Re: Would a DOS on dovecot running under a VM cause host to crash?

2013-06-24 Thread Stefan Hajnoczi
On Fri, Jun 21, 2013 at 10:27:07AM +1200, Hugh Davenport wrote: The attack lasted around 4 minutes, in which there was 1161 lines in the log for a single attacker ip, and no other similar logs previously. Would this be enough to kill not only the VM running dovecot, but the underlying host

Re: Would a DOS on dovecot running under a VM cause host to crash?

2013-06-24 Thread Hugh Davenport
Checked the main logs. No go. Didn't check qemu logs. Will do that. I'm starting to think it was the power as when I turned of the UPS as a test. The server shutdown as well... Will get that fixed. Cheers, Hugh Stefan Hajnoczi stefa...@gmail.com wrote: On Fri, Jun 21, 2013 at 10:27:07AM

Re: Would a DOS on dovecot running under a VM cause host to crash?

2013-06-21 Thread Michael Tokarev
21.06.2013 02:27, Hugh Davenport wrote: Hey All, I'm just wondering whether this is what caused my server to crash. If some activity in a virtual machine causes the host to crash, it is a serious bug in qemu/kvm which should be identified fixed. Thanks, /mjt -- To unsubscribe from this

Would a DOS on dovecot running under a VM cause host to crash?

2013-06-20 Thread Hugh Davenport
Hey All, I'm just wondering whether this is what caused my server to crash. Started last night in NZ land. Jun 20 19:22:11 elm dovecot: imap-login: Disconnected (tried to use disallowed plaintext auth): user=, rip=attackerip, lip=10.0.0.3, session=0C8LzpDfZQDINsQC occasionally get Jun 20