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TechnitiumSoftware / DnsServer

Technitium DNS Server
https://technitium.com/dns/
GNU General Public License v3.0
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Feature Request: Option to Silence Errors Logs for Stub Zone Refresh #654

Open gareththered opened 1 year ago

gareththered commented 1 year ago

I'm currently running Technitium DNS in my lab environment.

Due to resource limitations, I don't run all of my lab servers at a time, and start/stop AD domains as required. For example, I have w2k12.test and w2k19.test domains and might run down w2k12.test if the other is running high loads. Each domain was added to Technitium as a stub zone when I initially built it, pointing to the domain's Domain Controller.

This works reliably, but I've noticed that Technitium (naturally) logs errors when the domain is powered down:

[2023-06-07 00:05:09 UTC] DNS Server failed to refresh 'w2k12.test' stub zone from: 172.28.133.10
TechnitiumLibrary.Net.Dns.DnsClientNoResponseException: DnsClient failed to resolve the request 'w2k12.test. SOA IN': request timed out.
 ---> System.Net.Sockets.SocketException (110): Connection timed out
   at TechnitiumLibrary.Net.SocketExtensions.UdpQueryAsync(Socket socket, ArraySegment`1 request, ArraySegment`1 response, IPEndPoint remoteEP, Int32 timeout, Int32 retries, Boolean expBackoffTimeout, Func`2 isResponseValid, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\SocketExtensions.cs:line 144
   at TechnitiumLibrary.Net.Dns.ClientConnection.UdpClientConnection.QueryAsync(DnsDatagram request, Int32 timeout, Int32 retries, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\ClientConnection\UdpClientConnection.cs:line 235
   --- End of inner exception stack trace ---
   at TechnitiumLibrary.Net.Dns.ClientConnection.UdpClientConnection.QueryAsync(DnsDatagram request, Int32 timeout, Int32 retries, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\ClientConnection\UdpClientConnection.cs:line 235
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass72_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4092
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass72_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4270
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass72_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4020
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.InternalResolveAsync(DnsDatagram request, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4371
   at TechnitiumLibrary.Net.Dns.DnsClient.InternalNoDnssecResolveAsync(DnsDatagram request, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4396
   at DnsServerCore.Dns.Zones.StubZone.RefreshZoneAsync(IReadOnlyList`1 nameServers) in Z:\Technitium\Projects\DnsServer\DnsServerCore\Dns\Zones\StubZone.cs:line 264

From my point of view, an option on the Zone setting to mute errors from transient domains would be very helpful, or at least minimise the information to one line. Currently, my logs are full of errors similar to the above (I have many transient test domains), which makes looking for real issues harder.

ShreyasZare commented 1 year ago

Thanks for the request. Will plan some option to suppress error logging for zones.