[imp] Attachments on Windows 7/Vista

[Ryan Beatty]

Hello,

I am still struggling with this. I have used wireshark to trace the session
when uploading a file. In the trace it works fine for a while and then I get
TCP DUP ack failures. Eventually the upload times out.

When transferring from the xp machine on the same network, its all green, no
issues, no failures as above.

I have disabled autotuning of the connection in Windows 7 as per this page.
http://8help.osu.edu/3253.html

I have also played around with the mtu size, however , no joy.

Does anyone know anything else I might be able to try?

Thanks,

Ryan


On Fri, Dec 11, 2009 at 11:20 AM, <lst_hoe02 at kwsoft.de> wrote:

> Zitat von Ryan Beatty <ryan.beatty at gmail.com>:
>
>
>  Hello,
>>
>> I was wondering if anyone else had come across issues with Windows 7/Vista
>> and uploading attachments when composing an email?
>>
>> I am able to reproduce the error on a number of Windows 7 machines, using
>> Chrome, IE8 and Mozilla.
>>
>> When uploading the attachment, it just times out after around 5 minutes.
>>
>> I am however able to attach files from an XP machine, Server 2003, Ubuntu.
>>
>
> This looks like TCP/IP problem and there is nothing Horde/IMP can do about
> it. The latest Microsoft OS are now using "modern" TCP/IP features like
> window-scaling,SACK and MTU-discover by default and there are still broken
> routers/firewalls around which choke on this.
> This is the most supektable reason because as you said all browsers fail on
> Vista/7 and work and XP/2003.
>
> You have to use some TCP-dumper to see what is going on.
>
> Regards
>
> Andreas
>
>
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