finding the port for "kernel: Limiting open port RST response from x to y packets/sec"

Michael Sierchio kudzu at
Sat Aug 25 20:54:57 UTC 2018

On Sat, Aug 25, 2018 at 11:34 AM nusenu <nusenu-lists at> wrote:

> kernel: Limiting open port RST response from xxxx to yyy packets/sec

> Is there a way to find out which specific TCP port is getting hammered
> or any other additional debug information related to these log entries?
> (the server has multiple open and publicly reachable open TCP ports)

You can identify and log these packets in IPFIREWALL (man ipfw).

You can also set  sysctl net.inet.tcp.log_debug=1
"Well," Brahma said, "even after ten thousand explanations, a fool is no
wiser, but an intelligent person requires only two thousand five hundred."

- The Mahābhārata

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