#include <a_samp>

public OnPlayerConnect(playerid)
{
    if((GetTickCount()-GetPVarInt(playerid, "ConnectionTime")) < 200 && CountIP(PlayerIP(playerid)) >= 5)
    {
        Ban(playerid);
    }
    SetPVarInt(playerid, "ConnectionTime", GetTickCount());
    return 1;
}

CountIP(ip[])
{
    new countip;

    for(new i = 0; i < GetMaxPlayers(); i++)
        if(IsPlayerConnected(i) && !strcmp(PlayerIP(i),ip))
            countip++;
    return countip;
}

PlayerIP(playerid)
{
    new ip[16];
    GetPlayerIp(playerid,ip,sizeof(ip));
    return ip;
}