Question
What is the role of a firewall in causing Roblox Error 509?
Asked by: USER7682
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Answer (59)
Your firewall might be blocking Roblox's connection to the server or interfering with the SSL/TLS handshake. Temporarily disabling your firewall (use caution!) can help determine if it's the cause. If so, add Roblox as an exception to your firewall rules.