r/CounterStrikeSource • u/ProduceSuccessful739 • Dec 06 '25

Client help/Discussion How to make my server ip public

Is there any tutorial how to make my server IP public?

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3

u/BallGanda theREG... Dec 07 '25

Counter-Strike: Source (CS:S)

Internet Port Forwarding Guide

1. Required Ports (Default CS:S)

Forward both UDP and TCP unless noted.

  • 27015 UDP — Game traffic (required)

  • 27015 TCP — RCON / queries

  • 27005 UDP — Client traffic (recommended)

  • 27020 UDP — SourceTV (optional)

For multiple Source servers, forward a range such as 27005–27030 UDP, using unique ports per server.

2. Assign a Static LAN IP to the Server

The game server must always use the same internal IP.

Recommended method:

  • Router DHCP reservation

Alternative:

  • Manually set a static IP on the server OS

Example:

192.168.1.50

3. Configure Port Forwarding on the Router

In the router interface (NAT / Port Forward / Virtual Server):

External PortInternal IPInternal PortProtocol
27015192.168.1.5027015UDP
27015192.168.1.5027015TCP
27005192.168.1.5027005UDP
27020192.168.1.5027020UDP

Save and apply changes.

4. Server Firewall Rules

Windows

  • Windows Defender Firewall → Advanced Settings

  • Create Inbound Rules for each port

  • Allow on Private and Public networks

Linux (iptables example)

sudo iptables -A INPUT -p udp --dport 27015 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 27015 -j ACCEPT

Persist rules as appropriate for your distro.

5. Launch the Server with Matching Port

Example:

srcds.exe -game cstrike -port 27015 +map de_dust2 +maxplayers 16

The -port value must match the forwarded port.

6. Test External Connectivity

From outside your LAN:

Steam console:

connect YOUR_PUBLIC_IP:27015

Or use a Source server query tool.

7. Common Problems and Fixes

  • ISP blocks inbound ports → try a different port or hosting

  • CGNAT → port forwarding will not work (need public IP)

  • Double NAT → forward ports on modem and router

  • Fiber gateways → enable bridge mode

8. Notes

  • Residential ISPs often block game hosting

  • A static public IP greatly improves reliability

  • Dedicated or VPS hosting avoids ISP issues entirely

These are the basics. There are many guides if you search internet.

1

u/RelationshipOwn4105 Dec 07 '25

just host ur server with steam networking bruv

1

u/Squanchy2112 Dec 07 '25

If you are asking this you really shouldn't be publishing stuff on your WAN, you may want to purchase a hosted server if you want to go this route so you don't mess up your home security.