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We have all been on a server just minding our business and been randomly kicked. And unless you were actually hacking, this is due to the server having too strict security parameters. We all hate hackers and no one wants to make their lives any easier by reducing our server security. However, where is the balance how does one prevent hackers and also allow normal players the option to play kick free. Usually, not always, a player is kicked due to a signature mismatch. I will go over several things regarding signatures and how to ensure your players aren't being randomly kicked. First, let's talk about Keys and BISIGN files. I am not going to go over the exact details with either of these and how they function. What I will go over is how to keep your server up to date. What most owners do when they update a mod for a server is they forget to update the key or BISIGN files. Ensure that if one of your server mods are updated you don't forget to update the key as well. BISIGN files are in the same folder as the pbo for that mod. Most mods are signed and if they have a BISIGN then they also have a key. Second, and more why I wrote this, is your server.cfg settings. In most cases server owners take the standard server.cfg that came with the server and simply add their own lines to it. There is nothing wrong with doing this, however, some settings may need to be adjusted specifically the "verifySignatures" settings. I will list a link below to Bohemia's server.cfg page that explains all the variables. Below are security settings that I recommend: The key command in this list is the "onDifferentData" most servers come this this listed as "onDifferentData = kick (_select 0)";. This will more often than not kick players that have not done anything to their files. Check the "onDifferentData" link below for an explanation. onDifferentData Server.cfg (Bohemia)