[CentOS] Re: rolling your own kernel - guidelines?
amyagi at gmail.com
Thu Oct 4 22:47:49 UTC 2007
On 10/4/07, Florin Andrei <florin at andrei.myip.org> wrote:
> These systems will be minimal installs - even less than the default
> minimal that can be achieved via Anaconda, plus a couple custom
> packages. Think - home-made appliances, or sorts. There will be very,
> very few things running on these machines.
> The problem with kernel 2.6.18 is that netfilter has the old (I mean,
> current) braindead conntrack that is loaded when NAT is used.
> Now, configure pktgen full blast over a gigabit link, small UDP packets,
> set it to generate random source IPs (DDoS simulation) and point it to a
> Linux router with conntrack loaded, and you'll see why I can't use the
> default kernel.
> Apparently there will be improvements in that regard in 2.6.23, and I've
> heard that 2.6.24 will actually be able to do 1:1 NAT without conntrack.
> Florin Andrei
As pointed out earlier, whether or not a vanilla kernel runs with no
issues would depend on what else is running on the system, and there
are people who have been compiling and using a newer kernel for one
reason or another. You can find one such example in this CentOS forum
post by Lenard who has been helping those who need to compile newer
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