Squid

TCP

Proxy High Risk

Squid proxy — web caching proxy, open proxy abuse, SSRF

🔍 How to Scan Port 3128

nmap -sV -p 3128 target

nmap -sV -sC --script=banner -p 3128 target

nc -zv target 3128

Scan port 3128 with nmap -sV to identify the exact service and version
If Squid is not needed, close or firewall this port immediately
Check for default credentials if a management interface runs on this port
Use searchsploit squid to find known exploits
Monitor traffic on port 3128 with Wireshark or tcpdump for anomalies
Ensure the service is patched to the latest version to prevent known CVE exploitation

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