IPsec (Internet Protocol Security) is a robust suite of protocols for securing Internet Protocol communications. It is powerful, highly configurable, and notoriously difficult to implement correctly. Configuring an IPsec tunnel manually involves a maze of Phase 1 and Phase 2 proposals, encryption algorithms, hashing methods, and Diffie-Hellman groups.
This is where Shrew Soft VPN Client (often just called "Shrew") stepped in. shrew soft
The primary selling point of Shrew Soft wasn't that it was shiny or modern; it was that it was . It was designed to be a universal translator for VPN concentrators. It supported a massive range of vendors out of the box, allowing a single client software to connect to a Cisco ASA just as easily as it could connect to a Juniper SRX. IPsec (Internet Protocol Security) is a robust suite