June 2000
Intermediate to advanced
512 pages
15h 18m
English
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Restricting NNTP Access
Access to NNTP resources is governed by the file
nntp_access in /etc/news. Lines
in this file describe the access rights granted to foreign hosts. Each line
has the following format:
siteread|xfer|both|no post|no [!exceptgroups]
If a client connects to the NNTP port, nntpd attempts to
obtain the host’s fully qualified domain name from its IP address using reverse
lookup. The client’s hostname and IP address are checked against the
site field of each entry in the order in which they
appear in the file. Matches may be either partial or exact. If an entry
matches exactly, it applies; if the match is partial, it applies only if there
is no other match following it that is at least as good.
site may be specified in one of the following ways:
- Hostname
This is a fully qualified domain name of a host. If this matches the client’s canonical hostname literally, the entry applies, and all following entries are ignored.
- IP address
This is an IP address in dotted quad notation. If the client’s IP address matches this, the entry applies, and all following entries are ignored.
- Domain name
This is a domain name, specified as *.
domain. If the client’s hostname matches the domain name, the entry matches.- Network name
This is the name of a network as specified in
/etc/networks. If the network number of the client’s IP address matches the network number associated with the network name, the entry matches.- Default
The string
defaultmatches any client.
Entries with a more general ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.