Dhcp on Technical Notes

Home mDNS

Sun, 09 Mar 2025 00:00:00 +0000

Multicast DNS (mDNS) is a networking protocol designed to resolve hostnames to IP addresses within small networks, without the need for a local DNS server. It requires no configuration (zero-configuration) and uses the same programming interfaces, packet formats and operational semantics as unicast Domain Name System (DNS).

It was designed to work as either a standalone protocol or alongside standard DNS servers. mDNS can work together with DNS Service Discovery (DNS-SD), a complementary zero-configuration networking technique specified separately in RFC 6763.

Router with PiHole 6

Sat, 08 Mar 2025 00:00:00 +0000

A couple of months ago I moved the DHCP and DNS services to my home Linux router and left the Pi-Hole 5 service on a separate virtual machine. Despite everything working perfectly, I hit a snag: troubleshooting from PiHole is complicated because all DNS queries are resolved by the router and PiHole sees nothing. So I decided to redesign the setup.

In this post I describe how I install Pi-Hole 6 on my Linux router so it provides DNS, DHCP (with dnsmasq) and ad sinkholing. This involves undoing the native dnsmasq installation.

DHCP and DNS Server

Thu, 26 Dec 2024 00:00:00 +0000

In this post I describe how I’ve evolved my home DHCP and DNS server. Until now I had a PiHole dedicated on the network to DHCP, DNS and ad sinkhole. I’ve decided to migrate to a different configuration, move both DNS and DHCP services to the home router (Linux).

I realized that when PiHole went down, the rest of the home services would spiral out of control, despite having the router and internet working, so I’m leaving PiHole exclusively as the ad sinkhole.