Date: Tue, 1 Dec 2015 16:40:09 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: hackers@freebsd.org Subject: Re: NFSv4 details and documentations Message-ID: <20151201134009.GG31314@zxy.spb.ru> In-Reply-To: <1739189176.113176689.1448975967722.JavaMail.zimbra@uoguelph.ca> References: <9BC3EFA2-945F-4C86-89F6-778873B58469@cs.huji.ac.il> <1489367909.88538127.1447688459383.JavaMail.zimbra@uoguelph.ca> <20151116155710.GB31314@zxy.spb.ru> <1312967974.89238067.1447714816355.JavaMail.zimbra@uoguelph.ca> <20151130165940.GB31314@zxy.spb.ru> <183609075.112643195.1448924896262.JavaMail.zimbra@uoguelph.ca> <1530363546.112649399.1448925348701.JavaMail.zimbra@uoguelph.ca> <20151201075117.GE31314@zxy.spb.ru> <1739189176.113176689.1448975967722.JavaMail.zimbra@uoguelph.ca>
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On Tue, Dec 01, 2015 at 08:19:27AM -0500, Rick Macklem wrote: > Slawa Olhovchenkov wrote: > > On Mon, Nov 30, 2015 at 06:15:48PM -0500, Rick Macklem wrote: > > > > > In GSS, the host based principal is <some-string>@<host>.<domain>. This > > > translates to: <some-string>/<host>.<domain>@<KERBEROS-REALM> in the KDC. > > > > > > > > > For example: > > > nfs-client.my.home - DNS name of the client machine > > > MYREALM - Realm for Kerberos KDC > > > - I want to have root work as "root". > > > --> I go to the KDC and create a principal name: > > > root/nfs-client.my.home@MYREALM > > > --> Then I create a keytab entry for this principal and transfer it to > > > /etc/krb5.keytab on the client machine (nfs-client.my.home). > > > --> Then I mount with: -o nfsv4,gssname=root > > > and non-root users will have to kinit to access the server as > > > themselves. > > > > Is there a difference between gssname=host > > (host/nfs-client.my.home@MYREALM and already exist) and gssname=root > > (and create and expoprt additional root/nfs-client.my.home@MYREALM)? > Oops, I was wrong. It shouldn't matter what the name before "@" is in the > client's keytab entry. > On old code I did for this (OpenBSD way back when), I had an option on the > gssd that would look up the name in the passwd database and create credentials > for that user. > > >From "man gssd" and a look at the code, that was never done for FreeBSD. > > Sorry for misleading you, rick > ps: If I had done it and you used the option, then "root@..." would have become > "root" on the server, etc. > You plan to use (in this case) in gssd principal root@`hostname`@MYREALM? Or `gssname_from_mount`@`hostname`@MYREALM for root access? Last case is prefered for me, I am create host/`hostname` in any case (for ssh access), and unnecessary to create additional root/`hostname`.
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