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A python wrapper for UFW

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# pyufw
A python wrapper for UFW (Uncomplicated FireWall), a wrapper for iptables.

## Install
pyufw is avaliable from PyPi. You can download it using pip:
```console
$ pip3 install pyufw
```
Also make sure ufw is installed. Depending on your distribution the package may be named `ufw` or `python-ufw`.

## Documentation
Your script will have to be run with root privilages. Upon importing the module the ufw security checks will start and you may see some warning messages. The following checks will commence:
  * is setuid or setgid (for non-Linux systems)
  * checks that script is owned by root
  * checks that every component in absolute path are owned by root
  * warn if script is group writable
  * warn if part of script path is group writable

```python
import pyufw as ufw
```

#### Enable the firewall
Enables the ufw firewall and enables on boot.
```python
ufw.enable()
```

#### Disable the firewall
Disables the ufw firewall and disables on boot.
```python
ufw.disable()
```

#### Reset the firewall
Returns the firewall to it's install defaults. `incoming=deny, outgoing=allow, routed=reject`  
The default rules are:
  * `allow SSH`
  * `allow to 224.0.0.251 app mDNS`
```python
ufw.reset()
```

#### Get status
Retuns a dict. Status is either `'active'` or `'inactive'`. If the firewall is active the default policies and rules list will also be included.
```python
ufw.status()
```
```python
{ 
   'status':'active',
   'default':{ 
      'incoming':'deny',
      'outgoing':'allow',
      'routed':'reject'
   },
   'rules':{ 
      1:'allow out on tun0',
      2:'allow in on tun0'
   }
}
```
```python
{
    'status': 'inactive'
}
```

#### Set defaults
Set the default policies for `incoming`, `outgoing` and `routed`. Policies to choose from are `allow`, `deny` and `reject`.
```python
ufw.default(incoming='deny', outgoing='allow', routed='reject')
```

#### Add rule
Add or Insert a rule. To insert a rule you can specify a rule number but this is optional.  
Check out `man ufw` for rule syntax.  
Returns the raw iptables rule added (incase your interested)
```python
ufw.add("allow 22")
ufw.add("allow 22", number=3)
```
```python
"allow -p all --dport 22 -j ACCEPT both"
```

#### Delete rule
Delete a rule. You can specify the rule itself, the rule number or the string `*` to delete all rules.
```python
ufw.delete("allow 22")
ufw.delete(3)
ufw.delete('*')
```

#### Get rules
Get a list of the current rules. Returns a dict with the rule numbers as the index.
```python
ufw.get_rules()
```
```python
{ 
   1:'allow out on tun0',
   2:'allow in on tun0',
   3:'allow 22'
}
```

#### Show listening
Returns an array of listening ports, applications and rules that apply.  
Array contains a series of tuples of the following structure:  
`(str transport, str listen_address, int listen_port, str application, dict rules)`
```python
ufw.show_listening()
```
```python
[
    ('tcp', '*', '22', 'openssh', {
        3: 'allow 22'
    }), 
    ('tcp', '*', '57621', 'spotify', {}), 
    ('udp', '*', '1900', 'spotify', {}), 
    ('udp', '224.0.0.251', '5353', 'chrome', {}), 
    ('udp', '224.0.0.251', '5353', 'chrome', {}), 
    ('udp', '*', '68', 'dhclient', {})
]
```

#### Set Logging
Set the ufw logging level. Choose from: `'on', 'off', 'low', 'medium', 'high', 'full'`.
Check out `man ufw` for more info on logging.
```python
ufw.set_logging('on')
```

#### Get raw iptables output
The following resources mirror the ufw cli commands and return the same unformatted string outputs. Maybe more useful for debugging.
```python
ufw.show_raw()
ufw.show_builtins()
ufw.show_before_rules()
ufw.show_user_rules()
ufw.show_logging_rules()
```

### Similar cool projects
  * https://gitlab.com/dhj/easyufw

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