Overriding one name in a public domain without breaking the domain
A single internal zone for the domain makes the resolver authoritative for all of it, so mail and the public site start returning NXDOMAIN to everyone in the house.
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Networking
A name should say what something is, not where it runs
I counted seven naming shapes on my own network for the same kind of thing, and one of the suffixes meant two different backends depending on which name you picked.
My Pi-hole had not been blocking ads for most of the network
An adlist with no group assignment applies to no client. Mine had 93,516 domains in it and had been doing nothing for as long as it had been there.
dnsmasq answers on the interface, not on the address
The gateway pings from inside the container and its DNS never answers. I got the diagnosis wrong twice, and the second time it was my own test that was lying.
Site to site with OpenVPN with TLS and FirewallD on Debian
So I needed to setup a site to site transport between our two datacenters, so our internal network will be able to communicate between the two datacenters easily.
Verifying SSH Key Fingerprints with DNS records
SSH Fingerprinting is a method to provide DNS records for key fingerprint verification of any client that logs into said machine.
Automatically switch between WiFi and Ethernet
I wanted a way to automatically switch between wifi and ethernet when I connect the system to the ethernet port, or auto start wifi when I disconnect the ethernet port.
Upgrade Plesk 11.5 to Plesk 12 on Debian Wheezy 7.6, fixing OpenDKIM and DK
I wanted to upgrade to the newer edition of Plesk as it has some interesting features for controlling outgoing mail that make my life easier. So I wanted to upgrade and ran into some weird issues...
KVM port forwarding with NAT network and libvirt on Debian
I needed to forward some ports from multiple KVM machines, I tried with iptables, but the problem is libvirt adds some rules of it's own, and the rules were never in the correct place so it didn't...
Automatic zone replication with BIND9 in Plesk 11.5 + Debian Wheezy + PHP
This tutorial is aimed at showing how to set up zone replication from a master to a slave server, without the help of the user input on Debian Wheezy with Plesk 11.5 and PHP
Generating DomainKeys for Mail
We need to generate DK (DomainKeys) to validate that we are the original senders and not someone impersonating us, this tutorial is meant to explain how generate the keys
Setting up SPF + DK + DKIM with Postfix in Plesk 11.5 on Debian Wheezy
Shows up a detailed process on how to set up SPF + DK + DKIM with Postfix in Plesk 11.5 on Debian Wheezy, step by step, and how to test to make sure everything is working correctly
Websocket traffic forwarding using iptables
I've had a problem, I needed to route websocket trafic from internal server for external access, but I ran into a lot of problems, like not connecting, or the connections dropped, so let's see how...
Domain and Web hosting on different servers
If you want a website you need two things, the domain name and the web hosting. I ran into a small problem a while ago, the usual method of integrating them together is simple, just point the...