MR5135
Synology MR5135 VPN Tunnel Error
Synology
VPN Tunnel Error
MR-Series
84% fix rate
Cause
IKEv2 phase 1 negotiation failed with peer
Fix Steps
- Verify VPN server address and port configuration
- Check VPN credentials are current and not expired
- Ensure correct VPN protocol is selected (IKEv2/IPSec recommended)
- Verify firewall rules allow VPN traffic on required ports
- Try switching between UDP and TCP protocols
- Update VPN client to latest version