Question

Cisco 800 Series Site to Site VPN

Asked by: PeteLong

Hi All

Quick Question, Ive got to deploy some Cisco 877 ADSL routers and Throw in site to site VPN's back to the clients main site which has an ASA5500.

Im happy enough doing the ASA, Ive done plenty, but Ive never deployed one of these little Routers before so Ive got a few questions........

1. Am I correct in thinking that these things are configured with the SDM (I know I can get CLI on them as well)
2. Ive never configured an ASDL connection on a Router - can this be done with the SDM? Is it simple to do? what details will I need? Anyone have any good links or info?
3. Can IPSEC VPN's be configured from SDM (they will have the appropriate K9 OS in them) or am I better at CLI? whats is default VPN settings (IE 3DES,SHA,DH2 with PFS etc)

Any other info you can provide to help me out will be much appreciated.

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Asked On
2009-01-09 at 03:49:24ID24038070
Tags

Cisco Router 877 ADSL VPN ASA

Topic

Network Routers

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: equalizerPosted on 2009-01-09 at 06:27:15ID: 23335711

Dear PeteLong;

CLI is always better than all other configuration tools. You can see what is happening. you may find 3DES site-to-site ipsec configuration example for 800 series router.
After configuration you can check state with below command.

Show crypto session 


crypto isakmp policy 1
 encr 3des
 authentication pre-share
crypto isakmp key x address  {peer ip address}
!
!
crypto ipsec transform-set TS_IPSEC esp-3des esp-md5-hmac
!
crypto map VPN_IPSEC 10 ipsec-isakmp
 set peer {peer ip address}
 set transform-set TS_IPSEC
 match address 101
!
interface Ethernet0
 ip address 192.168.0.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
interface Dialer1
 ip address negotiated
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer pool 1
 ppp chap hostname x@kcinternet
 ppp chap password 7 x
 crypto map VPN_IPSEC
 
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip nat inside source list 100 interface Dialer1 overload
!
access-list 100 deny   ip 192.168.0.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 100 permit ip 192.168.0.0 0.0.0.255 any
access-list 101 permit ip 192.168.0.0 0.0.0.255 192.168.1.0 0.0.0.255
!
                                              
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by: equalizerPosted on 2009-01-09 at 06:28:08ID: 23335715

Also i put with NAT operation that it shol give some isdea to how they can work together,.

 

by: ChopperCenturyPosted on 2009-01-09 at 06:34:32ID: 23335769

The SDM does ship by default on the flash of an 877.
Here are some config guides on SDM; not specific to 877 but should work the same.
http://www.cisco.com/en/US/products/sw/secursw/ps5318/prod_configuration_examples_list.html
As for configuring the DSL connection, I'm not sure that you can do everything you might need thru the SDM.


 

by: PeteLongPosted on 2009-01-09 at 09:09:39ID: 23337669

Thnaks for the help so far guys :)

20120131-EE-VQP-002

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