Hi everyone. I have a difficult problem that appears to have come out of the blue. After rebooting the Debian Wheezy server that hosts our RADIUS authentication this morning, suddenly FreeRADIUS v2.1.12+dfsg-1.2 is no longer working. I can successfully test the connection locally using 'radtest' like this: # /usr/bin/radtest customer password localhost:1812 5 localsecret -4 127.0.0.1 Sending Access-Request of id 218 to 127.0.0.1 port 1812 User-Name = "customer" User-Password = "password" NAS-IP-Address = 127.0.0.1 NAS-Port = 5 Message-Authenticator = 0x00000000000000000000000000000000 Framed-Protocol = PPP rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=218, length=38 Framed-Protocol = PPP Service-Type = Framed-User Framed-Compression = Van-Jacobson-TCP-IP I get the rad_recv response right away. When I test it from the same machine, but *saying* I'm connecting remotely, it apparently times out: www:/etc/freeradius# /usr/bin/radtest customer password localhost:1812 5 remotesecret -4 XXX.XXX.XXX.254 Sending Access-Request of id 34 to 127.0.0.1 port 1812 User-Name = "customer" User-Password = "password" NAS-IP-Address = XXX.XXX.XXX.254 NAS-Port = 5 Message-Authenticator = 0x00000000000000000000000000000000 Framed-Protocol = PPP Sending Access-Request of id 34 to 127.0.0.1 port 1812 User-Name = "customer" User-Password = "password" NAS-IP-Address = XXX.XXX.XXX.254 NAS-Port = 5 Message-Authenticator = 0x00000000000000000000000000000000 Framed-Protocol = PPP ^C The connection evidently times out and radtest retries, at which point I hit Ctrl-C. I get the same results when I actually test the connection from a remote site as when I pretend to make the connection from a remote site with -4 XXX.XXX.XXX.254. I can't really test *from* that site, since it's a Cisco AS5300. The only thing I can think of that *might* have changed was the Debian package version, but I can't even confirm that really, and it's in the old stable branch, which I believe is no longer supported with new patches. Nothing has changed in the FreeRADIUS configuration since about 2010. Any assistance would be appreciated!