For the IP address, it’s required by NACCS to access the system. Check this website http://whatismyipaddress.com to identify your IP address; basically, all internet service provider (ISP) assign Dynamic IP address (assign a different IP address each time when log on to the computer) so contact your ISP to apply Static IP address (one customer on one IP address).
I have also been questioning ISID on the IP address issue as almost ISP assign Dynamic IP address caused us unable to access the system. However, ISID has not yet answered me until now.