Sadly there is no deb packages provided in Squeeze, so we have to build them ourselves. Luckily on the other hand, in SID there are are deb packages available + sources so we will start from there:
First step is adding the SID source to /etc/apt/sources.list
deb-src http://cdn.debian.net/debian/ sid main non-free contrib
After that update your sources and the the packages:
aptitude update aptitude install build-essential cd /usr/src apt-get source djbdns
After that there should be a folder called djbdns..... in /usr/src, change into that directory and run the following command:
dpkg-buildpackage -uc -rfakeroot
This will build the package, once that is done, go one diectory up and do a ls -l and you will find the generated .deb package. Install that and you are one.