红帽全球峰会1.7. How the AD provider handles dynamic DNS updates
Active Directory (AD) actively maintains its DNS records by timing out (aging) and removing (scavenging) inactive records.
By default, the SSSD service refreshes a RHEL client’s DNS record at the following intervals:
- Every time the identity provider comes online.
- Every time the RHEL system reboots.
At the interval specified by the
dyndns_refresh_intervaloption in the/etc/sssd/sssd.confconfiguration file. The default value is86400seconds (24 hours).注意If you set the
dyndns_refresh_intervaloption to the same interval as the DHCP lease, you can update the DNS record after the IP lease is renewed.
SSSD sends dynamic DNS updates to the AD server using Kerberos/GSSAPI for DNS (GSS-TSIG). This means that you only need to enable secure connections to AD.
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