He probably is referring to something like I have on my site such as a gametracker banner. You can see whos in the server from their site but its only updated every so often , the banner just shows like the server name/type/amount of players. I could post one but cba since im posting from my dinosaur phone :p,just look up on google infinity community rpg jailbreak and it'll probably pop up.
EDIT: yep,3rd result.