This document is quite useful if what we have is several servers with the Web Interface service or with the Program Neighborhood Agent and what we want is to balance between them, that is, if one of the servers goes down or we turn it off, we don't have to do anything on the users' PCs so that they continue to work normally. To do this, it will be necessary to configure it on servers that have W.I.. a cluster with NLB, I mean, create an IP address “virtual” to which clients will connect and this IP address “virtual” connect to hosts that are lifted, to one server or another; both for W.I. How to stop PNA.