Question

When I connect to my VPN, I lose internet access

Asked by: raw_enha

I have a mobile broadband USB card (novatel USB760), vista 64 business, on a laptop.  If I use my wireless broadband card for internet access, everything works just fine. however, if I try to connect to my office VPN, i lose internet access yet connect to the vpn and remain connected to verizon.
i have the same configuration on a desktop, but that works just fine (tested with novatel broadband card/verizon and exact same work VPN).
Not being able to use the internet and my VPN is defeating the whole purpose of the connectivity I need.  Any ideas?

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Asked On
2009-02-27 at 13:04:47ID24185179
Tags

vpn

,

internet

,

vzaccess

,

vista 64

Topics

Wireless Technologies

,

Broadband Internet

,

Windows Networking

Participating Experts
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Comments
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Answers

 

by: dvanderhPosted on 2009-02-27 at 13:14:16ID: 23759644

What VPN client are you using?  I've seen this happen in the past with the Cisco VPN client & Vista.  Upgrading the Cisco VPN client to version 5.0.05.0280 fixed the issue.

 

by: raw_enhaPosted on 2009-02-27 at 13:26:07ID: 23759724

I am using Windows to "set up a connection". basically manually creating a vpn without any 3rd party cliient

 

by: dvanderhPosted on 2009-02-27 at 13:36:50ID: 23759797

check this:

http://www.davidmillington.net/news/index.php/2008/02/28/vista_vpn_equals_slow_net_access

    * Head to Start Menu/Settings/Network Connections
    * Right click the VPN connection and choose Properties
    * Select the Networking tab and then the IP v6 item and Properties
    * On the new popup click Advanced and then on the IP Settings tab untick the "Use default gateway on remote network" box
    * Repeat the last two steps for the IP v4 item
    * Now click OK to close the VPN properties panel and give it a go

 

by: raw_enhaPosted on 2009-02-27 at 13:49:07ID: 23759883

dvanderh:

well it keeps internet access now, but no VPN network abilities, it's ignoring my DHCP/login info, it's giving me a 169.254.0.25  instead of 192.168.0.150 specified in my login credentials.  trying this on another machine; my login gives me the correct network address via VPN. so still something weird going on

 

by: mwecomputersPosted on 2009-03-04 at 17:09:26ID: 23801622

Under Vista, I recommend disabling the TCP auto-tuning as well:

netsh interface tcp set global autotuning=disabled
netsh interface tcp set global chimney=disabled
netsh interface tcp set global rss=disabled

Reference:
http://silverstr.ufies.org/blog/archives/001035.html

---

Also, if your work is using Cisco as their VPN endpoint, you usually need to use the Cisco VPN client and also make sure that split-tunneling is enabled on the endpoint side as well.

 

by: cPosted on 2009-03-04 at 23:58:04ID: 23803319

If I was to take a wild guess I woul say that when you connect to vpn your computer is instructed by the remote side to change some TCP/IP settings such as routes or nameserver.
To debug that I would need the following:
1. The output of ipconfig /all before you connect to the VPN
2. The output of ipconfig /all after you connect to the VPN
You can go to Start - > Run -> Type cmd and afterwards type ipconfig /all

Regards,

C

 

by: raw_enhaPosted on 2009-03-06 at 06:18:44ID: 23816686

pre VPN ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : HDS-Mike-2
   Primary Dns Suffix  . . . . . . . : HDS.local
   Node Type . . . . . . . . . . . . : Broadcast
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : HDS.local

PPP adapter Verizon Wireless - VZAccess:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Verizon Wireless - VZAccess
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 70.198.180.20(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 0.0.0.0
   DNS Servers . . . . . . . . . . . : 66.174.95.44
                                       66.174.92.14
   NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wireless Network Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) WiFi Link 5300 AGN
   Physical Address. . . . . . . . . : 00-21-6A-1E-C2-26
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

 

by: raw_enhaPosted on 2009-03-06 at 06:19:20ID: 23816688

post vpn ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : HDS-Mike-2
   Primary Dns Suffix  . . . . . . . : HDS.local
   Node Type . . . . . . . . . . . . : Broadcast
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : HDS.local

PPP adapter HDS VPN:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HDS VPN
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Autoconfiguration IPv4 Address. . : 169.254.0.25(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . :
   DNS Servers . . . . . . . . . . . : 192.168.0.10
   NetBIOS over Tcpip. . . . . . . . : Enabled

PPP adapter Verizon Wireless - VZAccess:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Verizon Wireless - VZAccess
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 70.198.180.20(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 0.0.0.0
   DNS Servers . . . . . . . . . . . : 66.174.95.44
                                       66.174.92.14
   NetBIOS over Tcpip. . . . . . . . : Enabled

 

by: raw_enhaPosted on 2009-03-06 at 06:49:13ID: 23817035

mwecomputers:

i tried disabling the tcp tuning as per your instructions, but no change.  seems that DHCP is somehow the issue here, but i don't know how.  if it would be somehow set to "enabled" it should grab the correct IP from our VPN server, as it does on all the other computers i connect with

 

by: cPosted on 2009-03-06 at 07:01:21ID: 23817140

Please also provide the output of "route print" in the same manner, before and after connecting to the VPN server.

