[PlanetCCRMA] weird kernel error

[Janina Sajka]

Steve Arnold writes:
> 
> I just plugged my Z into my new RH7.3 setup (with the usbdnet patch on
> the 2.4.19-2.ll.acpi kernel).
> 
> I had a shell open with /var/log/messages in it, to see the what
> happened when I plugged it in, and below is what I noticed after a few
> minutes.  I had to run the hotplug script by hand, but the connection
> works fine, VNC came right up, and everything looks good.  But I never
> saw anything like this error with the 2.4.18 kernel.  Anybody else seen
> this, or know what it means?
> 
I'm not sure, but it looks to me like a firewall issue because of the
following pieces in your output:


> 
> Dec  7 22:06:04 rama /etc/hotplug/usb.agent: Setup usbdnet acm for USB
> product 4dd/8004/0
> Dec  7 22:07:39 rama kernel: ip_tables: (C) 2000-2002 Netfilter core
> team

This is right of the top of what you posted, of course. The 'netfilter'
and 'iptables' are strictly firewalling technology.

>From here on I'm speculating that the scripts are deciding whether or
not to trust this device. Since it works, I wouldn't worry about the
firewalling, necessarily, unless you begin to suspect
dataflow/throughput issues. 

Firewalling is a good thing, of course, but I wonder if music-making
needs the additional encumbrance. Obviously, if the machine is on the
net, it's a good idea. If it's on a private subnet within your own
office, I'd pull it off entirely. I suspect most machines are somewhere
inbetween, so it becomes a matter of assessing risk.