Greetings,

To fix your connection issue please try the following:

• Ensure you have the latest version of Java installed on your machine.

• Ensure your firewall is turned off completely

• Ensure your network is using ports 8888 and 8889

• Lastly please contact your internet service provider ‘ISP’ and ask them to provide you with a new IP address


Once you have done this please launch the game client and you should find this issue will be resolved.


If for any reason the above hasn't fixed you issue please try the following fix:


Find your MTU:


Open up your command prompt as an Administrator. To do this please type cmd into the window search bar right click on it and select 'Run s Administrator'. Once opened please put the following into it:


• netsh interface ipv4 show subinterfaces


You are looking for the value under the heading "MTU" which by default will most likely be 1500.

From here you need to adjust this value down by 10 until you get a solid and stable connection to BDO.


To do this please put the the following into your command prompt making sure to change 'mtu=1500' down by 10 and press enter to set thie value:


• If you have a connection via a cable: netsh interface ipv4 set subinterface "Local Area Connection" mtu=1490 store=persistent

• If you are using a Wireless connection: netsh interface ipv4 set subinterface "Wireless Network Connection" mtu=1490 store=persistent


Please repeat this final step until you can connect to, open and play BDO with no connection issues. You may need to go as low as mtu=1000 to get a stable connection.

What this will do is it will slow down you upload / receive speeds which in turn will create a more stable connection.

If this works for BDO and you have trouble playing other games you can simply reverse the process to increase your MTU to suit your other games.

We are aware that many users are experiencing the same issue as you are and our network team are working very hard to get this issue resolved on a long term bases.

Please bare with us and please accept my sincerest apologies on behalf of the BDO team for the inconvenience you have had.

Kind regards,
GM Tomganks English Customer Support Team

Our knowledge base is regularly updated with current issues. It will
answer some of the most common questions and save you having to wait for
a response from a Games Master.

You can access the knowledge base by following the link below.
https://blackdesert.zendesk.com/hc/en-us

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