Question
Does changing my DNS server address help with Error 509?
Asked by: USER1952
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Answer (56)
Yes, sometimes. Your DNS server might be providing incorrect information about the server's certificate. Try switching to a public DNS server like Google DNS (8.8.8.8 and 8.8.4.4) or Cloudflare DNS (1.1.1.1 and 1.0.0.1). Instructions vary depending on your operating system.