' attribute, it is regarded as the top directory of the directory structure for Orlov block allocation.
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Files can be deleted in reverse mode. The opposite is S!
X (suppressing underlying access)
Mark direct access to files
Z (Suppress dirty files)
Mark dirty files
Lsattr
Chattr
User:
Useradd
Usermod
Usedel
Passwd
Adduser
Deluser
Pwck
Pwconv
Pwuncov
ID
Whoami
Who am I
Who
Finger
Chfn
CHSH
/E
This article describes how to perform a basic security audit for an iOS application, mainly through manual audit of black box or gray box. Note that the red font is the checklist for security audit.1. IPA installation package anal
BKJIA: Many Linux servers are not new machines just deployed. Professional Linux system administrators perform regular maintenance, IT technicians often need to take full responsibility for the security of their servers. If your server is intruded, not only is all sensitive information exposed, but the server itself may cause larger damage to attackers. To avoid
Today, many Linux servers are not just deployed on new machines. Professional Linux system administrators perform regular maintenance. It technicians often have to take full responsibility for the security of their own servers. if your server is intruded, not only will all sensitive information be exposed, but the server itself may cause a larger scale in the han
Today, many Linux servers are not just deployed on new machines. Professional Linux system administrators perform regular maintenance. It technicians often have to take full responsibility for the security of their own servers. if your server is intruded, not only is all sensitive information exposed, but the server itself may cause larger damage to attackers. to
also be obtained outside the shell. For example, there are two commands: Lastcomm (from the Acct package in Ubuntu main repositories) and Auditctl (AUDITD package from the Ubuntu Universe Software warehouse). In addition, Linux Journal published a Good article on the Linux process statistics in 2002. There are also two packages, rootsh and Snoopylogger, except that both are not in the Ubuntu software repos
Lynis is an open-source system security Audit Utility tool that consists of a series of shell scripts that form a comprehensive security-check tool for systems, accounts, processes, and other levels of security risks and are listed in an intuitive way Support the current mainstream
user, there may be security problems in the traditional web security, such as XSS, url jump, CSRF, etc., which belong to the extension of web security.* * Audit points and methods: * * White box Audit method by locating the code to the specific UIWebView, to see whether the
become performance and bad. These are called Demonic Evil regexes:
To group repeating text
Duplicate content within a repeating group([a-zA-Z]+)*, (a+)+ or (a|a?)+ in the aaaaaaaaaaaaaaaaaaaaaaaa! face of such input, are fragile. This can cause a lot of computation. For more details, refer to Redos.
You can use the Node.js tool Safe-regex this to detect your regular:‘(beep|boop)*‘true $ node safe.js ‘(a+){10}‘false Error handling error code, stack informationSome error scena
This article is just a Summary of the notes that have been prepared for a period of time. It is an analysis framework without instantiation analysis.
0x01 tools
Editor (notepad ++, editplus, UE, etc)
TommSearch (string SEARCH) | grep
HttpProtocolDebugger (http debugger)
Fiddler (analysis package, Change Package)
Seay PHP code audit tool (assisted by php-code-audit Analysis)
Several interesting projects
Dvw
What kind of software is Nipper?
In fact, Nipper is short for Network Infrastructure Parser. It should be said that it is a Network architecture Parser. Nipper is an open-source network device security audit tool. The advantage of open source is of course its free nature. Previously called CiscoPars, Nipper has a simple interface, but is powerful and easy to install and use. It can accurately complete the p
At present, the Linux server is the main application scenario of Bastion machine, because most of the bastion machine manufacturers in the market start early, the development of Linux Fortress Machine, build, deployment and other technologies have been very mature. But for the growing popularity of WINDOWS2012 server system support, many start early bastion machine manufacturers experience is poor. This art
Audit ['?? D?T] AuditsAUDITD is an audit service for Linux.This is a man's explanation.AUDITD is the userspace component to the Linux Auditing System. It ' sResponsible for writing audit records to the disk. Viewing the logs isDone with the Ausearch or Aureport utilities. Configuring the AuditRules is do with the Audi
recorded, it is possible to enter the log records directory, file deletion or file modification, it is necessary to upload these files to the Log collection server in a timely manner, preferably a background real-time monitoring process, the directory under the file changes, Directly trigger the synchronization operation, the file timely synchronization to the Log collection server, the network also has all the records in real-time through the log process syslog, the log sent to the log server
Linux User Action Records we can see history by command, but if you delete important data because someone mistakenly manipulated it, then the Linux Historical command is basically not going to work much. How do we look at the Linux user operation record, there is no way to achieve by logging the IP address and a user name operation history? Answer: Yes.The first
Today, a friend shouted in the Linux Group that he needed to write a script to implement unified security configuration for more than 100 Linux systems, and then asked someone to write the script. I have nothing to worry about. They are all very basic syntaxes and have not been optimized, but simply implemented his requirements. Now I will release the script, if
as: Intruders often look for/Etc/shadow directories or similar directories to see if they can find a backup of their password files.
Four, build their own shell account
After two or three two critical steps the intruder finally got the key password file and cracked the password. Now you can run the Telnet program and log on to the host. When you connect to the server, the server displays some of its information to you, typically U NIX, Linux, Aix, I
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
domain for the execution of that application, and other invocations which have not been recorded are denied.
Tomoyo is intended for end users rather than system administrators, although it has not yet seen any appreciable adoption.
Yama
The Yama LSM is not an access control scheme like those described above. It's where miscellaneous DAC security enhancements are collected, typically from external projects suchGrsecurity.
Currently, enhanced restricti
password security will not be restricted by the export laws of security products in the United States.
◆ The BastilleLinuxBastilleLinux (www.bastille-linux.org) project seeks to establish a standard similar to OpenBSD in a Linux environment. This project aims to create a secure distribution for desktops so that network administrators do not have to worry about u
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