ZyXEL Communications ZyWALL USG FLEX 100 - Page 192

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Then, go to VPN > Branch Office VPN > Gateway > Phase 1 Settings to select
negotiation Mode the same as your ZyWALL/USG’s Phase 1 Settings. Make sure
you enable both NAT Traversa and Dead Peer Detection options if both options
are enabled in the ZyWALL/USG.
VPN > Branch Office VPN > Gateway > Phase 1 Settings
Use Transform Settings to create the same security settings as in the ZyWALL/USG
Phase 1 settings. Click OK and Save to exit the Transform Settings page.
VPN > Branch Office VPN > Gateway > Phase 1 Settings > Transform Settings