On Mon, Mar 16, 2009 at 10:14:54AM +0100, Jordi Espasa Clofent wrote:
> Hi folks,
>
> Looking at /var/log/messages in my time server (OpenBSD 4.2, amd) I see
> a lot of:
>
> Mar 14 03:25:06 ntp01 ntpd[22179]: malformed packet received from
> 80.24.191.155
>
> Looking at relationed code (ntp_msg.c and ntp.h) I understand that it's
> only a warning and the real culprit it's a buggy client. But...
>
> ?OpenNTPD serves the time is this case (when the client sends a
> malformed packet)?
> If yes ?affects in the general performance of the service?
It will serve time if it receives enough valid packets, possibly from
other sources. If you use the default setup, it uses multiple peers
so you should be ok.
>
> Aside of this, I'm using PF and the scrubbing options on same machine.
>
> ?Can I avoid these "malformed" packets with PF-scrub intervention?
No.
Btw, more recent versions of ntpd just do not log these messages
anymore.
-Otto
