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Old 02-16-2003, 03:30 PM   #1
Registered: Nov 2002
Distribution: Debian testing.
Posts: 143

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iptables - module, or built into kernel?


Is it best to compile all the iptables/NAT/Netfilter stuff into the kernel, or build it as modules? I guess they'll be used a lot, so will be loaded...

Are there any performance boosts/preferences either way?

Old 02-16-2003, 04:15 PM   #2
Registered: Jan 2002
Location: Missoula. Montana, USA
Distribution: Slackware (various)
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My preference is to build any and everything as a module (including iptables) if it can be done so (option exists and not needed too early at boot, like my scsi driver). Then again, I am a bit wierd because I write all my kernels to floppy, and actually boot from a floppy. So for me, I suppose it certainly is a performance issue, even a usability issue as today's kernels can easily exceed a floppy with too many options compiled in.
Old 02-16-2003, 05:59 PM   #3
Registered: Nov 2001
Location: Exeter, UK
Distribution: Gentoo 1.4
Posts: 243

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module, unless it's needed at startup or within the first 10 seconds of loading init, module.
Old 02-16-2003, 06:04 PM   #4
Registered: Nov 2002
Distribution: Debian testing.
Posts: 143

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actually there is a way (using bootinitrd?) that you can make modules work for booting the machine, but anyways..

Another question, is the arp_tables code implimented yet? It doesn't seem to do a great deal, so I am going to remove it from my kernel for the time being?

Any hints/tips from mega gurus on how to reduce kernel size to the min? (Without nuking the box!)



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