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How to open a specific port such as 9090 in Google Compute Engine
...n, make sure the instances have the network tag applied.
To allow incoming TCP connections to port 9090, in "Protocols and Ports" enter tcp:9090
Click Create
I hope this helps you.
Update Please refer to docs to customize your rules.
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How to test which port MySQL is running on and whether it can be connected to?
...ee a line that looks like this if mysql is indeed listening on that port.
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
Port 3306 is MySql's default port.
To connect, you just have to use whatever client you require, such as the basic mysql client.
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libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...程序里，主要采用callback function （回调函数）的形式完成传输任务，用户在启动传输前设置好各类参数和回调函数，当满足条件时libcurl将调用用户的回调函数实现特定功能。下面是利用libcurl完成传输任务的流程：
1. 调用cu...
What is the largest Safe UDP Packet Size on the Internet
...ented packet. If you want "safe" packets, use a packet protocol on top of TCP.
– Astara
Jun 29 '16 at 1:34
31
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MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
...16-linux2.6-x86_64# ./mysql -ubill -ppass \
-h127.0.0.1 --protocol=TCP
ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
root@myhost:/home/mysql-5.5.16-linux2.6-x86_64# ./mysql -ubill -ppass \
-hlocalhost --protocol=TCP
ERROR 1045 (28000)...
TCP loopback connection vs Unix Domain Socket performance
...re communication with a server running in the same device. Currently using TCP loopback connection for communicating with App and Server (App written in user layer, server written in C++ using Android NDK)
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What can be the reasons of connection refused errors?
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If you try to open a TCP connection to another host and see the error "Connection refused," it means that
You sent a TCP SYN packet to the other host.
Then you received a TCP RST packet in reply.
RST is a bit on the TCP packet which indicate...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...数用于从该连接的输入缓冲区中反序列化出一个符合MySQL协议的包，然后吐给上层使用
handler_.decode = ObMySQLCallback::decode;
// 对于每个decode出来的包进行实际的处理，在OceanBase的实现中，我们大多数时候仅仅是将包push到我们自己...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
... Ops Programmers have solved the situation with a brand spanking new nginx_tcp_proxy_module
Written in August 2012, so if you are from the future you should do your homework.
Prerequisites
Assumes you are using CentOS:
Remove current instance of NGINX (suggest using dev server for this)
If possible...
Remote JMX connection
...If I try to connect to this port from a remote machine using jconsole, the TCP connection succeeds, some data is exchanged between remote jconsole and local jmx agent where my MBean is deployed, and then, jconsole displays a connect error message. I performed a wireshark capture, and it shows data e...