installing a package from Debian repositories on Ubuntu

[Tapas Mishra]

How do I install a package from a Debian repositories I am facing a
situation as given in this bug
https://bugs.launchpad.net/ubuntu/+source/dnsproxy/+bug/567008
where it is said
"Until this issue is fixed in Ubuntu using the dnsproxy_1.16-0.1
package from Debian unstable works fine on Lucid."
I am not able to understand how to do this?

--