private static bool MatchIPs(string requestIp, string restrictionIp)
{
var dividerIdx = restrictionIp.IndexOf('-');
if (restrictionIp.IndexOf('-') > 0)
{
var lower = IPAddress.Parse(restrictionIp.Substring(0, dividerIdx).Trim());
var upper = IPAddress.Parse(restrictionIp.Substring(dividerIdx + 1).Trim());
var range = new IPAddressRange(lower, upper);
return range.IsInRange(IPAddress.Parse(requestIp));
}
return requestIp == restrictionIp;
}