TAILIEUCHUNG - IOS Version Security

The first item to discuss when talking about router security is the router’s operating system (OS). The OS on Cisco routers is called Internetworking Operating System, or IOS. Most routers will be running an IOS version between and . By the time this book is published,Cisco may have released . Every OS has vulnerabilities, and IOS is no exception. These vulnerabilities generally allow an attacker to disable a router (a denial of service attack),collect information from a router (information leakage), or reconfigure a router (an actual compromise) | Page 6 Friday February 15 2002 2 53 PM CHAPTER 2 IOS Version Security The first item to discuss when talking about router security is the router s operating system OS . The OS on Cisco routers is called Internetworking Operating System or IOS. Most routers will be running an IOS version between and . By the time this book is published Cisco may have released . Eveiy OS has utlnerablii-ties and IOS ss no exception. These vulnerabliitles generally allow an attacker to dss-able a router a denial of service attack coHect mformation Imi a muter information leakage or reconfigure a router an actual compromise . The Need for a Current IOS A key aspect of every good security plan involves operating system security. Every operating system connected to the Internet is subject to attack. Hackers look for OS vulnerabilities to exploit. Cisco IOS has come under increasing scrutiny over the past few years. Bugtraq a full disclosure vulnerabllity lorum reports 14 Cisco vlOecmailiii-ties between 1992 and 1999 23 in 2000 ond 22 ln 2001. Once ported on Bugtraq these vulnerabilities are seen by thousands of hackers a day and are used in numeri ous attacks. With such an increase in vulnerabilities secure remeers must have a rti-rent and stable version of IOS. The next section on IOS versions provides information on how to identify secure IOS releases. Determining the IOS Version You must know what IOS version your routers are currently running before determining whether you should use the latest release. To determine the IOS version log into your router and type show version. The output will be similar to Cisco Internetwork Operating System Software IOS tm GS Software RSP-P-MZ Version 16 RELEASE SOFTWARE fcl Copyright c 1986-1999 by Cisco Systems Inc. Compiled Wed 06-Jan-99 08 15 by preetha 6 Page 7 Friday February 15 2002 2 53 PM The author has highlighted the important IOS information. The first is Version 12. 0 16 showing the IOS release .

• Quản trị mạng
• công nghệ thông tin
• tin học
• mạng
• internet
• quản trị mạng
• hệ điều hành
• virus
• Dự thảo về Công nghệ thông tin
• Phát triển Công nghệ thông tin
• Ngành công nghiệp công nghệ thông tin
• Mục tiêu phát triển công nghệ thông tin
• Luật công nghệ thông tin
• Quản trị dự án công nghệ thông tin
• Ý tưởng dự án công nghệ thông tin
• Hoạch đinh chiến lược
• Tổ chức dự án
• Quản trị dự án công nghệ thông tin
• Lập kế hoạch dự án
• Quy trình quản lý dự án
• Ứng dụng công nghệ thông tin
• Công nghệ thông tin trong dạy tin học
• Thiết kế bài giảng điện tử
• Kỹ thuật chèn hình
• Kỹ thuật tạo hiệu ứng
• Cách làm slide thuyết trình
• Hiệu ứng Powerpoint
• web
• quản trị mạngcông nghệ thông tin