[Nottingham] Odd behaviour in KDE

Iain Lennon nottingham at mailman.lug.org.uk
Thu Aug 21 10:54:00 2003


Solution:

	Wireless network using WEP takes normal network packets, wraps them with its 
own encryption and then fragments the encrypted data as needed to transmit 
wirelessly. 
I needed to set the driver on the server to assemble all the fragmented WEP 
packets before decypting them.

its a setting in the wlancfg file which doesn't seem very well documented. A 
passing comment in the wlan-ng forum gave the clue..


I think thats it working all right now.
Thacnks for your help. 

Iain

On Wednesday 20 Aug 2003 16:15, Lee wrote:
> hmmm, I think we are getting closer to the problem, run etherreal on
> this segment?, or tcpdump, try setting your MTU to a smaller value (512)
> or less, see if this stop's the fragmentation, but 1500 mtu on ethernet
> or wireless ethernet should be fine and dandy really, I bet there is
> something fishy going on with the wireless driver, perhaps it's
> churinging/managaling packets, and the machine is misinterpting that as
> a smaller mtu on that segment? weird. I can't really fix this problem
> without doing 'my thing' with my tools, but..I'll try..
>
> hmm.. or you could look at it like this..
>
> Back again with the renegade master
> D-4 Damager, Power to the people,
> Back again, with the ill behavior
>
> yeah, your network has some of this ill behaviour that wildchild spoke
> about... but he's dead.. so he can't helpup with your fragmentation..
>
> send some netstat -r -n , whats you mtu???
>
> on a ethernet lan, with one segment, and no routers and default mtu of
> 1500 , you should never see layer 3 fragmentation of packets at any
> time, so.... dig deeper my friend., check that your wireless segment
> maxium packet size is correct (at your access point/ wireless card?)....
>
> it could be a drivers problem..need more info..
>
> interesting problem, aint mtu's fun...
>
> why is snort running?? on a workstation??? bizzare-o-matic?
>
> Laters,
> Lee
> 'Will work for food'
>
>
> 88> http://mailman.lug.org.uk/mailman/listinfo/nottingham
>
>
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-- 
Iain Lennon
SpR Emergency Medicine
Mid Trent Rotation