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SEARCH KEYWORD -- Network

  SSH Security and You - /bin/false is *not* security

Backstory While at RIT around 2004 or 2005, I discovered that a few important machines at the datacenter allowed all students, faculty, and staff to authenticate against them via ssh. Everyone's shells appear to be set to /bin/false (or some derivative) on said machines, so the only thing you'll see after you authenticate is the login banner and your connection will close. I thought to myself, "Fine, no shell for me. I wonder if port forwarding works?" ...

   Linux,Security,/bin/false,SSH     2012-02-06 07:46:29

  Why Building a Mobile App is Hard

Kent Nguyen has a great article about how building iOS apps takes a lot of work. And, here at Parse, we agree. Making a well-designed app is not a trivial task. Many non-developers hugely underestimate the amount of sweat and tears that goes into a single app. The big component that is overlooked and that Kent stresses is the server component. An app is not an island. Users expect their apps to richly interact with the internet. This means you need to worry about developing code on servers, com...

   Mobile app,Hard,Chanllenges,Platform     2012-02-01 04:45:45

  Sites to go if you want to learn web development

Before you start to do web development, either for a hobby or for your start up project, you should be prepared for learning many different technologies including both front end and back end. You may need to deal with UI design, business logic design, data store and infrastructure setup etc. This seems a very complex. Indeed, if you know where you should go, the  it's actually not so hard. Here are some sites you should go when you face issues while you are doing web development. These site...

   Web development,Resource,Site     2013-09-19 08:12:23

  Handle NXDomain error when resolving IP address in Ruby DNS resolver

In another post, we covered how to resolve SystemStackError when resolving IP address in Ruby. In this post, we would cover another common issue where a NXDomain error is returned when resolving an IP address. The NXDomain error means that the queried domain name does not exist in the DNS. In Ruby, DNS resolver library will use /etc/resolv.conf by default get the name servers to resolve the domain name. There are multiple DNS name servers can be specified in /etc/resolv.conf with below format. ...

   RUBY,RUBY ON RAILS,NETWORK,DNS,NXDOMAIN     2017-07-16 01:39:23

  Tips for Socializing With Friends During College

The shift from high school to college is a pivotal time in a young adult's life, complete with new responsibilities and the exciting opportunity to forge new relationships. Navigating social life in college can be daunting for many, but with the right tips, it's entirely possible to create a fulfilling social experience while still maintaining academic focus. From joining interest-based campus clubs to managing a healthy balance between studies and socializing, there are several strategies to en...

   SOCIAL NETWORK,COLLEGE     2024-04-16 06:40:55

  Resolve SystemStackError issue when resolving IP address in Ruby

In Ruby, Resolv is the default DNS resolution implementation. It can be used to resolve IP address of a hostname. To use it, one just needs to require 'resolv' in the code. But sometimes, a user would want to check /etc/hosts first or some other mechanisms to resolve an IP address. In this case, one can require 'resolv-replace' and then replace the default DNS resolvers with customized DNS resolvers. For example, using resolv-replace, one would write require 'resolv-replace' Resolv::DefaultResol...

   RUBY,RUBY ON RAILS,NETWORK     2017-07-08 09:54:35

  10 happiest tech companies in 2013

According to Tencent Tech, CareerBliss released a list of happiest tech company in America in 2013. Intuit is the happiest tech company in America in 2013. While Google which is widely considered as a best company to work for only ranks 4th place. Let's take a look at the top 10 happiest tech companies. 1. Intuit Happiness index : 4.27 Average salary: $77000 Don't think it's boring to work in a company which focus on software development, in contrast it's very interesting to work in Intuit. Bec...

   CareerBliss,Happiest tech company     2013-04-18 12:33:43

  Signature sign/verification demo in Java

Digital signature is commonly used in areas where data authentication and integrity are required. It is extremely important to have signature while transferring sensitive data from one peer to other peers through network since there might be malicious applications or man-in-the-middle attacks which may alter the data along the way. Java provides some APIs to generate and verify digital signature. One important class is Signature.  When generating the signature, a private key needs to be pa...

   SECURITY,JAVA,SIGNATURE     2015-11-21 09:48:12

  Building a Modern Web Stack for the Real-time Web

The web is evolving. After a few years of iteration the WebSockets spec is finally here (RFC 6455), and as of late 2011 both Chrome and Firefox are SPDY capable. These additions are much more than just "enhancing AJAX", as we now have true real-time communication in the browser: stream multiplexing, flow control, framing, and significant latency and performance improvements. Now, we just need to drag our "back office" - our web frontends, app servers, and everything in between into this cen...

   Web design,Real-time web,web stack     2012-02-15 05:54:41

  How expensive is a MySQL query?

Database access speed is always the bottle neck of many applications. Many application have large amount of data to search, retrieve and display nowadays. How do we improve the performance of our applications, how do we reduce the cost of database access? Apart from the design of database, the quality of the query is also one important factor to take care.  But before that, we need to know how much network traffic a query will consume. Yunyang,Zhang from Nubee in Singapore did some research...

   MySQL,Network traffic,Query     2013-04-09 05:13:33

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