How to ring correct extenstion based on To: header in SIP INVITE
I was setting up a new PBX for my client and I came to a rather unusual problem. The client was using …
WordPress quickie: Gallery is being displayed only to logged in users
Today, I’m going to tell you about one problem, which brought me sleepless night and could be solved with a few lines …
Protect your network against mailicious websites
Internet is a dangerous place. And more often also very controversial, just like the following article. Today I’m going to describe a …
Speeding up Nagios II.
In previous article of this miniseries we showed how to dramatically speed up Nagios by putting the spool directory into RAMdisk. Today …
Quickie: Schedule reboot of ES3528_52M
If I read manual, I would save a lot of time and trouble. EdgeCore ES3528_52M switches have ability to schedule reboot in …
Quickie: Delete unused files on ES3528_52M
In our network we have deployed dozens of EdgeCore ES3528M/ES3552M switches. However, after frequent upgrades and configuration changes, often happens that old …
Zabbix: Monitor PoE on RouterBOARD devices
Some RouterBOARD devices (those with “P” in the model name) have the ability to power devices through Power-over-Ethernet (PoE for short). It …
Linux quickie: Set system tunables according to device profile
Yesterday, I discovered one interesting thing. It’s kind a new for me, but nothing special. There is a useful tool for setting …
Mikrotik quickie: Add DHCP alert on DHCP relayed interface
DHCP alerting is a feature of RouterOS, which can alert us on rogue DHCP server on the network. The working principle is …
Speeding up Nagios I.
If we are taking the networking seriously, we have to monitor its status and health of its services. In small networks with …