Technical Blog


Swiss Cyber Storm 2015

The 2015 Swiss Cyber Storm conference is going to be held in the KKL Lucerne on 21. Oct. 2015. Information about the conference is available from the Swiss Cyber Storm website. netnea / Christian Folini is a member of the organisation committee.   Christian Folini Follow @ChrFolini Tweet


OIN turns 10

The Open Invention Network (OIN) aims to protect Open Source Software, and Linux in particular, against patent lawsuits. It maintains a pool of patents centered around Linux, and builds a continuously growing patent non-aggression community. In October 2015, OIN looks back to ten successful years: OIN press coverage netnea is a member of OIN since […]


Storage systems for large NMS

In a project or upgrading Zenoss for a large customer, I have had numerous issues regarding i/o performance. This was certainly expected, but not to that level. Some numbers to explain the situation: the NMS monitors about 1’900 devices Includes about 700+ routers and 1000+ switches Some switches are stacked On routers, we collect 8 […]


Netdisco with SNMP V3 and Cisco

If you change Cisco switches from SNMP V1/2 to V3, it may go unnoticed that part of the SNMP polling in Netdisco stops working. Specifically, the collection of per-VLAN MAC address tables will fail, with authorization errors in the macsuck log. Additional snmp-server config commands on the switch are required to enable access to the […]


Talking Risk in Information Technology

Domenico Salvati and Adrian Leuenberger of DefCon Switzerland ran a workshop on corporate risk management in Zurich. This one-day event addressed two goals: To present a model of risk “compatible” with upper management in order to allow techies to talk with high-ranked business representatives. To talk about a second model which measures and calculates probabilities […]