Someday I started getting the following errors in the web interface of ELSA when trying to search something:
"Warnings: node 127.0.0.1 got error $VAR1 = undef; , node 127.0.0.1 got error $VAR1 = undef; , node 127.0.0.1 got error $VAR1 = undef;"
Steps which solved the issue for me:
Nice blog post with a great summary on the topic:
“[…] Operate under the assumption that your network is compromised. Quit spending so much money trying to defend everything; that is like trying to put a fence around a national park. Focus on trouble areas, or those of the greatest concern, or that mean the most impact if something goes wrong. Quit thinking of your network as a castle, when the attacker has mortars and missiles. If you are losing the war, and losing most battles, at least try to protect your most valuable assets as best you can. […]”
Great post about leadership and security:
The Needs of the Many – Becoming a Servant Security Leader