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Cron Blog – My personal findings

Month: March 2017

Firewalling by country on Edgerouter

March 20, 2017March 20, 2017 Alex Jensen 8 Comments

Why? I have a small webserver running inside my network on port 55555. I only want my friends to be able to access it. I know that they live in Denmark, Norway and Sweden. I want to make sure that China, Russia and other parts of the world has no access, in order to minimize […]

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IPtables stats from Edgerouter via SNMP-part2

March 19, 2017March 19, 2017 Alex Jensen Leave a comment

OpenNMS In part 1 we made the Edgerouter ready to publish some iptable counters via SNMP. In this part we are going to visualize it in the OpenNMS GUI 🙂 Setting up data collection OpenNMS detects the edgerouter as a mib2 device. Therefore we need to add the definition of our iptables to “/opt/opennms/etc/datacollection/mib2.xml”. First […]

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IPtables stats from Edgerouter via SNMP-part1

March 19, 2017March 20, 2017 Alex Jensen 4 Comments

A little about Edgerouters IPtables. I wanted to follow the traffic through my firewall rules on my Edgerouter. Everything is based on IPtables and from the CLI I can get the statistic of how much traffic hits each rule. The following command shows all the firewall rules that are generated from the Edgerouters configuration: root@edge:/# […]

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Playing with EXIF in Powershell

March 7, 2017March 7, 2017 Alex Jensen 3 Comments

A friend of mine had a lot of pictures he wanted to do some statistics on. I therefore made a few powershell pieces to get him started. Everything is build on top of the output of the great free tool EXIFTool Here are some example commands: # Call exiftool to collect all exifdata from a directory, […]

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Dockerizing Owncloud

March 6, 2017March 15, 2017 Alex Jensen Leave a comment

For a long time I wanted a good solution for sharing files with friends and family. I found Owncloud to suite my needs. Luckily there was already a docker image for this that would make my life easier. I just wanted to do some customization like: I wanted to add letsencrypt to the web-server, so […]

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Edgerouter scheduled backups

March 4, 2017March 6, 2017 Alex Jensen 3 Comments

In this section I will describe how to setup a scheduled daily backup of the edgerouter-configuration via SFTP to another linux-box.   On the Edgerouter First we need to generate a public keypair on our Edgerouter. This is our ticket to the backup server. This is way more secure that using a password for authentication. […]

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Recent Posts

  • From Owntrack to QGIS – part 2
  • From Owntrack to QGIS – part 1
  • Ture og steder fra udinaturen.dk i QGIS
  • Grabbing Media with MITMPROXY
  • Evil Maid – Encrypt your harddrive
  • Under the radar remote shell
  • Poor mans Bash Bunny
  • ESP8266 on batteries for years – part 5
  • ESP8266 on batteries for years – part 4
  • ESP8266 on batteries for years – part 3

Recent Comments

  • Juki on Grabbing Media with MITMPROXY
  • David on ESP8266 on batteries for years – part 1
  • Brandon Garner on Poor mans Bash Bunny
  • Ric Mart on Playing with EXIF in Powershell
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