[Chilli] client MTU too small for SSL requests

[Liu Wenmao]

Hi list:

I recently use coova-chilli as wifi auth service on my openwrt box, http
web seems ok, but some of my client can not rearch some https webs, which
are random, for example, my android phone can not load one https page, but
my ipad can.

After I googled I find that it may be a MTU problem, so I set a small MTU
value,say 1400 for the android phone, so it can load the https page now.
But I can not change every mobile phone because it is not convinient, so I
probably should change the chilli settings. But I do not know how, any
someone help?

I notice that all interfaces of the openwrt system has MTU 1500, and none
of them drop any packets from 'ifconfig' cmd output.

I tcpdumped the packets and find that the key exchage finishes, but when
client sends requests, it seems to have no responses because it retransmit
the packets for 3 more times, but there are no error icmp responses from
chilli during the retransmission,which I think should occur when the router
find a too big segment, is it a bug?

Wenmao Liu
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