Hi, I’m trying to access CEPH cluster from client machines via RBD for operations like listing pools, creating image, etc.. I put all needed keys/configuration in ceph directory and when I try to list pool rbd hung/wait forever Client machine in IP range of: 136.172.26.0/24 The command e.g. I’m trying is rbd -c /etc/ceph/ceph.conf -p vms ls -n client.cinder4 My CEPH cluster configuration file “ceph.conf” is ########## [global] fsid = e6d92380-4d77-4064-8797-2722fecfd1f4 mon initial members = ceph1,ceph2,ceph3 mon host = 10.60.1.21,10.60.1.22,10.60.1.23 public network = 10.60.1.0/24 auth cluster required = cephx auth service required = cephx auth client required = cephx mon_allow_pool_delete = true osd pool default size = 3 osd pool default min size = 2 [mgr.ceph1] mgr tick period = 10 mon mgr beacon grace = 60 [client.cinder4] keyring = /etc/ceph/ceph.client.cinder4.keyring ########## There is no firewall in between and accessing/telnet port is very much possible. I’m suspecting because of different IP subnet, MON CEPH is not allowing client. Any idea and help on this will be great. Thanks Amjad