apple_captive_test | Download Apple's captive portal test |
is_online | Is the computer online? |
is_up | Check if a port of a server is active, measure response time |
my_ip | Query the computer's public IP address |
nsl | DNS query |
ping | Ping a remote server, to see if it is alive |
ping_port | Check if a port of a server is active, measure response time |