My two Samba AD DCs run in an environment with frequent network
interruptions due to power cuts. It seems that even very brief network
interruptions trigger this issue, which then doesn't resolve itself when
connectivity is restored.
After most network interruptions, the following three messages repeat in
log.samba every 5 seconds, and 'sudo samba-tool drs showrepl' shows failures. A
'sudo service samba-ad-dc restart' is required to get everything working again.
- "Update failed: Miscellaneous failure (see text): Matching credential
(GC/{other-dc}.{domain}/{domain}@{DOMAIN}) not found"
- "Did not manage to negotiate mandetory feature SIGN for dcerpc auth_level 6"
- "Failed to bind to uuid {uuid-1} for
{uuid-1}@ncacn_ip_tcp:{uuid-2}._msdcs.{domain}[1024,seal,krb5]
NT_STATUS_ACCESS_DENIED.
In a country with on average 12 powercuts *per day*, which despite a
huge arsenal of stabilisers and UPS-es do cause brief network
interruptions, you can imagine that this issue is a major pain in the
behind :-/
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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".
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