我们只想使某个IP的计算机才能连接到SQLServer服务器,不允许其他客户端连接,怎么操作呢? 解决方法:可以直接在防火墙中做限制,只允许与指定的IP地址建立1433的通讯。当然,从更为安全的角度来考虑,应该把1433端口改成其他的端口。 其他解决方法1(限从
我们只想使某个IP的计算机才能连接到SQLServer服务器,不允许其他客户端连接,怎么操作呢?
解决方法:可以直接在防火墙中做限制,只允许与指定的IP地址建立1433的通讯。当然,从更为安全的角度来考虑,应该把1433端口改成其他的端口。
其他解决方法1(限从指定IP接入的客户端):如果使用SQLServer2005,还可以通过端点限制的方法来实现,,此方法要求一块专门的网卡,所有可以连接SQLServer的客户端均通过此网卡接入(假设此网卡的IP是192.168.1.1):
1.在“SQL Server配置管理器”的“SQLServer2005网络配置中”,禁止除TCP/IP之外的所有协议;
2.使用如下的T-SQL禁止默认的TCP端点
!--
Code highlighting produced byActiproCodeHighlighter(freeware)
--> ALTER ENDPOINT [TSQL Default TCP]
STATE = STOPPED
3.使用如下的T-SQL建立新的TCP端点和授权
!--
Code highlighting produced byActiproCodeHighlighter(freeware)
--> USE master
GO
-- 建立一个新的端点
!--
Code highlighting produced byActiproCodeHighlighter(freeware)
--> CREATE ENDPOINT [TSQL User TCP]
STATE = STARTED
AS TCP(
LISTENER_PORT = 1433,
LISTENER_IP = (192.168.1.1) -- 侦听的网络地址
)
FOR TSQL()
GO
-- 授予所有登录(或者指定登录)使用此端点的连接权限
!--
Code highlighting produced byActiproCodeHighlighter(freeware)
--> GRANT CONNECT ON ENDPOINT::[TSQL User TCP]
TO [public]
完成上述配置之后,只有通过网络地址配置为192.168.1.1的网卡接入的客户端才能访问SQLServer;另外,如果只授予指定登录对端点的连接权限,则只有指定的登录才能接入SQLServer实例。
其他解决方法2(限指定IP的客户端接入)
当SQL Server 2005升级到SP2或者更高的版本的时候,还可以通过新增的触发器来实现控制。
执行下面的T-SQL后,将使除IP地址为192.168.1.1之外的客户端连接失败。
!--
Code highlighting produced byActiproCodeHighlighter(freeware)
--> USE master
GO
CREATE TRIGGER tr_LoginCheck
ON ALL SERVER
FOR LOGON
AS
ROLLBACK TRAN
GO

How to effectively monitor MySQL performance? Use tools such as mysqladmin, SHOWGLOBALSTATUS, PerconaMonitoring and Management (PMM), and MySQL EnterpriseMonitor. 1. Use mysqladmin to view the number of connections. 2. Use SHOWGLOBALSTATUS to view the query number. 3.PMM provides detailed performance data and graphical interface. 4.MySQLEnterpriseMonitor provides rich monitoring functions and alarm mechanisms.

The difference between MySQL and SQLServer is: 1) MySQL is open source and suitable for web and embedded systems, 2) SQLServer is a commercial product of Microsoft and is suitable for enterprise-level applications. There are significant differences between the two in storage engine, performance optimization and application scenarios. When choosing, you need to consider project size and future scalability.

In enterprise-level application scenarios that require high availability, advanced security and good integration, SQLServer should be chosen instead of MySQL. 1) SQLServer provides enterprise-level features such as high availability and advanced security. 2) It is closely integrated with Microsoft ecosystems such as VisualStudio and PowerBI. 3) SQLServer performs excellent in performance optimization and supports memory-optimized tables and column storage indexes.

MySQLmanagescharactersetsandcollationsbyusingUTF-8asthedefault,allowingconfigurationatdatabase,table,andcolumnlevels,andrequiringcarefulalignmenttoavoidmismatches.1)Setdefaultcharactersetandcollationforadatabase.2)Configurecharactersetandcollationfor

A MySQL trigger is an automatically executed stored procedure associated with a table that is used to perform a series of operations when a specific data operation is performed. 1) Trigger definition and function: used for data verification, logging, etc. 2) Working principle: It is divided into BEFORE and AFTER, and supports row-level triggering. 3) Example of use: Can be used to record salary changes or update inventory. 4) Debugging skills: Use SHOWTRIGGERS and SHOWCREATETRIGGER commands. 5) Performance optimization: Avoid complex operations, use indexes, and manage transactions.

The steps to create and manage user accounts in MySQL are as follows: 1. Create a user: Use CREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password'; 2. Assign permissions: Use GRANTSELECT, INSERT, UPDATEONmydatabase.TO'newuser'@'localhost'; 3. Fix permission error: Use REVOKEALLPRIVILEGESONmydatabase.FROM'newuser'@'localhost'; then reassign permissions; 4. Optimization permissions: Use SHOWGRA

MySQL is suitable for rapid development and small and medium-sized applications, while Oracle is suitable for large enterprises and high availability needs. 1) MySQL is open source and easy to use, suitable for web applications and small and medium-sized enterprises. 2) Oracle is powerful and suitable for large enterprises and government agencies. 3) MySQL supports a variety of storage engines, and Oracle provides rich enterprise-level functions.

The disadvantages of MySQL compared to other relational databases include: 1. Performance issues: You may encounter bottlenecks when processing large-scale data, and PostgreSQL performs better in complex queries and big data processing. 2. Scalability: The horizontal scaling ability is not as good as Google Spanner and Amazon Aurora. 3. Functional limitations: Not as good as PostgreSQL and Oracle in advanced functions, some functions require more custom code and maintenance.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 English version
Recommended: Win version, supports code prompts!

WebStorm Mac version
Useful JavaScript development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

SublimeText3 Linux new version
SublimeText3 Linux latest version