Sync dns with windows secondary zone

[volga629-1]

DNS server on linux vm with multiply interfaces .
I added secondary zone and trying to synchronize from Windows AD DNS.

The DNS server is directly accessible , I tested ports and everything is open ports like tcp and dup 53

Any help thank you.

Logs

[2025-06-12 00:02:58 Local] DNS Server has started zone refresh for Secondary zone: domain.com
[2025-06-12 00:03:01 Local] DNS Server failed to refresh 'domain.com' Secondary zone from: 10.100.11.1
System.Net.Sockets.SocketException (113): No route to host
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
   at TechnitiumLibrary.Net.Dns.ClientConnection.TcpClientConnection.GetConnectionAsync(CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\ClientConnection\TcpClientConnection.cs:line 182
   at TechnitiumLibrary.Net.Dns.ClientConnection.TcpClientConnection.SendDnsDatagramAsync(DnsDatagram request, Int32 timeout, Transaction transaction, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\ClientConnection\TcpClientConnection.cs:line 262
   at TechnitiumLibrary.Net.Dns.ClientConnection.TcpClientConnection.QueryAsync(DnsDatagram request, Int32 timeout, Int32 retries, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\ClientConnection\TcpClientConnection.cs:line 322
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass90_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4499
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass90_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4718
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.<>c__DisplayClass90_0.<<InternalResolveAsync>g__DoResolveAsync|1>d.MoveNext() in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4415
--- End of stack trace from previous location ---
   at TechnitiumLibrary.Net.Dns.DnsClient.InternalResolveAsync(DnsDatagram request, Func`3 getValidatedResponseAsync, Boolean doNotReorderNameServers, CancellationToken cancellationToken) in Z:\Technitium\Projects\TechnitiumLibrary\TechnitiumLibrary.Net\Dns\DnsClient.cs:line 4880
   at DnsServerCore.Dns.Zones.SecondaryZone.RefreshZoneAsync(IReadOnlyList`1 primaryNameServers, DnsTransportProtocol zoneTransferProtocol, TsigKey key, Boolean validateZone) in Z:\Technitium\Projects\DnsServer\DnsServerCore\Dns\Zones\SecondaryZone.cs:line 441

[ShreyasZare]

Thanks for the post and details. The error here is No route to host which indicates that there is no default route or a specific route on the host so its failing to connect to the destination address.

If you have configured "DNS Server IPv4 Source Addresses" in Settings then you need to either reset it to default 0.0.0.0 value or add the IP address of the network interface which is connected to the destination network.

[volga629-1]

Thank you for reply, under DNS Server IPv4 Source Addresses, I set to list IP of every interface.

[ShreyasZare]

Its best that you set the source addresses to default value 0.0.0.0. This option exists so that you can force the DNS server to use a specific network interface for outbound requests when there are multiple interfaces available. So setting IP of all interfaces does not make it useful.

[volga629-1]

Ok let me set back to 0.0.0.0