Accessing CMSSW CVS repo from outside Cern

export CVSROOT=:ext:argiro@cmscvs.cern.ch:/cvs_server/repositories/CMSSW
export CVS_RSH=ssh

The system will ask for your AFS password very often. To avoid this see

http://cvs.web.cern.ch/cvs/howto.php#accessing-sshlinux (puff, pant)

alternalively use fsh ( I have not tested it at Cern)
http://www.lysator.liu.se/fsh/