Github user shwetaag commented on the pull request: https://github.com/apache/cloudstack/pull/729#issuecomment-134030869 @remibergsma : i have added details to the bug . Copy pasting for your reference To have Active FTP working in isolated networks VRs need the have the following modules loaded (In order to map the FTP Data and FTP CMD to the same frontend IP): modprobe nf_conntrack_ftp modprobe nf_nat_ftp in some versions of Cloudstack we noted that these modules are not loaded on CS Routers by default . So this test case is for verifying that these modules are loaded by default in VR and if not report an error
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