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INN FAQ Part 7

NOTE: The maintainers of the INN FAQ stopped publishing in December 1997.
An important update to this topic is provided by Mib Software in the Usenet RKT for Subscribers.

Subject: (7.2) Everything I receive, I re-feed to the feeder

"It seems that all the articles sent to me are resent back to my
provider. I only want to post those articles which have been locally
generated at my site back to my news feed provider."

or "I feed a site named foo.bar, but it puts something besides foo.bar
in their Path: header"

Let's look at a typical Path: line:

Path: plts!sdl!newsgw.mentorg.com!uunet!gatech!howland.reston.ans.net!agate!barrnet.net!jfrank.com!usenet

As a post goes from system to system, each site prepends their sitename
to the line. Usually a site uses their FQDN, but sometimes they register
something with the UUCP Mapping Project which makes sure no two sites use
the same name. In the above, we see a couple FQDN's and a couple sites
that are registered with the UUCP Mapping Project.

INN will not feed this article to any feed who's name appears in the Path:

Suppose you have a feed to/from barrnet.net that looks like this:


This means "send all newsgroups except control and junk, but not if the
Path: line includes 'netnews.barrnet.net'". That's fine, but as we see
in the above Path: example, BarrNet puts "barrnet.net" in the path,
even though their netnews machine is called "netnews.barrnet.net".

Therefore, we change the newsfeeds file to include a "/barrnet.net"
which means "exclude posts that have gone through barrnet.net".


Now you won't feed to netnews.barrnet.net articles that have already
gone through barrnet.

The best way to solve this problem is:
1. Read the Path: line from an article that has passed
through that site already.
2. Insert that sitename into the feeds description in newsfeeds.
3. "ctlinnd reload newsfeeds fixed_feed"


Suppose two sites have very reliable NNTP feeds from uunet and psinet
but still want a feed between each other to increase redundancy. They
might set up feeds like:


so that they aren't sending articles that have already reached two of
the biggest sites on Usenet (and therefore must have gotten good
distribution already), but will pass on everything else.


[Source: INN FAQ Part 7 Archive-name: usenet/software/inn-faq/part7]
[Last Changed: $Date: 1997/09/16 01:25:57 $ $Revision: 2.25 $]
[Copyright: 1997 Heiko Rupp, portions by Tom Limoncelli, Rich Salz, et al.]