The format of an ESP-processed IP packet varies based on which IPsec transform mode is selected. In transport mode, the header is placed before the ciphered payload, and after the IP header. As such, ...

IPSec, both with AH and ESP, can be configured to work in two very different ways: transport mode and tunnel mode. With transport mode, AH or ESP is applied only to the packet payload, while the ...

A major security flaw in an IPsec protocol has been reported by the UK's National Infrastructure Security Co-ordination Centre (NISCC). According to NISCC, it is possible for an attacker to ...