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

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

Hello,

Adding --missing-window 300 to pptp command does not solve the issue in 
v.1.9.0+ds-2.
Still the connection stalls after a burst of 'discarding duplicate 
packet' warnings:
---
Sep 21 22:36:34 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166186
Sep 21 22:36:34 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166188
Sep 21 22:36:34 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166189
...
Sep 21 22:36:36 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166295
Sep 21 22:36:36 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166296
Sep 21 22:36:36 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166297
Sep 21 22:36:36 dz-test pptp[1620]: anon warn[pqueue_add:pqueue.c:151]: 
discarding duplicate packet 166298
---
Should I try anything else?

Regards, Dmitry

------ Wiadomość oryginalna ------
Od: "James Cameron" <qu...@la...>
Do: "dz" <dz...@gm...>
DW: ppt...@li...
Data: 21.09.2018 02:35:12
Temat: Re: [pptp-devel] pptp connection dies in pptp-linux_1.9.* Works 
fine in pptp-linux_1.8.0-1

>It's an option for pptp, not an option for pppd.
>
>On Thu, Sep 20, 2018 at 10:20:55PM +0000, dz wrote:
>>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/
>>
>
>--
>James Cameron
>http://quozl.netrek.org/