RedHat 7.2: How to configure non standard port for ssh

Redhat don't allow non-standard port to be used by a service, follow below procedure to configure this and other parameters to bring it into network. SElinux refers to Security Enhanced Linux, this needs to be disabled.

Turn off selinux  (it’s not configured for docker or sshd on 2222)

set enforce 0

sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

Turn off firewalld (docker listens on many and random ports)

service firewalld stop && chkconfig firewalld off

Fix sshd to reenable port 2222 for sshd (as per standards)

# add 2222 to /etc/ssh/sshd_config

service sshd reload

Install basic tools

mkdir /media/cdrom

mount /dev/cdrom /media/cdrom

rpm -ivh /media/cdrom/Packages/net-tools-2.0-0.17.20131004git.el7.x86_64.rpm

rpm -ivh /media/cdrom/Packages/bind-utils-9.9.4-29.el7.x86_64.rpm /media/cdrom/Packages/bind-libs-9.9.4-29.el7.x86_64.rpm

rpm -ivh /media/cdrom/Packages/lsof-4.87-4.el7.x86_64.rpm

Fix /etc/resolv.conf so DNS works:

cat > /etc/resolv.conf << EOF

search unix.anz

nameserver 10.XX.XX.XX

nameserver 10.XY.XX.XX

EOF

Fix default route:

route add default gw XX.XX.XX..254

# both of above are already in /etc/sysconfig/network-scripts/ifcfg-ens192 but not active probably network restart would work, but good chance of failing and locking me out, so applied manually

Fix timezone

ln -sf /usr/share/zoneinfo/Country/City /etc/localtime

Install dependencies for docker:  (yum not configured)

cd /media/cdrom/Packages/

rpm -ivh policycoreutils-python-2.2.5-20.el7.x86_64.rpm audit-libs-python-2.4.1-5.el7.x86_64.rpm checkpolicy-2.1.12-6.el7.x86_64.rpm python-IPy-0.75-6.el7.noarch.rpm libsemanage-python-2.1.10-18.el7.x86_64.rpm libcgroup-0.41-8.el7.x86_64.rpm setools-libs-3.3.7-46.el7.x86_64.rpm