tizs - 10:13 am on Oct 7, 2011 (gmt 0)
wheel: it's really not a good idea to replicate a DNS on a home connection. It's not much about bandwidth, as much as it is about latency: home links are usually terrible at that.
You have no way to make clients contact the primary only with DNS.
Just get one of the many secondary DNS services around. XName allows you to run both primary and secondary (full DNS hosting). BuddyNS [buddyns.com] does only secondary but guarantees very tight sinchronization time. Both are for free.