TCP options string = 020405ac010303000101080a000000000000000001010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising MTU to 1500 for maximum throughput.

Default Receive Window (RWIN) = 32767
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 32767

For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
511104 (MSS x 44 * scale factor of 8)
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)
bandwidth * delay product:

Your RcvWindow limits you to: 1310.68 kbps (163.835 KBytes/s) @ 200ms
Your RcvWindow limits you to: 524.272 kbps (65.534 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 122 hops

TTL value is ok.
Timestamps (RFC1323) =
Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000
Sono giusti per un'ADSL 640/256 o devo modificarli? E se si quali sono i valori consigliati?
Grazie
Ciao