Half OT: Windows XP won't connect

[Sergio Belkin]

Hi,
I have a freeradius with LDAP, supplicants use either EAP-PEAP or
EAP-TTLS. Sometimes, Windows (mainly XP) systems won't connect,
packages arrive only to Access Point but no to radius server.
Generally, solution is rebooting the AP but I wonder if I need to
tweak something on AP, this the result from tcpdump:

12:45:07.808808 00:22:5f:43:f4:31 (oui Unknown) > Broadcast Null
Unnumbered, xid, Flags [Response], length 6: 01 00
12:45:07.815594 02:25:9c:14:06:6e (oui Unknown) > 00:25:9c:14:06:6e
(oui Unknown), ethertype Unknown (0x886c), length 94:
        0x0000:  8001 007a 0000 1018 0001 0001 0000 0000  ...z............
        0x0010:  0008 0000 0000 0000 0000 0000 0000 0000  ................
        0x0020:  0016 0022 5f43 f431 776c 3000 0000 0000  ..."_C.1wl0.....
        0x0030:  0000 0000 0000 0000 3014 0100 000f ac02  ........0.......
        0x0040:  0100 000f ac04 0100 000 ac01 0000 0000  ................
12:45:07.819711 EAPOL start (1) v1, len 0
12:45:07.825580 02:25:9c:14:06:6e (oui Unknown) > 00:25:9c:14:06:6e
(oui Unknown), ethertype Unknown (0x886c), length 77:
        0x0000:  8001 0069 0000 1018 0001 0001 0000 0000  ...i............
        0x0010:  0019 0000 0000 0000 0000 0000 0000 0000  ................
        0x0020:  0005 0022 5f43 f431 776d 3000 0000 0000  ..."_C.1wl0.....
        0x0030:  0000 0000 0000 0000 0101 0000 0000 00    ...............
12:45:18.821489 IP 192.168.188.131.17500 > 192.168.188.255.17500: UDP,
length 127
12:45:20.417512 ARP, Request who-has 192.168.188.1 (00:25:9c:14:06:6c
(oui Unknown)) tell 192.168.188.187, length 28
12:45:20.417682 ARP, Reply 192.168.188.1 is-at 00:25:9c:14:06:6c (oui
Unknown), length 28
12:45:28.095608 ARP, Request who-has 192.168.188.131 tell
192.168.188.1, length 28
12:45:28.098097 ARP, Reply 192.168.188.131 is-at 00:1f:5b:bb:77:f2
(oui Unknown), length 28
12:45:31.165528 ARP, Request who-has 192.168.188.187 tell
192.168.188.1, length 28
12:45:31.169815 ARP, Reply 192.168.188.187 is-at 00:25:d3:74:49:ac
(oui Unknown), length 28
12:45:48.919456 ARP, Request who-has 192.168.188.1 (00:25:9c:14:06:6c
(oui Unknown)) tell 192.168.188.187, length 28
12:45:48.919612 ARP, Reply 192.168.188.1 is-at 00:25:9c:14:06:6c (oui
Unknown), length 28
12:46:04.655521 ARP, Request who-has 192.168.188.187 tell
192.168.188.1, length 28
12:46:04.656464 ARP, Reply 192.168.188.187 is-at 00:25:d3:74:49:ac
(oui Unknown), length 28
12:46:09.114950 EAPOL start (1) v1, len 0
12:46:09.115553 02:25:9c:14:06:6e (oui Unknown) > 00:25:9c:14:06:6e
(oui Unknown), ethertype Unknown (0x886c), length 77:
        0x0000:  8001 0069 0000 1018 0001 0001 0000 0000  ...i............
        0x0010:  0019 0000 0000 0000 0000 0000 0000 0000  ................
        0x0020:  0005 0022 5f43 f431 776d 3000 0000 0000  ..."_.1wl0.....
        0x0030:  0000 0000 0000 0000 0101 0000 0000 00    ...............
12:46:14.920025 ARP, Request who-has 192.168.188.1 (00:25:9c:14:06:6c
(oui Unknown)) tell 192.168.188.187, length 28
12:46:14.920228 ARP, Reply 192.168.188.1 is-at 00:25:9c:14:06:6c (oui
Unknown), length 28

Thanks in advance!
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Sergio Belkin http://www.sergiobelkin.com
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