UFW and Startup

linux.md

@@ -1,5 +1,11 @@
 # Linux Cheats
 
+## Set script as startup
+If, for some reason, apache isn't startup:
+
+> `sudo update-rc.d apache2 defaults`
+
+
 ## Arduino
 Find what 'channel'(?) the Arduino is plugged in at:
 `dmesg | grep tty`
@@ -26,3 +32,21 @@ Create groups
 
 Add user to a group
 > `usermod -a -G <group> <user>`
+
+## Open ports with iptables
+
+Don't do that. Use [UFW](https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-with-ufw-on-debian-10) instead.
+
+Allow a connection with UFW:
+> `sudo ufw allow <port/service>`
+
+Enable ufw service:
+
+> `sudo ufw enable`
+
+
+
+> [Source](https://www.linuxquestions.org/questions/linux-security-4/how-to-open-ports-with-iptables-237939/)
+>
+> [Source2](https://www.digitalocean.com/community/tutorials/iptables-essentials-common-firewall-rules-and-commands)
+