ZyXEL Communications P-202 - Manual (Page 351)

P-202H Plus v2 Support Notes
2. Setup VPN in branch office B
Be very careful about the remote IP address in branch office B, because for
systems behind branch office B want to systems behind branch office A and
headquarter, we have to specify these two segments in Remote section.
However if we include these two segments in one rule, the LAN segment of
branch office B will be also included in this single rule, which means
intercommunication inside branch office B will run into VPN tunnel. To avoid such
situation, we need two separate rules to cover the LAN segment of branch office
A and headquarter.
1. The first rule in Branch_ B.
This rule is for branch office B to access headquarter.
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