Restrict SSH access to the source and prohibit access to addresses that are outside of 4A

"Fuel Node"

In the/etc/hosts.allow file
Add to:
Sshd:10.129.0.1:allow
Sshd:10.129.0.2:allow
Sshd:10.129.0.3:allow
Sshd:10.129.3.1:allow
Sshd:10.129.3.2:allow
Sshd:10.129.3.3:allow

In the/etc/hosts.deny file
Add to:
Sshd:all

Last sshd restart
Service sshd Restart

"Control Node"

In the/etc/hosts.allow file
Add to:
Sshd:10.129.0.1:allow
Sshd:10.129.0.2:allow
Sshd:10.129.0.3:allow
Sshd:10.129.3.1:allow
Sshd:10.129.3.2:allow
Sshd:10.129.3.3:allow
Sshd:10.254.1.1:allow

In the/etc/hosts.deny file
Add to:
Sshd:all

Last sshd restart
Service sshd Restart

"Compute Node"

In the/etc/hosts.allow file
Add to:
Sshd:10.129.0.1:allow
Sshd:10.129.0.2:allow
Sshd:10.129.0.3:allow
Sshd:10.129.3.1:allow
Sshd:10.129.3.2:allow
Sshd:10.129.3.3:allow
Sshd:10.254.1.1:allow
Sshd:10.254.1.15:allow
Sshd:10.254.1.30:allow
Sshd:10.254.1.45:allow

In the/etc/hosts.deny file
Add to:
Sshd:all

Last sshd restart
Service sshd Restart

Where the compute node can use the following script:

#! /bin/bash
Line= ' grep ^10 ~/hosts|wc-l '
For i in ' seq $line '
Do
Des= ' grep ^10 hosts|sed-n ${i}p '
SSH $des ' echo ' sshd:10.129.0.1:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.129.0.2:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.129.0.3:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.129.3.1:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.129.3.2:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.129.3.3:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.254.1.1:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.254.1.15:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.254.1.30:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:10.254.1.45:allow ' >>/etc/hosts.allow '
SSH $des ' echo ' sshd:all ' >>/etc/hosts.deny '
SSH $des ' service sshd restart '

echo $des >> Ip.log
Done
if [$i = = $line];then
Echo ' Deploy success '
Else
Echo ' Deploy failed '
Fi

Restrict SSH access to the source and prohibit access to addresses that are outside of 4A