I'm setting up a load balancer for my network. I have three options to select as a verification method if WAN is still alive:
Link Up (whether a modem is alive). This doesn't work for me because modem is alive even if a line is down.
IP Address for Ping. I would like to use this but I don't know what server should I choose.
DNS Lookup. This also may be an option.
Shall I select Ping or DNS? In both cases - what IP address should I use? (I cannot use a domain name - I need an IP address)