CREST Practitioner Security Analyst (CPSA) Practice

Which port is used by the Squid Proxy?

1. 8080

2. 3128

3. 443

4. 80

The correct answer is: 3128

The Squid Proxy primarily uses port 3128 for its operations. This port is designated for proxy services and is commonly configured in Squid installations to handle HTTP and HTTPS requests. Using port 3128 allows Squid to act as an intermediary for web traffic, enabling caching and filtering, which improves performance and enhances security protocols in network environments. While port 8080 is often used for alternative web services and can be configured for proxies, it is not the default for Squid. Port 443 is utilized for HTTPS traffic, and port 80 is designated for standard HTTP traffic. These ports serve different purposes and are not primarily associated with the default Squid Proxy service. Thus, 3128 is the most recognized and utilized port for the Squid Proxy specifically.