Hi,

In this article, we’ll show you how to Block/Unblock IP Addresses in SSH. You can also Block/Unblock IP Addresses from WHM root for which we have already written an article. But, using SSH to ban/unban IP Addresses is more effective and less time-consuming because you don’t have to browse through the WHM interface in SSH.

Let’s do this.

Block An IP Address from SSH

Well, this can easily be done with a single-line command. Follow the below steps to Block/Unblock IP Addresses.

• First of all, log into your SSH as a root.

• Enter the below command.

/scripts/cphulkdblacklist 180.156.169.4

Note: Replace the dummy IP Address with the IP Address you want to blacklist.

• If the cphulkd is enabled, the command will execute. Else, you’ll receive the following error.

[root@test ~]# /scripts/cphulkdblacklist 180.156.169.4
cphulkd is not enabled

• If you see the above error, you’ll have to enable cphulkd from the WHM root. Let’s enable it.

Enable cPHulk Protection from WHM 

• Log into WHM as a root user.
• Either navigate to the Security Center > cPHulk Brute Force Protection or simply type cPHulk in the search bar and click on the result.

• Hit the Off button to enable cPHulk Brute Force Protection and then switch back to the SSH.

• Once cPHulk is enabled, move back to the SSH and run the previous command again.
• You’ll receive the following result.

[root@test ~]# /scripts/cphulkdblacklist 180.156.169.4
180.156.169.4 has been blacklisted

That’s It.

You’ve successfully blocked an IP Address from SSH.

That’s how you can easily Block/Ban IP Addresses from SSH. Now let’s unblock the IP Address.

Unblock An IP Address from SSH

• Again, log into the SSH as a root user.
• Run the below command and hit enter.

/scripts/cphulkdwhitelist 180.156.169.4

Note: Do not forget to change the dummy IP Address with the IP Address you want to unblock/unban.

• Once you’ll hit the command, you’ll see the below result.

[root@test ~]# /scripts/cphulkdwhitelist 180.156.169.4
180.156.169.4 has been whitelisted

That’s It.

You’ve Successfully unblocked an IP Address using SSH.

Now you know how to Block or Unblock IP Addresses from SSH root. I hope this helps you. If not, you can open a free support ticket from Redserverhost.com. Our experienced Technical Support Team will be happy to assist you.

Also See:  Generate SSH Keys in Windows & MacOS

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