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PPP Challenge Handshake Authentication Protocol
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PPP Challenge Handshake Authentication Protocol

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PPP Challenge Handshake Authentication Protocol

PPP Challenge Handshake Authentication Protocol

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  • 1. Follow Me on Youtube Channel zarigatongy http://youtube.com/zarigatongy
  • 2. PPP Challenge Handshake Authentication Protocol CHAP http://www.youtube.com/zarigatongy
  • 3. 3 Way Handshake Peer Authenticator 1. Sends Challenge Message 2. Peer Sends value calculated using one way Hash Function 3 .The authenticator checks the response against its own calculation of the expected hash value. If the values match, the authentication is acknowledged; otherwise the connection SHOULD be terminated. 4. Perform Step 1 to 3 at Random Interval http://www.youtube.com/zarigatongy
  • 4. Packet Format Exactly one Challenge-Handshake Authentication Protocol packet is encapsulated in the Information field of a PPP Data Link Layer frame where the protocol field indicates type hex c223 (Challenge-Handshake Authentication Protocol) http://www.youtube.com/zarigatongy
  • 5. Packet Format :: Code The Code field is one octet and identifies the type of CHAP packet challenge Response Success Failure http://www.youtube.com/zarigatongy
  • 6. Packet Format :: Identifier Used in Matching Challenges and Responses http://www.youtube.com/zarigatongy
  • 7. Packet Flow :: Challenge http://www.youtube.com/zarigatongy
  • 8. Packet Flow :: Response http://www.youtube.com/zarigatongy
  • 9. Packet Flow :: Success http://www.youtube.com/zarigatongy
  • 10. More Protocol Tutorials • • • • • • • • SSL Protocol Click here DHCPv6 Protocol Click Here CHAP Protocol Click Here ISCSI Protocol Tutorial Click Here BGP Tutorial Click Here RADIUS Protocol Click Here PPP Protocol Click Here PPPoE Protocol Click Here http://youtube.com/zarigatongy