I doubt that the 1161 log lines would cause the VM to crash. It would potentially cause the logging directory to fill up if you have a small /var partition where the logs are kept and at that point it could potentially freeze the VM, but not cause the host to crash. I think your issue revolves around the storms. I also do not consider a 1161 log lines a DoS. If it takes 1161 lines of failure entries to deny service to your server, then I would take a look at your setup.
On Fri, Jun 21, 2013 at 3:37 AM, Steffen Kaiser < skdovecot@smail.inf.fh-brs.de> wrote:
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On Fri, 21 Jun 2013, Hugh Davenport wrote:
and a minute later the server lost contact to the world. When I checked a
bit later, the underlying host machine (dovecot runs on a VM (KVM)) had been powered off.
I cannot believe that a DoS of a guest VM causes the host machine to power off.
- -- Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux)
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-- Daniel Reinhardt cryptodan@cryptodan.net http://www.cryptodan.net 301-875-7018(c) 410-455-0488(h)