Glossary term
What is firewall? Meaning for developers
In DevOps
A rule list that decides which network traffic is allowed in or out. On EC2, that is the Security Group.
Learn it properly · DevOpsLesson 2: Networking Basics: IP, Ports, TCP/UDP and FirewallsHow a browser request actually finds and reaches your server. The layer Vercel hides completely, and the one you must understand before EC2 makes any sense.In Networking for Developers
A filter that allows or blocks traffic by address, port and direction.
Learn it properly · Networking for DevelopersLesson 6: Load Balancers, Proxies, CDNs and FirewallsLayer 4 and layer 7 balancing, reverse and forward proxies, CDNs, caching at the edge, and firewalls and security groups.