS infrastructure uses it. Otherwise, the RDS infrastructure uses the RDP security layer. The SSL method is by far the most robust approach for securing RDS sessions.Remote Desktop Protocol (RDP) itself can be configured to use both TCP and UDP for different aspects of the connection, such as multimedia and audio streaming. The usage of UDP for RDP is typically called "UDP transport" or "UDP-based transport."As we mentioned earlier, port 443 is part of the HTTPS protocol, being one of the paths that allow access to data packets. This port is vulnerable to SQL injections, cross-site scripting, DDoS attacks, and cross-site request forgery.
Port 443 is the standard port for HTTPS, the secure version of HTTP. HTTPS is used by websites and other online services to protect your data from being intercepted by eavesdroppers. Imagine port 443 as a secure tunnel between your web browser and a website.
Is it safe to have port 443 open : The website has enabled an SSL certificate and 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.
Should port 3389 be open : Port 3389 is the default port for Microsoft's Remote Desktop Protocol (RPD), and you should not have it open. Bad actors with port scanners and other tools actively look for open RDP ports on public IPs; it's a huge security risk.
What is port 139 and 445 used for
Ports 139 and 445 are used for 'NetBIOS' communication between two Windows 2000 hosts. In the case of port 445 an attacker may use this to perform NetBIOS attacks as it would on port 139. Impact: All NetBIOS attacks are possible on this host.
Port 443 is used explicitly for HTTPS services and hence is the standard port for HTTPS (encrypted) traffic. It is also called HTTPS port 443, so all the secured transactions are made using port 443. You might be surprised to know that almost 95% of the secured sites use port 443 for secure transfers.Opening ports 80 and 443 is necessary to allow incoming and outgoing traffic for web servers and web applications.
Can RDP use HTTPS : Use RDP Gateways (Best Option)
The RD Gateway server listens for Remote Desktop requests over HTTPS (port 443) and connects the client to the Remote Desktop service on the target machine.