Aug 13, 2016
Jun 29, 2015 VPN — IPsec — Connecting to Cisco IOS Devices with IPsec It may also be necessary to tell Cisco IOS not to NAT the traffic that is destined for the IPsec tunnel. There are several ways to accomplish this, depending on how the router has NAT configured. If the following example does not help, there are several examples that turn up in a Google search for “cisco ios nonat ipsec”: Configuration Example: IPsec VPN between a FortiGate unit This configuration example is a basic VPN setup between a FortiGate unit and a Cisco router, using a Virtual Tunnel Interface (VTI) on the Cisco router. The IPsec configuration is only using a Pre-Shared Key for security. XAUTH or Certificates should be considered for an added level of security. Only the relevant configuration has been included. In IPSec tunnel mode, the entire original IP datagram is encrypted, and it becomes the payload in a new IP packet. This mode allows a network device, such as a router, to act as an IPSec proxy. That is, the router performs encryption on behalf of the hosts. The source router encrypts packets and forwards them along the IPSec tunnel. The Split tunneling allows the VPN users to access corporate resources via the IPsec tunnel while still permitting access to the Internet. Prerequisites Requirements. There are no specific requirements for this document. Components Used. The information in this document is based on a Cisco 3640 Router with Cisco IOS ® Software Release 12.4.
Apr 08, 2017
VPN Interface IPsec for vEdge Routers - Viptela Documentation
My deployment requires use of 2 ASAs for VPN tunnel redundancy where each ASA forms a VPN tunnel with a remote VPN device via different ISP and carries GRE tunnel inside each VPN tunnel. The router where GRE tunnels terminate runs BGP for selection of path to reach the side via one of the GWs. ASA1 (VPN1) <=> ISP1
Router#show int tunnel0 Tunnel0 is up, line protocol is up Hardware is Tunnel Internet address is 172.16.0.1/30 MTU 17886 bytes, BW 100 Kbit/sec, DLY 50000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive not set Tunnel source 1.1.1.1, destination 1.1.1.2 Tunnel protocol/transport IPSEC/IP Summary: This article presents an example configuration of an IPSec VPN tunnel between a Series 3 CradlePoint router and a Cisco ASA. Requirements: CradlePoint model MBR1400, IBR600, IBR650, CBR400, or CBR450. If you are unsure of your CradlePoint Series or Model number, please click here. Cisco ASA running software 8.4 or newer Jun 29, 2015 · The Cisco CSR 1000v instance is also behind NAT, therefore the configuration is slightly more complex than what we may be used to and require the use of the IPsec Tunnel mode and the NAT-T capability. To establish the secure IPsec sessions I decided to use the latest iteration of the Internet Key Exchange protocol, namely IKEv2. It may also be necessary to tell Cisco IOS not to NAT the traffic that is destined for the IPsec tunnel. There are several ways to accomplish this, depending on how the router has NAT configured. If the following example does not help, there are several examples that turn up in a Google search for “cisco ios nonat ipsec”: