The root name is hardcoded to be the domain name only. Hence, accessing the IP won't work.

liveSearchRoot = "$bootstrap.domainName";

testing on my local machine
http://localhost:8080/plugins/livesearch/livesearch.action OK

http:// <IP address>:8080/plugins/livesearch/livesearch.action can't establish a connection to the server at <IP address>:8080.

the same for CAC

Fix: java script should determine where the request was made from and allow to access the IP and the domain name