find-gw.sh

A bash script to check if you have a gateway that could get you somewhere nice.

usage

First, make sure you have nping.
Next, download the script and run it. nping is going to want root for icmp, so use sudo or something similar.

curl -fsSL https://raw.githubusercontent.com/leonjza/find-gw/master/find-gw.sh -o find-gw.sh
# read the source code, right?
chmod +x find-gw.sh
sudo ./find-gw.sh 8.8.8.8

example

$ sudo ./find-gw.sh 8.8.8.8
[info] Trying ARP entries to reach 8.8.8.8...
[success] Could reach 8.8.8.8 via xx:xx:xx:xx:xx:xx => gw.local (10.0.0.11) at xx:xx:xx:xx:xx:xx on eth0
[success] Could reach 8.8.8.8 via xx:xx:xx:xx:xx:xx => ap.local (10.0.0.20) at xx:xx:xx:xx:xx:xx on eth0
[info] Done!

other

Sometimes, your ARP table won't have all of the entries availble on the LAN. Solve that by pinging a broadcast address. Assuming you are in a network like 192.168.5.0/24, try:

# Linux
ping -b 192.168.5.255

# macOS
ping 192.168.5.255