cmsrel CMS_5_3_32 timeout

Hi, I have installed CMS VM 1.5.3 correctly and it works correctly. However it appears when I type “cmsrel CMSSW_5_3_32” (I have checked it from command “scram list”), the terminal returns:
“Waiting for release information to be obtained via https://cmssdt.cern.ch/SDT/releases.map?release=CMSSW_5_3_32&architecture=slc6_amd64_gcc472&scram=V2_2_9_pre22&releasetop=/cvmfs/cms.cern.ch/slc6_amd64_gcc472/cms/cmssw/CMSSW_5_3_32 (timeout in 7s)
WARNING: Reading release information from https://cmssdt.cern.ch/SDT/releases.map?release=CMSSW_5_3_32&architecture=slc6_amd64_gcc472&scram=V2_2_9_pre22&releasetop=/cvmfs/cms.cern.ch/slc6_amd64_gcc472/cms/cmssw/CMSSW_5_3_32 is timed out, ignoring any release checks.” and nothing else happened.

I had similar problems when using docker to install different versions of cmssw and I had to use mirror website for docker. And this is probably not a VM internet connection problem since I can use firefox freely. (But not google though) Do I need a vpn connection for the VM?

Thank you,
Dahai Wen