My game doesn't work under RouterOS

RouterOS General
1

I have been pulling my hair out of this one. There is a game called Smite I used to play about 6 months back. About that time I got a RouterBOARD 2011UiAS. Since then I couldn’t play the game at all, but everything else was working. At the time I thought it was a bug with Smite as it was still in beta. Since the game was “ok” I didn’t really bother with it.

Take 6 months down the line and I had just installed pfSense at a customer’s location and on a whim I try the game again. After patching it works. Confused I used a crap backup linksys router and it still works. I use a rb750 I carry around with me and it doesn’t work. So now I am confused.

For the sake of argument, lets asume its the router. I have done the whole reinstall of the game and support’s answer was “use another router”. Even if I don’t play the game again, its driving me crazy on why a default installation of pfSense or a linksys works fine, but a very basic RouterOS settings blocks it.

Here is the Firewall filter and ip setup, as I said, basic.

/ip firewall nat
add action=masquerade chain=srcnat comment="Added by webbox" out-interface=WAN0 src-address=192.168.8.0/24
/ip firewall filter
add chain=input comment="General Rules" connection-state=established
add chain=input connection-state=related
add action=drop chain=input connection-state=invalid
add chain=input in-interface=LAN0
add action=drop chain=input
add chain=forward connection-state=established
add chain=forward connection-state=related
add action=drop chain=forward connection-state=invalid
add chain=forward in-interface=LAN0
add action=drop chain=forward

Any ideas? The RB750 I was using doesn’t do anything else. I just use it for when I have to use a router on the road.

2

I would suggest not to troubleshoot a game in general but rather to troubleshoot the way game communicates.

So, here are the steps I would take:

  1. Read the manual of the game to see what are its network requirements.
  2. Run Wireshark or similar software and determine what’s the difference in traffic when your game works and when it doesn’t.
  3. Determine what is the difference and then look how you can make it happen with RouterOS.

I do have one wild guess though - it may be related to UPNP. So try turning it on and disabling all your forwarding rules (Mikrotik’s implementation of UPNP will do the NAT forwarding but won’t open that port in the firewall). If this works, then I can post a script that will open UPNP ports in the firewall (or there may be one somewhere already).

3

I do not know the game, but are there any connections setup from outside.
If so, create a NAT rule and an allowance rule in firewall filter.
Could be that the ‘cheap’ linksys is using uPnP, which makes it more plausible to work out of the box.

4

Hi,
so have you found the solution to fix Game access?

5

First, what happens if you set all rules to accept and don’t drop anything? Does the game run?

If it does, add logging to the firewall rules before you drop packets and check which packets of the game you drop.

6

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