[strongSwan] Tunnels are fluctuating in case of ppp connection

Andreas Steffen andreas.steffen at strongswan.org
Tue Jul 28 17:12:34 CEST 2015


So can you show me the corresponding strongSwan server log?

Andreas

On 07/28/2015 02:33 PM, Nitin Agarwal wrote:
> Hi Andreas
> 
> On server side, I am using :-
> Linux strongSwan U4.6.2/
> 
> And, on modem side :-
> Linux[Debian, Voyage] strongSwan U4.4.1
> 
> 
> *Best Regards*
> *Nitin Agarwal*
> *Team Leader R&D*
> *Symstream Technology Group*
> M +91 9818893018
> _nitin.agarwal at symstream.com <mailto:nitin.agarwal at symstream.com>_ |
> Skype: nitin_symstream
> 
>      
> 
> 
> 
> 
> 
> On Tue, Jul 28, 2015 at 3:22 PM, Andreas Steffen
> <andreas.steffen at strongswan.org <mailto:andreas.steffen at strongswan.org>>
> wrote:
> 
>     Hi Nitin,
> 
>     what VPN product is running on the server, since 1) it produces
>     notifications in an invalid format and 2) it probably speaks
>     IKEv1 only, because it replies with INVALID_MAJOR_VERSION to
>     an IKEv2 request?
> 
>     Best regards
> 
>     Andreas
> 
>     On 28.07.2015 10:40, Nitin Agarwal wrote:
> 
>         Hi Noel
> 
>         I have done the changes, But still the tunnels are down for upto 10
>         minutes, sometime.
>         This is what I got from Syslog, and these errors are different at
>         different times :-
> 
>         1)
>         Jul 28 09:28:36 alix6f2-619703 charon: 12[IKE] initiating IKE_SA
>         52.64.105.113_cnc[2] to 52.74.240.246
>         Jul 28 09:28:36 alix6f2-619703 charon: 12[ENC] generating
>         IKE_SA_INIT
>         request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) ]
>         Jul 28 09:28:36 alix6f2-619703 charon: 12[NET] sending packet: from
>         100.116.187.100[500] to 52.74.240.246[500]
>         Jul 28 09:28:37 alix6f2-619703 charon: 16[NET] received packet: from
>         52.74.240.246[500] to 100.116.187.100[500]
>         Jul 28 09:28:37 alix6f2-619703 charon: 16[ENC] invalid notify data
>         length for INVALID_MAJOR_VERSION (20)
>         Jul 28 09:28:37 alix6f2-619703 charon: 16[ENC] *NOTIFY payload
>         verification failed *
>         Jul 28 09:28:37 alix6f2-619703 charon: 16[IKE] IKE_SA_INIT
>         response with
>         message ID 0 processing failed
>         Jul 28 09:28:40 alix6f2-619703 charon: 13[IKE] retransmit 1 of
>         request
>         with message ID 0
> 
> 
>         2) Jul 28 09:29:40 alix6f2-619703 charon: 13[ENC] generating
>         IKE_SA_INIT
>         request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) ]
>         Jul 28 09:29:40 alix6f2-619703 charon: 13[NET] sending packet: from
>         100.116.187.100[500] to 52.74.240.246[500]
>         Jul 28 09:29:41 alix6f2-619703 charon: 16[NET] received packet: from
>         52.74.240.246[500] to 100.116.187.100[500]
>         Jul 28 09:29:41 alix6f2-619703 charon: 16[ENC] parsed IKE_SA_INIT
>         response 0 [ N(INVAL_SYN) ]
>         Jul 28 09:29:41 alix6f2-619703 charon: 16[IKE]*received
>         INVALID_SYNTAX
>         notify error *
> 
> 
>         can anybody please suggest why this is happening ?
> 
> 
> 
> 
>         *Best Regards*
>         *Nitin Agarwal*
> 
> 
> 
> 
> 
> 
>         On Wed, Jul 22, 2015 at 3:59 PM, Noel Kuntze
>         <noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>
>         <mailto:noel at familie-kuntze.de <mailto:noel at familie-kuntze.de>>>
>         wrote:
> 
> 
> Hello Nitin,
> 
> You're using IKEv2, which uses a global timeout setting in
> strongswan.conf,
> not dpdtimeout.
> - From the man page for ipsec.conf:
>         dpdtimeout = 150s | <time>
>                defines the timeout interval, after which all
> connections to a peer are deleted in case of inactivity.
>>         This only
> applies to IKEv1,  in  IKEv2  the  default  retransmission
>                timeout applies, as every exchange is used to
>>         detect
> dead peers.
> 
> Look at the "IKEv2 RETRANSMISSION" section of the man page for
> strongswan.conf.
> 
> Alternatively, use IKEv1.
> 
> Mit freundlichen Grüßen/Kind Regards,
> Noel Kuntze
> 
> GPG Key ID: 0x63EC6658
> Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658
> 
> Am 22.07.2015 um 07:26 schrieb Nitin Agarwal:
>> Hello Guys
> 
>> I am trying to achieve stable tunnel connectivity between
>>         two systems.
>> My System 1 is a modem having ppp connection.And, System 2
>>         is a server.
> 
>> On System 1, IP use to change and whenever IP changes,
>>         sometime system takes upto 20 minutes to form stable tunnel.
>>         Sometime is just 50 seconds also. PPP connection takes around 25
>>         seconds to release old IP and acquire new one.
> 
>> I am attaching the existing configuration.
>> Please suggest, if I need to modify the configurations or
>>         I am missing something.
> 
> 
> 
> 
>  > *Best Regards*
>  > *Nitin Agarwal*
> 
> 
> 
> 
> 
> 
> 
> 
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>     -- 
>     ======================================================================
>     Andreas Steffen                       
>      andreas.steffen at strongswan.org <mailto:andreas.steffen at strongswan.org>
>     strongSwan - the Open Source VPN Solution!         
>     www.strongswan.org <http://www.strongswan.org>
>     Institute for Internet Technologies and Applications
>     University of Applied Sciences Rapperswil
>     CH-8640 Rapperswil (Switzerland)
>     ===========================================================[ITA-HSR]==
> 
> 
> 
> This message (and any associated files) is intended only for the use of
> the individual or entity to which it is addressed and may contain
> information that is confidential, subject to copyright or constitutes a
> trade secret. If you are not the intended recipient you are hereby
> notified that any dissemination, copying or distribution of this
> message, or files associated with this message, is strictly prohibited.
> If you have received this message in error, please notify Symstream
> Technology Group immediately by replying to the message and deleting it
> from your computer. Messages sent to and from us may be monitored.
> Internet communications cannot be guaranteed to be secure or error-free
> as information could be intercepted, corrupted, lost, destroyed, arrive
> late or incomplete, or contain viruses. Therefore, we do not accept
> responsibility for any errors or omissions that are present in this
> message, or any attachment, that have arisen as a result of e-mail
> transmission. If verification is required, please request a hard-copy
> version. Any views or opinions presented are solely those of the author
> and do not necessarily represent those of the company.
> ------------------------------------------------------------------------

-- 
======================================================================
Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Open Source VPN Solution!          www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
===========================================================[ITA-HSR]==

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