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PPTP VPN connection problem #938

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
I'm having problem connecting to my home network through the PPTP VPN server on 
my N56U router.

My settings:
1. Activate PPTP under VPN Server
2. Authentication: MS-CHAP v2 only
3. MPPE: Auto
4. Broadcast traffic: Both directions
5. MTU: 1460
6. MRU: 1460
7. Create username/password and save.

The log on the router during the connection attempt:

Aug 14 17:03:05 pptpd[3861]: CTRL: Client x.x.x.x control connection started
Aug 14 17:03:05 pptpd[3861]: CTRL: Starting call (launching pppd, opening GRE)
Aug 14 17:03:05 pppd[3862]: Plugin pptp.so loaded.
Aug 14 17:03:05 pppd[3862]: PPTP plugin version 0.8.5 compiled for pppd-2.4.5
Aug 14 17:03:05 pppd[3862]: pppd 2.4.5 started by admin, uid 0
Aug 14 17:03:05 pppd[3862]: Using interface ppp10
Aug 14 17:03:05 pppd[3862]: Connect: ppp10 <--> pptp (x.x.x.x)
Aug 14 17:03:35 pppd[3862]: LCP: timeout sending Config-Requests
Aug 14 17:03:35 pppd[3862]: Connection terminated.
Aug 14 17:03:35 pppd[3862]: Modem hangup
Aug 14 17:03:35 pppd[3862]: Exit.
Aug 14 17:03:35 pptpd[3861]: CTRL: Reaping child PPP[3862]
Aug 14 17:03:35 pptpd[3861]: CTRL: Client pppd TERM sending
Aug 14 17:03:35 pptpd[3861]: CTRL: Client pppd finish wait
Aug 14 17:03:35 pptpd[3861]: CTRL: EOF or bad error reading ctrl packet length.
Aug 14 17:03:35 pptpd[3861]: CTRL: couldn't read packet header (exit)
Aug 14 17:03:35 pptpd[3861]: CTRL: Fatal error reading control message in 
disconnect sequence
Aug 14 17:03:35 pptpd[3861]: CTRL: Client x.x.x.x control connection finished

I've tried with both my Apple Ipad 2 and my Samsung Galaxy S4 and I'm running 
RT-N56U_3.4.3.6-064_full on my N56U. Earlier versions of the router firmware 
worked just fine, I don't remember which version..

Original issue reported on code.google.com by Buskdok...@gmail.com on 14 Aug 2013 at 3:16

GoogleCodeExporter commented 9 years ago 
Still doesn't work with RT-N56U_3.4.3.6-066_full.

Original comment by Buskdok...@gmail.com on 26 Aug 2013 at 11:19

GoogleCodeExporter commented 9 years ago 
Hi, I've hit the same issue. The behavior I've seen is as follows:

1) Connect to VPN from other device (laptop, phone, etc..) works as planned, 
then disconncet
2) Trying to connect from the N56 timesout as above (30 sec)
3) reboot N56 router
4) Then I can connect to my VPN from the router
5) Disconnect the router from the VPN
6) Try to connect from laptop (like step 1), timeouts like above

Looking at the debug logs, it looks like the GRE packets aren't being passed 
through the router after one connection has been established and the router 
needs to be rebooted to get a connection up again. Connecting from the same 
device over and over works as expected.

Thanks,
Marc

Original comment by mra...@gmail.com on 24 Sep 2013 at 2:12

GoogleCodeExporter commented 9 years ago 
Experiencing this on 3.4.3.6-068 as well.

Original comment by st...@dogsbyte.net on 22 Jan 2014 at 12:58

GoogleCodeExporter commented 9 years ago 
same problem here with RT-AC66U

Original comment by karel.st...@gmail.com on 8 Feb 2014 at 3:38

GoogleCodeExporter commented 9 years ago 
Having the same issue on RT-N16 with Firmware Version:3.0.0.4.374_4561

Original comment by adriano....@gmail.com on 12 Mar 2014 at 8:19

GoogleCodeExporter commented 9 years ago 
Having the same problem with 3.0.3.8-080, on RT-N56U

Apr  9 14:19:55 pptpd[580]: CTRL: Client 77.16.202.74 control connection started
Apr  9 14:19:55 pptpd[580]: CTRL: Starting call (launching pppd, opening GRE)
Apr  9 14:19:56 pppd[581]: Plugin pptp.so loaded.
Apr  9 14:19:56 pppd[581]: PPTP plugin version 0.8.5 compiled for pppd-2.4.6
Apr  9 14:19:56 pppd[581]: pppd 2.4.6 started by admin, uid 0
Apr  9 14:19:56 pppd[581]: Using interface ppp10
Apr  9 14:19:56 pppd[581]: Connect: ppp10 <--> pptp (77.16.202.74)
Apr  9 14:20:26 pppd[581]: LCP: timeout sending Config-Requests
Apr  9 14:20:26 pppd[581]: Connection terminated.
Apr  9 14:20:26 pppd[581]: Modem hangup
Apr  9 14:20:26 pppd[581]: Exit.
Apr  9 14:20:26 pptpd[580]: CTRL: Reaping child PPP[581]
Apr  9 14:20:26 pptpd[580]: CTRL: Client pppd TERM sending
Apr  9 14:20:26 pptpd[580]: CTRL: Client pppd finish wait
Apr  9 14:20:31 pptpd[580]: CTRL: Client 77.16.202.74 control connection 
finished

Anyone with a solution?

Original comment by opp...@gmail.com on 9 Apr 2014 at 12:31

GoogleCodeExporter commented 9 years ago 
The same problem.

The first connect is fine.
When I tried to install the second connection it stuck.

firmware 3.4.3.7-072 on RT-N56U.

Oct 29 14:44:59 pptpd[13327]: CTRL: Client xxx.84.xxx.188 control connection 
started
Oct 29 14:44:59 pptpd[13327]: CTRL: Starting call (launching pppd, opening GRE)
Oct 29 14:44:59 pppd[13328]: Plugin pptp.so loaded.
Oct 29 14:44:59 pppd[13328]: PPTP plugin version 0.8.5 compiled for pppd-2.4.5
Oct 29 14:44:59 pppd[13328]: pppd 2.4.5 started by admin, uid 0
Oct 29 14:44:59 pppd[13328]: Couldn't allocate PPP unit 10 as it is already in 
use
Oct 29 14:44:59 pppd[13328]: Using interface ppp11
Oct 29 14:44:59 pppd[13328]: Connect: ppp11 <--> pptp (xxx.84.xxx.188)
Oct 29 14:45:29 pppd[13328]: LCP: timeout sending Config-Requests
Oct 29 14:45:29 pppd[13328]: Connection terminated.
Oct 29 14:45:29 pppd[13328]: Modem hangup
Oct 29 14:45:29 pppd[13328]: Exit.
Oct 29 14:45:29 pptpd[13327]: CTRL: Reaping child PPP[13328]
Oct 29 14:45:29 pptpd[13327]: CTRL: Client pppd TERM sending
Oct 29 14:45:29 pptpd[13327]: CTRL: Client pppd finish wait
Oct 29 14:45:29 pptpd[13327]: CTRL: Client xxx.84.xxx.188 control connection 
finished

Original comment by knave2...@gmail.com on 29 Oct 2014 at 11:08