MR1756
Synology MR1756 VPN Tunnel Error
Synology
VPN Tunnel Error
RT-Series
84% fix rate
Cause
IPSec ESP packet decryption failure
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