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Hi Mark,
let me summarize/clarify the problem before the chaos wins:
IMO the code in nntpd.c around line 1200 causes a problem:
if (!havepath) {
if (fputs("Path: ", out) == EOF)
err = 1;
if (fputs(fqdn, out) == EOF)
err = 1;
if (fprintf(out, "!%s\r\n", NEWS_USER) < 0)
err = 1;
}
and should be replaced by
if (!havepath) {
if (fprintf(out, "Path: %s!not-for-mail\r\n", fqdn) < 0)
err = 1;
}
or alternatively (if leafnode is considered as a client):
if (!havepath) {
if (fputs("Path: not-for-mail\r\n", out) == EOF)
err = 1;
}
Explantation:
1. the value of the "hostname" configuration variable must not contain
the fqdn of the upstream news-server. If it does, the article is
accepted by the upstream news-server and available on it -- but not
delivered further because of a duplicate entry in the Path header. =>
"hostname" should contain a resolvable fqdn of the client.
2. Message-IDs are in no case a problem. Leafnode uses the STAT comment
in order to check if an article with an identical Message-ID exists.
Example (real chat recorded with wireshark after executing "fetchnews -P"):
GROUP de.test
211 29017 19807 48857 de.test selected
STAT <[EMAIL PROTECTED]>
430 no such article found
POST
340 Ok, recommended ID <[EMAIL PROTECTED]>
[clients sends data]
The only constraint is that the string after @ is a resolvable domain name.
3. Articles with a Path header containing "news" as a suffix are
rejected by the news-servers upstream to my news-server
news.uni-siegen.de. I made four tests:
a.) hostname=news.uni-siegen.de: Path: not-for-mail
=> success
b.) hostname=pc228.simtec.mb.uni-siegen.de, Path: not-for-mail
=> success
c.) hostname=pc228.simtec.mb.uni-siegen.de,
Path: pc228.simtec.mb.uni-siegen.de!news
(equivalent to the unpatched nntpd.c)
=> no success
d.) hostname=news.uni-siegen.de, Path: news.uni-siegen.de!news
=> no success
Furthermore two tests using Path: [fqdn]!not-for-mail
e.) hostname=news.uni-siegen.de
Path: news.uni-siegen.de!not-for-mail
=> no success
f.) hostname=pc228.simtec.mb.uni-siegen.de
Path: pc228.simtec.mb.uni-siegen.de!not-for-mail
=> success
success := article successfully delivered and available in the usenet
I get several answers from these autoresponder-scripts listening
to de.test.
no success := article successfully delivered but only available on my
upstream news-server news.uni-siegen.de
Cheers,
- --
Michael
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