Hi, I was successful to install Freeradius 2.1.10 and basic PAP authentication, Authentication against Active Directory was successful when I installed Freeradius for first time. But I had to deinstall and reinstall Freeradius 2.1.10 again due to some missing libraries. I am following the same deployingradius.com site for basic testing. I can start the server in debugging mode successfully using radiusd -X, which shows "Ready to process requests". But while doing basic radtest for PAP authentication it gives error: radclient: Failed to send packet for ID 85: (unknown error) radclient: no response from server for ID 85 socket 3 The last part of debug mode output when I run radiusd -X is: radiusd: #### Opening IP addresses and Ports #### listen { type = "auth" ipaddr = * port = 0 } listen { type = "acct" ipaddr = * port = 0 } listen { type = "auth" ipaddr = 127.0.0.1 port = 18120 } Listening on authentication address * port 1812 Listening on accounting address * port 1813 Listening on authentication address 127.0.0.1 port 18120 as server inner-tunnel Listening on proxy address * port 1814 Ready to process requests. The error I got using radtest is as follows: #radtest bob hello localhost 0 testing123 Sending Access-Request of id 85 to 127.0.0.1 port 1812 User-Name = "bob" User-Password = "hello" NAS-IP-Address = *This is ommitted for privacy, It shows my radius server IP address* NAS-Port = 0 radclient: Failed to send packet for ID 85: (unknown error) Sending Access-Request of id 85 to 127.0.0.1 port 1812 User-Name = "bob" User-Password = "hello" NAS-IP-Address = *This is ommitted for privacy, It shows my radius server IP address* NAS-Port = 0 radclient: Failed to send packet for ID 85: (unknown error) Sending Access-Request of id 85 to 127.0.0.1 port 1812 User-Name = "bob" User-Password = "hello" NAS-IP-Address = *This is ommitted for privacy, It shows my radius server IP address* NAS-Port = 0 radclient: Failed to send packet for ID 85: (unknown error) radclient: no response from server for ID 85 socket 3 I was successful to do basic PAP authentication, and also authentication against active directory before. But this time I am getting this error. Can anyone please tell me what might be wrong. Thanks, -- View this message in context: http://freeradius.1045715.n5.nabble.com/Error-Failed-to-send-packet-No-respo... Sent from the FreeRadius - User mailing list archive at Nabble.com.