A few days ago, a client’s data center "vanished" overnight.
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A few days ago, a client’s data center "vanished" overnight. My monitoring showed that all devices were unreachable. Not even the ISP routers responded, so I assumed a sudden connectivity drop. The strange part? Not even via 4G.
I then suspected a power failure, but the UPS should have sent an alert.
The office was closed for the holidays, but I contacted the IT manager anyway. He was home sick with a serious family issue, but he got moving.
To make a long story short: the company deals in gold and precious metals. They have an underground bunker with two-meter thick walls. They were targeted by a professional gang. They used a tactic seen in similar hits: they identify the main power line, tamper with it at night, and send a massive voltage spike through it.
The goal is to fry all alarm and surveillance systems. Even if battery-backed, they rarely survive a surge like that. Thieves count on the fact that during holidays, owners are away and fried systems can't send alerts. Monitoring companies often have reduced staff and might not notice the "silence" immediately.
That is exactly what happened here. But there is a "but": they didn't account for my Uptime Kuma instance monitoring their MikroTik router, installed just weeks ago. Since it is an external check, it flagged the lack of response from all IPs without needing an internal alert to be triggered from the inside.
The team rushed to the site and found the mess. Luckily, they found an emergency electrical crew to bypass the damage and restore the cameras and alarms. They swapped the fried server UPS with a spare and everything came back up.
The police warned that the chances of the crew returning the next night to "finish" the job were high, though seeing the systems back online would likely make them move on. They also warned that thieves sometimes break in just to destroy servers to wipe any video evidence.
Nothing happened in the end. But in the meantime, I had to sync all their data off-site (thankfully they have dual 1Gbps FTTH), set up an emergency cluster, and ensure everything was redundant.
Never rely only on internal monitoring. Never.
@stefano That’s a rather cool war story. Great for a lecture.
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@stefano @mkj Aye, there are different kinds of SPDs, and unfortunately electrical installers usually go for the cheapest ones unless you specifically ask for certain specs when getting a quote. Like always, it comes down to money, but at the very least the customer should be told about the limitations
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@stefano That’s a rather cool war story. Great for a lecture.
@toxy this will probably be a longer blog post (with some more details)
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@toxy this will probably be a longer blog post (with some more details)
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I am quite keen to look into Uptime Kuma. Our current monitor is antiquated.
On a side note, you guys are hilarious! I genuinely had a good laugh at your comments.
@marios @EnigmaRotor @stefano can recommend Uptime Kuma.
Just consider carefully the number of historic records you need to keep - older versions had issues (db corruption) when history got large.
Current version I believe addressed this,and now supports mariaDB (external and embedded). -
@toxy this will probably be a longer blog post (with some more details)
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I am quite keen to look into Uptime Kuma. Our current monitor is antiquated.
On a side note, you guys are hilarious! I genuinely had a good laugh at your comments.
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You were reading my mind
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@toxy this will probably be a longer blog post (with some more details)
@stefano Featuring Hans Gruber?
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@stefano Featuring Hans Gruber?
@toxy featuring me
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A few days ago, a client’s data center "vanished" overnight. My monitoring showed that all devices were unreachable. Not even the ISP routers responded, so I assumed a sudden connectivity drop. The strange part? Not even via 4G.
I then suspected a power failure, but the UPS should have sent an alert.
The office was closed for the holidays, but I contacted the IT manager anyway. He was home sick with a serious family issue, but he got moving.
To make a long story short: the company deals in gold and precious metals. They have an underground bunker with two-meter thick walls. They were targeted by a professional gang. They used a tactic seen in similar hits: they identify the main power line, tamper with it at night, and send a massive voltage spike through it.
The goal is to fry all alarm and surveillance systems. Even if battery-backed, they rarely survive a surge like that. Thieves count on the fact that during holidays, owners are away and fried systems can't send alerts. Monitoring companies often have reduced staff and might not notice the "silence" immediately.
That is exactly what happened here. But there is a "but": they didn't account for my Uptime Kuma instance monitoring their MikroTik router, installed just weeks ago. Since it is an external check, it flagged the lack of response from all IPs without needing an internal alert to be triggered from the inside.
The team rushed to the site and found the mess. Luckily, they found an emergency electrical crew to bypass the damage and restore the cameras and alarms. They swapped the fried server UPS with a spare and everything came back up.
The police warned that the chances of the crew returning the next night to "finish" the job were high, though seeing the systems back online would likely make them move on. They also warned that thieves sometimes break in just to destroy servers to wipe any video evidence.
Nothing happened in the end. But in the meantime, I had to sync all their data off-site (thankfully they have dual 1Gbps FTTH), set up an emergency cluster, and ensure everything was redundant.
Never rely only on internal monitoring. Never.
@stefano feeling of :xkcd:`705` intensifies
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@stefano feeling of :xkcd:`705` intensifies
@valhalla totally!
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@valhalla totally!
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@jamesoff @rhoot @stefano When I managed such things in the past, I had the backup script use zabbix_sender to send a value to Zabbix and then alert if that is missing, like you just said.
But after one incident I also added monitoring of backup size and alerting if it changes by > 10% from the previous.
If backup starts getting failed DB dumps, it's good to know early that "hey, backups just dropped in size by 90%"
Also, if a backup suddenly grows a lot, something's weird.
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@jamesoff @rhoot @stefano When I managed such things in the past, I had the backup script use zabbix_sender to send a value to Zabbix and then alert if that is missing, like you just said.
But after one incident I also added monitoring of backup size and alerting if it changes by > 10% from the previous.
If backup starts getting failed DB dumps, it's good to know early that "hey, backups just dropped in size by 90%"
Also, if a backup suddenly grows a lot, something's weird.
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A few days ago, a client’s data center "vanished" overnight. My monitoring showed that all devices were unreachable. Not even the ISP routers responded, so I assumed a sudden connectivity drop. The strange part? Not even via 4G.
I then suspected a power failure, but the UPS should have sent an alert.
The office was closed for the holidays, but I contacted the IT manager anyway. He was home sick with a serious family issue, but he got moving.
To make a long story short: the company deals in gold and precious metals. They have an underground bunker with two-meter thick walls. They were targeted by a professional gang. They used a tactic seen in similar hits: they identify the main power line, tamper with it at night, and send a massive voltage spike through it.
The goal is to fry all alarm and surveillance systems. Even if battery-backed, they rarely survive a surge like that. Thieves count on the fact that during holidays, owners are away and fried systems can't send alerts. Monitoring companies often have reduced staff and might not notice the "silence" immediately.
That is exactly what happened here. But there is a "but": they didn't account for my Uptime Kuma instance monitoring their MikroTik router, installed just weeks ago. Since it is an external check, it flagged the lack of response from all IPs without needing an internal alert to be triggered from the inside.
The team rushed to the site and found the mess. Luckily, they found an emergency electrical crew to bypass the damage and restore the cameras and alarms. They swapped the fried server UPS with a spare and everything came back up.
The police warned that the chances of the crew returning the next night to "finish" the job were high, though seeing the systems back online would likely make them move on. They also warned that thieves sometimes break in just to destroy servers to wipe any video evidence.
Nothing happened in the end. But in the meantime, I had to sync all their data off-site (thankfully they have dual 1Gbps FTTH), set up an emergency cluster, and ensure everything was redundant.
Never rely only on internal monitoring. Never.
You are the hero I aspire to be!
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You are the hero I aspire to be!
@n_dimension ahah thank you, but I'm not a hero. I'm just doing my job anche checking the alerts.
