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vpn reconnects after every 2 minutes

AnmolDubey_
New Contributor

vpn reconnects after every 2 minutes

I am facing this issue since i started using airtel 4g network (via ZTE wireless router)

 

Details:

 

OS - Win7

Network - airtel 4g lte

router - zte mf 29 wireless

NC version - 6.5.0 and 7.0.0

Problem - vpn disconnect after every 120 seconds. the vpn works fine with docomo 3g connection on same machine.

 

Attaced is wireshark screen

 

-Anmol Dubey

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6 REPLIES 6
zanyterp_
Respected Contributor

Re: vpn reconnects after every 2 minutes

Have you checked with the 4G vendor to confirm it allows persistent connections so the control channel will stay open?
AnmolDubey_
New Contributor

Re: vpn reconnects after every 2 minutes

any more inputs?

Kita_
Valued Contributor

Re: vpn reconnects after every 2 minutes

It looks like the reset is happening from the router. Is there a http timeout setting of 120 seconds on the router? Nc and pulse need a constant connection via port 443. If tcp connection is closed, it will cause tunnel disruptions.
AnmolDubey_
New Contributor

Re: vpn reconnects after every 2 minutes

below are the log entries

 

 


00130,09 2013/10/29 23:13:28.502 1 SYSTEM dsNcService.exe dsNcService p2044 t1334 ncp_dsssl.cpp:803 - 'DSSSL_recv' returned 0x2746 error.
00137,09 2013/10/29 23:13:28.503 5 SYSTEM dsNcService.exe dsNcService p2044 t1334 DSSSLSock.cpp:2018 - 'dsssl' Error 10038 sending close notify

00153,09 2013/10/29 23:13:28.503 5 SYSTEM dsNcService.exe dsNcService p2044 t1334 ncp_dsssl.cpp:1225 - 'worker' Calling NCP_DISCONNECT_DONE for conn PTL2672:443
00126,09 2013/10/29 23:13:28.504 5 SYSTEM dsNcService.exe dsNcService p2044 t2CC ncphandler.cpp:214 - 'ncphandler' got 6 NCP callback
00154,09 2013/10/29 23:13:28.504 3 SYSTEM dsNcService.exe dsNcService p2044 t2CC ncphandler.cpp:284 - 'ncphandler' control channel disconnected due to error 2746
00127,09 2013/10/29 23:13:28.504 3 SYSTEM dsNcService.exe dsNcService p2044 t2CC session.cpp:552 - 'session' reconnecting attempts = 1
00137,09 2013/10/29 23:13:28.504 5 SYSTEM dsNcService.exe dsNcService p2044 t2CC tunnel.cpp:140 - 'ipsec' Releasing ESP engine 010D04F0|010D04F0
00133,09 2013/10/29 23:13:28.504 5 SYSTEM dsNcService.exe dsNcService p2044 t2CC dsio.cpp:308 - 'dsxp' unregister handle 0x00000e64, total 5
00118,09 2013/10/29 23:13:28.504 5 SYSTEM dsNcService.exe dsNcService p2044 t2CC esp.cpp:319 - 'ipsec' uninstallSA 0x54B9EDAE
00120,09 2013/10/29 23:13:28.504 2 SYSTEM dsNcService.exe dsNcService p2044 t2CC esp.cpp:58 - 'ipsec' Cleaning up sa 0x54B9EDAE
00140,09 2013/10/29 23:13:28.504 3 SYSTEM dsNcService.exe dsNcService p2044 t2CC session.cpp:555 - 'session' Registering new timer for reconnection
00138,09 2013/10/29 23:13:28.505 4 SYSTEM dsNcService.exe dsNcService p2044 t2CC adapter.cpp:404 - 'adapter' unregistering the adapter IO handler
00133,09 2013/10/29 23:13:28.505 5 SYSTEM dsNcService.exe dsNcService p2044 t2CC dsio.cpp:308 - 'dsxp' unregister handle 0x00000fe8, total 4

Kita_
Valued Contributor

Re: vpn reconnects after every 2 minutes

Yes, the logs and the tcp dump confirm the control channel (port 443) is being closed.  Do you know if this is occurring for all Pulse/NC users or if this is a select few?  If all users are seeing this issue, this would be a firewall issue to the SA.  If it is a select few, you will need to review a personal router or firewall could be closing the connection.

zanyterp_
Respected Contributor

Re: vpn reconnects after every 2 minutes

In addition to what kita said, what's the dhcp timer? If you receive a new IP it will trigger the disconnect like you are seeing reported