I have installed freeradius 1.0.2 and radiusclient-ng.0.5.0 after the installation i am trying to run the test : radtest test test localhost 1649 testing123 User-Name = "test" User-Password = "test" NAS-IP-Address = MAINSIP NAS-Port = 1649 rad_recv: Access-Reject packet from host 127.0.0.1:1812, id=134, length=45 Reply-Message = "Hello, test with digest" I have file digest: --------------------------------------- User-Name = "test", Digest-Response = "631d6d73147add2f9e437f59bbc3aeb7", Digest-Realm = "testrealm", Digest-Nonce = "1234abcd" , Digest-Method = "INVITE", Digest-URI = "sip:5555551212@example.com", Digest-Algorithm = "MD5", Digest-User-Name = "test" in the debug of the radius server i receive that error: ---------------------------------------------------------------------- rad_recv: Access-Request packet from host 127.0.0.1:32842, id=115, length=56 User-Name = "test" User-Password = "test" NAS-IP-Address = 255.255.255.255 NAS-Port = 1649 modcall: entering group authorize modcall[authorize]: module "preprocess" returns ok modcall[authorize]: module "chap" returns noop rlm_eap: EAP-Message not found modcall[authorize]: module "eap" returns noop modcall[authorize]: module "digest" returns noop rlm_realm: No '@' in User-Name = "test", looking up realm NULL rlm_realm: No such realm "NULL" modcall[authorize]: module "suffix" returns noop users: Matched DEFAULT at 152 users: Matched test at 215 modcall[authorize]: module "files" returns ok modcall[authorize]: module "mschap" returns noop modcall: group authorize returns ok rad_check_password: Found Auth-Type Digest auth: type "digest" modcall: entering group authenticate ******ERROR: No Digest-Nonce: Cannot perform Digest authentication****** modcall[authenticate]: module "digest" returns invalid modcall: group authenticate returns invalid auth: Failed to validate the user. Thanks for the help