Dennis J. wrote:
Hi,
I'm wondering what the most efficient way to implement a blocklist is.
We are basically talking about blocking a few thousand IPs. Does
iptables do some internal optimizations when blocking based on a source
address or would it be better to, say, create a chain for each class A
net (e.g. 83.0.0.0/8) and then add the IPs in that range to that class
to make the matching more efficient?
Have you considered ipset? I use it in various ways, sometimes to
allow, sometimes to deny. It supports IPs, NETs, ports, etc.
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