TP-Link TL-ER604W User Manual page 200

Step 4:
Enter Account Name and Password whatever you like, here we use "client" as account name,
password is "123456".
Step 5:
Under Tunnel, select Client-to-LAN.
Step 6:
The tunnel supports up to 10 connections, we enter 5 in this example.
Step 7:
Under IP Address Pool, select "group" we have added before.
Step 8:
Look for Status, select Active.
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