[pptp-server] flakey adsl

[Charlie Brady]

On Tue, 7 Aug 2001, Michael Hayes wrote:

> I have a remote site in New Zealand using pppoa (jetsream) to connect back
> to my Melbourne Australia based host running a 2mb fibre link.  The host
> side of the connection is rock solid, I can keep 100+ hour connections from
> my home cable modem (melbourne based), but the pppoa seems to get heaps of
> atm errors, these cause me no end of problems.  After a series of these atm
> errors the vpn connection drops, does anyone know of a way to build some
> more fail over protection into poptop.  I am using 1.1.2 version of poptop
> with kernel 2.4.5 and full encryption.  I'm not looking for a magic bullet,

Are you sure?

> more so something that may help keep the connection up for longer than 15
> odd minutes.
>
> Any sughestions would be well received.

If you can't avaoid pppoa, then I'd suggest that you investigate using
IPSEC. The PPTP protocol isn't robust in the face of missing or out of
order packets. The version of poptop you are using does its best to
reorder out-of-order packets before the get to the MPPE decrypter, but it
can only do so much.

  Charlie Brady                         charlieb at e-smith.com
  http://www.e-smith.org (development)  http://www.e-smith.com (corporate)
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