Fixed: VMware Horizon UAG "Unrecognized Request Detected" Warning

Fixed: VMware Horizon UAG "Unrecognized Request Detected" Warning Horizon UAG: Solving the 'Unrecognized Request Detected' Mystery Published: May 5, 2026 | Category: VDI Infrastructure & Security Overview of the Symptom In a VMware Horizon environment, administrators often encounter a yellow warning on the Unified Access Gateway (UAG) stating: "Unrecognized request detected." Curiously, the Connection Server remains healthy (Green), and the event often vanishes from the Horizon Console after a few minutes. 1. Root Cause Analysis This alert is a result of the UAG’s built-in security filtering. It triggers when the UAG receives traffic that does not conform to the expected Horizon protocol or HTTP standards. External Bot Scanning: As an edge device, the UAG is frequently hit by automated scanners (e....
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Is Port 22 Vulnerable to Tampering in Remote Desktops?

 Is Port 22 Vulnerable to Tampering in Remote Desktops?

Port 22, commonly used for SSH (Secure Shell) in remote desktops, can be vulnerable to tampering. While SSH itself is a secure protocol for remote system access and management, using the default port 22 makes it a well-known target for attackers.

Reasons for Vulnerability:

  • Brute-Force Attacks: Attackers can attempt brute-force attacks on port 22 to gain unauthorized access.
  • Port Scanning: Attackers can easily identify systems with open port 22 through port scanning.
  • Known Vulnerabilities: If there are known vulnerabilities in the SSH protocol or server software, attackers can exploit them to compromise the system.

Security Measures:

To mitigate these risks, consider implementing the following security measures:

  • Change the SSH Port: Modify the default port from 22 to another port to reduce the risk of being targeted.
  • Use Strong Passwords: Employ complex and lengthy passwords to defend against brute-force attacks.
  • Implement Public Key Authentication: Use public key authentication instead of passwords for enhanced security.
  • Configure Firewalls: Set up firewalls to restrict access to port 22 to specific IP addresses or ranges.
  • Keep SSH Server Software Updated: Regularly update SSH server software to patch known vulnerabilities.

By taking these precautions, you can significantly enhance the security of your remote desktop connections.

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