Proxy server

Proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers.

Common uses case are:

• Monitoring and filtering
  • Content-control software usually based on different options:
    • User authentication
    • Risk scoring
  • Filtering of encrypted data
  • Bypassing filters and censorship
  • Logging and eavesdropping
• Improving performance

Proxy servers:

• Squid
• Reverse proxy: Nginx
• Varnish
• tinyproxy
• Load balancer
• Symantec proxySG and Advanced Secure Gateway (ASG)

Activities

• Use ncat as a basic http proxy server.
• Evaluate free open source proxy servers, such us Squid: https://en.wikipedia.org/wiki/Category:Free_proxy_servers and commercial ones like Symantec ASG (Advanced Secure Gateway)
• Evaluate content control software available in the market: https://en.wikipedia.org/wiki/Comparison_of_content-control_software_and_providers

Related terms

• Router
• Proxy ARP
• OWASP ZAP

See also

• Reverse Proxy: nginx
• Proxy servers: Squid, Reverse proxy, Nginx, HAProxy, Varnish, Load balancer, Load Balancer as a Service (LBaaS), Symantec proxySG and Advanced Secure Gateway (ASG), Traefik, tinyproxy, Proxyrack, Luminati Networks, SOCKS, Envoy Proxy

https://www.symantec.com/content/dam/symantec/docs/data-sheets/advanced-secure-gateway-s200-s400-s500-en.pdf