User's Manual Part 1

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6. Disable PPTP passthrough: The PPTP passthrough is enabled by default. You can
disable here.
7. Disable L2TP passthrough: The L2TP passthrough is enabled by default. You can
disable here.
8. Disable IPSec passthrough: The IPSec passthrough is enabled by default. You can
disable here.
9. Stealth Mode: If enable this option, router will become “hidden” if someone uses port
scan utility to scan available ports on this router.
10. NAT Loopback: If enable this option, local hosts can access local virtual server via WAN
IP address of this router.
Click on “Save” to store your settings or click “Undo” to give up the changes.