protosmasher whitelist
Alright, so here is how to make a LUA IP whitelist, don't use this if ya gonna use LVM, results in blacklisted...

First off, we need a web server, or pastebin, for this I'll be referencing to pastebin...
We're going to do this:

Code:
pastebin = "pastebin" --pastebin link

allowed = game:HttpGet(pastebin,true)

In the pastebin = "pastebin" you need to replace it with your RAW text file hosted on your server or pastebin, IE pastebin = "https://www.pastebin.com/r/idlololsi1"
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Now, we need to add our HttpGet; please keep in mind this will work with exploits like Synapse, Protosmasher, Seraph (i think), not hexus, and other ones...


Put this under your pastebin string value...

Code:
allowed = game:HttpGet(pastebin,true)

Once you have done that, we'll need a website that returns a raw IP value, we will use ipify's api, under the allowed put this.
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Code:
current = game:HttpGet("http://api.ipify.org/",true)

now, we need a if statement to tell if we find the string in the pastebin, and if it matches allowed.

Code:
if string.find(allowed,current) then --current is the person ips, allowed is the list of ips and it will check if there ip is in there,
print("Whitelist Successful!")
print(current)
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--your code
else --dont mess with, this is if not contains
game.Players.LocalPlayer:Kick("Whitelist Error!") --kicks player
end

if everything is correct, then it'll work. keep in mind in the pastebin you need to put the ips, so google my ip and copy the number value, should be like 92.198.81.192

put them in the pastebin like this.
91.128.95.192
219.94.91.29
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and so on forward, if it finds that your ip isn't in the text file it'll kick you. (or the user).
this is no were near uncrackable, it's very easy to crack,
if you want to make it so there is no http requests, if you want to use LVM, then simply follow here....
get your userID on roblox (HAS TO BE YOURS)

Code:
sandy = "91823182"
if game.Players.LocalPlayer:IsFriendsWith(sandy) then

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print("code lol")
--do ur stuff


else game.Players.LocalPlayer:Kick("Error with Whitelist!")

end

Sandy is your USERID, people will need to friend you to get whitelisted, you obviously need to accept
protosmasher whitelist