Re: [pptp-devel] pptp connection dies in pptp-linux_1.9.* Works fine in pptp-linux_1.8.0-1

[dz <dz...@gm...>]

Thanks for your prompt reply!
However default Ubuntu 18.04 pptp-linux v.1.9.0+ds-2 does not seem to 
recognize the option:
---
pon provider --missing-window 300
/usr/sbin/pppd: unrecognized option '--missing-window'
pppd version 2.4.7
Usage: /usr/sbin/pppd [ options ], where options are:
         <device> Communicate over the named device
         <speed> Set the baud rate to <speed>
         <loc>:<rem> Set the local and/or remote interface IP
                         addresses. Either one may be omitted.
         asyncmap <n> Set the desired async map to hex <n>
         auth Require authentication from peer
         connect <p> Invoke shell command <p> to set up the serial line
         crtscts Use hardware RTS/CTS flow control
         defaultroute Add default route through interface
         file <f> Take options from file <f>
         modem Use modem control lines
         mru <n> Set MRU value to <n> for negotiation
See pppd(8) for more options.
---
Should a version of the package understanding the option be installed 
from a specific location other than default Ubuntu 18.04 repository?

------ Wiadomość oryginalna ------
Od: "James Cameron" <qu...@la...>
Do: "dz" <dz...@gm...>
DW: ppt...@li...
Data: 21.09.2018 00:05:36
Temat: Re: [pptp-devel] pptp connection dies in pptp-linux_1.9.* Works 
fine in pptp-linux_1.8.0-1

>Your network environment is probably unusual, with duplicate or
>dropped packets.
>
>Please try adding --missing-window 300 to the pptp command.
>
>That was the default in 1.8.0, and it was disabled in 1.9.0.
>
>On Thu, Sep 20, 2018 at 07:10:50PM +0000, dz wrote:
>>Dear developers,
>>
>>After upgrading Ubuntu and hence pptp-linux package to version 
>>1.9.0+ds-2 my
>>connection to an Asus home router-based pptp server dies after some 
>>minutes
>>of active usage throwing in syslog a burst of dozens of messages
>>"pptp[1320]: anon warn[pqueue_add:pqueue.c:151]: discarding duplicate 
>>packet
>>nnnnn".
>>The connection is still on and ppp0 is shown among interfaces but no 
>>data
>>goes through. Disconnecting and re-connecting resolves the issue just 
>>for
>>few minutes of active use.
>>Uninstalling 1.9.0+ds-2 version of pptp-linux and installing instead
>>pptp-linux_1.8.0-1_amd64.deb fixes the issue. Occasional single 
>>messages
>>"discarding duplicate packet yyyyy" appear in the log with no impact 
>>to the
>>connection. It stays on and works stable for days.
>>The problem is repeatable. I have installed a fresh formatted test 
>>system
>>with ubuntu-18.04.1-server-amd64 OS and pptp-linux v.1.9.0+ds-2 and 
>>the
>>problem was there at once. Downgrading to 
>>pptp-linux_1.9.0+ds-1_amd64.deb
>>does not solve the issue. Downgrading to v.1.8.0-1 does solve it at 
>>once.
>>Providing a relevant fragment of syslog for the reference:
>>---
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58793
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58797
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58839
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58840
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58841
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58842
>>...
>>Sep 19 23:12:18 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58884
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58885
>>...
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58906
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58907
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58908
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58909
>>Sep 19 23:12:19 dz-test pptp[1320]: anon 
>>warn[pqueue_add:pqueue.c:151]:
>>discarding duplicate packet 58910
>>---
>>After the last line the connection became unusable.
>>I could provide more information if needed.
>>Please help to investigate the issue and possibly to resolve it in the 
>>next
>>version of pptp-linux package.
>>
>>With best regards, Dmitry
>>
>>
>>
>>_______________________________________________
>>pptpclient-devel mailing list
>>ppt...@li...
>>https://lists.sourceforge.net/lists/listinfo/pptpclient-devel
>
>--
>James Cameron
>http://quozl.netrek.org/