ipsec book

IPSec is a relatively complete system of VPN technology, which provides a series of protocol standards. If you do not delve into the overly detailed content of IPSec, we understand IPSec in general terms as follows. VPN National standard: Standard-setting unit: Huawei Technology Co., Ltd., ZTE, Deep convinced Technology Co., Ltd., Wuxi Jiangnan Information Secu

Many people asked me how to implement the IPSec VPN Technology Based on the router. I used this case to explain how to configure an IPSec VPN based on the router. Due to work requirements, it is required to establish a VPN connection between the company's Nanjing office and the Shanghai office. Network settings of Nanjing Office: Intranet IP address 10.1.1.0/24, Internet IP address 202.102.1.5/24, Intranet

Today, we will demonstrate how the Juniper SRX Firewall runs ipsec vpn + OSPF with Cisco routers. Topology: 650) this. width = 650; "src =" http://img1.51cto.com/attachment/201309/133822237.png "title =" 1.PNG" alt = "133822237.png"/> R1 simulates a cisco device, which is equivalent to a branch site. R2 simulates a carrier device, C1 is a zhuyun device, and bridging with SRX, which is equivalent to a firewall headquarters.) R3 simulates internal route

1. Simple Communication topology:Use the Windows platform as a gateway to turn on IPSec and Nat at the same time to support private and public communication.Note: There is no NAT between IPSec Gateway and Client1 IPSec, otherwise it is the second case. is irrelevant to the descriptive narrative of this article. This article is just a work note. Does not mean any

R6 Router GRE partial configurationEnConfig TNo IP domain-lookupIP classlessIP Subnet-zeroHost R6Interface Loopback 0IP address 10.1.1.1 255.255.255.0Interface Serial 1/2IP address 173.16.1.1 255.255.255.252No shutdownint FA 2/0IP addr 11.0.0.1 255.0.0.0No shutdownInterface Tunnel 0IP unnumbered serial 1/2Tunnel Source Serial 1/2Tunnel Destination 173.16.1.2No shutExitIP Route 0.0.0.0 0.0.0.0 173.16.1.2IP Route 10.2.2.0 255.255.255.0 tunnel0EndShow IP routeR7EnConfig TNo IP domain-lookupIP class

Tutorial topology: Topology analysis:Consists of four routes. The e0/1 ports of R1 and R4 simulate pc1 and pc2R2 and R3 simulate the InternetPurpose:The two ends of the LAN can communicate with each other and can run dynamic routing protocols;Encryption of LAN traffic at both ends;LAN at both ends can access the InternetExperiment Analysis:Use IpSec to encrypt traffic at both endsIf the LAN can run the dynamic routing protocol, GRE must be run on the

#Script forchanging IPSEC address when DNS changes. #Script'll iterate through all peers looking forAddr_inchThe comments. It'll then#check forChangesinchThe IP forThat DNS nameifThe IP address differs it'll modify the peer# asWell asAny policy with the old IP address asWell . #TODO ADD Log Entries forchanges. #TODO Setup Netwatch Entries forEach tunnel:local ipsecpeer;:local"Vpn-interface-name";: Local"Vpn-dns-name";: Local"Current-vpn-ip";: Local"Ne

Many people ask me how to implement IPSec VPN technology, and I've done a case to show you how to configure a router-based IPSec VPN. Due to work needs, the company's Nanjing office and the Shanghai office to establish a VPN connection. Nanjing Office Network settings: Intranet IP 10.1.1.0/24, extranet IP 202.102.1.5/24, Shanghai office network settings: Intranet IP 10.1.2.0/24, external network IP 202.102

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