Which configuration file is essential for implementing split tunneling in IPsec VPNs?

The correct configuration file crucial for implementing split tunneling in IPsec VPNs is the .SCX file. This file type is specific to Sophos XG Firewall and contains necessary configurations for creating and managing VPN setups, including settings related to split tunneling.

Split tunneling allows VPN users to access resources on both the secure VPN network and their local network simultaneously. The .SCX file contains the specifications and rules that tell the firewall how to handle traffic destined for the Internet versus traffic directed towards the VPN. Properly configuring this file ensures that only specific traffic is sent through the VPN tunnel, while other data types can go through a direct connection to the Internet.

Without the correct settings within the .SCX file, split tunneling cannot operate effectively, resulting in either all traffic being sent through the VPN, which can slow down performance, or improperly routed traffic that can cause connectivity issues. Thus, the .SCX file is vital for the successful implementation of split tunneling in IPsec VPN configurations.