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VPN Tunnel status changes to DOWN/UP randomly on 1100 gateway Technical Level
Symptoms
  • VPN Tunnel status changes to DOWN/UP randomly on 1100 gateway when VPN gateway is configured with different IP address in Machine's IP address (Gateway General Properties : IPv4 address) and Selected address from topology table(IPSec VPN : Link Selection).
    reason: Client Encryption: TUNNEL STATUS CHANGE: gw772sb has changed status to DOWN
    reason: Client Encryption: TUNNEL STATUS CHANGE: gw772sb has changed status to UP
    
  • The log of tunnel_test (18234) packet has dropped with "message_info: Connection contains real IP of NATed address)".

  • This is is only an SMB issue. It has not been seen on other 2012 appliance.
Cause

There were tunnel tests sent to more than one of the gateway's interfaces.


Solution
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