Coturn: stun and multiple IPs and DNS

Hi,

coturn recommends to use at least two IPs for stun. From my understanding it’s just a second listening-ip= entry in /etc/turnserver.conf like

listening-ip=1.1.1.1
listening-ip=1.1.1.2

And must both IPs revolve to the same DNS name?

Cheers!
M.