I can confirm that applying the patch provided in https://bugzilla.samba.org/show_bug.cgi?id=11164 does not fix the issue.
The "Did not manage to negotiate..." error message is gone but the other message "Failed to bind..." still spams the logs and replication is broken as per "samba-tool drs showrepl". I can also confirm that what triggers this are network connectivity interruptions between the DCs. After connectivity is restored, replication is not reestablished until Samba is restarted -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to samba in Ubuntu. https://bugs.launchpad.net/bugs/1357471 Title: Samba4 AD DC randomly dies, error: "Did not manage to negotiate mandetory feature SIGN for dcerpc auth_level 6". To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1357471/+subscriptions -- Ubuntu-server-bugs mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
