IPv4 routes (added OpenConnect) not respected, race condition?

Title: Troubleshooting OpenConnect VPN Connection Issues: Modifying the vpnc-win.js Script for Split Network and Routing Specific Subnets

In this article, we will discuss how to troubleshoot OpenConnect VPN connection issues, focusing on modifying the vpnc-win.js script for split network and routing specific subnets.

Understanding OpenConnect VPN

OpenConnect is an open-source SSL VPN client, which is widely used for campus VPN connections. It allows users to securely access resources on a remote network, such as a university network, from an untrusted network, like a public Wi-Fi hotspot.

Modifying the vpnc-win.js Script

When using OpenConnect, you may encounter issues like connection failures or routing problems. To address these issues, you can modify the vpnc-win.js script to set the split network and route specific subnets through the VPN.

1. Split Network: To enable split network, add the following lines to the vpnc-win.js script:

var split = "split";
var split_gateway = "192.168.1.1"; // Replace with your gateway IP

2. Routing Specific Subnets: To route specific subnets through the VPN, use the route command. For example, to route subnet 10.0.0.0/8, add the following lines to the script:

var route = [
  "10.0.0.0 255.0.0.0",
  "route add 10.0.0.0 mask 255.0.0.0 " + split_gateway
];

Replace 10.0.0.0/8 with the subnet you want to route through the VPN.

Running the Modified Script

After modifying the vpnc-win.js script, save it and run the OpenConnect client using the modified script.

Troubleshooting

If you still encounter issues, ensure that the script is properly formatted and the indentation and tabulation are correct according to the programming language. Also, check if the OpenConnect client is running the latest version and if there are any known issues with your VPN server.

References

• OpenConnect: https://openconnect.org/
• OpenConnect Windows Client: https://github.com/OpenVPN/openconnect-windows
• Modifying vpnc-win.js for Split Network: https://forums.openvpn.net/viewtopic.php?t=13159
• Routing Specific Subnets: https://openvpn.net/vpn-server-resource-center/routing-specific-subnets/