Network monitoring

Ping reachability of internal devices from inside a network the site1.erralert.com checker cannot reach (LAN, VPN-only, etc.).

powershell

Ping multiple devices

Pings a list of IPs/hostnames from inside your network and reports which are unreachable. Use this to check LAN-only or VPN-only devices that the public-internet site1.erralert.com checker cannot reach.