UFW ubuntu fire wall

[Stevyn]

UFW ubuntu fire wall

Show firewall status including your rules:

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sudo ufw status numbered

delete rule number # 4:

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sudo ufw delete 4

block specific IP address:

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sudo ufw insert 1 deny from 178.137.80.191 comment 'block spammer'

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sudo ufw insert 1 deny from 202.54.1.0/24 comment 'Block DoS attack subnet'

reload :

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sudo ufw reload

To allow incoming SSH connections from a specific IP address or subnet, specify the source. For example, if you want to allow the entire 15.15.15.0/24 subnet, run this command:

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sudo ufw allow from 15.15.15.0/24  to any port 22