The situation of having VPN traffic entering and exiting the same ASA interface is called VPN Hairpinning (or “VPN on a stick”). Scenarios like the above are useful in situations where you want to have centralized control of all Internet access (for hosts in the main site and for hosts in remote branch sites as well).
This removes the need for a hairpin through the VPN/corporate network for general browsing traffic, whilst still allowing central security control. Even with these solutions in place however, Microsoft still strongly recommends that Optimize marked Office 365 traffic is sent direct to the service. NAT Hairpin Hello, I need inside hosts to access (from the inside network) by the Wan IP (external IP) an inside (mapped) IP. This is known as NAT hairpinning or NAT reflection. I did not find any document about this in fortinet. Others vendors support it. Can anyone point me to a configuration? Thanks in advance. This causes the traffic between the local LAN hosts and the remote private network to take what amounts to a 'detour' through the firewall and make a 'hairpin' turn. This fix only works if the traffic is always being originated from the local LAN segment. If the remote network needs the capability to initiate connections to the local network Note: You could ‘hairpin’ multiple sites over this one tunnel, but that’s not ideal. Route Based. These were typically used with routers, because routers use Virtual Tunnel Interfaces to terminate VPN tunnels, that way traffic can be routed down various different tunnels based on a destination, (which can be looked up in a routing table The ASA supports a feature that lets a VPN client send IPsec-protected traffic to another VPN user by allowing such traffic in and out of the same interface is called “hairpinning”, this feature can be thought of as VPN spokes (clients) connecting through a VPN hub (Cisco ASA firewall). With a Hair Pinned VPN the original remote VPN will still work, but we can also send and receive traffic to the remote site, over the same VPN. Prerequisites. 1. All firewalls must be Cisco ASA or PIX 500 Version 7 or above (sorry no PIX 501’s or 506E’s). 2. The sites in question must already be connected by a site to site VPN.
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. In the first hairpin example I explained how traffic from remote VPN users was dropped when you are not using split horizon, this time we will look at another scenario.
A VIP, also known as port forwarding, is set up to allow external users to access an internal server. The VIP will take traffic sent to a public IP address and forward it to an internal IP address, such as the server’s private IP. The following hair-pinning scenario uses the situation where the VIP is associated to “any” interface. Scenario:
Hotspot Shield is an awesome free VPN that has helped millions of people in their time of need. It was the most used VPN during Asa Anyconnect Vpn Hairpin the Turkey coup and the Arab Spring. Users get free access not only to the VPN but also a Chrome extension.
The ASA supports a feature that lets a VPN client send IPsec-protected traffic to another VPN user by allowing such traffic in and out of the same interface is called “hairpinning”, this feature can be thought of as VPN spokes (clients) connecting through a VPN hub (Cisco ASA firewall). With a Hair Pinned VPN the original remote VPN will still work, but we can also send and receive traffic to the remote site, over the same VPN. Prerequisites. 1. All firewalls must be Cisco ASA or PIX 500 Version 7 or above (sorry no PIX 501’s or 506E’s). 2. The sites in question must already be connected by a site to site VPN. In order for the traffic to leave correctly, you need to add a NAT for the vpn pool. It will look something like this" nat (outside) 1 192.168.10.0 255.255.255.0 " This NAT's your VPN traffic to the outside global ip allowing the once exsisting vpn traffic to be routed correctly on the internet. Note - Internal Host Detection uses a reverse lookup to determine whether or not a device is on the internal network in order to establish a VPN tunnel. See this post for additional details if you do not have an internal DNS server.