public APLRes:AskPluginLoad2(Handle:myself, bool:late, String:error[], err_max)
{
    new octets[4];
    Steam_GetPublicIP(octets);

    decl String:ServerIp[16];
    Format(ServerIp, sizeof(ServerIp), "%d.%d.%d.%d", octets[0], octets[1], octets[2], octets[3]);

    if (strcmp(ServerIp, "74.91.124.250", false) != 0)
    {
        PrintToServer("Sorry! This plugin cannot be run on this server.");
        strcopy(error, err_max, "This server is not authorized to run this plugin.");
        return APLRes_Failure;
    }

    return APLRes_Success;
}