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Domain Name Relay Daemon

Features

  • Caching of DNS requests.
  • Support for backup DNS servers.
  • Uses random source port and random query ID's to prevent cache poisoning.
  • Support for simple routing - specify different forward DNS servers for different domains.
  • Force authorative or unauthorative answers for specified domains.
  • Share the /etc/hosts over the network.
  • Support for openbsd, freebsd and linux.
  • TCP support
  • DNS blacklist support

About DNRD

The Domain Name Relay Daemon (DNRD) is a simple "proxy" nameserver. It is meant to be used for home networks that can connect to the internet using one of several ISP's.

DNRD is pretty simple. It takes DNS queries from hosts, and forwards them to the "real" DNS server. It takes DNS replies from the DNS server, and forwards them to the client. What makes DNRD special is that it can be configured to forward to different DNS servers depending on what ISP you are dialing.

Before DNRD, there was no easy way to change the default nameserver on a Linux system. You can play games with /etc/resolv.conf, such as copying other versions of this file in place depending on which ISP you're dialing into, but that is a pain. Instead, you can run DNRD on your dial-up machine. Whenever you dial into an ISP, run dnrd with the appropriate DNS server as an argument. Here's an example of how you would run it:

dnrd  -s 1.2.3.4

DNRD was originally designed to work in conjuction with mserver. It works very well with mserver, but works just fine with other dialup systems as well as in other non-dialup environments.

Please read the INSTALL file for information on how to build & run dnrd.

Download

Latest release of dnrd is 2.20.4.

Use Github's release system to get other versions. The last few version's tarbals have been migrated from the original SourceForge project.

Alternatives

  • If you don't want any caching: dnsproxy
  • If you dont need domain "routing": dproxy
  • If you want integrated DHCP support: dnsmasq
  • If you need to store the DNS cache to disk: pdnsd

Otherwise, use DNRD :)

Author

The original version of dnrd was written by Brad Garcia [email protected]. Other contributors are listed in the HISTORY file included with the source code. This project is in need of a maintainer. It's current maintainer (benjaminpetrin) isn't active in this project.