5.1.3.1.5. ON VPNGW

In this topic, we will explore several troubleshooting commands to diagnose and resolve VPN connectivity issues.

  • Dig: Allows us to perform basic troubleshooting related to DNS.

dig @SERVER -x REVERSE_LOOKUP NAME TYPE

Example:

../../../../_images/vpngw_1.png


  • Ping: It allows us to verify connectivity with another node within the network.

ping IP -c REPETITIONS

Example:

../../../../_images/vpngw_2.png


  • Traceroute: Useful to verify the routes used in the network.

traceroute IP

Example:

../../../../_images/vpngw_3.png


  • Tcpdump: Allows us to observe the network traffic of the VPN Gateway node interfaces.

tcpdump -i INTERFACE -W PATH_TO_SAVE_FILE -c COUNT

Example:

../../../../_images/vpngw_4.png