Centos dynamic dns not updating
Earlier this week I was asked for recommendations on how to register Linux systems in DNS.While the records could be manually entered (or scripted) as static DNS records, it would be ideal if the process were more "dynamic". it would be nice if they registered in DNS directly, using secure dynamic updates." Again… Let me explain…" for Linux is quickly becomes the foremost method for domain joining Linux systems to Microsoft Active Directory. It is a Fedora hosted project that has recently moved into the mainstream channels / repos. It is available for the majority of the mainstream Linux distros (Red Hat, Cent OS, Fedora, SUSE, Ubuntu, Debian, Gentoo, Free BSD, etc). I followed your instructions and domain joined the first Linux system.What is even more confusing is the effect you see if the zone is set to "Nonsecure and Secure". This unexpected response to SSSD will generate an error. Hopefully this explains a number of scenarios and how to set to proper configuration.If the zone is set to "None", no update of any kind is done. To understand what happens here, you must look at the design of the DNS update process. Enjoy your more modern Linux dynamic DNS experience!If you look in Microsoft DNS, you will see that the record is created.Upon close inspection of the security (Advanced view), you will see that the Linux host itself (as seen by its Kerberos principle name / computer object name), registered the record. NON-SECURE DYNAMIC UPDATE ZONES As discussed earlier, what happens if the DNS zones are configured for "None" or "Nonsecure and Secure"? In both scenarios, where we set the DNS zone to either None" or "Nonsecure and Secure", we will see a correctly formatted fully qualified name but then see a failure. DNS will delete the DNS record and discard the authentication token. This means until the NEXT cycle runs in 15 minutes, the client will be unresolvable (and cause great confusion every 15 minutes).Welcome to Linux Questions.org, a friendly and active Linux Community. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration.
But changing the IP back to dynamic will not cause the DNS to update.The DNS server will fail to register a single label record.