How come Software Updates and some installers do not work with IPNetRouter?
Due to limitations in Apple’s OS, IPNetRouter must run as an application. This makes IPNetRouter incompatible with any installer or updater that requires all other applications to be quit during software installation. Fortunately, this incompatibility does not effect client machines behind your IPNetRouter gateway. You can test whether an installer or updater may be incompatible with IPNetRouter by running it on a client machine first. If the Finder Desktop is lost during software installation, it is not one you should run on your IPNetRouter gateway without first quitting IPNetRouter. On your IPNetRouter gateway, you can work around most problem installers and updaters by quitting the IPNetRouter application and running the installer or updater as you normally would. After you have verified that the software has been configured properly, you may launch IPNetRouter and go back to using your Macintosh as a router/DHCP server again.