On 4/30/14 23:45, Freddie Cash wrote:
On Wed, Apr 30, 2014 at 8:31 AM, bycn82 <[email protected]
<mailto:[email protected]>>wrote:
On 4/30/14 23:01, Julian Elischer wrote:
On 4/30/14, 8:52 PM, bycn82 wrote:
Hi
`packet per second` it is easy to be implemented using
iptables, there is a module named `recent`, but in using
ipfw, Do we have any solution to fulfill it? check the
link below
https://forums.freebsd.org/viewtopic.php?f=44&t=42933&p=258441#p258441
<https://forums.freebsd.org/viewtopic.php?f=44&t=42933&p=258441#p258441>
since I don't use linux.. what is "packet per second"?.. does
it report it or set a limit on it?
bycn82
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Yes, "Packets Per Second"means limit a connection based on the
packets number, for example, If I allow 2 ICMP packets come to my
server in each individual second. only the first 2 packets will
be allow, all others in the same second will be dropped.
For ICMP, specifically, there's a sysctl to control the rate (per
second):
# sysctl -d net.inet.icmp.icmplim
net.inet.icmp.icmplim: Maximum number of ICMP responses per second
For everything else, you'd want to use dummynet(4).
--
Freddie Cash
[email protected] <mailto:[email protected]>
Hi
As Freddie said, for ICMP protocal, actually it comes with this 'PPS'
feature.
So I just double checked the source code of ip_icmp.c file because I
dont know this before.
And suddenly a question came into my mind. "Why I dont know it before"
Yes, I can list down all the sysctl option by `sysctl -a` command, But
we dont have any page which introduced all the options,
root@FB10Head:~ # sysctl -a | grep rexmit_min
net.inet.tcp.rexmit_min: 30
root@FB10Head:~ # sysctl -a | grep icmplim
net.inet.icmp.icmplim: 200
net.inet.icmp.icmplim_output: 1
root@FB10Head:~ # sysctl -a | wc -l
4120
root@FB10Head:~ #
So, more than 4000 options!!! Maybe we should have mail-list to collect
the introduction of all the options or a public WiKi page like wikipedia
for it.
Regards,
bycn82
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