Re: IPv6? Why, you are the first one to ask for it!

2011-03-02 Thread Lars Eggert
On 2011-3-2, at 5:03, JC Dill wrote:
 You can use their reply to an IPv6 request as a bit of a bozo filter

A senior technical person at my local (consumer) ISP here just told me that 
their IPv6 plans are at an early stage and lots of work has to be done 
before they can start testing. (I asked if they had plans for a friendly user 
test I could join.)

He also said that they understand that IPv6 is not ready because OS vendors 
have not implemented IPsec. Talk about a bozo filter...

Lars

PS: ISP is DNA/Welho.

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Re: wanted: your old NAT home router

2010-06-02 Thread Lars Eggert
Hi,

FYI, a first report with test results for 34 devices is available 
athttp://fit.nokia.com/lars/tmp/2010-hgw-study.pdf. Slides that summarize the 
results are at http://fit.nokia.com/lars/tmp/2010-hgw-study-slides.pdf.

We have received another 30-odd devices as donations, which we'll add to the 
testbed and include in a follow-up study.

If you have an unused, spare home gateway to donate to this effort, please 
contact us at nat-st...@fit.nokia.com. We're also interested in obtaining a 
DSLAM and a CMTS.

Thanks,
Lars


On 2010-4-29, at 12:35, Lars Eggert wrote:
 Hi,
 
 for a measurement study done together with Markku Kojo's team at the 
 University of Helsinki, we're looking to collect as many different NAT home 
 routers as possible. If you have an old clunker lying around somewhere, 
 please contact me off-list. I'll cover shipping via DHL. Feel free to forward 
 this email as you see fit.
 
 The boxes will find a permanent home at the University of Helsinki. Study 
 results will be published openly. The intent is that this collection become a 
 resource for the community to be shared for future studies. 
 
 Caveat: The boxes should NAT between Ethernet interfaces - we don't have DSL 
 or cable access equipment in the lab setup at the moment.
 
 Thanks,
 Lars



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wanted: your old NAT home router

2010-04-29 Thread Lars Eggert
Hi,

for a measurement study done together with Markku Kojo's team at the University 
of Helsinki, we're looking to collect as many different NAT home routers as 
possible. If you have an old clunker lying around somewhere, please contact me 
off-list. I'll cover shipping via DHL. Feel free to forward this email as you 
see fit.

The boxes will find a permanent home at the University of Helsinki. Study 
results will be published openly. The intent is that this collection become a 
resource for the community to be shared for future studies. 

Caveat: The boxes should NAT between Ethernet interfaces - we don't have DSL or 
cable access equipment in the lab setup at the moment.

Thanks,
Lars

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Re: wanted: your old NAT home router

2010-04-29 Thread Lars Eggert
Hi,

On 2010-4-29, at 13:49, Phil Regnauld wrote:
   What about getting someone to donate an old DSLAM ?  Wouldn't that help 
 ?

it certainly would, in the longer term. I've also been pointed at mini-DSLAMs 
that are reasonably cheap.

(We're planning to have a first draft study ready mid-May, and for that, the 
best we can do is add more Ethernet-Ethernet NATs to the testbed.)

Lars

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Re: SPF Configurations

2009-12-04 Thread Lars Eggert
On 2009-12-4, at 7:25, John Levine wrote:
 The only major mail system that pays attention to SPF is
 Hotmail

FWIW, GMX (pretty popular in Europe) does too.

Lars

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Re: Shady areas of TCP window autotuning?

2009-03-17 Thread Lars Eggert

On 2009-3-17, at 12:10, Tony Finch wrote:

On Tue, 17 Mar 2009, Joe Maimon wrote:



TCP needs drops to manage to the right speed.


This is whats bad. TCP should be slightly more intelligent and start
considering rtt jitter as its primary source of congestion  
information.


TCP Vegas did this but sadly it never became popular.
(It doesn't compete well with Reno.)


FWIW, Compound TCP does this (shipping with Vista, but disabled by  
default.) There are other delay-based or delay-sensitive TCP flavors,  
too.


Lars

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Re: Shady areas of TCP window autotuning?

2009-03-16 Thread Lars Eggert

Hi,

On 2009-3-16, at 7:09, Leo Bicknell wrote:

My wish is for the vendors to step up.  I would love to be able to
configure my router/cable modem/dsl box with queue-size 50ms and
have it compute, for the current link speed, 50ms of buffer.


if the vendors got active and deployed better queueing schemes, that'd  
be great.


In the meantime, we've also started some work that will allow bulk  
transfer applications to transmit in a way that is designed to  
minimize queue lengths: http://www.ietf.org/html.charters/ledbat-charter.html


Lars

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