Wow thank you Alexander for this information ! Best regards. Gwenael Le Barzic <div class="gmail_quote">Le 11 août 2015 08:45, "Alexander Bokovoy" <<a href="mailto:abokovoy@redhat.com">abokovoy@redhat.com</a>> a écrit : <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Mon, 10 Aug 2015, bahan w wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hello. I don't know if you receive my previous mail, but thank you for your answer. I have two additionnal question then : - Concerning the master_kdc line, is it better to put here the physical machine or even to remove it if it is optional ? </blockquote> I don't think it ever matters as it only used for fallback reasons. <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> - Do you know how I can check which one of these three servers is currently used per server with this krb5.conf ? I need to check how I can resynchronize the last server. </blockquote> set KRB5_TRACE=/dev/stderr in the execution environment and all Kerberos code will start explaining what it does. For example, KRB5_TRACE=/dev/stderr kinit will show which server kinit will contact. <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Best regards. Bahan On Fri, Aug 7, 2015 at 11:05 PM, Alexander Bokovoy <<a href="mailto:abokovoy@redhat.com" target="_blank">abokovoy@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Fri, 07 Aug 2015, bahan w wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hello ! We are using freeipa version 3 and we are encountering a problem in our environment. We have one master kdc and two replicas. On the different linux servers on our environment, we have the following krb5.conf (I modified the hostname for NDA) : ### #File modified by ipa-client-install includedir /var/lib/sss/pubconf/krb5.include.d/ [libdefaults] default_realm = <MYREALM> dns_lookup_realm = false dns_lookup_kdc = false rdns = false ticket_lifetime = 24h forwardable = yes [realms] <MYREALM> = { kdc = host1.<mydomain>:88 kdc = host2.<mydomain>:88 kdc = host3.<mydomain>:88 master_kdc = host2.<mydomain>:88 admin_server = host2.<mydomain>:749 default_domain <mydomain> pkinit_anchors = FILE:/etc/ipa/ca.crt } [domain_realm] .<mydomain> = <MYREALM> <mydomain> = <MYREALM> .<myrealm> = <MYREALM> <myrealm> = <MYREALM> ### host1 is a physical machine host2 and host3 are VM. So I have some questions : Q1 - Does it make sense to put the line master_kdc and admin_server to the host2, which is a VM instead of the host1 which is a physical machine ? </blockquote> According to manual page of 'krb5.conf', ------- master_kdc: Identifies the master KDC(s). Currently, this tag is used in only one case: If an attempt to get credentials fails because of an invalid password, the client software will attempt to contact the master KDC, in case the user's password has just been changed, and the updated database has not been propagated to the slave servers yet. ------- 'admin_kdc' is what kadmin is using, so it is irrelevant for day to day actions in IPA. Q2 - When I try to connect to the UI of host1, I can enter my <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> login/password and it works. When I try to connect to the UI of host2, I have an error message saying my password is incorrect. When I try to connect to the UI of host3, it works. Does it mean host1 and host3 are synchronized but host2 is not ? </blockquote> Most likely, yes. Q3. Does the two last lines make sense ? I mean what is the exact usage of <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> the paragraph [domain_realm] ? Does it mean : if I try to connect to a server with the domain listed in this list, then I will try to contact the realm associated ? </blockquote> Since you disabled DNS discovery of realm based on the DNS domain, Kerberos library will perform some logic to find out which realm corresponds to the domain. domain_realm section helps here. krb5.conf manual page has clear explanation how the section is designed to work. -- / Alexander Bokovoy </blockquote></blockquote> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> -- Manage your subscription for the Freeipa-users mailing list: <a href="https://www.redhat.com/mailman/listinfo/freeipa-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/freeipa-users</a> Go to <a href="http://freeipa.org" rel="noreferrer" target="_blank">http://freeipa.org</a> for more info on the project </blockquote> -- / Alexander Bokovoy </blockquote></div>