Aug 25, 2011 · Jagadeesh Tammera, a Content Engineer for Cisco specializing in Security/VPN domain, explains how hair-pinning works on Cisco ASA and some of its real-time implementations. For more information on
Jun 20, 2014 · This document describes how to set up a Adaptive Security Appliance(ASA) 8.0.2 to perform SSL VPN on a stick with Cisco AnyConnect VPN client. This setup applies to a specific case where the ASA does not allow split tunneling, and users connect directly to the ASA before they are permitted to go to the Internet. However, with this version the intra-interface-parameter was only functional for vpn-traffic, for example traffic from an outside vpn-client destined to internet (full tunneling). ver 7.2. Beginning with v7.2 the “same-security permit-intra-interface”-command becomes useful and can be used for other traffic than vpn-initiated. Now we can do Traffic between Branch 1 and Branch 2 should be able to talk across the existing IPSec VPN on headquarters ASA (HQ). Concepts : Hairpinning (U-turn Traffic): Hairpinning is a term to describe traffic that is routed out of the same interface from which it entered. When traffic is destined for 192.168.30.1 with a source IP of 2.2.2.20 on the outside interface translate the destination address to 192.168.30.1. Note : You will need to ensure the NAT policies are ordered so that the source translation is first, followed by the destination. 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.
Introduction This document provides a sample configuration for setting up the ASA (running 8.3 or later) to hairpin/u-turn traffic off its interface. Requirements Ensure that you meet these requirements before you attempt this configuration: ASA is running 8.3 code or later. Network
Nov 14, 2018 · Enable hairpin for non-split-tunneled VPN client traffic: same-security-traffic permit intra-interface ! Enable management access on inside ifc: management-access inside ! Identify local VPN network, & perform object interface PAT when going to Internet: object network vpn_local subnet 10.3.3.0 255.255.255.0 nat (outside,outside) dynamic Hairpin refers to telephone systems and the process of sending a call back in the direction of its point of origin. If a call cannot be directed over Internet Protocol to a gateway closer to the target telephone, the call is often redirected back to the local zone, which is the direction of its origination. 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. 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 the Optimize marked Office 365 traffic is sent direct to the service.
I have an XG-7100 with IPSEC VPN to two other sites, as well as Azure; call them Main, North, South and Azure. I've observed: bi-directional traffic between North LAN and Main LAN bi-directional traffic between South LAN and Main LAN bi-directional traff
Jun 20, 2014 · This document describes how to set up a Adaptive Security Appliance(ASA) 8.0.2 to perform SSL VPN on a stick with Cisco AnyConnect VPN client. This setup applies to a specific case where the ASA does not allow split tunneling, and users connect directly to the ASA before they are permitted to go to the Internet. However, with this version the intra-interface-parameter was only functional for vpn-traffic, for example traffic from an outside vpn-client destined to internet (full tunneling). ver 7.2. Beginning with v7.2 the “same-security permit-intra-interface”-command becomes useful and can be used for other traffic than vpn-initiated. Now we can do Traffic between Branch 1 and Branch 2 should be able to talk across the existing IPSec VPN on headquarters ASA (HQ). Concepts : Hairpinning (U-turn Traffic): Hairpinning is a term to describe traffic that is routed out of the same interface from which it entered. When traffic is destined for 192.168.30.1 with a source IP of 2.2.2.20 on the outside interface translate the destination address to 192.168.30.1. Note : You will need to ensure the NAT policies are ordered so that the source translation is first, followed by the destination. 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 network hairpin happens when WAN or VPN traffic bound for a particular destination is first directed to another intermediate location (such as security stack, cloud access broker, of cloud based web gateway), introducing latency and potential redirection to a geographically distant endpoint.