IPv4 traffic in 802.2 LLC SNAP frames queued to netfilter ...

IPv4 traffic in 802.2 LLC SNAP frames queued to netfilter ...

[Jonothan Kane]

Hey all;

I've got 2 devices connected through a transparent bridge.
One of the devices uses the old Ethernet frame format as
datalink transport the other uses the common Ethernet II
format.  The Ethernet II formated frames are being
received by the netfilter connection tracking, while the
old style frames are not.

Is this normal ?

Are old style Ethernet frames just not sent to the netfilter
connection tracking system?

Thanks for any help or information.

J. Kane

Re: IPv4 traffic in 802.2 LLC SNAP frames queued to netfilter ...

[Patrick McHardy]

Jonothan Kane wrote:
> Hey all;
> 
> I've got 2 devices connected through a transparent bridge.
> One of the devices uses the old Ethernet frame format as
> datalink transport the other uses the common Ethernet II
> format.  The Ethernet II formated frames are being
> received by the netfilter connection tracking, while the
> old style frames are not.
> 
> Is this normal ?
> 
> Are old style Ethernet frames just not sent to the netfilter
> connection tracking system?
> 
> Thanks for any help or information.

Linux doesn't handle IP in SNAP and the bridge netfilter code
also doesn't.