August 2003
Intermediate to advanced
270 pages
10h 9m
English
Content preview from Kerberos: The Definitive GuideBecome 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,
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.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.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.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.
Server Hostname Misconfiguration
Undoubtedly, you’ll find yourself in the following situation. You’ve just installed Kerberos 5; your KDC works, as you can acquire tickets for your user principal. You’ve dutifully established a host principal for your test application server, and you’re ready to test the first application.
Your shell output looks something like this:
> hostname freebsd.wedgie.org > klist Ticket cache: FILE:/tmp/krb5cc_p82191 Default principal: jgarman@WEDGIE.ORG Valid starting Expires Service principal 01/29/03 04:52:21 01/29/03 10:30:11 krbtgt/WEDGIE.ORG@WEDGIE.ORG Kerberos 4 ticket cache: /tmp/tkt1000 klist: You have no tickets cached > ftp freebsd Connected to localhost. 220 freebsd.wedgie.org FTP server (Version 5.60) ready. 334 Using authentication type GSSAPI; ADAT must follow GSSAPI accepted as authentication type GSSAPI error major: Miscellaneous failure GSSAPI error minor: Server not found in Kerberos database GSSAPI error: initializing context GSSAPI authentication failed 334 Using authentication type KERBEROS_V4; ADAT must follow KERBEROS_V4 accepted as authentication type Kerberos V4 krb_mk_req failed: You have no tickets cached Name (localhost:jgarman): 331 Password required for jgarman. Password:
What just happened? It should work, after all. Let’s double-check the principals in our Kerberos database:
% kadmin Authenticating as principal jgarman/admin@WEDGIE.ORG with password. Enter password: kadmin: listprincs K/M@WEDGIE.ORG host/freebsd.wedgie.org@WEDGIE.ORG ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.