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How can i use iptables on centos 7? [closed]
...am trying to open 80 port for httpd service, but something wrong with my iptables service ... what's wrong with it? What am I doing wrong?
...
Can two applications listen to the same port?
Can two applications on the same machine bind to the same port and IP address? Taking it a step further, can one app listen to requests coming from a certain IP and the other to another remote IP?
I know I can have one application that starts off two threads (or forks) to have similar behavior, but...
How to split a string literal across multiple lines in C / Objective-C?
...de it.
#define QUOTE(...) #__VA_ARGS__
const char *sql_query = QUOTE(
SELECT word_id
FROM table1, table2
WHERE table2.word_id = table1.word_id
ORDER BY table1.word ASC
);
the preprocessor turns this into:
const char *sql_query = "SELECT word_id FROM table1, table2 WHERE table2.wo...
Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...S server 8.8.8.8 in order to turn the text address of 'google.com' into an IP address. Ironically, 8.8.8.8 is Google's public DNS server. If nslookup fails, public DNS servers like 8.8.8.8 might be blocked by your company (which I assume is for security reasons).
You'd think that adding your compan...
企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...浏览器将首先查找本地的DNS缓存是否拥有该域名所对应的IP地址。如果有，那么浏览器将尝试直接使用该IP地址访问该网站的内容。如果本地DNS缓存中没有该域名所对应的IP地址，那么它将向DNS发送一个请求，以获得该域名所对应...
How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...od and Production. 1. Make host entry on windows host file 2. Or else add IP or FQDN names on Subject alternative names fields in the certs
– Shankar
Dec 7 '18 at 10:00
...
How do I prevent site scraping? [closed]
...t, you'll need to head to GitHub to read the extended version, with more tips and details.
In order to hinder scraping (also known as Webscraping, Screenscraping, Web data mining, Web harvesting, or Web data extraction), it helps to know how these scrapers work, and
, by extension, what prevent...
XAMPP, Apache - Error: Apache shutdown unexpectedly
...- From the XAMPP Control Panel, under Apache, click the Config button, and select the Apache (httpd.conf).
Inside the httpd.conf file, somehow I found a line that says:
Listen 80
And change the 80 into any number / port you want. In my scenario I’m using port 8080.
Listen 8080
Still from th...
Loadbalancing web sockets
...
Put a L3 load-balancer that distributes IP packets based on source-IP-port hash to your WebSocket server farm. Since the L3 balancer maintains no state (using hashed source-IP-port) it will scale to wire speed on low-end hardware (say 10GbE). Since the distribution...
What's the difference between streams and datagrams in network programming?
...ets
stream (TCP, order and delivery guaranteed,no duplication,no length or char boundaries for data,connection-oriented,reliable, concurrency)
datagram(UDP,packet-based, connectionless, datagram size limit, data can be lost or duplicated, order not guaranteed,not reliable)
raw (direct access to lowe...