On Wed, 1 Jun 2011 10:00:17 -0400
"Jeffrey B. Green" <j...@kikisoso.org> wrote:

> 
> Doing the update from the firewall works, a conversation of 29 packets
> in the captured pcap file. There are still 404s but none of the out of
> sequence/lost sequence messages. Hmmm, now to see which of the packets
> are being dropped...
> 

[Succ: successful conversation; Fail: failed conversation]

The first point of departure is at packet 8:

Succ: HTTP/1.1 304 Not Modified 
Fail: HTTP/1.1 200 OK  (text/plain)

Both responses from debian.org

Then at packet 14:

Succ: GET /dists/squeeze/updates/Release HTTP/1.1 
Fail: [TCP Previous segment lost] Continuation or non-HTTP traffic
(text/html)

The succ is a request from me; the fail is a debian.org response. The
corresponding line on the fail seems to be at packet 16. Packet 15 is a
dup ack in response to 14 (dup of 13).

The debian.org response to packet 16 is:

Fail: HTTP/1.1 304 Not Modified 

The failed conversation then ends with a dup-ack, a fin-ack, a dup-ack,
a fin-ack, and a ack, in alternating directions exc. for 2nd fin-ack.

[If I'm making gross misinterpretations that people see, then please
let me know. Thanks.]

-jeff


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