ZyXEL Communications VPN Series Handbook page 153

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address (in the example, 172.100.110.1). Select Fall back to Primary Peer Gateway
when possible and set desired Fall Back Check Interval time.
Type a secure Pre-Shared Key (8-32 characters) which must match your Hub_HQ's
Pre-Shared Key and click OK.
CONFIGURATION > VPN > IPSec VPN > VPN Gateway
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