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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello all,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> I am having a fragmentation problem on the following setup.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> I have hostapd running on PC A that has one wireless card acting as an Access Point (AP) and an Ethernet card that forms a secure tunnel to PC B that is in the same network with my AAA server. So it looks something like this : <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> wireless_client <---->[AP] hostapd_PC_A <---- secure tunnel ----> PC_B <---> AAA_Server<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> Now, when my wireless client initiates an EAP-TLS based network request (using wpa_supplicant) the 4 initial exchanges of Access Request and Access Accept packets happen just fine (8 packets in total). Then, the next Access Request (which seems to be containing a certificate) arrives at PC_B correctly but PC_B does NOT forwarding it to the AAA_Server, and replies to the hostapd_PC_A with an ICMPv6 error of “too big” to PC_A.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-indent:36.0pt'>This seems to me a fragmentation problem and occurs because hostapd_PC_A does not split the packet appropriately. I’ve seen the fragm_thershold on hostapd’s configuration file and set it to 1300 but it seems that it has no effect. <o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'><o:p> </o:p></p><p class=MsoNormal style='text-indent:36.0pt'>Does it work on IPv6 Packets? Does it work only for the Access point side or also to the packets that the NAS is forwarding to the AAA_Server?<o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'><o:p> </o:p></p><p class=MsoNormal style='text-indent:36.0pt'>I would really appreciate if your help. I can of course provide more info if needed.<o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'>Cheers,<o:p></o:p></p><p class=MsoNormal> Panos<o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'><o:p> </o:p></p></div></body></html>