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[Archive] How Do I Enable NAT Traversal (NAT-T)?

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Article ID: KB4022 KB Last Updated: 04 Mar 2017Version: 11.0
Summary:

NS-Remote VPN client is connected successfully to firewall, but NS-Remote client cannot pass traffic through the VPN.   What Are the Minimum Requirements for NAT Traversal?

Symptoms:

Symptoms & Errors:
 

  • NetScreen-Remote client behind NAT device is not working
  • NS-Remote client Log Viewer reports error  "message not received!" in the Phase 1 negotiation:
       1-14: 15:24:13.167 My Connections\corporate - message not received! Retransmitting!
  • NS-Remote VPN client is connected successfully to firewall (SA is active), but NS-Remote client cannot pass traffic thru the VPN
  • Configuring NS-Remote client to have a public IP works, but then reconfiguring NS-Remote client, with private address and putting it behind NAT device, fails
  • Cannot send traffic across a VPN


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