VPN/Proxy

Verify the VPN connection

1. Verify configured network interfaces

   • Ensure that additional interfaces (on top of the default ones such as eth0 and lo) are added

   • Some other names are: tun0, tun1, etc.

$ ifconfig
# or
$ ip a

eth0 ...
lo ...
vpn_provider_wg ... # VPN provider interface (WireGuard)

1. Verify public IP address (Ensure there is no IP leak)

   • Ensure that the address of the VPN server is displayed instead

$ curl ifconfig.me
[vpn_ip_addr]

1. Verify DNS resolution

   • For most cases, the VPN provider will update the /etc/resolv.conf file to include their own DNS server address(es).

   • Trusted and secure DNS servers such as Google (1.1.1.1) and Cloudflare (8.8.8.8) may be used too.

$ cat /etc/resolv.conf

nameserver [vpn_dns_server1]
nameserver [vpn_dns_server2]
nameserver ...

Note: Some VPNs use systemd-resolved or other resolvers, so DNS settings might be managed elsewhere (/run/systemd/resolve/resolv.conf).

1. Verify if there are WebRTC, DNS or IP leaks.

   • This step presents another method to test for IP leak

   • Additional tests for WebRTC and DNS leaks should be performed too

   Website to run the test: https://browserleaks.com.