I am receiving the NAT unfriendly alert on my VPN status page. Does this alert can cause the VPN not going up?
Go to Solution.
Yes it could.
It means there is something doing NAT in front of the MX. You could try upgrading the firmware of whatever that device is to resolve the problem. There is also a troubleshooting guide here:
You could also manually forward a UDP port on that upstream router to the MX and configure the MX to use manual NAT traversal.
This guide includes a screenshot:
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