The client inserts a virtual network interface (usually f5tun or similar). You must ensure tun module is loaded:

lsmod | grep tun
# If empty, run:
sudo modprobe tun
echo "tun" | sudo tee -a /etc/modules

f5fpc -s -t vpn.company.com -u your_username -p your_password

Parameters explained:

Solution: Disable IPv6 for the VPN connection in NetworkManager settings, or add a custom script to flush routes.

There are two ways to get the client:

Cause: The binary isn't in your $PATH. Fix: The standard location is /opt/f5/access/edge-client/bin/f5fpc. Create an alias:

alias f5fpc='/opt/f5/access/edge-client/bin/f5fpc'