Glossary: Secure Infrastructure and Zero Trust
AH (Authentication Header)
Also written: AH, Authentication Header
The part of IPsec that proves a packet is genuine and unchanged but doesn't encrypt it. It travels as IP protocol 51 and breaks when NAT changes addresses.
Where the book teaches it
Related terms
ESP (Encapsulating Security Payload)NAT (network address translation)IP protocol numbers (50, 51)