I have recently have had three probes «die» on me in ways the hardware actually seems fine, but the problem is with connectivity with the Atlas infrastructure. I am therefore starting to wonder if my probes were all OK after all, and that the problems are with the Atlas registration servers or infrastructure in general. Here's the timeline: First problem was with V1 probe #138 back in January. It reported through SOS messages that it could not connect on HTTPS, error code «firewall issues suspected» or something like that. However, observing the network traffic in/out of the probe revealed that the probe did successfully establish a TCP three-way handshake with reg01/reg02.atlas.ripe.net, only to immediately close the connection with a FIN packet, without actually sending any payload. There was no firewall blocking any traffic. RIPE NCC support essentially shrugged and said V1 probes aren't really supported nowadays, so I gave up and recycled the probe. Second problem was with another V1 probe (#433), in May. That one was left disconnected for an extended period of time, transitioning to "abandoned" status. As it did not reconnect after I fixed the network, I proceeded to write it off and re-connect it, then re-registered it with my personal account. It too connected fine with the network, and the event log showed a «Registration» event every time I power-cycled the probe, but it never went further and the status was stuck at «No Controller Connection». The written off status never cleared. RIPE NCC support could confirm that the written off status should have cleared after reconnection, but otherwise weren't able to help, so this probe went in the bin as well. Third problem is with a V3 probe (#10667), ongoing as I write this. It was working perfectly fine up until last week, when I moved it from a data centre to my home network. The probe had static IP configuration in the data centre, and with no way of configuring it to back to using DHCP, I thought I'd just re-install firmware by booting it up without the USB in and plugging it back in after a while. It connected fine and reported «NO-USB» SOS messages, and after plugging in the USB stick «Registration» events with the hardware details of the USB stick appeared (curiously enough, most of these events report an IP of 172.17.0.1). At that point the process gets stuck, the «Registration» events with the USB stick details keep repeating approx. every 65 minutes, and there's a warning banner at the top of the page «Flash Drive Filesystem Corrupted». So I have re-tried this with several different USB sticks, all from reputable brands, and all passing whole-device read/write tests to identify bad blocks when connected to my laptop. I have also tried replacing the power supply – nothing helps, it always ends up in the same «Registration» loop. During the process, a partition table with three 1 GiB large partitions is created on the USB stick, containing data/filesystems that my Linux laptop does not recognise as anything familiar. I could be persuaded that the two V1 probes did indeed have hardware problems. However the V3 probe clearly does not, at least not with its USB stick, and since its failure mode is rather similar to how #433 failed (process getting stuck after «Registration» events), I am starting to wonder if at least #433 was fine all along. Anyway, i am curious to hear if it is just me being very unlucky with my probes this year or if anyone else have had similar problems recently? Another issue, probably unrelated but I thought I'd mention it anyway, is that when I try to change the ownership of the V3 probe to my personal account, the web page just displays a red pop-up with the unhelpful message «An error occurred», and the ownership change does not happen. Tore