Re: [PATCH 1/2] netfilter/xt_hashlimit: new feature/algorithm for xt_hashlimit

On Mon, Sep 04, 2017 at 12:14:33PM +0200, Pablo Neira Ayuso wrote:

On Fri, Aug 18, 2017 at 04:58:59PM -0400, Vishwanath Pai wrote:
[...]

quoted

The main difference between the existing algorithm and the new one is
that the existing algorithm rate-limits the flow whereas the new
algorithm does not. Instead it *classifies* the flow based on whether
it is above or below a certain rate. I will demonstrate this with an
example below. Let us assume this rule:

iptables -A INPUT -m hashlimit --hashlimit-above 10/s -j new_chain

If the packet rate is 15/s, the existing algorithm would ACCEPT 10
packets every second and send 5 packets to "new_chain".

But with the new algorithm, as long as the rate of 15/s is sustained,
all packets will continue to match and every packet is sent to new_chain.

Sounds good, applied, thanks.

BTW, for the record, I have rename this patch title to:

netfilter: xt_hashlimit: add rate match mode