ZyWALL 35 Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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K28. How can I keep a tunnel alive?
To keep a tunnel alive, you can check "Nailed-up" option when configuring your VPN tunnel. With this
option, the ZyWALL will keep IPSec tunnel up at all time. With “Nailed-up”, the ZyWALL will try to
establish whenever tunnel is terminated due to any unknown reason.
K29. Single, Range, Subnet, which types of IP address does ZyWALL support in
VPN/IPSec?
All ZyWALL series support single, range, and subnet configuration for VPN IPSec. In other words, you
can specify a single PC, a range of PCs or even a network of PCs to utilize the VPN/IPSec service.
K30. Does ZyWALL support IPSec pass-through?
Yes, ZyWALL can support IPSec pass-through. ZyWALL series don't only support IPSec/VPN gateway, it
can also be a NAT router supporting IPSec pass-through.
If the VPN connection is initiated from the security gateway behind ZyWALL, no configuration is
necessary for neither NAT nor Firewall.
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