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1.8 KiB
1.8 KiB
| Alias | Tag | Date | DocType | Hierarchy | TimeStamp | location | CollapseMetaTable | |||||
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2021-10-04 | Personal | NonRoot |
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Parent:: Selfhosting, Server Alias, Server Cloud, Server Tools
name Save
type command
action Save current file
id Save
^button-UFWSave
Configuration of UFW
title: Summary
collapse: open
Description of basic commands for UFW
style: number
Installation and activation
UFW should be installed by default in Ubuntu servers. If not, see below.
Installation of UFW
sudo apt install ufw
Activation of UFW
sudo ufw status
If disabled:
sudo ufw enable
Basic commands
UFW rules status
'sudo ufw status'
Commands can be appended:
verbose: details incoming/outgoing rulesnumbered: display rule numbers
UFW rule management
Allow / Deny
sudo ufw allow/deny
Then:
| Type to allow | Syntax |
|---|---|
| IP | from (ip address/range) |
| Port | (portnumber)/(protocol) |
| Service | (service name) |
| Protocol | proto (protocol name) |
Rule priority
Certain rules like IP denial need to be put on top of the rule stack as UFW reads rules in order one after another. Insert the following in the command to force insertion:
insert 1 (or any place in the pecking order)
Complex rule syntax
Finer rules can be defined with the following syntax.
| rule condition | syntax |
|---|---|
| connecting IP | from (ip or any) |
| internal IP | to (ip or any) |
| protocol | proto (protocol or any) |
| port | port (port or any) |
| outgoing traffic | out |