Thx for the help...
Van Bauren look, this is the test before the changes in cablenut.
:::.. Download Stats ..:::
Connection is:: 524 Kbps about 0.5 Mbps (tested with 1496 KB)
Download Speed is:: 64 KB/s
Tested From:: http://www.testmy.net/
Test Time:: Thu Mar 10 17:53:14 UTC-0300 2005
Bottom Line:: 9X faster than 56K 1MB download in 16 sec
Diagnosis: Awesome! 20% + : 54.57 % faster than the average for host (com.br)
Validation Link:: https://testmy.net/stats/id-N2H5D839P
:::.. Upload Stats ..:::
Connection is:: 559 Kbps about 0.6 Mbps (tested with 1496 KB)
Upload Speed is:: 68 KB/s
Tested From:: http://www.testmy.net/
Test Time:: Thu Mar 10 17:54:47 UTC-0300 2005
Bottom Line:: 10X faster than 56K 1MB upload in 15.06 sec
Diagnosis: Awesome! 20% + : 219.43 % faster than the average for host (com.br)
Validation Link:: https://testmy.net/stats/id-VW481JRIC
Is that good or can be better? My internet: cable 600/600
TCP options string = 020405b40103030101010402
MTU = 1500
MTU is fully optimized for broadband.
MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.
Default Receive Window (RWIN) = 76800
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled Receive Window = 38400
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be, which can affect your connection to some servers. Also, RWIN being close above 65535 does not justify the header overhead of scaling. You might want to use one of our recommended RWIN values below.
For optimum performance, consider changing RWIN to a multiple of MSS.
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):
Your RcvWindow limits you to: 3072 kbps (384 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1228.8 kbps (153.6 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 50 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 11110000
Precedence (priority) = 000 (routine)
Delay = 0 (normal delay)
Throughput = 1 (high throughput)
Reliability = 1 (high reliability)
Cost = 1 (low cost)