RT7304 Active power factor QQ2892715427 correction capability LED Driver
Accurate LED Current output
No need to use optocouplers and TL431
Power factor correction
Quasi-resonant technology
Maximum/minimum operating frequency limit
Maximum/minimum on-time limit
Wide VDD voltage range (up to 25V)
Multiple protection features? LED Open Circuit protection? LED Short Circuit protection? output diode short-circuit protection? VDD Undervoltage
hard drive will be read for a long time if the program goes wrong, and account for
Use a lot of space. If this is the case, look for the User.dmp file, which saves dozens of MB of space after deletion.
Local Security policy configuration
Start > Program > Management Tools > Local Security Policy
Account strategy > Password Policy > Password minimum age change to 0 days [that is, the password is not available, I mentioned above will not cause IIS password is not synchronized]
Account Strategy >
Web site to rely on the server to run the entire system, the security level of the server directly related to the stability of the site, strengthen the security level of the server, to avoid the site information was malicious leakage.
An account-based security policy
1. Account name change
Administrators and guest are Windows system default system accounts, and because of this they are most likely to be exploited, and attackers log on to the server by cracking the password. Can be prevented b
someone else goes out, they run to their computers and turn them over. If the computer is stored in a lot of popular information is also indifferent, but in case of storage are some confidential documents or personal privacy, it will inevitably have the possibility of leaks. In fact, can completely transform the hands of a U disk into a "boot key disk." only when the U disk inserted, the computer can work properly, and once something goes out, just unplug the U disk, Windows will automatically
until the system was compromised. The following audits are required to be open, and others can be added as needed:
Policy settings
Audit System Login Event succeeded, failed
Audit account management Success, failure
Audit Login Event Success, failure
Audit object Access succeeded
Audit policy Change succeeded, failed
Audit privilege use succeeded, failed
Audit system event succeeded, failed
5. Open Password Password policy
Policy settings
Password complexity requirements Enabled
Minimum passw
a breakthrough for hackers to hack into their systems.
3, the system administrator account name
As you all know, Windows 2003 administrator users cannot be deactivated, which means that others can try this user's password over and over again. Try to disguise it as a regular user, such as GUESYCLUDX.
4. Create a trap user
What is a trap user? That is, create a local user named "Administrator", set it to the minimum, do nothing, and add a super complex password of over 10 bits. This would all
end of the corresponding documents and the path to follow the steps to set
These permissions are set, and then the local security policy is turned on
Set auditing permissions Change Guset account name and set a very complex password
Local Security policy configuration
Start > Program > Management Tools > Local Security Policy
Account strategy > Password Policy > Password minimum age change to 0 days [that is, the password is not available, I mentioned above will not cause IIS password is n
FTP account password set too simple, it is possible to be "lawless" cracked. In order to improve the security of the FTP server, users must be forced to set a complex account password.
In the Local Security Settings window, expand security settings → account policy → password policy, and in the right box, locate the password must meet complexity requirement, double-click Open, select the Enabled option, and then click OK.
Then, open the "Minimum password Length" item to set the minimum charac
Sometimes when you are working, a prompt pops up, forcing you to click on it, which is annoying. In fact, we clicked User Configuration → admin templates → start menu and taskbar in the left pane of the Open Group Policy dialog box. Then, in the right pane, double-click the "Close all balloon Notifications" item, select Enabled under the Settings tab in the Turn off all Balloon Notification Properties dialog box, and then click "OK" to quit, you can put the annoying "balloon notice" turned off
The synchronization tool class can make any kind of object, as long as the object can coordinate the control flow of the control thread according to its own state. The blocking queue can be used as a synchronization tool class, and other types of synchronization tool classes include: semaphore (Semaphore), fence (Barrier), and latching (Latch).AtresiaFirst, let's introduce the latching.Latching acts as a door: the door is closed until the latch reaches a certain state, and all threads wait at th
/inittab|grep Ctrlaltdel See if the input line is commented
Backup method:
#cp-P/etc/inittab/etc/inittab_bak
Reinforcement method:
#vi/etc/inittab
Add an annotation symbol "#" at the beginning of a line
#ca:: Ctrlaltdel:/sbin/shutdown-t3-r now
V. User identification
5.1 Set account lockout logon failed lock count, lockout time
Check method:
#cat/etc/pam.d/system-auth to view settings for Auth re
join the domain.
Second, the general online tutorials are often said to install the system after the "Patch shop", in fact, this is very unsafe, then the system's safety factor is almost 0, access to network updates when veryIt is possible to "win the Lottery", we first play a good system underlying security.1, start run the input "lusrmgr.msc" (quotation marks do not follow the same) open Local users and groups, where first build a "backup Operators" group of users, for day-to-day data bac
, repeatedly log on to the FTP server, to guess the account password. This is very dangerous, so we recommend that you limit the number of login times.
Expand "Security settings → account policy → account lockout policy", in the right frame to find "Account lockout threshold" Item, double-click Open, set the maximum number of account login, if more than this number, the account will be automatically locked
, which saves dozens of MB of space after deletion.
Local Security policy configuration
Start > Program > Management Tools > Local Security Policy
Account strategy > Password Policy > Password minimum age change to 0 days [that is, the password is not available, I mentioned above will not cause IIS password is not synchronized]
Account Strategy > account lockout policy > account lockout threshold
simultaneously audit its success and failure events. Account Management: Create, modify, or delete users and groups, and make password changes that must audit both its success and failure events. When you open the above audit, when someone tries to do something to your system (such as trying user passwords, changing account policies, unauthorized file access, etc.), it is logged by the security audit, stored in the security log in Event Viewer. In addition to the "Local Security policy" can als
, create a local user named "Administrator", set it to the minimum, do nothing, and add a super complex password of over 10 bits. This would allow those hacker to be busy for a while to discover their invasion attempts.5. Change the permissions of shared files from Everyone group to authorized usersDo not set the users who share files to the Everyone group, including print sharing, the default attribute is "Everyone" group, must not forget to change.6. Open User PolicyUsing User policy, set the
the Local Security Settings window, expand security settings → account policy → password policy, and in the right box, locate the password must meet complexity requirement, double-click Open, select the Enabled option, and then click OK.
Then, open the "Minimum password Length" item to set the minimum character limit for the FTP account password. Since then, the security of the password has been greatly enhanced.
3. Account Login Limit
Some illegal users use hacker tools, repeatedly log on t
constructor, which requires bidirectional data binding using ObjectDataSource. Click on the logout link to exit.Sub detailsview1_itemupdating (ByVal sender as Object, ByVal e as DetailsViewUpdateEventArgs)' The update operation must be handled manually because MembershipUser does not have a parameterized constructorDim Memuser as MembershipUser = Membership.getuser ()Memuser.email = CStr (e.newvalues (0))Memuser.comment = CStr (e.newvalues (1))TryMembership.updateuser (Memuser)E.cancel = TrueDe
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