[pptp-server] GRE out of order again...

[Anders Vännman]

Hi,

Wrote some days ago about GRE-packets out of order; ive changed some in the
syslog to see what the problem is:

Jun 22 20:42:11 vf pptpd[21742]: GRE: Discarding out of order packet 135 -
134
Jun 22 20:42:11 vf pptpd[21742]: GRE: Discarding out of order packet 137 -
136
Jun 22 20:42:12 vf pptpd[21742]: GRE: Discarding out of order packet 157 -
156
Jun 22 20:42:13 vf pptpd[21742]: GRE: Discarding out of order packet 159 -
158
Jun 22 20:42:13 vf pptpd[21742]: GRE: Discarding out of order packet 163 -
162
Jun 22 20:42:13 vf pptpd[21742]: GRE: Discarding out of order packet 167 -
166
Jun 22 20:42:13 vf pptpd[21742]: GRE: Discarding out of order packet 187 -
186
Jun 22 20:42:14 vf pptpd[21742]: GRE: Discarding out of order packet 209 -
208
Jun 22 20:42:23 vf pptpd[21742]: GRE: Discarding out of order packet 272 -
271
Jun 22 20:42:24 vf pptpd[21742]: GRE: Discarding out of order packet 282 -
281

where the first is gre.seq_recv,  and the second is seq. It seems like it's
always one thats differing, as far as I understand the code
the gre.seq_recv is containing whats expected, ie last recieved, and the seq
is what was recieved.

When I have these problems my pptp is awful slow, remoteadmin is faster
trough a 28k modem then via the 256kbs internet that our office have (I have
5mbs at home)

Dont really understand why its a problem.... the only socket that shows up
in netstat is the raw-socket that pptpd makes. Could it be a problem with my
NT VPN 
that keeps sending wrong packets? Perhaps... found some information on
www.macrosoft.com about Fragmentation and Performance Issues with PPTP
Connections... as always they say that one should apply the latest
servicepack :-)

Or could it be the Internet that's dropping some of the packets?

Anders