Hi, I added following lines in eap.conf inside eap block. sim { } I added following lines to users file. eapsim Auth-Type := EAP, EAP-Type := SIM EAP-Sim-Rand1 = 0xabcd1234abcd1234abcd1234abcd1234, EAP-Sim-SRES1 = 0x1234abcd, EAP-Sim-KC1 = 0x0011223344556677, EAP-Sim-Rand2 = 0xbcd1234abcd1234abcd1234abcd1234a, EAP-Sim-SRES2 = 0x234abcd1, EAP-Sim-KC2 = 0x1021324354657687, EAP-Sim-Rand3 = 0xcd1234abcd1234abcd1234abcd1234ab, EAP-Sim-SRES3 = 0x34abcd12, EAP-Sim-KC3 = 0x30415263748596a7 In src/tests/eapsim-03 there is one extra parameter, Autz-Type:=EAP, for which I am getting some error while enabling radiusd. So I removed Autz-Type:=EAP from first line. Is that OK? I want to know how I to get above Hex values? -- Regards & Thanks Raghavendra. S