asa remote access vpn hairpinning

What is Hairpinning in VPN?

Hairpin and split tunnel VPN - Cisco Tutorial A hairpin connection is when traffic enters a gateway and the device immediately reroutes the traffic to the internet or another company site, such as in a hub and spoke configuration. We call this configuration hairpin becomes the traffic pattern resembles a hairpin.

What is Hairpinning Cisco ASA?

The Cisco ASA firewall doesn't like traffic that enters and exits the same interface. This kind of traffic pattern is called hairpinning or u-turn traffic.

What is Sysopt connection permit VPN?

The sysopt connection permit-vpn command allows all the traffic that enters the security appliance through a VPN tunnel to bypass interface access lists, while a vpn-filter is applied to postdecrypted traffic after it exits a tunnel and to preencrypted traffic before it enters a tunnel.

Should I allow LAN access when using VPN?

If you need to use Tunnel All and also connect to local resources like servers or printers, then you need to enable local LAN access. The campus VPN server is configured so that if you need to use Tunnel All you can still access your local resources at home like servers and printers.

What is NAT Hairpinning?

NAT hairpinning is a useful technique for accessing an internal server using a public IP. In order to ensure that the flow occurs properly: Both the source and destination IP addresses need to be modified so each device sees the traffic flowing to and from the correct locations.

How do I set up NAT reflection?

To enable NAT Reflection globally:Navigate to System > Advanced on the Firewall & NAT.Locate the Network Address Translation section of the page.Configure the NAT Reflection options as follows:

How can I use local network and VPN simultaneously?

How to: Accessing Local Network Resources While Using VPNStep 1: Open "Network and Sharing Center" ... Step 2: In the window that appears, select “Change Adapter Settings” ... Step 3: A window should appear showing all of your network connections. ... Step 4: Select the "Networking" Tab.More items...

Does VPN affect local network?

There is a security feature in almost all VPN configurations that blocks all local network connections while connected to the corporate network, via a VPN. This is to provide some degree of security by preventing someone with malicious intent from reaching the corporate server using your PC/Laptop as a stepping stone.

Can I use VPN to connect to home network?

In fact, you can set up a VPN server at home. All you need is a little know-how and some free time. You can create your own VPN server at home, allowing you to securely access your home network while you're away. It does require some technical knowledge to set up, though.

What does allow LAN access mean?

The Allow Local LAN Access parameter gives you access to the resources on your local LAN (printer, fax, shared files, other systems) when you are connected through a secure gateway to a central-site VPN device.

What is LAN access on Ipvanish?

Selecting the Allow LAN access feature allows for access to your local networks while the VPN is connected. The Split Tunneling option allows you to select which apps that you would rather have routed through your regular internet connection and not our VPN (For more information, see our Split Tunneling article)

What is LAN traffic?

A local area network (LAN) is a group of computers and peripheral devices that share a common communications line or wireless link to a server within a distinct geographic area.

How do I enable local LAN access on Cisco VPN?

Right click the Cisco AnyConnect client. Left click on Open AnyConnect. Select Advanced Windows. From the Preferences tab, ensure the Allow local (LAN) access when using VPN (if configured), is check.

What is it called when you have VPN traffic entering and exiting the same ASA?

The situation of having VPN traffic entering and exiting the same ASA interface is called VPN Hairpinning (or “ VPN on a stick ”).

What is ASA1 traffic?

On ASA1, you will have traffic from Site2 entering and exiting the same interface (outside interface of firewall). To implement this you must enable “intra-interface” traffic on ASA1, so that traffic can enter and exit the same interface simultaneously.

What is Site1 and Site2?

Two sites connected with IPSEC Site-to-Site VPN over the Internet. Both sites using Cisco ASA firewalls (version 9.x or 8.4). Site1 is the main headquarters site and Site2 is a remote branch site. The LAN networks on each site communicate between them over the IPSEC VPN tunnel.

What IP address is used for VPN interesting traffic?

The ACL used for VPN Interesting Traffic on ASA1 must allow “any IP” towards 192.168.2.0. This is required so that returning traffic from Internet hosts can flow through the VPN tunnel towards Site2.

Why do you need to perform a PAT on ASA1?

On ASA1 you must perform PAT on traffic coming from Site2 so that it can access the internet via its outside interface.

