ZyXEL Communications Parental Control Gateway HS100/HS100W - Manual (Page 352)

HomeSafe User’s Guide
K-2 Triangle Route
Step 1. A computer on the LAN initiates a connection by sending a SYN packet to a receiving server
on the WAN.
Step 2. The HomeSafereroutes the packet to Gateway B which is in Subnet 2.
Step 3. The reply from WAN goes through the HomeSafeto the computer on the LAN in Subnet 1.
Diagram K-3 IP Alias
Gateways on the WAN Side
A second solution to the “triangle route” problem is to put all of your network gateways on the
WAN side as the following figure shows. This ensures that all incoming network traffic passes
through your HomeSafeto your LAN. Therefore your LAN is protected.
Diagram K-4 Gateways on the WAN Side
How To Configure Triangle Route:
Step 1. From the SMT main menu, enter 24.
Step 2. Enter “8” in menu 24 to enter CI command mode.
Step 3. Use the following commands to allow/disallow triangle route.
sys firewall ignore triangle all
off This command allows triangle route.
sys firewall ignore triangle all on This command disallows triangle route.