I am a new in Qualys PCI scan, and we have a few servers (Windows Server 2008 R2 SP1, and Server 2010 STD) couldn't authenticate for the internal PCI scan so that we could not get a scan result properly. I applied to run SCW to lock down most of non useable services and registries, and those servers have Windows Firewall Rules are turned on as well. I assume SCW disabled a service or ports that required for Qualys Scan with authenticated. If I need to open any ports for PCI scan on the Windows firewall, which ports should I open? Would you please let me know ?