sdt security

1. Lock important system files System O M personnel may sometimes encounter situations where the root user cannot modify or delete a file. Most of the reasons may be that the file is locked. In Linux, the command for locking a file is chattr. You can use this command to modify the file attributes in the ext2, ext3, and ext4 file systems. However, this command must be executed by the root user. The command corresponding to this command is lsattr, which is used to query file attributes. Modifying

VoIP has many security risks and faces many security threats, but this does not mean that the security of VoIP is irretrievable. In fact, with the frequent occurrence of security events, many VoIP manufacturers are also accumulating experience in practice and using some measures to guarantee the

Wireless networks are becoming more and more mature, but how can we enhance the security level? This requires us to understand the network security level. On the one hand, network security is ensured by encryption. The following describes common wireless network encryption methods. Through the introduction of these encryption methods, you can learn how to set up

MySQL is a fully networked cross-platform relational database system and a distributed database management system with a client server architecture. 1. Preface MySQL is a fully networked cross-platform relational database system and a distributed database management system with a client/server architecture. It has the advantages of strong functions, ease of use, convenient management, fast operation speed, strong security and reliability. Users can us

Security mode of PHP features-security measures and security mode: the security mode of PHP is set up to solve the shared-server security problem. In terms of structure, it is unreasonable to try to solve this problem on the PHP layer, but it is unrealistic to modify the web

Challenge 1: Block 0-day Vulnerabilities Although the national legislation prohibits various hacker behaviors, there are still people who are still at risk in economic interests, and 0-day vulnerabilities are the primary intrusion measures of these hackers. Since the 0-day vulnerability has not been fixed for the first time, the user's system becomes the lamb to be slaughtered. For example, this year, the aurora 0-day vulnerability and extreme 0-day vulnerability of IE browser appear successivel

Database review 5-security and database review securityDatabase review CH7 Security 7.1 database security Introduction If integrity is a database protection measure for authorized users, security is a database protection measure for unauthorized users. Security issues involv

Security O M: Linux system account and logon Security 1. reasonably use the Shell history Command record Function In Linux, you can use the history command to view all the user's historical operation records, and the shell command operation records are stored in the user directory by default. in the bash_history file, you can use this file to query the execution history of shell commands, which helps O M

New release of international Security Organization: 2004 Top Ten Network application vulnerabilities The second annual Top Ten Network Application security vulnerabilities list released by the IT security Professional's open Network Application Security Program (OWASP) adds to the "Denial of service" type of vulnerabi

1, Web Firewall products: Prevents Web page tampering and audit recovery from being passive, can block intrusion behavior is the active type, the IPS/UTM and other products mentioned above is a security universal gateway, there are special for the Web hardware security gateway, domestic such as: Green League Web Firewall, qiming wips (Web IPS), Abroad, there are Imperva WAF (Web application Firewall) and s

Improper security of user accounts is one of the main means to attack and intrude into the system. In fact, careful account administrators can avoid many potential problems, such as choosing strong passwords and effective policies to enhance the habit of notifying users and assigning appropriate permissions. All these requirements must comply with the security structure standards. The complexity of the impl

Smart Device Security: China's online smart device Security Situation Report in 2017, and the situation report in 2017 Smart Device Security: China's online smart device Security Situation Report in 2017. In recent years, security incidents of online smart devices have occur