What is the maximum number of iptables rules on 32Bit 2.6 kernel?
Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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actually I raised vmalloc to 512M from its default 128M. The problem is also that a standard 32Bit Linux Kernel can only use 1G of the machines RAM, even if you'd have 16G or so... There are some hacks with which you can use 2G or even 3G for the kernel. But it seems that you can only use them when disabling PAE..
However, when raising vmalloc even more, say to 640M, the kernel has too less memory and the system gets very unstable or doesn't even boot.
Well iptables (netfilter) runs in-kernel so you need to be able to fit everything into RAM. If you're hitting the limits of what you can fit into the RAM that's addressable with 32-bits, my best guess is that you need to move to a 64-bit installation to be able to make full and proper use of the RAM you have available.