Hi all,
I have implemented Freeradius with LDAP, all works without error but when the user log in the access time is too log (about 3,5 minutes).
This access time isn't platform depended (we use Windows and Mac client).
These are the log:

proxy.conf
proxy server {
              synchronous = yes
              retry_delay = 0
              retry_count = 0
              dead_time = 0
              default_fallback = yes
              post_proxy_authorize = no
}

realm LOCAL {
        type            = radius
        authhost        = LOCAL
        accthost        = LOCAL
}

realm NULL {
        type            = radius
        authhost        = LOCAL
        accthost        = LOCAL
}
realm localhost {
        type            = radius
        authhost        = 192.168.181.1:1645
        accthost        = 192.168.181.1:1646
        secret          = PASSWORD
        nostrip
}

------------------------
RADLAST


user3 000:chilli   192.168.182.123  Tue May  8 10:57 - 11:09  (00:12)   
user3 000:chilli   192.168.182.123  Tue May  8 10:57 - 10:57  (00:00)   
user3 000:chilli   192.168.182.123  Tue May  8 10:56 - 10:57  (00:00)   
user3 000:chilli   192.168.182.123  Tue May  8 10:56 - 10:56  (00:00)   
luca.tar 000:chilli   192.168.182.120  Tue May  8 10:43 - 10:49  (00:05)   
luca.tar 000:chilli   192.168.182.120  Tue May  8 10:43 - 10:43  (00:00)   
user3 000:chilli   192.168.182.119  Tue May  8 10:36 - 10:40  (00:03)   
user3 000:chilli   192.168.182.119  Tue May  8 10:36 - 10:36  (00:00)   
user3 000:chilli   192.168.182.119  Tue May  8 10:35 - 10:36  (00:00)   
user3 000:chilli   192.168.182.119  Tue May  8 10:35 - 10:35  (00:00)   
luca.tar 000:chilli   192.168.182.117  Tue May  8 10:35 - 10:35  (00:00)   
luca.tar 000:chilli   192.168.182.117  Tue May  8 10:34 - 10:35  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:33 - 10:34  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:33 - 10:33  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:32 - 10:33  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:32 - 10:32  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:31 - 10:32  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:31 - 10:31  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:30 - 10:31  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:30 - 10:30  (00:00)   
luca.tar 000:chilli   192.168.182.116  Tue May  8 10:29 - 10:30  (00:00)   
luca.tar 000:chilli   192.168.182.113  Tue May  8 10:11 - 10:15  (00:03)   
luca.tar 000:chilli   192.168.182.113  Tue May  8 10:11 - 10:11  (00:00)   
luca.tar 000:chilli   192.168.182.113  Tue May  8 10:10 - 10:11  (00:00)   
luca.tar 000:chilli   192.168.182.109  Tue May  8 09:45 - 09:52  (00:07)   
luca.tar 000:chilli   192.168.182.109  Tue May  8 09:44 - 09:45  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:43 - 09:44  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:43 - 09:43  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:42 - 09:43  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:42 - 09:42  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:41 - 09:42  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:41 - 09:41  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:40 - 09:41  (00:00)   
luca.tar 000:chilli   192.168.182.108  Tue May  8 09:40 - 09:40  (00:00)   
user2 000:chilli   192.168.182.101  Tue May  8 08:42 - 09:40  (00:57) 

----------------------------------------------

This is the client's log:

Macintosh:~ luca$ tail -f /var/log/system.log
system.log       system.log.0.gz  system.log.1.gz  system.log.2.gz
Macintosh:~ luca$ tail -f /var/log/system.log
May  8 10:35:08 Macintosh lookupd[1969]: lookupd (version 369.6)
starting - Tue May  8 10:35:08 2007
May  8 10:35:11 Macintosh kernel[0]: 11D beacon causing regdomain change
to CC 826
May  8 10:35:11 Macintosh kernel[0]: en1: 802.11d country code set to 'GB'.
May  8 10:35:11 Macintosh kernel[0]: en1: Supported channels 1 2 3 4 5 6
7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124
128 132 136 140
May  8 10:35:14 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:35:18 Macintosh mDNSResponder: Repeated transitions for
interface en1 (FE80:0000:0000:0000:021B:63FF
:FE00:0CDE); delaying
packets by 5 seconds
May  8 10:35:20 Macintosh configd[35]: posting notification
com.apple.system.config.network_change
May  8 10:35:20 Macintosh lookupd[1971]: lookupd (version 369.6)
starting - Tue May  8 10:35:20 2007
May  8 10:35:22 Macintosh mDNSResponder: Repeated transitions for
interface en1 ( 169.254.95.177); delaying packets by 5 seconds
May  8 10:35:44 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:36:15 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:36:45 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:37:15 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:37:45 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:38:16 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:38:47 Macintosh eapolclient[243]: eapmschapv2_success_request:
successfully authenticated
May  8 10:38:53 Macintosh configd[35]: posting notification
com.apple.system.config.network_change
May  8 10:38:53 Macintosh lookupd[1983]: lookupd (version 369.6)
starting - Tue May  8 10:38:53 2007

--------------------------------

Thanks!
Josh