Regards,

C

 

by: raw_enhaPosted on 2009-03-06 at 08:13:43ID: 23818011

prevpn "route print"

===========================================================================
Interface List
 24 ........................... Verizon Wireless - VZAccess
 17 ...00 21 6a 1e c2 26 ...... Intel(R) WiFi Link 5300 AGN
 11 ...00 21 70 d0 39 a3 ...... Intel(R) 82567LM Gigabit Network Connection
  1 ........................... Software Loopback Interface 1
 16 ...00 00 00 00 00 00 00 e0  isatap.{C8ACE402-5C00-4745-9841-6755E910EA2A}
 10 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface
 12 ...00 00 00 00 00 00 00 e0  isatap.{560A6299-F340-418C-A6BE-786BB7FD8027}
 13 ...00 00 00 00 00 00 00 e0  isatap.pen.apac.dell.com
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         On-link      75.192.71.80     51
     75.192.71.80  255.255.255.255         On-link      75.192.71.80    306
        127.0.0.0        255.0.0.0         On-link         127.0.0.1   4531
        127.0.0.1  255.255.255.255         On-link         127.0.0.1   4531
  127.255.255.255  255.255.255.255         On-link         127.0.0.1   4531
        224.0.0.0        240.0.0.0         On-link         127.0.0.1   4531
        224.0.0.0        240.0.0.0         On-link      75.192.71.80     51
  255.255.255.255  255.255.255.255         On-link         127.0.0.1   4531
  255.255.255.255  255.255.255.255         On-link      75.192.71.80    306
===========================================================================
Persistent Routes:
  None

IPv6 Route Table
===========================================================================
Active Routes:
 If Metric Network Destination      Gateway
  1    306 ::1/128                  On-link
  1    306 ff00::/8                 On-link
===========================================================================
Persistent Routes:
  None

 

by: raw_enhaPosted on 2009-03-06 at 08:14:10ID: 23818019

post vpn "route print"

===========================================================================
Interface List
 25 ........................... HDS VPN
 24 ........................... Verizon Wireless - VZAccess
 17 ...00 21 6a 1e c2 26 ...... Intel(R) WiFi Link 5300 AGN
 11 ...00 21 70 d0 39 a3 ...... Intel(R) 82567LM Gigabit Network Connection
  1 ........................... Software Loopback Interface 1
 16 ...00 00 00 00 00 00 00 e0  isatap.{C8ACE402-5C00-4745-9841-6755E910EA2A}
 10 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface
 12 ...00 00 00 00 00 00 00 e0  isatap.{560A6299-F340-418C-A6BE-786BB7FD8027}
 13 ...00 00 00 00 00 00 00 e0  isatap.pen.apac.dell.com
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         On-link      75.192.71.80     51
    71.251.216.29  255.255.255.255         On-link      75.192.71.80     51
     75.192.71.80  255.255.255.255         On-link      75.192.71.80    306
        127.0.0.0        255.0.0.0         On-link         127.0.0.1   4531
        127.0.0.1  255.255.255.255         On-link         127.0.0.1   4531
  127.255.255.255  255.255.255.255         On-link         127.0.0.1   4531
      169.254.0.0      255.255.0.0         On-link      169.254.0.25    306
     169.254.0.25  255.255.255.255         On-link      169.254.0.25    306
  169.254.255.255  255.255.255.255         On-link      169.254.0.25    306
      192.168.0.0    255.255.255.0    192.168.0.143     169.254.0.25     51
        224.0.0.0        240.0.0.0         On-link         127.0.0.1   4531
        224.0.0.0        240.0.0.0         On-link      75.192.71.80     51
  255.255.255.255  255.255.255.255         On-link         127.0.0.1   4531
  255.255.255.255  255.255.255.255         On-link      75.192.71.80    306
  255.255.255.255  255.255.255.255         On-link      169.254.0.25    306
===========================================================================
Persistent Routes:
  None

IPv6 Route Table
===========================================================================
Active Routes:
 If Metric Network Destination      Gateway
  1    306 ::1/128                  On-link
  1    306 ff00::/8                 On-link
===========================================================================
Persistent Routes:
  None

 

by: mwecomputersPosted on 2009-03-06 at 08:22:38ID: 23818122

I recommend disabling your IPv6 interface as well. This is known to cause problems if you aren't utilizing the hardware or network configuration for it.

Vista -- Disable IPv6
http://www.lboro.ac.uk/it/vista/ipv6.html

---

When you are using your USB for connectivity, is your internal wireless card also on? If so, try disabling it to see if that helps as sometimes it might be an IP address conflict.

---
Possible solution...

Configuring a split tunnel pptp vpn in Windows Vista
http://www.isinc.com/2008/04/11/configuring-a-split-tunnel-pptp-vpn-in-windows-vista/

 

by: raw_enhaPosted on 2009-03-06 at 09:09:44ID: 23818712

disabled IPv6 completely as per instructions and restarted.
the split tunnel was already done.
trying the USB wireless with VPN while internal wireless was turned off produced no change.

note, if i do an ipconfig release on the vpn, it tells me that it is not configured for DHCP. this seems like the hang up, as it's not willing to get the IP assignment from the DHCP vpn server

 

by: raw_enhaPosted on 2009-03-08 at 12:32:35ID: 23830873

since this evolved into a different issue, i'm going to issue points for the exact answer to the initial question, and create a new question called "IP address not being assigned to my VPN connection"

 

by: raw_enhaPosted on 2009-03-08 at 12:33:39ID: 31552289

the unclicking "use default gateway" did the trick

 

by: jlmartinjrPosted on 2009-11-17 at 13:14:47ID: 25844259

I read the information about changing the IP4 and IP6 properties on the VPN connection,  however with the Vista Business machine that I am running when I go to the advanced tab on the either of the two protocols their is not a box for Use default gateway on remote network.
Any suggestions of how to manually configure this?

20120131-EE-VQP-002

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