Connectivity
656 Check Point UTM-1 Edge User Guide
I am using the UTM-1 appliance behind another NAT device, and I am having problems with
some applications. What should I do?
By default, the UTM-1 appliance performs Network Address Translation (NAT). It is
possible to use the UTM-1 appliance behind another device that performs NAT, such as a
DSL router or Wireless router, but the device will block all incoming connections from
reaching your UTM-1 appliance.
To fix this problem, do ONE of the following. (The solutions are listed in order of
preference.)
• Consider whether you really need the router. The UTM-1 appliance can be used
as a replacement for your router, unless you need it for some additional
functionality that it provides.
• 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
UTM-1 appliance’s external IP address.
• Open the following ports in the NAT device:
• UDP 9281/9282
• UDP 500
• UDP 2746
• TCP 256
• TCP 264
• ESP IP protocol 50
• TCP 981
I cannot receive audio or video calls through the UTM-1 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
331.
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
331.
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