Nnrpd is a NNTP server which is more suitable for people reading/posting news than dealing with a news feed. Innd will spawn one of these off for each machine that connects that is not listed in hosts.nntp. If someone is having trouble posting/canceling news then it is likely that the problem is something to do with inews or nnrpd.

You can change how paranoid nnrpd is about weither you are allowd to run a command without a password by editing the table in nnrpd/nnrpd.c in the inn sources and recompiling.

Some of nnrpd's files

All of these are under /news
Provides a list of who can connect to nnrpd, what they can do and what username and password they must provide.