dropcheck

dropcheck is a command line tool for diagnosing IPv4/IPv6 network connectivity.

This script does...

Send ICMP packet to the gateway Address
- Currently, this script regards a gateway address as first host address of the specified network: that is, when you specify the subnet 172.16.100.0/24, this script regards 172.16.100.1 as a gateway address. It is also same as IPv6. (When you specify fc00:dead:beef:1234::/64, the gateway adress will be fc00:dead:beef:1234::1)
Send ICMP packet to the external server
Querying DNS record (A record for IPv4, AAAA record for IPv6)
Open Browser for diagnosing web browsing.

Install

go get github.com/skjune12/dropcheck

After running go get, the execution file will be created in $GOPATH/bin if you set $GOPATH collectly.

dropcheck -cidr 172.16.100.0/24

dropcheck -cidr fc00:dead:beef:1234::/64