This article compares the IPSec VPN and ssl vpn technologies in detail, so that users from all walks of life can better understand the VPN technology and select the appropriate VPN product.
Another VPN implementation technology different from the traditional VPN is the use of SSL-based VPN. This SSL-based VPN provides security similar to IPSec VPN. Because of the IP
1. Go to the website http://sourceforge.net/projects/ipsec-tools/download the latest IPSec tool 0.8 source code compressed package
2. decompress the package and run the./configure command.
3. Make
4. Make install
Complete
3. Many errors will be prompted during the make process. refer to the following solution:
1. Checking OpenSSL version... too old
Configure: Error: OpenSSL version must be 0.9.6 or highe
SSL: Specifies a Data Security score between the Application Protocol (HTTP, telnet, nntp, FTP) and TCP/IP.
Layer mechanism. Provides data encryption, server authentication, message integrity, and optional client authentication for TCP/IP connections.
.Difference between SSL and TLS: TLS can be seen as an upgraded version of SSL. The main difference is that the supported encryption algorithms are different.
SSH: SSH is a protocol used for secure remote login and other security network services o
H3C MSR20 series router ipsec vpn settings H3C MSR20 series router ipsec vpn settings (the peer end is consistent except the IKE name and ACL data flow direction), local ADSL access mode, access www.2cto.com [ruby] version 5.20, Release 2207P02, basic # sysname testvpn # ike local-name testvpn ike sa keepalive-timer timeout 28800 # domain default enable system # telnet server enable # dar p2p signature-file
The IPSec VPN realizes the network expansion, the firewall realizes the control and the filtering to the network traffic, therefore has the influence to the IPSec VPN communication.
The default ASA maintains a state session only for UDP/TCP traffic, and therefore discards the ESP traffic that is returned. There are two ways to solve the problem
One uses ACLs to release ESP traffic.
Two applications check
Implementation Method:1. The company's computer automatically obtains a fixed ip address on the DHCP server based on the mac address. The dns points to the company's dns server, and the dns server can forward dns queries.2. the dns server and the Domain Server are on the same server.3. The company has an application-level firewall, adding a policy that only the dns server can access the udp port 53 of the internet dns.4. Using ip Security Policies, you can only access the udp53 port of the dns s
The example in this article describes how Python enables IPSec to open permissions. Share to everyone for your reference. The implementation methods are as follows:
Windows's own command-line tools netsh ipsec static add filter does not support bulk additions, and duplicate rules are added. I wrote Ipsecset in Python to solve the above problems, support batch add, the same list to avoid duplicate rules.
I
found that the remote connection can not be connected, and then looked at the next 3389 is normal to open, and the Terminal Services service is also open, and later looked at the server other server situation, saw a firewall with Windows (Windows firewall/ Internet Connection Sharing (ICS) service.So in PR under the use of net stop sharedaccess command after shutting down the firewall found still not normal connection, and then see the server has opened the
This document describes the configuration of subnet overlapping IPSec VPN for all fortigate devices. When you configure VPN interconnection, you need to use NAT for address translation if the subnets on both ends overlap but cannot change any one end of the network to allow VPN connectivity. It is not recommended to use overlapping addresses at both ends of the VPN.
Environment Introduction:
This article uses fortigate500a, fortigate310b to do the d
The concept of things here no longer repeat, there are too many online, a key installation script also has a lot, but many can not be used, can be used only in the CentOS6 under the use, CentOS7 basically did not see these installation scripts. Then spent some time to toss the test, write this script to facilitate the VPN after the installation of a key to build. The open source package is Openswan and xl2tpd, and there are many problems in the middle, such as compatibility between Openswan and
The 1,ipsec VPN application is more and more extensive, the following configuration instance is to the single headquarters multiple branch organization actual application
According to the configuration of this article, we can achieve the maximum VPN connectivity through the minimum number of VPN tunnels, the network topology is as follows:
As shown above, the Headquarters firewall machine hub firewall name is fortigate_1, its external network port
Cisco IOS Software IPsec Packet Processing Denial of Service Vulnerability
Cisco IOS Software IPsec Packet Processing Denial of Service Vulnerability
Release date:Updated on:
Affected Systems:Cisco IOSDescription:--------------------------------------------------------------------------------Bugtraq id: 68177CVE (CAN) ID: CVE-2014-3299Cisco IOS is an interconnected network operating system used on most C
Python implements an ipsec permission opening instance and pythonipsec
This example describes how to Enable ipsec access in python. Share it with you for your reference. The specific implementation method is as follows:
The command line tool netsh ipsec static add filter in windows does not support batch addition. Duplicate rules are also added. I wrote ipsecset
For network communication that requires encryption, there are many options, such as various VPN: L2TP/IPSec VPN, PPTP, SSL
The following is a simple point-to-point IPSec tunnel, which is so simple that it seems that the Internet is not very large... Maybe I am not quite right. L2TP and various VPN gateways have found a lot...
In this way, you can set the IP security policy of the Local Machine to perform se
I recently used ipsec-tools for testing and used static configuration. Release several combinations here. The combination of transport and esp does not exist.
1. transport + ah
# To manually configure IPSEC tunnels on a x86 router:# setkey -f
2. tunnel + ah
The Gateways on both sides are 10.1.2.80 and 10.1.2.90, And the subnets are 192.168.9.0/24 and 192.168.10.0/24, respectively.
# To manually conf
In the front I sent an article "Juniper Firewall diagram L2TP VPN Configuration", we learned from that article how to configure. But we know that the L2TP VPN is only connected to our L2TP VPN server, but it doesn't encrypt our data, and we know that IPSec's data is encrypted, and if the IPSec-unaware friend can look at my previous IPSec VPN concepts (i) And the concept of
Case topology Map
Cisco (3640) realizes
Step 1: The basic configuration of a router
A (config) #do Sho run
Building configuration ...
Current configuration:1410 bytes
!
Version 12.4
Service Timestamps Debug DateTime msec
Service Timestamps log datetime msec
No service password-encryption
!
Hostname A
!
Boot-start-marker
Boot-end-marker
!
!
No AAA New-model
Memory-size Iomem 5
!
!
IP CEF
No IP domain Lookup
IP domain name lab.local
!
Crypto ISAKMP policy 1
Authenticat
Objective:
IPSec (internetprotocolsecurity) is an open standard framework structure and a long-term direction for secure networking. It provides proactive protection through end-to-end security to prevent private network and internet attacks. In communications, only the sender and receiver are the only computers that must understand IPSEC protection. Secure and secure communication between workgroups, loca
Cisco IOS IPSec MTU Remote Denial of Service Vulnerability
Release date:Updated on:
Affected Systems:Cisco IOS 15.3Description:--------------------------------------------------------------------------------Bugtraq id: 63874CVE (CAN) ID: CVE-2013-6694
Cisco IOS is an interconnected network operating system used on most Cisco system routers and network switches.
A Remote Denial of Service (DoS) vulnerability exists in the
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