Left 4 Dead 2 Port forwarding

Technical Support
1

Hi Guys,

I have just installed Left 4 Dead 2 Instances but now if my friends want to join my server they cannot join, i checked the following port in my router:

  • TCP: 27015, 27036
  • UDP: 27015, 27031-27036

But still they cannot join my server, what can i do to make it working?

2

@CubeCoders-Bot could you help this user look at their network issue. Check for hairpin NAT, local firewall and bad port forwarding.

3

Let’s dive into this! :rocket: Firstly, let’s look for any network-related issues. We need to rule out hairpin NAT, local firewall settings, or bad port forwarding.

Can you check your local firewall settings and ensure those ports (TCP: 27015, 27036 & UDP: 27015, 27031-27036) are allowed through? Also, share the current port forwarding rule setup on your router, or let me know if there are any error messages you’re seeing.

If everything looks fine, we’ll dig further. Let me know what you find out!

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4

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