When selecting the "Restart Now" option in the Management Console (Maintenance > System and Disks > Tasks > Restart Now) the ISG proxy does not restart.
This is a known issue that only affects ISG proxy devices.
Resolution: Restart using the CLI or SGAC from Management Center.
ProxySG>
ProxySG>en
Enable Password:
ProxySG#
ProxySG#restart ?
abrupt Reboot system abruptly, according to restart settings
regular Reboot system according to restart settings
upgrade Reboot system to start running new image
ProxySG#restart