wolfgang@wsrcc.com said:
> One problem is that your netbsd box's window is closing.  You really
> should make the window at least 64k (or more if window scaling is
> available). 

Thanks - the "sendspace" made it. I've set it to 64k, as you
suggested, and got ~15MB/s troughput.
It's still sad that that the default settings give not only
a suboptimal but an absolutely pathetic performance...

(A new `tcpdump` appended for reference.)

best regards
Matthias

22:52:38.505966 134.94.206.140.65528 > 134.94.206.130.5001: S 
659288196:65928819
6(0) win 16384 <mss 8960,nop,wscale 0,nop,nop,timestamp 1799 0>
22:52:38.506189 134.94.206.130.5001 > 134.94.206.140.65528: S 
4294966272:4294966
272(0) ack 659288197 win 35840 <mss 8960,nop,wscale 0> (DF)
22:52:38.506283 134.94.206.140.65528 > 134.94.206.130.5001: . ack 1 win 17920
22:52:38.507879 134.94.206.140.65528 > 134.94.206.130.5001: P 1:8193(8192) ack 
1
 win 17920
22:52:38.650597 134.94.206.130.5001 > 134.94.206.140.65528: . ack 8193 win 
35840
 (DF)
22:52:38.650832 134.94.206.140.65528 > 134.94.206.130.5001: . 8193:17153(8960) 
a
ck 1 win 17920
22:52:38.651116 134.94.206.140.65528 > 134.94.206.130.5001: . 17153:26113(8960)
ack 1 win 17920
22:52:38.651691 134.94.206.130.5001 > 134.94.206.140.65528: . ack 26113 win 
3507
2 (DF)
22:52:38.651901 134.94.206.140.65528 > 134.94.206.130.5001: . 26113:35073(8960)
ack 1 win 17920
22:52:38.652183 134.94.206.140.65528 > 134.94.206.130.5001: . 35073:44033(8960)
ack 1 win 17920
22:52:38.652414 134.94.206.130.5001 > 134.94.206.140.65528: . ack 35073 win 
3584
0 (DF)
22:52:38.652471 134.94.206.140.65528 > 134.94.206.130.5001: . 44033:52993(8960)
ack 1 win 17920
22:52:38.652763 134.94.206.140.65528 > 134.94.206.130.5001: . 52993:61953(8960)
ack 1 win 17920