Description of problem: Check iptables config and alert/modify to users if there are any incompatible configs before proceeding to installation to help users to know the risks and mitigate them properly. Context - BZ 2152986 We configured a cluster using cephadm and after sometime one of the node had to be rebooted. which caused iptales services to be restarted. >> -A INPUT -j REJECT --reject-with icmp-host-prohibited above rule in /etc/sysconfig/iptables caused OSDs to go down. This RFE is to track enhancement to cephadm/cephadm-ansible to check ipconfigs *which are not compatible to run ceph cluster* and warn/modify about iptable config and help users to have cluster running seamless. Version-Release number of selected component (if applicable): <latest> Expected results: cephadm to check iptables and its config and warn/modify users about possible implications about incompatible rules to the users before cluster configuration. Additional info: BZ 2152986 has more details about the implications of one of the incompatible rule and https://bugzilla.redhat.com/show_bug.cgi?id=2152986#c22 has related conversation. HAve filed BZ 2154752 to cover this from documentation until we have it implemented by cephadm/cephadm-ansible.