Is Cisco ASA Firewall Fundamentals self published?

He is a self-published author of two books ("Cisco ASA Firewall Fundamentals" and "Cisco VPN Configuration Guide") which are available at Amazon and on this website as well.

Is Cisco ASA Firewall Fundamentals 3rd Edition available on Amazon?

My Book “ Cisco ASA Firewall Fundamentals-3rd Edition ” is now available on Amazon as Paperback physical book. MORE INFORMATION HERE

Why do we need to configure ASA?

We need to configure the ASA to permit traffic that enters and exits the same interface.

Does Cisco ASA firewall allow hairpin traffic?

The Cisco ASA firewall doesn’t like traffic that enters and exits the same interface. This behavior is typically known as “hairpin” or “u-turn”. Sometimes however we need our ASA to permit this kind of traffic. Here’s an example:

What is hub and spoke VPN?

For example, if you have a hub-and-spoke VPN network where the security appliance is the hub and the remote VPN networks are spokes, in order for one spoke to communicate with another spoke traffic must go to the security appliance and then out again to the other spoke.

How to enable SSL VPN on Cisco AnyConnect?

Choose Configuration > Remote Access VPN > Network (Client) Access > SSL VPN Connection Profiles and under Access Interfaces , click the check boxes Allow Access and Enable DTLS for the outside interface. Also, check the Enable Cisco AnyConnect VPN Client or legacy SSL VPN Client access on the interface selected in the table below check box in order to enable SSL VPN on the outside interface.

What is Cisco AnyConnect VPN?

The Cisco AnyConnect VPN Client provides secure SSL connections to the security appliance for remote users. Without a previously installed client, remote users enter the IP address in their browser of an interface configured to accept SSL VPN connections. Unless the security appliance is configured to redirect http:// requests to https://, users must enter the URL in the form https://<address>.

How to add NAT rule to Anyconnect?

Choose Configuration > Firewall > NAT Rules > Add NAT Rule Before "Network Object" NAT Rules so the traffic that comes from the outside network (Anyconect Pool) and it's destined to another Anyconnect Client from the same pool does not get translated with outside IP address 172.16.1.1.

What does the security appliance do when a client is authenticated?

In the case of a previously installed client, when the user authenticates, the security appliance examines the revision of the client and upgrades the client as necessary.

How does a security appliance download client?

The security appliance downloads the client based on the group policy or username attributes of the user that establishes the connection. You can configure the security appliance to automatically download the client, or you can configure it to prompt the remote user about whether to download the client. In the latter case, if the user does not respond, you can configure the security appliance to either download the client after a timeout period or present the login page.

Why assign a completely different pool of IP addresses to the VPN Client?

Note: In order to avoid an overlap of IP addresses in the network , assign a completely different pool of IP addresses to the VPN Client (for example, 10.x.x.x , 172.16.x.x, and 192.168.x.x). This IP addressing scheme is helpful in order to troubleshoot your network.

What is the IP address of ASA?

Above we have a webserver using IP address 192.168.1.2 on our internal LAN. The ASA is configured so that IP address 192.168.2.220 on the outside is translated to IP address 192.168.1.2. This allows users on the Internet to access our webserver.

What is the traffic pattern called in Cisco ASA?

The Cisco ASA firewall doesn’t like traffic that enters and exits the same interface. This kind of traffic pattern is called hairpinning or u-turn traffic.

What command to get ipsec hairpinning working?

For ipsec hairpinning on an ASA the command to get this working is 'same-security-traffic permit intra-interface' .

Do you need a proxy for Dissidente?

Dissidente, you need some type of proxy. I would suggest you setup a work station or server that you and your developer can RDP/VNC/etc into and from it be able to access the hosting site.

Can you split tunnel with hair pin?

You can do split tunnel w/ hair pinning from the ASA . In order to do this, you need to be running at least software version 8.x+ , preferable 8.2.x. Version 8.3 requires a memory upgrade on the ASA.

Does hair pin work with VPN?

1. Hair pinning only works to allow you to go from one vpn tunnel to another from an ASA. No vpn tunnels are configured here between their office and the hosting company. At least none mentioned. That and no way to lock this down to just a couple profiles, its an all or nothing configuration.