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PPTP VN with Cisco 837 ADSL router

Posted on 2010-08-30
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Last Modified: 2012-06-21
Anyone have experience  with PPTP VPN terminated in Cisco ADSL Router 837.
Give me the exact feature IOS set needed.
Please help
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Question by:anishpeter
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arnold earned 500 total points
ID: 33560980

There are some pitfalls including some retail (home routers) have issues with pptp. The home router must have VPN passthrough to include GRE (protocol 47)

http://www.ifm.net.nz/cookbooks/827_fw_pptp_nz.html
http://www.cisco.com/en/US/docs/routers/access/800/820/software/configuration/guide/advconf.html
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by:anishpeter
ID: 33565029
Hi.. Arnold,
Ok.  Now I understand only cisco 857 avilable.  Any configuration experience for this?
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by:arnold
ID: 33567543
The examples above provide you with detailed explanation.  Could you explain what is the issue you are having? i.e. you configured the PPTP and the client connects but has problems accessing the Internet?
This deals with a PPTP connection having the option to use the PPTP connection as the default gateway.  removing this check would only send traffic destined to the LAN behind the Cisco while all other traffic will be sent through the local Internet connection.
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by:anishpeter
ID: 33573822
I have yet to purchaise the router.
Has confusion in Loobback interface configuration and unnumberd interface. Is this same for 857 series or VLAN interface has to be configurared or external ATM interface has to be used for unnumbered interface. Please clarify.

Thanks,
Anish
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by:arnold
ID: 33573931
I do not understand what you are asking?
You can find many configuration examples on cisco's site www.cisco.com
as well as using your favorite search engine.
ATM has to be used for the DSL connection configuration.
http://www.cisco.com/en/US/docs/routers/access/800/850/software/configuration/guide/pppoanat.html

You could check with the dealer through whom you are planning to buy to make sure the equipment you are buying meets your needs/operations.

VLAN has a conflicting response.
https://supportforums.cisco.com/message/812652
http://www.petri.co.il/forums/showthread.php?t=32674
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by:anishpeter
ID: 33575312
Hi.. Arnold,
The link  you provided, http://www.ifm.net.nz/cookbooks/827_fw_pptp_nz.html   is very good configuration, but is for 837 routers.
In that configuration, have lines like this
 interface Loopback0
 ip address 192.168.3.254 255.255.255.0
  and this interface used as unnumbered interface as per line below

interface Virtual-Template1
                      ip unnumbered Loopback0
                      peer default ip address pool pptp

But I dont think, new routers like 857 has different configution using VLAN interface.   I was asking, whether you have any idea bout the same for cisco 857
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Expert Comment

by:arnold
ID: 33575453
Have you checked with those from whom you are planning on purchasing the device whether it can do what you need?

You are asking a question without providing what your needs are.
The 837 has subinterfaces.

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by:anishpeter
ID: 33583609
I accept the solution you provided the second reply.  Thanks for the reply.
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