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DucTran's avatar
DucTran
Copper Contributor
Jun 02, 2025

DNS Server cannot lookup domain AWS

Hi Everyone,

I have an issue with the DNS service on Windows Server 2019. I have a CNAME record pointing from an internal domain to a domain hosted on Route53. However, this record frequently returns an 'unknown host' error. My server is already connected to the internet, and the record has a TTL 60. Please help me with this case.

Windows Server

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  • LennoxFrostglen's avatar
    LennoxFrostglen
    Iron Contributor
    Jun 11, 2025

    Verify Basic Connectivity

    Test-NetConnection -ComputerName "your.route53.domain" -Port 53

    Ensure your DNS server can actually reach Route53's DNS servers (usually on port 53).

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