How Do I... Configure SonicWALL VPN Connections?

Configure Remote Access as a VPN Server

A NAS is a device that provides some level of access to a larger network. If prompted, click Yes to confirm restarting the server and click Close to restart the server. From all the above, split tunneling is the most common configuration of Cisco VPN configuration today, however for educational purposes, we will be covering all methods. At this point, the Cisco VPN configuration is complete and fully functional. That is quite a task indeed! You can prefer the ExpressRoute path by setting higher local preference for the routes received the ExpressRoute. In this case, all traffic is tunnelled through the VPN and there's usually a web proxy that will provide the remote client restricted Internet access.

Limits and limitations

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A maximum of 5 users are allowed to connect simultaneously to this group and will have access to the resources governed by access-list Creation of the Phase 2 Policy is next. Note the encryption and authentication method of our IPSec crypto tunnel as shown by a connected VPN client to the router with the above configuration:.

Now its time to start binding all the above together by creating a virtual-template interface that will act as a 'virtual interface' for our incoming VPN clients. Remote VPN clients will obtain an IP address that is part of our internal network see diagram above - Setting an interface as an ip unnumbered enables IP processing through it without assigning an explicit IP address, however you must bind it to a physical interface that does have an IP address configured, usually your LAN interface:.

Above, our virtual template also inherits our configured encryption method via the ' ipsec profile VPN-Profile-1 ' command which sets the transform method to ' encrypt-method-1 ' check previous configuration block which in turn equals to ' esp-3des esp-sha-hmac '.

Notice how Cisco's CLI configuration follows a logical structure. You configure specific parameters which are then used in other sections of the configuration. If this logic is understood by the engineer, then decoding any given Cisco configuration becomes an easy task. So far we've enabled the authentication mechanisms aaa , created an ISAKMP policy, created the VPN group and set its parameters, configured the encryption method transform-set and binded it to the virtual template the remote VPN user will connect to.

Last step is the creation of our access lists that will control the VPN traffic to be tunnelled, effectively controlling what our VPN users are able to access remotely. Once that's done, we need to add a 'no NAT' statement so that traffic exiting the router and heading toward the VPN user is preserved with its private IP address, otherwise packets sent through the tunnel by the router, will be NAT'ed and therefore rejected by the remote VPN Client.

When NAT is enabled through a VPN tunnel, the remote user sees the tunnelled traffic coming from the router's public IP address, when in fact it should be from the router's private IP address. Based on the above, we proceed with our configuration. Note that for access-list , we could either ' deny ip host Denying your whole network the NAT service toward your remote clients, will make it easier for any future additions. If for example there was a need to deny NAT for another 5 servers so they can reach remote VPN clients, then the access-list would need to be edited to include these new hosts, where as now it's already taken care of.

Remember, with access-list we are simply controlling the NAT function , not the access the remote clients have done with access-list in our example. At this point, the Cisco VPN configuration is complete and fully functional. We mentioned in the beginning of this article that we would cover split tunneling and full tunneling methods for our VPN clients.

You'll be pleased to know that this functionality is solely determined by the group's access-lists, which our case is access-list If we wanted to tunnel all traffic from the VPN client to our network, we would use the following access-list configuration:. In another example, if we wanted to provide our VPN clients access to networks When the VPN client connects, should we go to the connection's statistics, we would see the 3 networks under the secure routes, indicating all traffic toward these networks is tunnelled through the VPN:.

That is quite a task indeed! To help cut down the configuration to just a couple of lines, this is the alternative code that would be used and have the same effect:.

The access-list tells the router to tunnel all traffic from the three networks to our VPN clients who's IP address will be in the Even replacing the ' As a last note, if it was required the VPN clients to be provided with an IP address range different from that of the internal network e. This article explained the fundamentals of Cisco's VPN client and features it offers to allow the remote and secure connection of users to their corporate networks from anywhere in the world.

We examined the necessary steps and commands required on a Cisco router to setup and configure it to accept Cisco VPN client connections. Detailed explanation was provided for every configuration step, along with the necessary diagrams and screenshots.

Split tunneling was explained and covered, showing how to configure the Cisco VPN clients access only to the required internal networks while maintaining access to the Internet.

SonicWALL firewalls also power effective VPN connections, providing secure remote access for everyone from mobile employees to executive staff. Essentially, there are three steps to the process: Follow these steps to configure the end user client:. Can Russian hackers be stopped? Here's why it might take 20 years. How driverless cars, hyperloop, and drones will change our travel plans. How labs in space could pave the way for healthcare breakthroughs on Earth. We deliver the top business tech news stories about the companies, the people, and the products revolutionizing the planet.

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Click on the VPN button. Specify whether you wish to use a default key or use a preshared key. Make a note of the preshared key if you select that option, then click Next.

Install Remote Access as a RAS Gateway VPN Server