Jul 12 22:44:01 pve postfix/smtp: connect to .:25: Network is unreachable Jul 12 22:44:01 pve postfix/smtp: connect to .:25: Connection timed out Jul 12 22:43:31 pve postfix/smtp: connect to .:25: Network is unreachable Jul 12 22:43:31 pve postfix/smtp: connect to aspmx.l.:25: Connection timed out Jul 12 22:43:01 pve postfix/smtp: connect to aspmx.l.:25: Network is unreachable Jul 12 22:17:12 pve smartd: Device: /dev/sdb, SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 64 to 63 Jul 12 22:17:12 pve smartd: Device: /dev/sda, SMART Usage Attribute: 194 Temperature_Celsius changed from 51 to 52 var/log/syslog doesn't show anything particularly obvious leading up to the freeze/lockup. What steps should I take next to try to figure out what is causing this crash? The PVE host is totally unresponsive to keyboard input, won't answer ping, ctrl-alt-del doesn't reboot it, all I can do is hold the power button until it shuts off. I notice it because the internet goes down. I've now had this whole setup live for about a month, and I've had two separate hard-crashes. The only 'non-standard' thing going on is that I have Nut installed on the PVE host (using the official debian package), an APC UPS is attached via USB, and I have the guest VM talking to Nut on the host, as well as a Synology NAS (both in client mode). Link/ether 32:e8:b1:59:dc:21 brd ff:ff:ff:ff:ff:ffĩ: tap100i0: mtu 1500 qdisc mq master vmbr0 state UNKNOWN mode DEFAULT group default qlen 1000 Link/ether 00:e0:67:25:16:c5 brd ff:ff:ff:ff:ff:ffĨ: vmbr0: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 Link/ether 00:e0:67:25:16:c4 brd ff:ff:ff:ff:ff:ffħ: enp6s0: mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 Link/ether 00:e0:67:25:16:c3 brd ff:ff:ff:ff:ff:ffĦ: enp5s0: mtu 1500 qdisc mq master vmbr0 state UP mode DEFAULT group default qlen 1000 1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

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