Generic_security_service_algorithm_for_secret_key_transaction, Generic_security_service_algorithm_for_secret_key_transaction Information, Generic_security_service_algorithm_for_secret_key


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GSS-TSIG (Generic Security Service Algorithm for Secret Key Transaction) is an authentication protocol for DNS, which is the extension to TSIG Protocol. The GSS-TSIG is a frame work of GSS-API to provide authentication, integrity and confidentiality.

GSS-TSIG (RFC 3645) uses frame work like Spengo with authentication protocol Kerberos or NTLM.

GSS-TSIG uses TKEY for exchange of key between DNS client and server in GSS-TSIG mode. For authentication(Kerberos) between DNS client and ADS of windows version, the AS-REQ,AS-REP,TGS-REQ,TGS-REP,these steps should take place for authentication and granting of ticket. after successful these steps the security context established between ADS (active directory server) and client.

Then remaining steps between DNS client and server for key exchange and authentication with DNS server.

The key exchange method can be done with TKEY in GSS-API mode and then dynamic updates to DNS server can take place with TSIG protocol.

Hence the GSS-TSIG is combination of TSIG, GSS-API (kerberos with spengo) and TKEY.

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