networking

BitTorrent is a peer-to-peer file sharing protocol. Building a client teaches you about distributed systems, networking protocols, and file handling. ...

A DNS Forwarder is a nameserver that is used to resolve DNS queries locally instead of directly using the authoritative nameserver chain. Often they sit on the edge of a local area network and provide DNS resolution to the computers on the local network, reducing external traffic and speeding up external access by serving the answer from a local cache. ...

Build your own TCP/IP network stack. This project involves implementing the core internet protocols from scratch, including Ethernet frame parsing, IP packet handling, and TCP connection management with the three-way handshake. ...

A port scanner is an program that probes a host to identify open network ports. Malicious actors use port scanners to find network services running on a host in order to find and exploit vulnerabilities. Security analysts and network administrators use port scanners to confirm network security policies are being complied with. ...