Re: linux kernel TCP, network connections and iptables

From: Andi Kleen (
Date: Thu Sep 07 2000 - 17:21:40 EST

On Thu, Sep 07, 2000 at 10:51:50PM +0100, Alan Cox wrote:
> static unsigned long last_time;
> if(jiffies-last_time < HZ/10)
> return;
> last_time = jiffies;
> which will then limit to one RST per 10th sec

You do not even need patches for it. You can do it as well with a TBF
filter in the qdisc and a u32 filter that selects RSTs (it is even a
standard example in iproute2)

Another way that may work is to set the send buffer of tcp_socket in
tcp_ipv4.c to a really small value, so that only one RST packet fits.
Then you get a good load limit implicitely in the stack
(there should be probably a sysctl for that)

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