Puppet Client Configuration

1. DDoS Attack Basics The main purpose of a Distributed Denial of Service (DDoS) attack is to make the specified target unable to provide normal services or even disappear from the Internet. It is one of the strongest and most difficult to defend attacks. According to the way initiated, DDoS can be simply divided into three categories. The first category to win, massive data packets flocked from all corners of the Internet, blocking IDC entrance, so that a variety of powerful hardware defenses ...

Introduction Cloud application developers and DevOps have successfully developed tens of thousands of applications for IaaS (Amazon AWS, Rackspace, etc.) and PAAs (Azure, Google App Engine, Cloud Foundry, etc.) platforms. These platforms provide basic security mechanisms such as authentication, Dos attack defense, firewall policy Management, logging, basic user and account management, but security concerns remain the primary obstacle to enterprise cloud implementations. Security concerns for the cloud, deploying from a secure configuration ...

In Serengeti, there are two most important and most critical functions: one is virtual machine management and the other is cluster software installation and configuration management. The virtual machine management is to create and manage the required virtual machines for a Hadoop cluster in vCenter. Cluster software installation and configuration management is to install Hadoop related components (including Zookeeper, Hadoop, Hive, Pig, etc.) on the installed virtual machine of the operating system, and update the configuration files like Namenode / Jobtracker / Zookeeper node ...

North Dragon in the network with domain name registration Management Agency CNNIC issued the first "China's domain Name service and security status Report", "Report" shows that China's current domain name server total of nearly million, of which more than 50% of the domain name server is relatively insecure, and China's 57% of the important information systems exist the risk of The following is the "China Domain Name Service and security status report" Full text: report summary:-As of August 10, 2010, monitoring to the World Domain name server total of 16,306,432, which authoritative domain name server 2,903,55 ...

The intermediary transaction SEO diagnoses Taobao guest stationmaster buys cloud host technology Hall August 26 news, the North Dragon Medium net carries the domain name registration management organization CNNIC to release the domestic first "China Domain Name service and the Security status report", "the report" shows that our country current domain name server total quantity nearly million, among them more than 50% 　　Domain name server is relatively insecure, and 57% of our important information systems have the risk of domain name resolution. The following is the "China Domain Name Service and security status report" Full text: report summary:-As of August 10, 2010, monitoring ...

Preface Having been in contact with Hadoop for two years, I encountered a lot of problems during that time, including both classic NameNode and JobTracker memory overflow problems, as well as HDFS small file storage issues, both task scheduling and MapReduce performance issues. Some problems are Hadoop's own shortcomings (short board), while others are not used properly. In the process of solving the problem, sometimes need to turn the source code, and sometimes to colleagues, friends, encounter ...

Migrating applications is not an easy task. Whether you want to move your local infrastructure to the cloud, or spread across multiple cloud vendors, you will face obstacles. Transferring virtual machines, migrating data, and configuring networks can cause problems during migration. Migrate virtual machines. There are many options for migrating virtual machines between the local infrastructure and the cloud: using shared machine image formats, importing, or refactoring. The simplest option for migrating VMS is to share picture formats across multiple platforms. By choosing a cloud provider, IT managers are likely to weigh several factors on their existing VM image file format, so ...

Frost & Sullivan, an IT research and consulting firm, recently predicted that the platform-service (PaaS) market would be the next area of intense competition for cloud-computing start-ups, as the two areas of infrastructure, service (IaaS) and software as services (SaaS), were already commercialized. As most of the software available from the cloud environment is standardized, organizations now expect to take full advantage of the PAAs solution, as this will be the only area where service providers can gain differentiated advantages. It is worth mentioning that PAAs this class of cloud computing services will ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall website promotion is every stationmaster all urgent concern matter. 　　Now we have sorted out the common 100 promotion creativity, everybody according to own ability condition and the external environment, picks the suitable method which oneself likes to use, hoped that has the help to each stationmaster. 1 QQ Group Website promotion method. With dozens of QQ, each QQ joins dozens of groups, sends the website every day. On average 50 qq* per QQ join 50 groups * Each group of 50 persons = 75000 people watch. If QQ more, add ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall 1 QQ Group website Promotion Law. With dozens of QQ, each QQ joins dozens of groups, sends the website every day. On average 50 qq* per QQ join 50 groups * Each group of 50 persons = 75000 people watch. If QQ more, joined the group more, joined the large group, each group of more people, the publicity effect is better. Even excluding online QQ users, the effect can not be underestimated. To endure humiliation, not afraid of being kicked. The other is in QQ Group is can send group mail, for example, you can ...