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+title = '2023-01-12 Loss of Network Access'
+date  = 2023-01-12
+
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+
+# 2023-01-12 Loss of Network Access Postmortem
+
+Key people: Brendan (silver).
+
+## What happened
+On 2023-01-12 we received an email from ITD stating that 193.1.99.123 was registered as an attack source by Heanet and external access was removed by ITD to contain it.  
+Later the same day it had been upgraded to our entire subnet, the ITD security team saw our servers as a security risk.
+
+## What was the root cause
+Unlike other incidents we knew from the outset what the root cause was.  
+One of the Wordpress instances on www.skynet.ie decided its true calling was to become a spambot, this is what caught the attention of Heanet.
+
+## Restoring network access
+In order to restore network access ITD had two requirements:
+
+1. Servers are patched on both an OS & application level.
+2. Maintained in such a manner to prevent unauthorized access or misuse
+
+
+## Rebuilding services
+Due to the age of the software on virtually all machines in place upgrades were neither feasible nor maintainable.  
+
+As a result user data and config files were backed up from the servers that would be reused in the future.  
+Other servers were archived in case of a need to get more data in the future.
+
+Using the newest server with adequate hard drive bays Proxmox was installed.  
+Various containers were then created to serve the roles needed to run the cluster.  
+The OS chosen for these containers was NixOS, a config based operating system, which allows us to easily update with consistency.  
+
+This process took until the end of April.  
+We were then able to request that ITD open specific ports for servers.  
+Over the summer more services became active.
+
+
+## Outcomes
+As a result of all this: 
+
+* We have a far better relationship with ITD
+* We have reliable systems
+* We have improved security and access controls.
+* We have embraced automation
+* We are far more open and transparent (config is open source)
+