Medium
Operating Systems
✓ Solution Verified by Community (0+ upvotes)
How to fix error error-ipsec-ike-cga-auth-failed in Windows 11
ERROR_IPSEC_IKE_CGA_AUTH_FAILED = 13892
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | error-ipsec-ike-cga-auth-failed |
|---|---|
| Affected System | Windows 11 (Microsoft) |
| Difficulty | Medium |
| Estimated Time | 15 min |
| Requires Admin Rights | ⚠️ Yes |
| Requires Reboot | 🔄 Yes |
Solution Steps
- 1 First, check if IPv6 is enabled on your network adapter. Press Windows key + R, type 'ncpa.cpl', and press Enter. Right-click your active network connection and select 'Properties'.
- 2 Ensure 'Internet Protocol Version 6 (TCP/IPv6)' is checked. If not, check it and click OK.
- 3 If IPv6 is enabled, try disabling it temporarily to see if the error goes away. Uncheck the IPv6 option and click OK. Then try your VPN connection. If it works, the issue is with IPv6 configuration.
- 4 If you need IPv6, reset the IPv6 settings. Open Command Prompt as administrator and run 'netsh int ipv6 reset'. This resets the IPv6 configuration to default.
- 5 Reboot your PC.
- 6 If the error persists, check your VPN client's settings for any IPv6-specific options. Some clients have a 'Use IPv6' toggle — try disabling it.
- 7 Finally, ensure your network drivers are up to date. Go to Device Manager (Win+X → Device Manager), expand 'Network adapters', right-click your adapter, and select 'Update driver'. Choose 'Search automatically for updated driver software'.
🔍 Didn't work? Enter your GPU and CPU for hardware-specific advice:
🔧 Still having issues?
Describe your exact problem to Error Buddy and get a personalized fix in seconds.
🛠️ Try Error Buddy — It's Free