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SEARCH KEYWORD -- Unix server security

  How to reset root password in MySQL 8

The user password in MySQL is stored in the user table, the password reset is actually to change the value of record in this table. To change the password in case the password is forgotten, the idea is to bypass the authentication of MySQL and get into the system and update the record password value with SQL command. In MySQL 5, one can start MySQL service with --skip-grant-tables option, this option will tell the service to skip loading the grant tables when starting, hence the root user can lo...

   MYSQL,PASSWORD,MYSQL 8     2018-12-24 21:27:13

  WireGuard VPN Troubleshooting

When you are working as a network/cluster admin for you team to config the WireGuard VPN for other members, you may meet some of the problems below and these are the solution you can try to fix them. ----------------------------------------------------------------------------------------------------------- Problem [1]: The WireGuard handshake request send from the client can be received from the server but the server's response was blocked at some where so the client can not receive serv...

   WIREGUARD,VPN,TROUBLESHOOTING     2021-12-14 09:17:46

  Three Simple Ways to Improve the Security of Your Web App

It seems like web app security has entered the public conscious recently, probably as a result of the press covering the activities of groups like Anonymous and incidents like security breaches at several CAs. Here are a couple of quick security tips to improve the security of your web apps. Think of these as low-hanging fruit, not as a substitute for thorough analysis of your app’s security. If there’s interest in this topic we can do more posts, too - let us know in the com...

   Web app,Security,X-FRAME-OPTIONS,SSL     2011-12-08 10:10:20

  How to check whether a web page can be loaded in iframe

Sometimes you may want to load other website's page in your own website's iframe, but due to some security concerns, other website may have security configurations which prevent you from loading their pages into your iframe. In this case, if you try to load them, you would see a blank page or a text message telling that it's prohibited. Fortunately, you can detect this before you actually decide to load it. To prevent a page from being loaded by an iframe from other site, the response ...

   HTTP,HTML,IFRAME,SECURITY,X-FRAME-OPTIONS,CONTENT-SECURITY-POLICY     2018-07-27 22:36:02

  How to prevent next HeartBleed bug?

How to ensure the security of open source projects is a concern for many open source users including individual users and companies. But it's not an easy task to ensure the security of open source projects. Because everyone can see the source code, there is much higher possibility that a bug may be found by someone. Once a bug is disclosed, people may exploit it and do evil things, this may cause loss of money either for individuals or companies, some of the bugs may even have big impact to the...

   Open source,HeartBleed,Security     2014-04-24 09:07:05

  Generate certificate in Java -- Certificate chain

In previous post, we have introduced the use of Certificate and how to generate self signed certificate using Java. In this post, we will show you how to generate a certificate chain. Sometimes we may only have a certificate request or we don't have a trusted certificate which can be used for business. Now we need to have a trusted CA to sign our certificate so that it can be used on SSL communications. To generate a certificate chain, we may first have our own certificate(A), then we may use ot...

   Java,Certificate chain,Creation, Pure Java     2014-07-30 08:24:52

  How long does the heuristic cache of the browser actually cache?

Heuristic cache Heuristic caching is the default behavior of browser caching (i.e., for responses without Cache-Control), which is not simply "not caching", but implicitly caching based on the so-called "heuristic cache". HTTP is designed to cache as much as possible, so even if Cache-Control is not specified, the response will be stored and reused if certain conditions are met. This is called heuristic caching. HTTP/1.1 200 OK Content-Type: text/html Content-Length: 1024 Date: Tue, 22 Feb 2022 ...

   HEURISTIC CACHE,WEB DESIGN     2023-05-26 08:40:13

  How to play with cross domain request

What is cross domain request In simple, cross domain request is to request resource from other domain in one domain. Note, the "other domain" doesn't just mean domain name only, it includes much more. If the protocol, domain name, port is not the same, two domains will be considered different.  Below example describes what is considered as different domain. http://www.a.com/a.jshttp://www.a.com/b.js               # Same domainhttp://www.a.com/lab/a.js &nb...

   FRONT END,JSONP,CROSS DOMAIN,CROSS ORIGIN,CORS,DOCUMENT.DOMAIN,WINDOW.NAME     2016-11-06 00:48:54

  Install both 32 bit and 64 bit WAMP server

WAMP server is a platform tool for serving PHP applications on Windows. It includes a combination of Apache, MySQL and PHP service which can help developers test or run PHP applications with minimal setup. Sometimes one would first have a 32 bit version of WAMP installed and a few applications have been configured. But later s/he would mistakenly installed a 64 bit version of WAMP and somehow the 32 bit version configuration is overwritten. This causes a problem where the old applications config...

   PHP,WAMP,64 BIT,32 BIT,MULTIPLE VERSION     2017-03-18 01:14:21

  Why Outsourcing .Net Services is a Growing Trend?

IT companies are focusing more on .net for application development. This is because; the .net platform empowers developers with a wide range of tools and libraries to create diverse applications in an easy and efficient manner. The dot net framework allows users i.e. developers, to design and develop applications that can interact with web services and a range of online devices. .Net programming language is richer than others in many contexts. It has several objects oriented features like proper...

   dot net services, outsourcing, .net, framework     2014-10-23 22:30:43

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