Hilton Travis wrote:
> Archie Cobbs on the MPD mailing list knows nothing of this XP PPTP issue
> - what is it exactly. He says that "I don't know what the "XP PPTP
> issue" is, but there is an issue that could be related that relates to a
Well, enough people have reported problems with XP, PPTP and MPD at
> certain ACK timeout in PPTP. This was changed from 10 to 1 second in
> FBSD 4.9, which should help in certain cases of high packet loss."
Not quite true. According to
it has been changed in FreeBSD 5.2 and 4-STABLE, but not 4.9. m0n0wall
has had the patch (PPTP_MAX_TIMEOUT from 10 -> 1 second) since pb21. It
seems to make things better, but does not completely resolve the issue
(as one would expect, given that only a timeout value was changed).
> Is that the issue to which you are referring? If not, please elaborate
> so we can see if this issue can also be solved.
It's been a while since I last tried it, but the symptoms were high
packet loss (> 50%) and relatively high error counts reported in the
Windows PPTP VPN connection status window. I used to think that the
problem only occurred with Windows XP because at that time I only had
problems with XP machines (BTW, even on completely standard FreeBSD
systems with MPD, not just m0n0wall) while 2000 machines worked fine,
but that may not necessarily be true. I switched to poptop in that
application and it worked fine, but I really don't want to do this with
m0n0wall because poptop is about 8 times slower since it uses userland
PPP (and this can be really important on net45xxs, for example).
That said, personally I don't really care about it anymore since now
that mobile user IPsec works, I don't use PPTP anymore. But there may be
other m0n0wall users who are experiencing the same problem - step
forward, please! :)