User's Manual Part 3

Connectivity
Chapter 16: Troubleshooting 445
• Consider whether you really need the router. The Safe@Office appliance
can be used as a replacement for your router, unless you need it for some
additional functionality that it provides, such as Wireless access.
• If possible, disable NAT in the router. Refer to the router’s documentation
for instructions on how to do this.
• If the router has a “DMZ Computer” or “Exposed Host” option, set it to the
Safe@Office appliance’s external IP address.
• Open the following ports in the NAT device:
• UDP 9281/9282
• UDP 500
• TCP 256
• TCP 264
• ESP IP protocol 50
• TCP 981
I cannot receive audio or video calls through the Safe@Office appliance. What should I do?
To enable audio/video, you must configure an IP Telephony (H.323) virtual server.
For instructions, see Configuring Servers on page 209.
I run a public Web server at home but it cannot be accessed from the Internet. What should I
do?
Configure a virtual Web Server. For instructions, see Configuring Servers on page
209.
I cannot connect to the LAN network from the DMZ or WLAN network. What should I do?
By default, connections from the DMZ or WLAN network to the LAN network are
blocked. To allow traffic from the DMZ or WLAN to the LAN, configure
appropriate firewall rules. For instructions, see Using Rules on page 211.