Hi all, I'm facing a really strange problem. The setup: IAS+RRAS on Windows 2k3 server - FW with proxy - FREERADIUS on linux There are to clients for the freeradius: - Linksys WRT300N ( 802.1x + WPA2 on wifi ) - Cisco 3750G ( 802.1x on wired port ) The freeradius is configured as a proxy for IAS, and with the Wrt300N and the wifi it's working fine! But with the Cisco I'm getting this: Thu Jan 15 11:19:36 2009 : Error: WARNING: Malformed RADIUS packet from host [fwproxy_IP]: received 1500 octets, packet length says 1581 Thu Jan 15 11:19:41 2009 : Error: WARNING: Malformed RADIUS packet from host [fwproxy_IP]: received 1500 octets, packet length says 1581 Thu Jan 15 11:19:47 2009 : Error: WARNING: Malformed RADIUS packet from host [fwproxy_IP]: received 1500 octets, packet length says 1581 Thu Jan 15 11:19:50 2009 : Error: Rejecting request 21 due to lack of any response from home server [fwproxy_IP] port 1812 The tcpdump on the freeradius server shows: 11:19:47.389332 IP [freerad_server_ip].1814 > [fwproxy_ip].1812: RADIUS, Access Request (1), id: 0xdd length: 225 11:19:47.392714 IP [fwproxy_ip].1812 > [freerad_server_ip].1814: RADIUS, Access Challenge (11), id: 0xdd length: 1472 Sniffing on the FW's inside leg, the IAS sends back Access-challenge for the Access-Request. What's the matter? Cheers, Tamas