May 2005
Intermediate to advanced
666 pages
21h 5m
English
book
SSH, The Secure Shell: The Definitive Guide, 2nd Edition
by Daniel J. Barrett, Richard E. Silverman, Robert G. Byrnes
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Server Features: sshd
The OpenSSH server has new features pertaining to logging, listening addresses, and password and account expiration warnings.
Logging of Access Control Violations
When authentication attempts are rejected by user-level access
control (AllowUsers, DenyUsers) or group-level access control
(AllowGroups, DenyGroups), sshd will
log an informative message about it.
AddressFamily Keyword
The AddressFamily
configuration keyword, previously available to clients only, can now
be configured for the SSH server as well. If your server supports both
IPv4 and IPv6, this lets you control on which sort of addresses
sshd will listen.
Password and Account Expiration Warnings
If your password or account is going to expire (on operating systems that support expiration), sshd will now warn you in advance when you authenticate—for example.:
Your password will expire in 6 days
Your account will expire in 11 daysBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.