[CentOS] centos7 :: ks.cfg :: customisation of sshd

Wed Feb 17 19:48:14 UTC 2016
Adrian Sevcenco <Adrian.Sevcenco at cern.ch>

Hi! I want to change the sshd port at install for centos7 but i am not sure
if i am on the good track (and it is time expensive to make many try-outs)..
So, i would be grateful if someone with experience can spot if i have problems
with my planning.. (the actual purpose is that after installation i have access
for my ansible provisioning)

first make sure ssh is started
services --enabled=sshd,chronyd

then .. i imagine that in the %post section 
%post --interpreter=/usr/bin/bash --log=/root/ks-post.log
1. i could use sed to change the port 
sed -i 's/#Port\ 22/Port 60000/' /etc/ssh/sshd_config
2. sed -i 's/#PermitRootLogin\ yes/PermitRootLogin\ yes/' /etc/ssh/sshd_config
3. enable key access
mkdir -p /root/.ssh
chmod 700 /root/.ssh
cat << EOF >> /root/.ssh/authorized_keys
4. semanage port -a -t ssh_port_t -p tcp 60000
5. firewall-cmd --permanent --zone=public --add-port=60000/tcp
6. systemctl enable firewalld.service

did i miss anything?
Thank you!