Nokia E65, E51 connection problem with bridge and madwifi (Re: help urgently needed!)

[Sven Nielsen]

I did not try using NAT since this requires setting up dhcp on the
embedded AP devices. It might work without the bridge, but I have to use
some kind of bridge setup since, well, I need a LAN Access point and not
a router here. ;-)

At a guess, problem is Nokia together with madwifi, as WEP (no hostapd)
and WPA exhibit the same connection problem (Nokia outbound ok, inbound
to Nokia fails)


I will try to get some info on the madwifi chat tomorrow. 
Still, the problem is most probably caused by the Nokia phones since my
laptop has a reliable and stable connection, so I can only hope the guys
at madwifi know this problem already and know how to solve it.

regards,
sven



Am Sonntag, den 02.03.2008, 21:03 +0900 schrieb Saber Zrelli:
> Hi Sven,
> 
> Your problem could be caused by the bridge setup. Have you tried using NAT ?
> 
> > hi everyone,
> >
> > we are supposed to roll out about 20 new access points on our first test
> > site in a few days, however, I haven't quite got them working yet.
> > The APs are small Alix mainboards equipped with two Atheros miniPCI
> > cards (madwifi driver). System is minimal Debian stable.
> >
> > bridgeutils version is 1.2
> > hostapd version is 0.5.5
> > (both from stable debian package)
> >
> > The current major problem at hand is as follows:
> >
> > Most important scenario for this test site is this:
> >
> > Asterisk Voip server <--> AP <--> Mobile SIP client (Nokia E65 / E51)
> > (Everything in one LAN)
> >
> > We are using a bridge setup, with e.g. br0 containing eth0 and ath0 on
> > the APs.
> >
> > Using no, WPA, or WPA2 encryption (with PSK) the mobile clients connect
> > with no problem, they register to Asterisk Voip server, I can start a
> > call, I can browse the internet on the mobiles, too.
> >
> > However, using CCMP algorithm in hostapd I cannot ping or reach the
> > mobiles, neither from LAN nor from AP directly, but mobiles can reach
> > PCs behind AP (wired) with no problem.
> >
> > Using no encryption, everything is _almost_ fine. Ping loss pinging the
> > mobiles is about 6% at most.
> >
> > Using TKIP, it seems to work at first, like with no encryption (network
> > reachable from both sides of AP), but after a few calls (udp
> > connections), it is the same as with CCMP. Mobile clients can reach the
> > net without problems, but the wireless clients are not reachable through
> > the AP.
> >
> > And finally the weirdest: as long as call is actively transmitting
> > (active UDP connection), the mobile client is fully reachable! with no
> > ping loss at all, no matter what encryption is used! But, it vanishes
> > instantly when the call ends.
> >
> > I wrecked my brain for 3 days now, it might be something with mtu sizes
> > different for eth0 and ath0 (1500 vs 2290) it might be related to MAC
> > addresses, it might be something totally different.
> >
> > Any help greatly appreciated, really! ;-)
> >
> > I can compose detailed information and logs instantly if someone thinks
> > he might know the solution to this.
> >
> > Best Regards
> > Sven Nielsen
> >
> >
> >
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> >
> 
>