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【DM版本】:8.1.3.62_pack17
【操作系统】：windwos
【CPU】:x86_64
【问题描述】*：DM管理工具无法连接数据库
1、当前网络和disql情况
客户端能ping通服务器

客户端能telnet通达梦数据库服务
客户端disql能连接达梦数据库

客户端DBeaver能连接达梦数据库
2、DM管理工具连接数据库报错，错误号：6001。如下图

3、具体日志如下：

我认为的关键的日志，Caused by: java.net.SocketException: Connection reset

[ERROR] 登录服务器失败
dm.jdbc.driver.DMException: 网络通信异常
	at dm.jdbc.driver.DBError.throwException(SourceFile:778) ~[?:?]
	at dm.jdbc.a.a.a(SourceFile:254) ~[?:?]
	at dm.jdbc.a.a.e(SourceFile:636) ~[?:?]
	at dm.jdbc.a.a.d(SourceFile:617) ~[?:?]
	at dm.jdbc.driver.DmdbConnection.openConnection(SourceFile:688) ~[?:?]
	at dm.jdbc.internal.conf.EP.connect(SourceFile:143) ~[?:?]
	at dm.jdbc.internal.conf.EPGroup$EPSelector.select(SourceFile:486) ~[?:?]
	at dm.jdbc.internal.conf.EPGroup.connect(SourceFile:329) ~[?:?]
	at dm.jdbc.driver.DmDriver.do_connect(SourceFile:164) ~[?:?]
	at dm.jdbc.driver.DmDriver.connect(SourceFile:450) ~[?:?]
	at java.sql.DriverManager.getConnection(DriverManager.java:664) ~[?:1.8.0_382]
	at java.sql.DriverManager.getConnection(DriverManager.java:208) ~[?:1.8.0_382]
	at com.dameng.common.persistence.connection.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:165) ~[?:?]
	at com.dameng.common.persistence.connection.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:142) ~[?:?]
	at com.dameng.common.persistence.connection.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:116) ~[?:?]
	at com.dameng.common.persistence.connection.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:106) ~[?:?]
	at com.dameng.common.persistence.connection.DefaultConnectionManager.getConnection(DefaultConnectionManager.java:39) ~[?:?]
	at com.dameng.common.persistence.session.Session.newConnection(Session.java:548) ~[?:?]
	at com.dameng.common.persistence.session.Session.connect(Session.java:524) ~[?:?]
	at com.dameng.tool.dialog.ConnectDialog.service(ConnectDialog.java:321) ~[?:?]
	at com.dameng.common.gui.dialog.AbstractTitleAreaDialog$1.execute(AbstractTitleAreaDialog.java:298) ~[?:?]
	at com.dameng.common.event.AbstractNotifiable.run(SourceFile:61) ~[?:?]
	at com.dameng.common.gui.busy.BusyExecutor$1.run(BusyExecutor.java:114) ~[?:?]
Caused by: java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:210) ~[?:1.8.0_382]
	at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_382]
	at dm.jdbc.util.buffer.ByteArrayNode.load(SourceFile:129) ~[?:?]
	at dm.jdbc.util.buffer.Buffer.load(SourceFile:365) ~[?:?]
	at dm.jdbc.a.c.a(SourceFile:79) ~[?:?]
	at dm.jdbc.a.a.e(SourceFile:334) ~[?:?]
	at dm.jdbc.a.a.a(SourceFile:215) ~[?:?]
	... 21 more

4、尝试限制DM管理工具只能通过IPv4连接数据库，报错依旧。

5、求排查思路。