ho cercato nella rete e ho trovato un bel tool kiamato true ping...

tping maya.ngi.it

Pinging maya.ngi.it [194.185.88.3] with 32 bytes of data:

Reply from 194.185.88.3: bytes=32 time 15.87 ms (20 ms), TTL=249, Hop=6
Reply from 194.185.88.3: bytes=32 time 14.87 ms (10 ms), TTL=249, Hop=6
Reply from 194.185.88.3: bytes=32 time 14.34 ms (20 ms), TTL=249, Hop=6
Reply from 194.185.88.3: bytes=32 time 15.95 ms (10 ms), TTL=249, Hop=6
Reply from 194.185.88.3: bytes=32 time 14.77 ms (20 ms), TTL=249, Hop=6

Ping statistics for 194.185.88.3
Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 14.34ms, Maximum = 15.95ms, Average = 15.16ms


TCP options string = 020405b401010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.

Default Receive Window (RWIN) = 64240
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 64240

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
bandwidth * delay product:

Your RcvWindow limits you to: 2569.6 kbps (321.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1027.84 kbps (128.48 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 116 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000

Vanno bene questi valori...???

p.s.Scarico sui 100Kbps e invio sui 33Kbps.