Reference Manual for th e Pr oSafe VPN F irewall 25 with 4 Gigabi t LAN a nd Dual WAN Por ts
Connecting the FVS124G to the Internet 4-23
202-10085-01, March 2005

Step 6: Configure the WAN Options (If Needed)

Perform the following steps to configure the WAN options:
1. If you haven’t already, log in to the firewall at its default LAN address of http://192.168.1.1
with its default user name of admin, default password of password, or using whatever
password and LAN address you have chosen for the firewall.
2. From the Main Menu of the browser interface, under WAN Setup, click on Options. You will
get the WAN1 screen shown in Figure 4-10 and can get the WAN2 screen from there using the
pulldown.
Figure 4-10: WAN Options Screens
3. Edit the default information you want to change.
• MTU Size—The normal MTU (Maximum Transmit Unit) value for most Ethernet
networks is 1500 Bytes, or 1492 Bytes for PPPoE connections. For some ISPs you may
need to reduce the MTU. But this is rarely required, and should not be done unless you are
sure it is necessary for your ISP connection.
Note: If your ISP assigns a private WAN IP address such as 192.168.x.x or 10.x.x.x, the
dynamic DNS service will not work because private addresses will not be routed on the
Internet.