Managing SSH Access

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Managing SSH Access

In this lab, we will restrict SSH access to specific user accounts from specific sources. This will allow us to granularly control SSH access to a host. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Intermediate

Last updated

Aug 26, 2025

Duration

30m

Challenge

Allow Susan SSH access from host susan-ws.office21.net
1. Edit the /etc/ssh/sshd_config file with the following line:
```
sudo vi /etc/ssh/sshd_config
```
- enter password for cloud_user
```
AllowUsers [email protected]  
```
Challenge

Permit root SSH login from the subnet 10.0.1.0/24
1. The first step is to permit root logins by removing the comment in front of the line #PermitRootLogin yes in the /etc/ssh/sshd_conf file.
2. Secondly, we need to add [email protected]/24 to the AllowUsers line in the /etc/ssh/sshd_config file.
3. Now we need to restart the sshd service so the changes we made will take affect:
```
systemctl restart sshd  
```

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