Dictionary · Protocols and Ports
IPsec
IPsec — Internet Protocol Security
Encryption · Advanced
A suite that authenticates and encrypts packets at the network layer. It can protect traffic between two hosts or build a tunnel between two networks.
Unlike web encryption for one application, this protects IP packets themselves. Organizations use it for site-to-site tunnels and for some remote-access designs.
Example: Two office firewalls maintain a tunnel so traffic between 10.1.0.0/16 and 10.2.0.0/16 crosses the Internet encrypted.
Common misconception
- It is not a single port you can memorize like a web service. Different parts use specific protocols and, for one key-exchange method, UDP 500 and 4500.