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HDD Rescue Adventures

Friday, September 11, 2020

hdd-rescue-s.jpg As everybody knows “Make Backups (more than one!!) of your data!!” nowadays is as important as gaining enough sleep or eating healthy. But sometimes you are completely unprepared. This is exactly what happened to me a few days ago. A hard disk with very important source code for a project I’m currently working on suddenly stops working and the last backup was … some weeks ago.

So what to do? Besides calling me self a jackass I had to find a way to get back the data. After researching prices of some professional data rescue companies I came to the conclusion that trying to recover the data myself (and rewriting the lost source code in case my rescue attempt fails) would be cheaper and faster (project deadline is approaching with rapid steps).

 
 
 
 
 
 

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Extending Net-SNMP with Python3

Thursday, September 10, 2020

PyAgentX3 is a pure Python3 implementation of the AgentX protocol (RFC 2741).
It will allow to extend an SNMP agent (e.g Net-SNMP snmpd) by writing AgentX subagents without modifying the original SNMP agent.

RFC 2741: Agent Extensibility (AgentX) Protocol

Code and samples can be found on github.

It features:

  • Open a session with AgentX master, e.g. net-snmpd snmpd, and register a new session.
  • Send Ping request.
  • Register multiple MIB regions.
  • Multiple MIB update classes with custom frequency for each.
  • Support snmpset operations.
  • Reconnect/Retry to master, in case the master restarted.
  • Support for SNMPv2 traps.