openswan ipsec

NAT and ipsec vpn of link Balancing Devices (1) when implementing a new link Load Balancing Project, the user's previous egress devices are usually firewalls, if the organizational structure of a user is distributed, it is often necessary to build a security tunnel to communicate with the headquarters or branches over the internet through the ipsec vpn. In this case, the firewall is used as an egress device

When implementing a new link Load Balancing Project, users often use firewalls as their egress devices. If the user's organizational structure is distributed, it is often necessary to build a security tunnel to communicate with the headquarters or branches over the internet through ipsec vpn. In this case, the firewall is responsible for the maintenance of the ipsec vpn tunnel in addition to serving as the

Install Strongswan: an IPsec-based VPN tool on Linux IPsec is a standard that provides network layer security. It contains Authentication Header (AH) and security load encapsulation (ESP) components. AH provides the integrity of the package, and the ESP component provides the confidentiality of the package. IPsec ensures security at the network layer. Confident

Many people do not quite understand the meaning of configuring IPsec statements. The following describes the problem in detail. With the increasing popularity of Internet, the low cost of Internet access has prompted more and more enterprises to use VPN to achieve remote connection. Compared with traditional WAN connections such as leased lines, frame relay, and ATM, VPN not only has much lower cost, but also has no less security. Today we will mainly

Experiment content of Dynamic IPsec VPN in a star network: 1. Create a fully interconnected topology. 2. Take R1 as the center, so that R2 and R3 establish a neighbor relationship with R1 respectively, while the routes between R2 and R3 are not reachable. 3. Create a Dynamic IPsec VPN R1 # show run !! Crypto isakmp policy 100 hash md5 authentication pre-share group 2 lifetime 3600 crypto isakmp key ilovetg

In the previous article, the experimental environment was built. The protocol analysis can be performed once the IKE/IPSEC protocol is fully run and the relevant output and capture packets are collected. During the analysis, we will use the output of the IKE process and the Wireshark grab packet, combined with the relevant RFC, using Python to verify the calculation. First look at the full operation of the Protocol (filtering out irrelevant messages,

This document describes the IPSec configuration between the router and the Cisco firewall. The traffic between the headquarters and the branch office uses the private IP address, when the branch's local area network user accesses the Internet, needs to carry on the address conversion. Network topology Configuration Define the traffic to the router: Access-list IPSec permit IP 10.1.1.0 255.255.255.0 10.2.2.0

GRE over IPSEC route configuration r1 (0/0) --- r2 -- (1/1) r3 GRE over IPSEC first ipsec solves the problem that ipsec cannot transmit multicast traffic in gre, that is, you can run the Routing Protocol in ipsec, and the protocol is encrypted !! R1: crypto isakmp policy 10

Internet Key Exchange (IKE)Before the two IPSec computers exchange data, they must first establish an agreement called "Security Association ", both parties need to reach an agreement on how to protect information, exchange information, and other public security settings. More importantly, there must be a way for the two computers to securely exchange a set of keys, for use in their connections. See Figure 7.Figure 7 Internet Key ExchangeIKE (Internet

Internet Key Exchange (IKE)Before exchanging data between two IPSec computers, a convention must be established first, a convention called a "security association", in which both parties need to agree on how to protect the information, exchange information, and other common security settings, and more importantly, there must be a way for the two computers to securely exchange a set of keys. For use in their connections. See figure Seven. Figure VII, I

1 Introduction With the rapid development of public networks such as internet and the development trend of international economic integration, there is more and more demand for the transmission of information through network between enterprises. How to guarantee the safety and efficiency of communication at the lowest cost is an issue of great concern to enterprises. The popular solution is to use tunneling technology to establish secure virtual private networks, the virtual private network (VP

md5Authentication pre-shareCrypto isakmp key tom address 200.1.1.2Crypto ipsec transform-set tim esp-3des esp-md5-hmacAccess-list 101 permit ip 192.168.1.0 0.0.255 192.168.2.0 0.0.255Crypto map tom 10 ipsec-isakmpSet peer 200.1.1.2Set transform-set timMatch address 101Interface FastEthernet0/0Ip address 192.168.1.254 255.255.255.0No shutdownInterface FastEthernet0/1Ip address 100.1.1.2 255.255.255.0No shut

192.168.0.2 255.255.255.0// Configure the ip address and the peer address in a subnet.Tunnel source 202.100.2.3 // local egress addressTunnel destination 202.100.1.1 // public IP address of the Peer endInterface FastEthernet0/0Ip address 202.100.2.3 255.255.255.0Router ospf 110Router-id 192.168.0.2Log-adjacency-changesNetwork 192.168.0.2 0.0.0.0 area 0Network 192.168.5.1 0.0.0.0 area 0Network 192.168.6.1 0.0.0.0 area 0Ip route 0.0.0.0 0.0.0.0 202.100.2.2 Gre over

I. Overview:IPSec VPN has a variety of methods through NAT, NAT-T is one of them. Generally, IPSec VPN cannot cross the NAT device because the ESP traffic does not have a port number as the TCP or UDP traffic does. When the first phase of the test of IPSec VPN is aggressive-mode, it is not intended to appear in the PIX/ASA by default if the NAT-T is not enabled, ipsec