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Cisco router IOS (2610) as a VPN Server |
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judithscott
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Joined: 27 January 2009 Online Status: Offline Posts: 2 |
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Topic: Cisco router IOS (2610) as a VPN ServerPosted: 28 January 2009 at 12:04am |
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its very nice information, thank you for giving this information, i will try this.
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lodogg
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Joined: 25 January 2003 Online Status: Offline Posts: 1831 |
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Posted: 24 March 2008 at 12:28pm |
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lodogg
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Joined: 25 January 2003 Online Status: Offline Posts: 1831 |
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Posted: 24 March 2008 at 12:21pm |
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This is a great article on how to configure your Cisco router that is running a Security bundle (IOS) to accept IPSEC tunnels. I have been having some issues with NAT’ing once I’m connected but I will post an update! ! !--- Enable authentication, authorization and accounting (AAA)
!--- In order to enable Xauth for user authentication,
aaa authorization network groupauthor local !--- For local authentication of the IPsec user,
!--- Create an Internet Security Association and
crypto isakmp policy 3
!--- Create the Phase 2 Policy for actual data encryption.
crypto ipsec transform-set myset esp-3des esp-md5-hmac
!--- Create a pool of addresses to be
!--- Enables Network Address Translation (NAT)
!--- The access list is used to specify which traffic access-list 111 deny ip 10.10.10.0 0.0.0.255 192.168.1.0 0.0.0.255
!--- Configure the interesting traffic to be encrypted from the VPN Client access-list 101 permit ip 10.10.10.0 0.0.0.255 192.168.1.0 0.0.0.255 control-plane ~~~~~~
IPsec Diagnostic Tools within Cisco IOS
The most commonly used categories of diagnostic tools used within Cisco IOS are show and debug commands. Throughout the course of this chapter, we will use variations of these two command sets to diagnose issues commonly found within Cisco IOS. As we've discussed, there are detailed steps that occur during the formation of Internet Security Association and Key Management Protocol (ISAKMP) and IPsec negotiation between two IPsec VPN endpoints. We will examine common errors in these steps through execution of the following debugging commands within IOS: • debug crypto isakmp • debug crypto IPsec Additionally, we will explore several show commands necessary to uncover common errors and performance issues related to the negotiate of IPsec VPN tunnels, including fragmentation/maximum transmission unit (MTU) issues, quality of service (QoS) issues, Network Address Translation (NAT) issues, and issues relating to recursive routing. A subset of the commands we will discuss to address these issues includes:
• show crypto isakmp sa • show crypto isakmp sa nat • show crypto IPsec sa • show crypto engine connections active • show crypto engine connections dropped-packet • show crypto engine connections flow • show crypto engine qos |
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