Re: can libnetfilter_conntrack be used to write a userspace connection tracker?

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On Wed, Jan 12, 2011 at 1:36 PM, Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> You can implement a user-space conntrack helper with NFQUEUE and
> libnetfilter_conntrack:
>
> http://people.netfilter.org/pablo/userspace-conntrack-helpers/
>
> You require Linux kernel >= 2.6.37

I've upgraded the kernel to
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.37-rc2-maverick/.

I began experiencing this bug
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612272
For me, conntrack -E expect is exiting immediately, on an almost unloaded box.

So I built the two conntrack projects from git master to see if that
would help - and got a kernel bug (see other message).

Are there any other requirements? Would it be better if I build my own
kernel? Are there any other dependency issues between the various
players here: libnfnetlink, libnfconntrack, conntrack, and the kernel?

Or is there a limit to the users of conntrack? Can my own daemon
(modelled on the ftp userspace example of yours), conntrack -E, and
other users of conntrack coexist?

Thanks,
Sam
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