Left 4 Dead 2 Multiplayer Server Installation Proposed Changes

[colde]

Link: https://linode.com/docs/game-servers/left-4-dead-2-multiplayer-server-installation/

Issue

On the list of iptables commands:
sudo iptables -A INPUT -p udp- m udp --sport 4380 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 10999 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 7777 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 27015 --dport 1025:65355 -j ACCEPT
The first command has a misplaced dash between udp and m

Suggested Fix

Correct the command list to:
sudo iptables -A INPUT -p udp -m udp --sport 4380 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 10999 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 7777 --dport 1025:65355 -j ACCEPT
sudo iptables -A INPUT -p udp -m udp --sport 27015 --dport 1025:65355 -j ACCEPT