2016-01-01 15:31:10 +00:00
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# ufw
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> Uncomplicated Firewall.
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> Frontend for iptables aiming to make configuration of a firewall easier.
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2021-06-25 05:43:37 +01:00
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> More information: <https://wiki.ubuntu.com/UncomplicatedFirewall>.
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2016-01-01 15:31:10 +00:00
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- Enable ufw:
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`ufw enable`
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- Disable ufw:
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`ufw disable`
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2016-08-28 10:51:54 +01:00
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- Show ufw rules, along with their numbers:
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2016-05-17 12:31:03 +01:00
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2016-08-28 10:51:54 +01:00
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`ufw status numbered`
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2016-05-17 12:31:03 +01:00
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2017-10-06 15:37:07 +01:00
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- Allow incoming traffic on port 5432 on this host with a comment identifying the service:
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2016-01-01 15:31:10 +00:00
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2020-10-04 18:33:38 +01:00
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`ufw allow {{5432}} comment "{{Service}}"`
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2016-01-01 15:31:10 +00:00
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2016-08-28 10:51:54 +01:00
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- Allow only TCP traffic from 192.168.0.4 to any address on this host, on port 22:
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2016-01-01 15:31:10 +00:00
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2016-09-01 06:20:48 +01:00
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`ufw allow proto {{tcp}} from {{192.168.0.4}} to {{any}} port {{22}}`
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2016-01-01 15:31:10 +00:00
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2016-08-28 10:51:54 +01:00
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- Deny traffic on port 80 on this host:
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2016-01-01 15:31:10 +00:00
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2016-08-28 10:51:54 +01:00
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`ufw deny {{80}}`
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- Deny all UDP traffic to port 22:
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2016-09-01 06:20:48 +01:00
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`ufw deny proto {{udp}} from {{any}} to {{any}} port {{22}}`
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2016-08-28 10:51:54 +01:00
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2016-09-01 11:32:55 +01:00
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- Delete a particular rule. The rule number can be retrieved from the `ufw status numbered` command:
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2016-08-28 10:51:54 +01:00
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`ufw delete {{rule_number}}`
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