[rbldnsd] Newbie questions

[Phoenix Kiula]

Is there a way to use rbldns WITHOUT subscribing to an RBL?

I want to do this:

1. RBL check from public database
2. Each check is cached for a certain time, say a day (86400 seconds)
3. Every subsequent RBL check for IPs that are in my local cache get
checked locally, not needing to go outside

If this is possible, are there any easy instructions to set this up?

Thanks!