Vulnerability scanning software may flag "Hidden RPC Services Vulnerability" on Citrix App layering ELM Appliance
Running the following command would disable the NFS Server functionality of the Citrix App layering ELM:
systemctl stop nfs-server rpcbind
systemctl disable nfs-server rpcbind
firewall-cmd --permanent --remove-service=nfs
firewall-cmd --reload
Security vulnerability report is related to the NFS Server functionality of ELM. This functionality is enabled by default in ELM. It can be disabled without affecting the ELM's core functionality.