Steam Game Server Ports, Autostart, and Update Script

Steam Game Server Ports
These are mostly for steam to communicate with other services when the server is running.  (Ex. Friends, Group Servers [ l4d2 ], etc.) Additional rules may need to be added if running multiple servers on one dedicated server (ex. 27016, 27017, etc [what ever port a particular server is running on] ).

iptables -N SteamServers
iptables -I INPUT -j SteamServers
iptables -A SteamServers -p tcp -m tcp –dport 25565 -j ACCEPT
iptables -A SteamServers -p udp -m udp –dport 27000:27014 -j ACCEPT
iptables -A SteamServers -p tcp -m tcp –dport 27000:27014 -j ACCEPT
iptables -A SteamServers -p tcp -m tcp –dport 27016 -j ACCEPT
iptables -A SteamServers -p tcp -m tcp –dport 27030:27039 -j ACCEPT
iptables -A SteamServers -p udp -m udp –dport 27020 -j ACCEPT
iptables -A SteamServers -p udp -m udp –dport 27000:27015 -j ACCEPT
iptables -A SteamServers -p udp -m udp –dport 27015 -j ACCEPT
iptables -A SteamServers -p tcp -m tcp –dport 27015 -j ACCEPT
service iptables save

Unfortunately most of the below is out-dated as valve has switched to SteamCMD.
Custom Script (Update.sh)
Script I use for updating all servers in a row (run and let it go). This information will eventually change as Valve is planning on moving away from HLDSUpdateTool and moving towards using SteamCMD for game server management.

#!/bin/bash
clear
echo -e "\nUpdating all HLDS Servers\n"
./steam -command update -game "Counter-Strike Source" -dir folder-name
./steam -command update -game "Counter-Strike Source" -dir folder-name
./steam -command update -game "Counter-Strike Source" -dir folder-name
echo -e "Done\nDone\nDone\n\n"

Custom Script (# /etc/rc3.d/S99gameservers)
Script created for starting game servers when the server boots up. The /bin/su - <USER> runs the server under the specified user instead of running the servers as the root user. This also keeps things organized and secure among other things.:

#!/bin/bash
echo -e "Starting CSS Servers"
/bin/su - USER -c /path/to/startscript
/bin/su - USER -c /path/to/startscript
/bin/su - USER -c /path/to/startscript
/bin/su - USER -c /path/to/startscript
/bin/su - USER -c /path/to/startscript
echo "Done!"

Popular Script / Customized (start-game.sh)
Server Startup Script Example. The "export RDTSC_FREQUENCY=2660.000000" line sets the server speed identical to the CPU and gives the server a quicker start.:

#!/bin/bash
clear
sleep 2
echo -e "\nStarting Server\n"
export RDTSC_FREQUENCY=2660.000000
screen -A -m -d -S SCREEN-NAME /absolute/path/to/srcds_run -console -game cstrike +map aim_ag_texture2 +maxplayers 14 +fps_max 2000 -autoupdate +ip  +port  -debug +autoupdate
echo -e "Server Started\n\n"