>
> > For Windoze XP, 2k or NT users, try setting the reg key:
> >
> >
> >
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tcpip\par
> ameters\Enable
> > PMTUBHDetect to 1.
> >
> >This will allow automatic 'Black Hole' router detection and
> scale the MTU
> to
> > suit.
>
> I had actually tried this on the weekend and it seemed to
> work but I wasn't
> going to jump in and say so until I was sure ;)
>
> Anyhow, as Rob suggests, turning on Black Hole Detection, in
> XP in my case,
> seems to fix the NB Online banking issue for me.
>
> Thanks for everybody's suggestions.
>
> Andrew
>
>
>
With this regkey set, when Windows detects this situation it does crank the
MTU down to 576 bytes on a per connection basis, so on sustained traffic
your throughput will be a bit slower to these sites, but at least it will
work.

Here's some info on the whys 'n wherefores.

http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q159211&
http://support.microsoft.com/default.aspx?scid=KB;EN-US;q314825&

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