Syntax to block an IP address under Linux using IP tables: iptables -A INPUT -s 123.45.67.89 -j DROP Replace 123.45.67.89 with the IP in which you would like blocked. For example, if you wish to block IP address 123.45.67.89 iptables -A INPUT -s 123.45.67.89 -j DROP If you just want Read more…
This one is pretty easy, but some of the quirks of the “Synology way” may lead you to a failed OpenVPN attempt. Mainly after exporting the configuration, it’s not clear that you should have to modify it in any way before trying to use it. If you want to Read more…
Reverse Proxy. I’ve been implementing reverse-proxy solutions in lab and in production for some time now, but I always come across the same problem; It’s not the easiest type of a system to manage, especially when there are SSL certificates involved. Now, before I started looking for an easy-to-manage SSL Read more…
I wanted to write a short introduction to a tool that I’ve been using a lot on my newest servers and development projects. This tool seriously provides the most amazing way of monitoring and comprehending your server’s performance and other metrics that I’ve seen in such a simple, lightweight installation. Read more…
This is part two, the final part of configuring NGINX with SSL as a reverse proxy. Now that you have successfully installed NGINX and obtained a free SSL cert, you can proceed. There is one important thing to note when configuring reverse proxy: For each “subfolder” you want to Read more…
If you have an office, facility, or residence with a lot of guest traffic and are needing to provide the guests with their own network using your existing Meraki equipment, this is the best way to do it. For this example the environment is using the following devices: Cisco Meraki Read more…
I manage a large number of ESXi hosts. These are at remote locations and it’s sometimes extremely difficult for me to gain access to the vSphere console unless we have a site-to-site VPN connection with the client. One of my recent challenges (hah) was remotely accessing and managing an ESXi Read more…
My primary concern lately as my internet presence has grown has been in the general realm of security. How do I know that no one is accessing my port-forwarded server? How do I know that no one is logging into my router? […] An easy answer to this has always Read more…
I’ve been deploying Sophos Virtual Appliances recently and so I was presented with a bit of a challenge when the install was failing on physical hardware. Error: install.tar wasn’t found on the installation media. Error: install.tar wasn’t found on the installation media. This happens because during part of the installation Read more…
Many times, early on in my tinkering or trying to learn about computer systems, I would wonder about certain terms or ideas that would come up on a “higher level”. The capabilities of my brain sometimes couldn’t wrap up the thoughts that make up an idea or a concept into a Read more…