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07.10.2008 at 07:57AM PDT, ID: 23553999
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7.2

Getting rid of split tunnel VPN

Asked by brandenb in Cisco PIX Firewall, Virtual Private Networking (VPN)

Tags: , ,

I have 3 remote locations that are connected to my main office with VPN tunnels.  They are using split tunnels, however, allowing the internet traffic from those locations to go out over their own connections, instead of coming back to the main location going out over our filtered internet connection here.

I need to change the configuration so that all traffic comes back through the vpn connection, not just internal traffic.  I also need to do this without taking the connection down.  One of the 3 sites is on the other side of the country, and I won't have physical access if something goes wrong.  I do have access to the other 2 sites, so I will be testing on them first.

The code attached is on one of the remote routers.  Here are the relevant addresses:
207.242.55.131 is our PIX address - where the VPN connection terminates on our end
10.81.1.1 is the address of the remote router - this location uses the 10.81.0.0/16 subnet
63.131.12.43 is the public ip address of the router at the remote location
63.131.12.1 is the gateway for the remote location.
10.6.0.0/24 is the subnet of our data center
172.16.0.0/24 is the subnet of our DMZ where our web servers are located

What lines do I need to remove to have it send all traffic over the vpn tunnel instead of just traffic destined for the 10.6 and 172.16 subnets?Start Free Trial 
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crypto isakmp policy 10
 encr 3des
 hash md5
 authentication pre-share
 group 2
crypto isakmp key ******** address 207.242.55.131
crypto isakmp keepalive 30
!
!
crypto ipsec transform-set XFORM esp-3des esp-md5-hmac 
crypto ipsec df-bit clear
!
crypto map VPN 10 ipsec-isakmp 
 set peer 207.242.55.131
 set transform-set XFORM 
 match address 100
!
!
!
interface FastEthernet0/0
 description PRIVATE LAN
 ip address 10.81.1.1 255.255.0.0
 ip nat inside
 ip virtual-reassembly
 ip route-cache flow
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description PUBLIC WAN
 ip address 63.131.12.43 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 no ip route-cache cef
 no ip route-cache
 speed 100
 full-duplex
 crypto map VPN
!
ip classless
ip route 0.0.0.0 0.0.0.0 63.131.12.1
!
ip nat inside source route-map NAT interface FastEthernet0/1 overload
!
access-list 1 permit 207.242.55.128 0.0.0.127
access-list 1 permit 10.81.0.0 0.0.255.255
access-list 23 permit 10.81.0.0 0.0.255.255
access-list 23 permit 10.6.0.0 0.0.255.255
access-list 100 permit ip 10.81.0.0 0.0.255.255 10.6.0.0 0.0.255.255
access-list 100 permit ip 10.81.0.0 0.0.255.255 172.16.0.0 0.0.255.255
access-list 102 deny   ip 10.81.0.0 0.0.255.255 172.16.0.0 0.0.255.255
access-list 102 deny   ip 10.81.0.0 0.0.255.255 10.6.0.0 0.0.255.255
access-list 102 permit ip 10.81.0.0 0.0.255.255 any
route-map NAT permit 10
 match ip address 102
[+][-]07.12.2008 at 06:55AM PDT, ID: 21989089

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[+][-]07.14.2008 at 07:05AM PDT, ID: 21998104

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[+][-]07.14.2008 at 07:44AM PDT, ID: 21998503

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[+][-]07.14.2008 at 08:25AM PDT, ID: 21998913

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[+][-]07.14.2008 at 07:21PM PDT, ID: 22003729

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[+][-]07.15.2008 at 01:34PM PDT, ID: 22010815

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[+][-]07.15.2008 at 07:17PM PDT, ID: 22012822

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[+][-]07.15.2008 at 07:24PM PDT, ID: 22012851

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[+][-]07.15.2008 at 09:44PM PDT, ID: 22013324

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About this solution

Zones: Cisco PIX Firewall, Virtual Private Networking (VPN)
Tags: Cisco, Router, 12.4
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Solution Provided By: rsivanandan
Participating Experts: 1
Solution Grade: B
 
 
 
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