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barry_62
barry_62
New Member
December 19, 2025
Solved

Minecraft Multiplayer Connection Issues Behind FortiGate Firewall

  • December 19, 2025
  • 1 reply
  • 444 views

Hi everyone,

 

I’m having an odd issue with Minecraft and FortiGate and wanted to see if anyone here has run into something similar. I read this thread https://community.fortinet.com/t5/Support-Forum/Unblock-certain-

game/m-p/390777/highlight/true and it reminded me of what I’m dealing with, but the solutions there didn’t quite fit my situation.

 

When I try to join certain Minecraft multiplayer servers (especially public ones), the connection either times out or I get disconnected after a few seconds. Singleplayer works fine, and some servers connect without any problem, which makes it confusing.

 

I checked basic settings like allowed ports and application control, and nothing obvious is being blocked. I’m wondering if FortiGate might be identifying some Minecraft traffic incorrectly or if there’s a specific profile or setting that usually causes issues with game traffic.

 

If anyone has experience running Minecraft behind FortiGate, I’d really appreciate hearing what worked for you or what I should check next.

 

Thanks in advance!

Best answer by ezhupa

Hello barry_62,

If you are the administrator of the FGT, I would suggest checking the Firewall Policy responsible for this traffic first.
If there are any sort of security profiles enabled there, I would check Security Logs for the particular security profiles e.g if you have Webfilter, check Web filter logs under Log & Report to check for any blocks.
As a test you can try to remove all security profiles and leave a simple FW policy without inspection in flow mode. 
This should resolve the issue, in case there is some sort of blocking by the FortiGate.

 

1 reply

ezhupa
Staff
ezhupaAnswer
Staff
December 19, 2025

Hello barry_62,

If you are the administrator of the FGT, I would suggest checking the Firewall Policy responsible for this traffic first.
If there are any sort of security profiles enabled there, I would check Security Logs for the particular security profiles e.g if you have Webfilter, check Web filter logs under Log & Report to check for any blocks.
As a test you can try to remove all security profiles and leave a simple FW policy without inspection in flow mode. 
This should resolve the issue, in case there is some sort of blocking by the FortiGate.

 

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