CHAP, Challenge Handshake Authentication Protocol, is a 3-way handshake between two devices in a network to ensure security. CHAP can be either a One-way Authentication CHAP or a bidirectional CHAP. S...CHAP, Challenge Handshake Authentication Protocol, is a 3-way handshake between two devices in a network to ensure security. CHAP can be either a One-way Authentication CHAP or a bidirectional CHAP. Same as One-way Authentication but will then have the target validate the initiator. Can only be configured after One-way Authentication CHAP has been configured. Similar secret configuration to One-way Authentication CHAP
