Hello, Since more than a year we're doing EAP-TTLS to authenticate Wimax Users on Alcatel and Huawei NASes. Last week we've migrate Motorola authentication on freeradius. (no more radiator :-) ). But then we've experienced freeradius crash. Informations : Software : Freeradius 2.1.12 OS : Freebsd8.0p4 64bits Users : Huawei = 500 users -> 0,5 requests per second Alcatel = 1500 users -> 2 requests per second Motorola = 8000 users -> 5 requests per second The crash usually happen when home servers (ISP radius) does not respond, then the radius load goes up to 50/60 requests per second and after 40/50 minutes the radius crash. Logs : Tue Mar 6 00:40:17 2012 : Info: [eap_moto] Request found, released from the list Tue Mar 6 00:40:17 2012 : Info: [eap_moto] EAP/ttls Tue Mar 6 00:40:17 2012 : Info: [eap_moto] processing type ttls Tue Mar 6 00:40:17 2012 : Info: [ttls] Authenticate Tue Mar 6 00:40:17 2012 : Info: [ttls] processing EAP-TLS Tue Mar 6 00:40:17 2012 : Info: [ttls] eaptls_verify returned 7 Tue Mar 6 00:40:17 2012 : Info: [ttls] Done initial handshake Tue Mar 6 00:40:17 2012 : Info: [ttls] (other): before/accept initialization Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: before/accept initialization Tue Mar 6 00:40:17 2012 : Info: [ttls] <<< TLS 1.0 Handshake [length 0053], ClientHello Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 read client hello A Tue Mar 6 00:40:17 2012 : Info: [ttls] >>> TLS 1.0 Handshake [length 002a], ServerHello Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 write server hello A Tue Mar 6 00:40:17 2012 : Info: [ttls] >>> TLS 1.0 Handshake [length 0b56], Certificate Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 write certificate A Tue Mar 6 00:40:17 2012 : Info: [ttls] >>> TLS 1.0 Handshake [length 018d], ServerKeyExchange Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 write key exchange A Tue Mar 6 00:40:17 2012 : Info: [ttls] >>> TLS 1.0 Handshake [length 0004], ServerHelloDone Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 write server done A Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: SSLv3 flush data Tue Mar 6 00:40:17 2012 : Info: [ttls] TLS_accept: Need to read more data: SSLv3 read client certificate A Tue Mar 6 00:40:17 2012 : Debug: In SSL Handshake Phase Tue Mar 6 00:40:17 2012 : Debug: In SSL Accept mode Tbash: [65774: 2 (255)] tcsetattr: Interrupted system call Killed: 9 It seems this is more related to SSL issue ? Could you confirm this idea is correct ? I can compile the radius in gdb to get more information if this is usefull. Thanks Thomas