Examkin

Question

Difficulty: EasyVirtual Private Networks and Remote Access Security

A network technician is configuring a external perimeter firewall to permit incoming remote access VPN connections for users utilizing the Secure Socket Tunneling Protocol (SSTP). Which transport protocol and port number combination must be opened on the firewall for SSTP connections to succeed?

  1. TCP port 443Answer
  2. B
    UDP port 443
  3. C
    TCP port 22
  4. D
    UDP port 500

Answer

TCP port 443
The choice stating TCP port 443 is correct because SSTP establishes a secure VPN tunnel by encapsulating PPP frames inside an SSL/TLS encrypted stream, which natively operates over TCP port 443.

Step-by-Step Solution

1
Identify the protocol operational mechanism for SSTP.
Secure Socket Tunneling Protocol (SSTP) transports PPP frames through an SSL/TLS channel.
SSTP uses standard web security standards to bypass strict network firewalls.
2
Determine the transport protocol and port associated with SSL/TLS tunnel creation.
SSL/TLS standard traffic runs over TCP port 443.
Firewalls typically permit outbound TCP port 443 for standard HTTPS traffic, making SSTP highly compatible.

Key Concept

SSTP VPN Protocol Specifications
Rate this question

Topics

Virtual Private Networks and Remote Access Security

More questions from this topic