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← Revision 15 as of 2023-04-08 13:25:45 ⇥
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| = UFW = | = Ufw = |
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| '''Uncomplicated Firewall''' ('''UFW''') is a simple-to-use but powerful firewall management software. It is a wrapper around '''iptables''', automatically writing rules for it. | '''`ufw(8)`''' ('''U'''ncomplicated '''F'''ire'''w'''all) is a firewall management program. It is a wrapper around `iptables(8)`. <<TableOfContents>> ---- |
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| == Basic Setup == | |
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| This is more than sufficient for servers that are not meant to be web-facing. | == Installation == Several [[Linux]] distributions offer a `ufw` package. Then [[Linux/Systemd|start and enable]] ufw.service. ---- == Configuration == A basic rule set is: |
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ufw allow ssh |
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| If using custom ports, adjust as needed. This would be set in `/etc/ssh/sshd_config`. | `ufw(8)` is distributed with '''app profiles''' that simplify the configuration process. Instead of allowing ''ports'', consider allowing ''apps''. {{{ ufw allow ssh }}} |
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| == HTTP == | |
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| Regardless of `httpd` flavor (Apache, NGINX, lighttpd, etc), this basic configuration should suffice. First the unencrypted port, then the encrypted port. | === Web Servers === The following rules should allow any web server to operate. |
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| ufw allow 80 | |
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| ufw allow 443 | |
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| If using custom ports, adjust as needed. | Additional steps may be required if using [[Encryption/Certbot|certbot]] on a custom port. |
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| == FTP == | |
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| First the unencrypted port, then the encrypted (FTPS, '''not''' SFTP) port. | === FTP === |
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| Passive configuration also utilizes a pool of ports. This is an example--'''''not''''' recommended--configuration for `vsftpd`. | Passive configuration also utilizes a pool of ports. Recommended to use custom ports, so adjust as needed. |
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| Recommended to use custom ports, so adjust as needed. | ---- == See also == [[https://man.archlinux.org/man/ufw.8|ufw(8)]] |
Ufw
ufw(8) (Uncomplicated Firewall) is a firewall management program. It is a wrapper around iptables(8).
Contents
Installation
Several Linux distributions offer a ufw package. Then start and enable ufw.service.
Configuration
A basic rule set is:
ufw default deny incoming ufw default allow outgoing ufw allow 22
ufw(8) is distributed with app profiles that simplify the configuration process. Instead of allowing ports, consider allowing apps.
ufw allow ssh
Web Servers
The following rules should allow any web server to operate.
ufw allow http ufw allow https
Additional steps may be required if using certbot on a custom port.
FTP
ufw allow 20/tcp ufw allow 21/tcp ufw allow 989/tcp ufw allow 990/tcp
Passive configuration also utilizes a pool of ports. Recommended to use custom ports, so adjust as needed.
ufw allow 40000:42000/tcp