IP Manager - VPN

So was trying to setup a VPN connection between two AirlInk devices and I’m not able to use anything but an IP in the remote address field. I was reading over the IP manager book and I saw this caption, " DNS: Using Names Instead of IP addresses. The modem has the ability to query DNS servers in order to translate domain names into IP addresses. This allows you to use domain names in place of IP addresses for most of the configuration options requiring IP addresses. My question is does this include VPN tunnels?