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How do I determine if a port is open on a Windows server? [closed]
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Assuming that it's a TCP (rather than UDP) port that you're trying to use:
On the server itself, use netstat -an to check to see which ports are listening.
From outside, just use telnet host port (or telnet host:port on Unix systems) to see if the connection is...
Enable remote connections for SQL Server Express 2012
...ll re-calculate a new random port for you) AND also open BOTH TCP 1433 and UDP 1434 incoming port rules in the Advanced Firewall control panel. When dynamic ports was blank the SQL Server just hung on start-up.
– Tony Wall
Mar 30 '13 at 0:54
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内存调试技巧:C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
...发团队对其制定明确的管理计划。但好消息是,它们并不怎么神秘。引言
C 和 C++ 程序中的内存错误非常有害:它们很常见,并且可能导致严重的后果。来自计算机应急响应小组(请参见参考资料)和供应商的许多最严重的安全...
What is the largest TCP/IP network port number allowable for IPv4?
...rom port 0, there is usually no enforcement of the 0-1023 reservation. TCP/UDP implementations usually don't enforce reservations apart from 0. You can, if you want to, run up a web server's TLS port on port 80, or 25, or 65535 instead of the standard 443. Likewise, even tho it is the standard that ...
__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...返回值的函数test却有可能没有返回值,程序当然不知道怎么办了!
加上__attribute__((noreturn))则可以很好的处理类似这种问题。把
extern void myexit();修改为:
extern void myexit() __attribute__((noreturn));之后,编译不会再出现警告信息。
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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
...crash掉你的程序。@Laruence 说这个是个经典的坑,我觉得这怎么会是经典的坑呢?上面这代码,你一定会问,为什么if语句判断的不是f.a?而是f.a里面的数组?写这样代码的人脑子里在想什么?还是用这样的代码来玩票?不管怎么...
VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术
...区域,就会放入一个WM_PAINT消息。那么“绘图信息结构”怎么获取呢?BeginPaint函数的第二个参数就是一个绘图信息结构的缓冲区地址,windows会在这里返回绘图信息结构,结构中包含了无效区域的位置和大小,绘图信息结构的定...
【软著】软件著作权证书申请流程及注意事项,模板分享 - App Inventor 2 中...
...码中准备的就是.java代码,但是appinventor没有具体的代码怎么办?不要紧,将.aia导出后,用压缩软件打开aia源码,在src目录下有几个真正的源码文件,记事本打开贴到doc文档中就行了,这几个文件就是它的源码。
doc源码就是做...
NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...串的长度以确保它不会在以后被改变,但是,$-hello又是怎么算出字符串的长度的呢?这里,当NASM遇到’$’的时候,它用这行的开始的位置来取代它,也就是上一行结束时的位置,然后再减去hello的起始位置,便得到了hello...
Connecting to TCP Socket from browser using javascript
...a.org/en-US/docs/Web/API/TCPSocket
Chrome now has support for raw TCP and UDP sockets in its ‘experimental’ APIs. These features are only available for extensions and, although documented, are hidden for the moment. Having said that, some developers are already creating interesting projects usi...