RB750Gr3 and the Dude server

Mikrotik Routerboard RB750Gr3 or hEX is a small yet powerful device. It hides a few surprises in that small plastic case. One of them is a capability to run the Dude server.

Let’s make it! Continue reading

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RB750Gr3 and the Micro SD card

Many MikroTik Routerboards are equipped with a micro SD card reader. This card reader is a great solution to expand the Routerboard’s internal storage. It’s also very interesting that many Routerboards will write data significantly faster on this card than on their own internal storage.

RB750Gr3 (a.k.a. Hex) is a small and affordable 5-port router with the built-in USB support, a micro SD card reader and even a hardware IPsec encryption chip. And even better, it can be a Dude server, too. Continue reading

MikroTik and the Rogue DHCP Server

Every MikroTik device with the DHCP server service can be used to search your network for any rogue DHCP server. Even better, it can send you an email on such detection. When an alert occurred, you will be informed about the MAC address (and a few more details) of that machine.

You can’t use the MikroTik router to actively block such machine. This is the option that should be implemented on your network switches. Continue reading

RouterOS on a USB stick

MikroTik RouterOS is based on Linux. Following that fact and knowing that Linux has the live USB versions, I decided to try to install RouterOS on a USB flash drive. The purpose of such installation could be testing, the live demo system or to use this flash drive instead of hard disk in ye olde computer.

Here is the story how I made it. Let’s begin! Continue reading

Routerboard, a 3G modem and the USB power reset

Many newer MikroTik Routerboards are equipped with one USB port. That port is used to connect either an external storage or a communication device, like the 3G modem. Sometimes, this 3G device will simply stop to work.

The only way to return it into the working state is to unplug it and plug back again. This is easy if you’re somewhere near that device, but virtually impossible if you managing any remote device. In my case, that device was about 45 minutes driving away from me.

Continue reading

Compress a virtual hard disk to recover valuable space

My laptops are equipped with SSD drives and those drives are very small comparing with commonly used hard disks. Additionally, that means that I have less space for my virtual machines. However, using SSD to store virtual disks will result in the high performance virtualisation. Power never comes free. Continue reading