Windows Error 651 — PPPoE Connection Failed
Warningnetwork
Overview
Windows network error 651 means the modem or connection device has reported an error during a PPPoE connection attempt.
Key Details
- Connection failed with error 651 — PPPoE dial-up error
- Common with DSL and fiber connections using PPPoE
- Affects the RAS (Remote Access Service) component
- May require modem or router restart
Common Causes
- ISP connection issues or outage
- Corrupted raspppoe.sys driver file
- Network adapter misconfiguration
- Modem or router firmware issues
Steps
- 1Restart modem and router — wait 30 seconds between
- 2Delete and recreate the PPPoE connection
- 3Replace raspppoe.sys from a working Windows installation
- 4Disable IPv6 on the network adapter
Tags
windowsnetworkpppoe connection failedwindows-errorfix
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WarningFrequently Asked Questions
Point-to-Point Protocol over Ethernet — used by many DSL and fiber ISPs for authentication.