After you upgrade from WEBppliance 3.x to WEBppliance Pro 3.5 perl CGIs will not work because CGI.pm was provided by the perl RPM in RedHat 7.1 & 7.2. In RedHat 7.3 CGI.pm is provided by perl-CGI which is not installed by WEBppliance. So after an upgrade perl CGIs will stop working. To fix this problem you can install perl-CGI on to your server, you can download it from:
You should also install this on any new servers as well. As this RPM is not installed on WEBppliance for Linux Pro LH new installs (dedicated & private servers). On WEBppliance for Linux Pro LS its installed as part of the RedHat 7.3 install.