Cisco ASA Remote Access VPN

Configuration

How to configure Site to Site VPN on a Cisco ASA
However, your users would be restricted from using the internet. I read somewhere that the ASA had to be at 9. After the instance is running, get its private IP address for example, You'll replace these example values with the actual values from the configuration information that you receive. I followed the Cisco advice at this link: We come from the inside interface, so that's where the statement should be. Facing a tech roadblock?

Table of Contents

Sample configuration: Cisco ASA device (IKEv2/no BGP)

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Ask your question anytime, anywhere, with no hassle. Go Premium Individual Business. I want to check the status of the site-to-site tunnels and verify they are UP. I ran sh crypto isakmp sa, can someone explain the output of below is? Microsoft Legacy OS 1. Windows Server 1. Solutions Learn More Through Courses. Experts Exchange Solution brought to you by Enjoy your complimentary solution view.

Get every solution instantly with Premium. Start your 7-day free trial. When done he can disconnect the VPN connection. You configure both devices to setup a tunnel with each other. The whole remote office can now use this tunnel at the same time whereas with remote access VPN only the pc on which the tunnel is setup can use the tunnel to access resources on the main office.

Since the devices keep the tunnel up, the tunnel usually stays up always. This is the VPN I want to discuss in this article. The tunnel setup occurs in 2 phases. This connection is then used to pass the keys over to the other device. Those keys are then used to setup phase 2 of the tunnel, the IPSec. IPSec is the secure connection over which all data traffic is sent. In order to do this I will create a situation which I will use for future reference. Consider a company with a user main office.

The corporate LAN network is This company recently expanded and a branch office with 10 users is opened in another city. This office has 10 pc's and no servers. They have an Internet connection available and for security purposes an ASA has been installed as a firewall. The branch office LAN is Here's a visual display of a small network setup: I have used the 1. Please note that these are real addresses and actually belong to real people.

Please don't use them outside of a lab environment. The company wants the branch office connected to the main office using site to site VPN. If not, you can post to the forums and the experts will gladly help you get to that point. If they are you are usually well underway. Next, make sure that your NAT exempt access-list is actually referenced see under the NAT0 chapter , that your crypto map is correctly applied to an interface see the crypto map chapter and that isakmp is globally enabled see the isakmp policy chapter.

I will now cover all the separate steps one by one and try to give an explanation of what each part does and what it should look like. They order in which I reference the different commands is not necessarily the best order to configure a VPN tunnel. I've chosen this order because this is the order in which it will appear in a config, hopefully making it easier when troubleshooting to step by step go through your config and see if all is setup correctly. The traffic which goes through is called "interesting traffic".

You create this selection using an access-list. On a site to site VPN you configure both sides of the tunnel. Be aware that you create an access-list on each side and that they actually mirror each other. On the first site you tell the ASA you want to tunnel traffic from the main site to the branch office. On the other you are on the branch site so you tell the ASA to tunnel traffic from the branch site to the main site. It might seem obvious, but it's quite often overlooked.

Let's create the commands to see how it looks: All other traffic will not be treated as interesting for the tunnel and will proceed the normal way through the ASA. Now let's look at the access-list that you would use on the branch site: Of course this is just the actual defining of interesting traffic.

It is not yet related to an action at this point. The ASA will select the traffic as you specify and then shrug and just let it pass as usual. We will define an action to the selection later on when configuring the crypto map. As you have most likely setup some kind of NAT for your Internet connection and the like you will need to exempt the traffic which needs to go through the tunnel from being NATted.

To do this we will again use an access-list: We now need to tell the ASA what to do with the traffic it sees. In this case we create a statement to do "NAT0". We come from the inside interface, so that's where the statement should be. Then you provide a number where you would normally put the pool number of the global that you define on the other side. We reference the access-list we created earlier. Let's do the same for the branch site: And at this point we haven't even configured phase 1 yet!

I still like to adhere to this order as it won't matter when configuring and it will hopefully make troubleshooting easier.

That is a restriction on all ASAs, and it is by design. I configured my "inside" interface for "management-access", so i can ssh to the ip address of the inside interface to access may ASA from internet, while the outside interface has a private ip address, which i natted by the DSL-router to a dynamic public ipv4 address.

I can't establish a remote-access VPN to the inside interface from outside, even if the inside interface is configured for "management-access".

It simply does not work according to my tests. Please enter a title. You can not post a blank message. Please type your message and try again. Feb 16, 8: Note the IKEv1 keyword at the beginning of the pre-shared-key command. This content has been marked as final. Site A config should be tunnel-group Hi all, thank you for you advice.

1. [Introduction] --------------------

Cisco ASA Series—Secure Remote Access: Profile and Benefits. Deployment flexibility: Extends the appropriate remote-access VPN technology, either clientless or full network (SSL/TLS, DTLS, IPsec IKEv1 or IKEv2) access, on a per‑session basis, depending on the user group or endpoint accessing the network, its security posture, . The remote user requires the Cisco VPN client software on his/her computer, once the connection is established the user will receive a private IP address from the ASA and has access to the network. The Cisco VPN client is end-of-life and has been replaced by the Cisco Anyconnect Secure Mobility Client. The remote user will use the anyconnect client to connect to the ASA and will receive an IP address from a VPN pool, allowing full access to the network. In this lesson we will use clientless WebVPN only for the installation of the anyconnect VPN client.