Rancid 2.3.8 is licensed as BSD with advertising.  However, I was looking at the 3.0 alphas and noticed that the license added the following clause:

+## 6. Parties packaging or redistributing RANCID MAY NOT distribute altered
+##    versions of the etc/rancid.types.base file nor alter how this file is
+##    handled.  The purpose of this condition is to help keep our support
+##    costs down.

It seems to me that this is a potentially non-free addition.  The original sources can be found here:


Jeff Ollie