Can a firewall cause PPPoE errors?

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Grade: Education Subject: Support
Can a firewall cause PPPoE errors?
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Yes, a firewall (either on your computer or router) can interfere with PPPoE connections. Temporarily disable the firewall to see if it resolves the error. If so, you'll need to create firewall rules to allow PPPoE traffic (protocol 1720) to pass through. Consult your firewall documentation for details.