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Category - Network

  • Debian
  • Linux
  • Network
  • Ubiquiti
  • Ubuntu

UBNT UniFi Controller update: Repository changed its Codename value from X to Y

2021-12-05
by Gábor Hargitai
1 min read

You need to manually accept the changes through APT – to do this, issue the following: apt-get update --allow-releaseinfo-change

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  • Network
  • OS X
  • Ubiquiti

Unifi Controller: Could not find Java SE runtime environment under macOS

2020-06-15
by Gábor Hargitai
1 min read

Starting the Unifi Controller under recent macOS versions with OpenJDK installed can cause problems, such as one of the following warnings: Could not find a JRE. Will look for a JDK.ERROR: could not find Java SE...

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  • Network
  • OS X

Disable FortiClient VPN autostart on login under macOS

2020-03-14
by Gábor Hargitai
1 min read

Disabling the FortiClient VPN from starting automatically during user login is not currently possible from System Preferences > Users & Groups > Login Items like in most cases. Instead, FortiClient uses LaunchAgents...

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  • Debian
  • Linux
  • Network
  • Other
  • Ubuntu
  • Windows

Measure network speed, throughput performance and bandwidth between devices

2016-03-17
by Gábor Hargitai
1 min read

It is always good to know just how much TCP / UDP packets can we squeeze out from our network interfaces. Be it that we are building our very own router or just plain testing out our network environment. Usually there comes a...

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  • MikroTik
  • Network

MikroTik RouterOS Hairpin NAT – Public WAN Port Forward From LAN

2016-03-10
by Gábor Hargitai
2 min read

Switching from a cheaper brand router to something classier can cause a lot of surprises: from broader set of functions to unforeseen security options. One of which is the fact that trying to connect to one of the ports of the...

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  • Debian
  • Linux
  • Network
  • PostgreSQL
  • Ubuntu

Find and Block Abusive IP Addresses on Ubuntu Server

2015-05-31
by Gábor Hargitai
2 min read

The Issue Your server has an extremely high workload in comparison to the usual CPU load, it generally feels less- or even unresponsive and if you have any intrusion detection configured, then it is sending alerts of failed login...

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  • Network
  • OpenWRT
  • Other

OpenWRT Wi-Fi Repeater / Wireless Bridge

2015-04-25
by Gábor Hargitai
2 min read

Let us have a nice Wi-Fi range extander be born from the ashes of a long discarded router now, shall we? I’m going to assume that you’ve successfully: installed OpenWRT on your router of choice had accessed the admin...

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  • Network
  • Samba
  • Windows

How to close open SAMBA / Windows Shared Folder connections effectively

2012-08-17
by Gábor Hargitai
2 min read
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Since the concept of mounting a file system had risen, nearly every type of media and storage device can be accessed from practically everywhere in the world. Unix / Linux based systems are exceptionally good at handling multiple...

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  • Debian
  • Linux
  • Network
  • Other
  • Ubuntu

VNC with SSH-tunneling over PuTTY

2012-07-21
by Gábor Hargitai
2 min read

Having SSH is totally great to administer your servers and such, but if you ever face a situation that absolutely requires a few clicks to be made on the GUI, then at best you are screwed. For the technically savvy this might not...

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