Nokia IP40 User Manual page 217

I am using the Nokia IP40 Security Platform with another DSL/Cable router, and I am
having problems with some applications.
The IP40 performs network address translation (NAT). You can use the IP40 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 IP40.
To fix this problem, do one of the following. (The solutions are listed in order of preference.)
Consider whether you really need the router. You can use the IP40 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. For instructions on how to do this, see the router's
documentation.
The following suggestions will work only if the router is connected to the WAN port of IP40:
If the router has a DMZ computer option, set it to the IP40 external IP address.
Set the router to direct all incoming connections to the external IP address of IP40.
Keep in mind that if you use IP40 behind another NAT device, you might lose some of the
advantages of the IP40, such as broad application support and high performance.
I cannot open http://my.firewall page when the LAN address is changed. What should I
do?
Renew the IP address of the computer using ipconfig.
I cannot connect to the HTTPS server in the DMZ. What should I do?
Ensure that HTTPS access to the device is enabled.
I cannot establish HTTPS session to the device even when the HTTPS access to the device
is permitted. What should I do?
Ensure that the browser supports 128-bit cipher strength.
I cannot send SMTP or POP3 traffic across the Device what should I do?
Do one of the following: (The solutions are listed in order of preference)
If antivirus scanning is on, try turning it off.
If the antivirus is required, then make sure that the CVP server and SMTP server in the
server page of SMC are correctly configured.
I cannot send HTTP traffic across the IP40. What do I do?
Do one of the following (The solutions are listed in order of preference.):
If Web-filtering scanning is on, try turning it off.
If the URL filtering is required, then make sure the UFP server in the server page of SMC is
correctly configured.
I cannot connect to SmartCenter FP3 VPN site using IP40 Satellite X when using Dynamic
IP with certificate support (DAIP). What should I do?
Check for the installed certificate in VPN > Certificate.
Check for the following error messages in Reports > Event Log:
Nokia IP40 Security Platform User's Guide v1.1
Frequently Asked Questions
217