Microhard Systems IPN3G - Page 195

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Appendix G: Troubleshooting
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Question: I can connect the Carrier, but I can’t access the Internet/WAN/network from a connected PC?
Answer: Ensure that you have DHCP enabled or manually set up a valid IP, Subnet, Gateway and DNS
set on the local device.
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Question: I connected a device to the serial port of the IPn3G and nothing happens?
Answer: In addition to the basic serial port settings, the IP Protocol Config has to be configured. Refer to
the COM1/2 Configuration pages for a description of the different options.
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Question: How do I access the devices behind the modem remotely?
Answer: To access devices behind the IPn3G remotely, several methods can be used:
A. IP Passthrough - The IPn3G is transparent and the connected device can be access directly.
Refer to The IP-Passthrough Appendix for a detailed example of how this may be deployed.
B. Port Forwarding/DMZ - Individual external WAN ports are mapped to internal LAN IP’s and
Ports. See the Port-Forwarding Appendix for a detailed example.
C. VPN - A tunnel can be created and full access to remote devices can be obtained. Required
the use of multiple modems or VPN routers. See the VPN Appendix on an example of how to set
up a VPN.
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Question: I have set up firewall rules and/or port forwarding rules but they do not work?
Answer: Ensure that the Firewall is turned ON. Even port forwarding requires that the firewall feature is
enabled. Also, ensure the WAN request is enabled. If blocked, additional rules will need to be
created for any external request.
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Question: I have Internet/WAN access but I cannot ping the device remotely?
Answer: Ensure that the WAN request is enabled in the Firewall settings.
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Question: I have Internet/WAN access but I cannot ping the device remotely?
Answer: Ensure that the WAN request is enabled in the Firewall settings.
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Question: I’m using IP-Passthrough but the serial ports won’t work?
Answer: When using IP-Passthrough, the WAN IP is assigned to the device connected to the Ethernet
port, all traffic is passed through to that device. As a result serials port will not work. The only
port not being passed through is the remote management port (default port 80), which can be
changed in the security settings.