mdu security systems

In the same domain, there are two systems that send AJAX requests from one system to another to change a field of the second system's database (if now only send user_id to the second system), how to guarantee the security of Ajax, I am mainly afraid of is everyone know send User_ After the ID of this AJAX is not safe, there are those methods can be as safe as possible? This problem can also be extended to

user, use the hyphen (-) to indicate that the SU program is not only the user, in addition, you need to obtain the user's environment when logging on to the system. Defense methods: In UNIX systems, computer security systems are built on the authentication mechanism. If the root password is out of password, the system will be compromised, especially in the netw

The telnet service is very powerful. This function is used by many administrators. However, due to its security and restrictions, friends who use it may also feel uneasy. Here we will explain the mutual telnet between systems and some security issues. Telnet between host Windows XP and Virtual Machine Linux First, the host machine is Winxp and the ip address is 1

Content Summary: This paper describes the system security protection strategy, so that the system administrator to prevent intruders. For different Linux systems, discuss some ways to improve. Guide Many people are beginning to talk extensively about intrusions into Internet hosts, while Linux and FreeBSD are the main targets of recent attacks, including the buffer overflow problem in IMAPD and bind prog

The Intrusion Detection System (IDS) checks all inbound and outbound network activities and confirms a suspicious pattern in which IDS can specify the attempt to access (or damage the system) someone's network attack (or system attack ). The intrusion detection system is different from the firewall in that the firewall focuses on intrusion to prevent it from occurring. The firewall restricts access between networks to prevent intrusion, but does not send alarm signals to attacks from inside the

During vulnerability assessment and penetration testing, we usually focus on operating system-level vulnerabilities and ultimately ignore Layer 7. This is a very dangerous trap because there are many attacks on remote logon and SSH Linux systems. In fact, in my opinion, most Linux-based defects are at the application layer. It may be Apache, PHP, or OpenSSL, or it is only a common error configuration. If the vulnerability can be accessed through HTTP,

The principle of computer composition and architecture, in the soft examination does not divide the value of the very heavy branch, more scattered. The same picture to share with you.Among them, the composition of the computer is divided into five parts: the arithmetic, memory, controller, input device, output device five most.The architecture of a computer consists of pipelining, code, cache, and so on.Data security has been in the computer developme

Today, it seems that Ryan's interview with Charlie Miller. This guy just captured the Safari browser at the cansecwest hacking competition. For the full text of the interview, see: Http://blogs.zdnet.com/security? P = 2941 One of the most interesting topics in the interview is: Why safari? Why didn't you go after IE or safari? It's really simple. safari on the Mac is easier to exploit. the things that Windows do to make it harder (for exploit to

-------------------------------------------------------------------------Configure the SSH logging feature to record who has logged in to your server via SSHIn the last write:Sshd:ALL:spawn echo ' Date '%c access my sshd >>/etc/sshlogSpawn indicates that the following command is executed' Date ' represents the command to execute date, showing the time of the current system%c indicates the user source IP address----------------------------------------------------------------------------------5, i

Article Title: Linux system deep security reinforcement (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　　　 4. File System Permissions 　　 Find out all programs with "s" bits in the system, remove unnecessary "s" bits, or delete unnecessary ones directly, which can

With its stable and open source code, Linux has been increasingly used as Web servers and database servers on the Internet. As a result, the security of Linux systems has been paid more and more attention, reinforcing the Linux system is imminent for many people. So what should we do to better harden the Linux system to cope with various emergencies and hacker attacks?1. Installation and upgradeUse the late