You may perform troubleshooting steps below.
- Check your laptop public IP address. You can user WhatIsMyIP to identify that information.
- Start the Network Capture at
http://<LAN IP>/cgi-bin/MANGA/support.cgi
. - Initiate the L2TP/IPSec until you see the connection attempt fails.
- Stop and download the Network Capture.
- Extract and open the WAN pcap file with Wireshark.
- Filter the pcap file with your public IP obtain from (1) to confirm whether L2TP/IPSec connection hits the WAN interface.
If the L2TP/IPSec connection hits the WAN interface, please open ticket and turn on Remote Assistance for us to take a closer look. Else, the packet is dropped somewhere before reaching WAN interface of Balance 305. You may need to check with your ISP.