Today, my Putty SSH sessions (from a machine on my local network) drop randomly (and usually immediately after connection). I’m also seeing weird mailbox client behavior on Outlook… when I change to an IMAPS folder, the messages are jumbled based on date/time (yesterday’s mail showing at top of list, etc.) Nothing appears off in the logs. No fail2ban, auth, syslog, or ufw entries that correlate to the behavior.
You can usually debug ssh sessions by adding -vvv to the ssh command. Maybe something similar is possible for putty? Also, check the clocks of both the machine you’re logging in from and the mailinabox box.
Regarding the upgrades, I don´t have network manager on my Mailinabox, so can´t help you there. But obviously, if network manager has messed something up, you can expect network issues.
Thanks. Putty does have a verbose logging function. Unfortunately, while it does show all activity, it doesn’t show anything about the dropped session. All previous connections do reflect with “who” on the pseudo-terminal in the listing, as if it still thinks I’m connected. Given that this has been running like a top for nearly a year, I’m going to sweat this out for a day or three in the hope that it was an Ubuntu update that went awry (rather than possibly breaking something by futzing with it). I’ll update when something changes.
One other anomaly is that updates appear and disappear erratically in the MiaB status page, as shown in the attached picture. If I refresh, it might require me to logon again and show no pending updates. Very weird. Sounds like an Ubuntu issue.
Close this one out due to (quite embarrassing) human error. A couple weeks ago, I shutdown my MiaB guest VM and migrated that to another KVM host with greater resources. After patching and rebooting the old host a couple days ago, the guest VM started automatically, so both guests were running with the same internal and public IP addresses. Network clients (SSH, MUA, etc.) connections were flapping between the old and new hosts, which explains why mailbox contents shuffled around randomly, previously applied patches reflected in the /admin GUI, etc.
Sorry for the false alarm, but I appreciate your attention and dedication to supporting other users, @KiekerJan
