IPSec how it works with NAT-T

NAT Traversal performs two tasks when implementing IPSec to traverse a NAT device:

1. Detects if both ends support NAT-T
2. Detects NAT devices along the transmission path (NAT-Discovery)

Links

https://community.cisco.com/t5/security-documents/how-does-nat-t-work-with-ipsec/ta-p/3119442

https://forum.networklessons.com/t/cisco-asa-site-to-site-ikev1-ipsec-vpn/825/75?u=lagapides