ZyXEL Communications ZyWall ATP series - What Could Go Wrong

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What Could Go Wrong?
7 If you see [alert] log message such as below, please check ZyWALL/USG L2TP
Allowed User or User/Group Settings. Android users must use the same Username
and Password as configured in ZyWALL/USG to establish the L2TP VPN.
8 If you see [info] or [error] log message such as below, please check ZyWALL/USG
Phase 1 Settings. Android users must use the same Pre-Shared Key as configured
in ZyWALL/USG to establish the IKE SA.
9 If you see that Phase 1 IKE SA process has completed but still get [info] log
message as below, please check ZyWALL/USG Phase 2 Settings. ZyWALL/USG unit
must set correct Local Policy to establish the IKE SA.
10 Ensure that the L2TP Address Pool does not conflict with any existing LAN1, LAN2,
DMZ, or WLAN zones, even if they are not in use.