.de - Frequent DNS update errors

Frequent error codes returned by NAST nameserver checker:

Error 903 - Port 53 is not opened
Solution: using a port scanner check that your nameserver is reachable

Error 901 - Nameserver refuses to answer
Solution: check that the zone actually exists on the nameserver that was assigned to a domain 

Error 902 - Domain update failed. Timeout (target)
Solution: check that the nameservers are 
online and respond to requests

Error 110 - SOA ‘retry’ value is less than the recommended one
Solution: increase the retry value of the SOA record (4)


Error 118 - nameserver entries (NS records) in the DNS entry for the corresponding domain do not match the nameservers specified for the domain
Solution: either the zone file or the entries need to be adjusted

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