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I have a FRITZ!Box 7590 and I opened some ports for GTA online for two computers as adviced by rockstar games.

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But if I check the port online, then it says it is closed.

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I have GTA online running in the background with an open online session.

How can I even play the game online with these necessary ports closed?

Notes:

  • ArcherC6 is an access point connected to the fritz.box, which I use as a repeater and switch. -- Both computers (BLUEBEAM--Gast and Black) are connected with it.
  • I've also added a TCP port 7800 for testing. It says closed as well.
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2 Answers 2

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It could that tool is blocked in the network of your ISP, or that your ISP blocks port checking. There are enterprise/telco carrier firewalls who can block that and most consumer grade ISPs have that in place as a security measure for their customers.

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In the very simplest terms, ports are not 'the same' both ways. Inbound & outbound are handled very differently, for security.

You should be able to see out, but you don't want other people being able to see in. Ports for a local service connecting outwards shouldn't need specifically opening, or any specific firewall rules, they should just open automatically for you as you launch the app & connect.

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  • Ok, I tried to open the ports, because rockstar instructed me to open them. support.rockstargames.com/articles/200525767/…
    – Black
    Dec 25, 2023 at 15:50
  • They don't need to be open both ways. The game itself will open outbound ports as necessary, on any regular domestic router. The inbound ports should stay closed [or even stealthed, so they don't appear in a portscan at all.] I can't read the German in your question, so idk what that's telling you.
    – Tetsujin
    Dec 25, 2023 at 17:34

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