Ho da poco ricevuto l'upgrade da Libero a 1.2 mbts e ho seguito passo passo la guida per l'ottimizzazione ma i valori di MTU e MSS non son riuscito a variarli.
Ho XP con SP2 e un router ethernet.

Qualche consiglio/dritta per cortesia?

TCP options string = 0204059801010402
MTU = 1472
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
MSS = 1432
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.
Default Receive Window (RWIN) = 63008
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 63008

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
504064 (MSS x 44 * scale factor of 8)
252032 (MSS x 44 * scale factor of 4)
126016 (MSS x 44 * scale factor of 2)
bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 2520.32 kbps (315.04 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1008.128 kbps (126.016 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 122 hops

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