ZyXEL Communications ZyWall 10 Reference Manual page 22

ZyWALL 10~100 Series Internet Security Gateway
4. Select Internet Protocol (TCP/IP) (under the
General tab in Win XP) and click Properties.
5. The Internet Protocol TCP/IP Properties
window opens (the General tab in Windows XP).
-If you have a dynamic IP address click Obtain
an IP address automatically.
-If you have a static IP address click Use the
following IP Address and fill in the IP address,
Subnet mask, and Default gateway fields.
Click Advanced.
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Setting Up Your Computer's IP Address