Hera planned upgrade

As part of our ongoing upgrades to our fleet we are upgrading your server (Hera) to SSD drives. This will mean faster loading sites, and better all round performance.

We are planning on doing this upgrade on February the 11th (next Wednesday) starting in the evening, and finishing late Wednesday or early Thursday. We plan for the server to be offline for up 12 hours in total, but from previous experience we can usually have all the transfers done in less than 6 hours.

18:00 – The planned Hera upgrade has begun.

19:00 – Accounts are being restored on the new SSD server.

20:36 – Hera is now back online – please raise a ticket if you’re having any problems.

Service Disruption – Network Attack

It appears another large attack is being aimed at our network.

19:12 – We were alerted to latency on our network.

19:18 – Networks are now investigating and applying mitigation techniques.

19:42 – Attack identified as SSDP UDP amplified network attack.

19:44 – Dropped identified destination of amplified traffic, network latency and speeds returning to normal.

We appreciate your patience and understanding during this period.

20.32 Olympus and all other servers should now be returning to normal speeds. We would like to take this opportunity to thank our clients for their support during this time. We appreciate the frustration these attacks cause & are incredibly grateful that our clients have been so understanding.

(RESOLVED) Service disruption – server attack

22.45: Our servers were being subjected to attacks starting around 22.45 this evening.

Our team are working on this now and we will keep the status updated.

23.15: Service seems to have returned to normal for the majority of users however a few Virgin Media users have reported issues connecting still.

[COMPLETED] Scheduled Network Maintenance – 19:00 – 01:00

Dear All,

As part of The Bunker’s continued upgrade to their core network, the final meshing of additional network routes and throughput will be applied this evening between 19:00hrs and 01:00hrs.

The majority of customers will see little or no noticeable change, however as with all technology there is a small chance this will result in some latency or packet loss while changes are being made.

We thank you for your patience and understanding during this maintenance period.

BT / Virgin Connectivity Issues

10.15am – We have been made aware by some clients using BT Broadband that they are unable to connect to some Krystal services. After investigating we have found BT are having what appears to be wide spread connectivity issues which aren’t related to our hosting.

BT have a service page here which details the issues they are having this morning.

11.15am – Both BT & Virgin clients have reported difficulties reaching our network this morning. We believe this is the result of an issue at BT which they aim to have resolved by 12:30.
For more information please see here.

Valhalla – High load issues / Apache issue.

15:00 – We have experienced high loads with the Apache/Nginx on Valhalla, at the moment it is not clear what is causing the issue however we will update this post as soon as we know more.
15:07 – Apache/Nginx restarted and appear to be happy, we will continue to monitor it.

We thank you for your patience and understanding.


(RESOLVED) Network connectivity problems

21:05 – We have stemmed the flow of the attack on our network, however, we will continue to monitor this over the coming hours.

20:51 – We are currently experiencing network connectivity problems, initial investigations shows that there is an attack being directed at our network.

We appreciate your patience whilst we work on resolving this issue.

(RESOLVED) Valhalla reboot

Planned Outage 21:00hrs

Due to essential maintenance, valhalla.krystal.co.uk we are planning to reboot the server this evening around 21:00hrs UTC. It is expected that the server will be down for around 5 minutes. We apologise for this outage, and expect the disruption will be minimal.

[Resolved] Zeus – Degraded Storage

[18th November 2014 – 19:15 ]  Zeus is currently running on degraded RAID – one of the hard drives has “Failed”. However this is the 3rd such failure in the last 12 months, and every drive we have taken out has been perfectly fine, so we’re just taking backups of the server/data incase there are any problems, and in the next few days we are going to take the machine offline for a few hours – do a full firmware update on the server, and hopefully bring it up with a new drive.

We are expecting this to happen on Wednesday or Thursday night, but we will update this status closer to the time.

[28th November 2014 – 15:25] Zeus is scheduled in for emergency maintenance tonight – we will attempt the firmware upgrades around 10pm onwards UK time – We expect there to be around 2 hours of downtime if everything goes to plan.

[28th November 2014 – 21:39] Preparing the server for upgrades now.

[28th November 2014 – 22:59] Zeus is back online – all Hardware firmware and Software has been upgraded to latest versions, and the storage array is in a valid state. We will continue monitoring the system over the coming days.


We have been seeing connection issues for email clients connecting over the secure SSL ports. Our edge firewall was recently updated with a patch to harden our network against ‘poodle’ exploits but has also intercepted some legitimate use by email clients, we have been working on the problem and things should be returning to normal.

We are sorry for any inconvenience this has caused.


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