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Posts tagged: #networking

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Which ports should you block at the firewall?
A practical guide to ports you should never expose to the internet — SMB, RDP, Telnet, databases and more — with the risk and a safer alternative for each.
portsnetworkingfirewall
TCP vs UDP: what's the difference?
A clear comparison of TCP and UDP: handshakes, reliability, headers, real-world use cases, and why UDP fuels amplification DDoS attacks.
portsnetworkingprotocols
Well-known, registered, and dynamic ports explained
Understand the IANA port ranges: well-known (0-1023), registered (1024-49151), and dynamic (49152-65535), plus how the 16-bit port space and ephemeral ports work.
portsiananetworking