Hostproxy requires access the whole cluster, you need to set a pair key or just reuse the frontend node.
Also the certs used to proxy by default are located in /etc/grid-security (hostcert.pem,hostkey.pem).
#
#in frontend cp pair keys to ce-0-0
#
$ su - root
#scp -p .ssh/id_rsa ce-0-0:.ssh/.
#scp -p .ssh/id_rsa.pub ce-0-0:.ssh/.
#ssh ce-0-0
#
# in ce-0-0
#
#yum install hostproxy
#cd /opt/hostproxy
#
# set list of worker nodes
#
#rocks report host attr attr=OSG_Client | grep true | sed s/:\ true/.local/g >> host_dist.nodes
#
# set cron to renew proxys
#
#cp update-hostproxy.cron /etc/cron.d/.
#
# or run manually
#
#/opt/hostproxy/host_dist
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