C12-INSG-基于路由的VPN
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第53卷 第9期2020年9月通信技术Communications TechnologyVol.53 No.9Sep. 2020文献引用格式:申玲钰,朱振乾. 防火墙与IPSEC协同实现L3/L2一体化 VPN [J].通信技术,2020,53(09):2334-2337.SHEN Ling-yu,ZHU Zhen-qian. L3/L2 integrated VPN based on Cooperation of Firewall andIPsec [J].Communications Technology,2020,53(09):2334-2337.doi:10.3969/j.issn.1002-0802.2020.09.040防火墙与IPsec协同实现L3/L2一体化 VPN*申玲钰1,朱振乾2(1.中国电子科技集团公司第三十研究所,成都 610041; 2.中国电子科技网络信息安全有限公司,成都 610041)摘 要:防火墙与IPsec技术为网络安全做出了重大贡献。
防火墙主要用于保护网络不受非法入侵,IPsec技术可实现数据的安全传输。
IPsec VPN安全网关应用广泛,但其不适用于网桥模式。
提出了一种基于NetFilter框架防火墙与IPsec协同实现L3/L2一体化VPN的方案,该方案可在网关与网桥模式下自由切换、配置简单、功能灵活,是一种有效且适应范围广泛的网络防御机制。
关键词:NetFilter;防火墙;IPsec;L3VPN;L2VPN中图分类号:TP393.08 文献标志码:A 文章编号:1002-0802(2020)-09-2334-04L3/L2 integrated VPN based on Cooperation of Firewall and IPsecSHEN Ling-yu1,ZHU Zhen-qian2(1.No.30 Institute of CETC, Chengdu Sichuan 610041,China; 2. China Electronics Technology Cyber Security Co., Ltd.,Chengdu Sichuan 610041, China)Abstract: Firewall and IPsec make great contributions to network security. Firewall is mainly used to protect the network from illegal intrusion, and IPsec technology can realize the safe transmission of data. IPSec VPN security gateway is widely used, but it is not suitable for bridge mode. A scheme of L3/L2 integrated VPN based on NetFilter framework firewall and IPsec cooperation is proposed. The scheme can switch freely in gateway and bridge mode, with simple configuration and flexible function. The L3/L2 integrated VPN is an effective and widely applicable network defense mechanism.Keywords: NetFilter; Firewall; IPsec; L3VPN; L2VPN0 引 言随着网络技术的迅速发展,网络安全问题得到了广泛关注。
Setting Up Your VPN Account:Before launching and using Cisco Any Connect VPN for the first time, you must configure your Multifactor VPN Account.Please follow these steps:Visit https://Log into the site using your usual username (not your email address) and your password just as you would to log into your computerThe system will contact you via your mobile number•If you do not receive a call or text, it may ask your contact preference•If you receive a text message from the system, please reply back to the text message with the 6-digit code provided•If you receive a call, follow the prompts on the phone•Once logged into the MFA site, you will need to setup your Security Questions•If you are unable to log in, please contact End User Support at 601-974-7182On the left-hand side of the site, you can:•Change your phone number•Update your multi-factor method (text, call, or the Mobile App)•Activate the Mobile App•Update your Security Questions•Issue a One-Time Bypass to access the system without your multifactor verificationLogging into VPNOnce your Multifactor Authentication Method has been configured,please follow the instructions below to access VPN.Log into your computer if you have not already and make sure ithas an Internet connection.Launch the Cisco Any Connect Application on your computer.The system should show Ready to Connect. Make sure the Addressin the drop-down box displays the site.Click Connect.Sign in with your username and password. (Not your email address)Respond to the Multifactor Authentication request via your chosenmethod.Once the system displays VPN established and the Cisco WindowMinimizes, you are now connected to VPN and can access ourinternal applications.NOTE:If you experience problems with VPN or accessing a site once connected to VPN, please contact End User Support @ 601-974-7182 for assistance. We are available 24/7 to assist you.VPN TipsYou only need VPN for internal applications. Disconnect from VPN when no longer using an internal application.URLs with an @ or @corp.wan extension are internal applications and WILL require VPN access.•Examples include: JIRA, Confluence, ARKIS, CRM, IPS, Oracle)Visit for aquick list of commonly usedapplications that do not require VPNOpening Files In T eamsWhile you can open filesdirectly in T eams, you mayfind it more useful to openusing the native app (i.e.Powerpoint).•Select the Files tab•Locate your file.•Click/T ap the drop-down menu next toOpen•Select preferred optionYou can also create a T eams video conference via OutlookOn the Home tab of your calendar within Outlook, simply click the New Teams Meeting button.For Windows: Type “Microphone Privacy Settings” in the search bar (bottom left) and make sure you are allowing apps to use the microphone. Repeat for camera if you need to use videoFor T eams: Click on your portrait in the top right and hit the settings button. In the privacy tab, make sure that media permissions are “green”.CSU Training on Microsoft T eamsComprehensive training is available via CSU. Please take a moment to leverage this education tohelp increase your productivity.© 2020 C Spire. All rights reserved.。
1,简述橘黄皮书制定的计算机安全等级内容制定了4个标准,由低到高为D,C,B,AD级暂时不分子级,B级和C级是常见的级别。
每个级别后面都跟一个数字,表明它的用户敏感程度,其中2是常见的级别C级分C1和C2两个子级,C2比C1提供更多的保护,C2要求又一个登录过程,用户控制指定资源,并检查数据追踪B级分B1、B2、B3三个子级,由低到高,B2要求有访问控制,不允许用户为自己的文件设定安全级别A级为最高级,暂时不分子级,是用户定制的每级包括它下级的所有特性,这样从从低到高是D,C1,C2,C3,B1,B2,B3,A2,简述web站点可能遇到的安全威胁?安全信息被破译非法访问交易信息被截获软件漏洞被利用当CGI脚本编写的程序或其他涉及远程用户从浏览器输入表格并进行像检索之类在主机上直接执行命令时,会给web主机系统造成危险3,论述产生电子商务安全威胁的原因P13在因特网上传输的信息,从起点到目标结点之间的路径是随机选择的,此信息在到达目标之前会通过许多中间结点,在任一结点,信息都有可能被窃取、篡改或删除。
Internet在安全方面的缺陷,包括Internet各环节的安全漏洞外界攻击,对Internet的攻击有截断信息、伪造、篡改、介入局域网服务和相互信任的主机安全漏洞设备或软件的复杂性带来的安全隐患TCP/IP协议及其不安全性,IP协议的安全隐患,存在针对IP的拒绝服务攻击、IP的顺序号预测攻击、TCP劫持入侵、嗅探入侵HTTP和web的不安全性E-mail、Telnet及网页的不安全,存在入侵Telnet会话、网页作假、电子邮件炸弹我国的计算机主机、网络交换机、路由器和网络操作系统来自国外受美国出口限制,进入我国的电子商务和网络安全产品是弱加密算法,先进国家早有破解的方法4,通行字的控制措施系统消息限制试探次数通行字有效期双通行字系统最小长度封锁用户系统根通行字的保护系统生成通行字通行字的检验5,对不同密钥对的要求P113答:(1)需要采用两个不同的密钥对分别作为加密/解密和数字签名/验证签名用。