Uncomplicated Firewall: Difference between revisions
(Basic configuration section) |
(Diskless mode) |
||
| Line 24: | Line 24: | ||
Check the status of UFW: | Check the status of UFW: | ||
{{cmd|ufw status}} | {{cmd|ufw status}} | ||
== Diskless mode == | |||
If you have installed Alpine Linux as [[Installation#Installation_Handbook|diskless]] then you need to use [[Alpine local backup|Alpine Local Backup (lbu)]] to save your UFW configuration. UFW data is stored in <code>/usr/lib/ufw</code>, therefore use the following commands to save the UFW configuration: | |||
{{cmd|lbu add /usr/lib/ufw | |||
lbu commit}} | |||
[[Category:Networking]] | |||
[[Category:Security]] | |||
Revision as of 17:08, 1 October 2015
UFW stands for Uncomplicated Firewall, and is a program for managing a netfilter firewall. It provides a command line interface and aims to be uncomplicated and easy to use.
Installation
UFW can be found in the testing repository. Read Alpine_Linux_package_management#Repository_pinning to enable the testing repository.
Once the testing repository has been enabled, UFW can be installed by issuing the following command:
apk add ip6tables ufw@testing
Basic configuration
The following is a simple configuration that will deny all incoming and outgoing data communication by default and allow incoming SSH, outgoing DNS and NTP traffic:
ufw default deny incoming ufw default deny outgoing ufw limit SSH # open SSH port and protect against brute-force login attacks ufw allow out DNS # allow outgoing DNS ufw allout out 123 # allow outgoing NTP
The following lines are only needed the first time you install the package:
ufw enable rc-update add ufw # add UFW init scripts
Check the status of UFW:
ufw status
Diskless mode
If you have installed Alpine Linux as diskless then you need to use Alpine Local Backup (lbu) to save your UFW configuration. UFW data is stored in /usr/lib/ufw, therefore use the following commands to save the UFW configuration:
lbu add /usr/lib/ufw lbu commit