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[client] Windows Client Uses Default DNS Server Instead of Custom DNS Configuration in Netbird #1770

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opened 2025-11-20 06:06:23 -05:00 by saavagebueno · 0 comments
saavagebueno commented 2025-11-20 06:06:23 -05:00
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Originally created by @Cikaros on GitHub (Apr 3, 2025).

I am experiencing an issue where a Windows client within the Netbird environment is not respecting the custom DNS server configuration, reverting to the default DNS server instead. Here are the details of my setup and the observed behavior:

Configuration:

Custom DNS server IP: 10.10.1.100:53
Custom DNS suffix: .xxx.local
Default Netbird DNS server IP (assumed): 100.32.255.254:53
Default Netbird DNS suffix: .netbird.local
Expected Behavior:

Windows client should use the custom DNS server (10.10.1.100) for queries related to the .xxx.local namespace.
Observed Behavior:

On macOS, the custom DNS server configuration is correctly deployed and functional.
On Windows, while netbird status --detail shows the custom DNS server is configured correctly, querying via PowerShell (Get-DnsClientNrptPolicy) reveals the NameServers field lists 100.32.255.254 instead of the intended custom DNS.
PowerShell Output:

Namespace                        : .32.100.in-addr.arpa
QueryPolicy                      :
SecureNameQueryFallback          :
DirectAccessIPsecCARestriction   :
DirectAccessProxyName            :
DirectAccessDnsServers           :
DirectAccessEnabled              :
DirectAccessProxyType            : NoProxy
DirectAccessQueryIPsecEncryption :
DirectAccessQueryIPsecRequired   : False
NameServers                      : 100.32.255.254
DnsSecIPsecCARestriction         :
DnsSecQueryIPsecEncryption       :
DnsSecQueryIPsecRequired         : False
DnsSecValidationRequired         : False
NameEncoding                     : Utf8WithoutMapping

Namespace                        : .netbird.local
QueryPolicy                      :
SecureNameQueryFallback          :
DirectAccessIPsecCARestriction   :
DirectAccessProxyName            :
DirectAccessDnsServers           :
DirectAccessEnabled              :
DirectAccessProxyType            : NoProxy
DirectAccessQueryIPsecEncryption :
DirectAccessQueryIPsecRequired   : False
NameServers                      : 100.32.255.254
DnsSecIPsecCARestriction         :
DnsSecQueryIPsecEncryption       :
DnsSecQueryIPsecRequired         : False
DnsSecValidationRequired         : False
NameEncoding                     : Utf8WithoutMapping

Namespace                        : .xxx.local
QueryPolicy                      :
SecureNameQueryFallback          :
DirectAccessIPsecCARestriction   :
DirectAccessProxyName            :
DirectAccessDnsServers           :
DirectAccessEnabled              :
DirectAccessProxyType            : NoProxy
DirectAccessQueryIPsecEncryption :
DirectAccessQueryIPsecRequired   : False
NameServers                      : 100.32.255.254
DnsSecIPsecCARestriction         :
DnsSecQueryIPsecEncryption       :
DnsSecQueryIPsecRequired         : False
DnsSecValidationRequired         : False
NameEncoding                     : Utf8WithoutMapping
Originally created by @Cikaros on GitHub (Apr 3, 2025). I am experiencing an issue where a Windows client within the Netbird environment is not respecting the custom DNS server configuration, reverting to the default DNS server instead. Here are the details of my setup and the observed behavior: Configuration: Custom DNS server IP: 10.10.1.100:53 Custom DNS suffix: .xxx.local Default Netbird DNS server IP (assumed): 100.32.255.254:53 Default Netbird DNS suffix: .netbird.local Expected Behavior: Windows client should use the custom DNS server (10.10.1.100) for queries related to the .xxx.local namespace. Observed Behavior: On macOS, the custom DNS server configuration is correctly deployed and functional. On Windows, while netbird status --detail shows the custom DNS server is configured correctly, querying via PowerShell (Get-DnsClientNrptPolicy) reveals the NameServers field lists 100.32.255.254 instead of the intended custom DNS. PowerShell Output: ``` Namespace : .32.100.in-addr.arpa QueryPolicy : SecureNameQueryFallback : DirectAccessIPsecCARestriction : DirectAccessProxyName : DirectAccessDnsServers : DirectAccessEnabled : DirectAccessProxyType : NoProxy DirectAccessQueryIPsecEncryption : DirectAccessQueryIPsecRequired : False NameServers : 100.32.255.254 DnsSecIPsecCARestriction : DnsSecQueryIPsecEncryption : DnsSecQueryIPsecRequired : False DnsSecValidationRequired : False NameEncoding : Utf8WithoutMapping Namespace : .netbird.local QueryPolicy : SecureNameQueryFallback : DirectAccessIPsecCARestriction : DirectAccessProxyName : DirectAccessDnsServers : DirectAccessEnabled : DirectAccessProxyType : NoProxy DirectAccessQueryIPsecEncryption : DirectAccessQueryIPsecRequired : False NameServers : 100.32.255.254 DnsSecIPsecCARestriction : DnsSecQueryIPsecEncryption : DnsSecQueryIPsecRequired : False DnsSecValidationRequired : False NameEncoding : Utf8WithoutMapping Namespace : .xxx.local QueryPolicy : SecureNameQueryFallback : DirectAccessIPsecCARestriction : DirectAccessProxyName : DirectAccessDnsServers : DirectAccessEnabled : DirectAccessProxyType : NoProxy DirectAccessQueryIPsecEncryption : DirectAccessQueryIPsecRequired : False NameServers : 100.32.255.254 DnsSecIPsecCARestriction : DnsSecQueryIPsecEncryption : DnsSecQueryIPsecRequired : False DnsSecValidationRequired : False NameEncoding : Utf8WithoutMapping ```
saavagebueno added the questiondns labels 2025-11-20 06:06:23 -05:00
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Reference: SVI/netbird#1770
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