> What NAT box is this?

Its a Linux based router doing natting. But I don't think that this a
problem resulting from routing, cause all the other boxes within my LAN,
running NetBSD and Linux don't have any problems

> What protocol do you use to download? (http, ftp, bittorent, ...)

I have used http do download the openafs sources

# cd /usr/pkgsrc/net/openafs
# grep MASTER_SITE Makefile
MASTER_SITES=   http://www.openafs.org/dl/openafs/1.4.0/
# make fetch

but other downloads also stall 

> Have you followed the download stream on your Alpha with tcpdump or
> ethereal?

sorry for the line wrapping. This is an extract from the time where
wget, ftp or "make fetch" respectively stall's. I can't find anything
suspicious within it.

[...]
21:38:43.641411 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 268641:270101(1460) ack 137 win 6432
21:38:43.641527 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 270101 win 33580
21:38:43.827751 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 271561:273021(1460) ack 137 win 6432
21:38:43.827823 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 270101 win 33580 <nop,nop,sack
sack 1 {271561:273021} >
21:38:44.018931 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 270101:271561(1460) ack 137 win 6432
21:38:44.019009 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 273021 win 30660
21:38:44.019110 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 273021 win 33580
21:38:44.210755 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: P 273021:274481(1460) ack 137 win 6432
21:38:44.397311 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 274481:275941(1460) ack 137 win 6432
21:38:44.397380 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 275941 win 32120
21:38:48.534617 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 275941:277401(1460) ack 137 win 6432
21:38:48.534748 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 277401 win 33580
21:38:48.877035 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 277401:278861(1460) ack 137 win 6432
21:38:49.063375 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 278861:280321(1460) ack 137 win 6432
21:38:49.063444 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 280321 win 32120
21:38:49.406275 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 280321:281781(1460) ack 137 win 6432
21:38:49.406390 IP proteus.mydomain.com.65456 >
MICHIGAN-OPENAFS.CENTRAL.ORG.www: . ack 281781 win 33580
21:38:49.592402 IP MICHIGAN-OPENAFS.CENTRAL.ORG.www >
proteus.mydomain.com.65456: . 281781:283241(1460) ack 137 win 6432
[...]

-- 
/sp4rc