how to root server

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Analysis and countermeasure of DNS root server parsing exception since December

Since entering December, the DNS server recursive column high, after several days of analysis and processing, now the problem has been resolved, the specific content is as follows:Reason:1. The recent increase in DDoS attacks with the randomization

Root Server File named. Root

In the main configuration file/etc/named. conf, a root domain is defined. The zone file is the named. root file under the/var/named directory. It is a very important file that contains the name and IP address of the Internet root server. When the

Domain name root server suffered two large-scale attacks: 5 million attacks per second

Domain name root server suffered two large-scale attacks: 5 million attacks per second In the early morning of January 1, December 11, Beijing time, the root servers of multiple domain name systems were attacked twice at the beginning of last week.

Upgrade Zabbix2.2 to Zabbix3.0.2 in CentOS

Upgrade Zabbix2.2 to Zabbix3.0.2 in CentOS Upgrade Zabbix2.2 to Zabbix3.0.2 in Linux. 1. Operating System Environment[Root @ Server ~] # Cat/etc/issueCentOS release 6.4 (Final)Kernel \ r on an \ m[Root @ Server ~] # Uname-r2.6.32-358. el6.x86 _

Build an opensshserver stepping stone server using Centos

Deployment background: a customer recently asked us to deploy a login stepping stone server in the company's IDC so that users can log on to the server in the IDC first, and then ssh to other servers. Specific requirements: 1) to maximize security,

Full explanation of how to build and deploy an independent SVN server under CentOS5.5

SVN server has two ways to run: 1, independent server (for example: svn: // xxx.com/xxx); 2, with apache (for example: http://svn.xxx.com/xxx); in order not to rely on apache, I chose the first method: Independent svn server. The SVN storage version

NIS Service Construction in linux and case applications

System: Centos6.0 Introduction: NIS (Network Information Services) was first Sun Yellow Pages (yp ); In a large domain, what if multiple Linux Hosts require the same account and password for each host? If you can have an account server to manage the

Security O & M: Use of Linux backdoor intrusion detection tools

Security O & M: Use of Linux backdoor intrusion detection tools 1. Introduction to rootkit Rootkit is the most common backdoor tool in Linux. It mainly replaces system files for intrusion and concealment. This Trojan is more dangerous and concealed

Domain name-based Vm for nginx Configuration

1. Configure DNS resolution [Root @ server ~] # CAT/etc/RedHat-release Red Hat Enterprise Linux Server Release 6.2 (Santiago) [Root @ server ~] # Uname-R 2.6.32-220. el6.i686 [Root @ server ~] # Yum install bind *-y [Root @ server ~] #

RHEL5.4 iptables configuration (figure)

This section will focus on the configuration of the next iptables, which is a tool to ensure network security, Iptables is based on the core firewall, built-in Filter,nat and mangle three tables, filter is responsible for filtering packets, NAT

Linux Server security Settings tutorial _linux

First, the system security record file The record file inside the operating system is an important clue to detect whether there is a network intrusion. If your system is connected directly to the Internet, you find that a lot of people do

RHCE Certification Exam details and highlights

The RHCE exam will be held next month. Therefore, it is important to record the details of the RHCE exam. Hope you can pass the RHCE exam smoothly! Tang sir said he wanted a full score. I hope I can afford it! 1: Clear the default firewall, the

Basic Linux configuration (2)

1. Create a userUseradd RedHatPasswd RedHatIn this way, a user with the username RedHat and password RedHat is created. The default Redhat group is used. The RedHat Directory folder is automatically created in the home directory to store the user's

RedHatCentOS build DNS server forward resolution

The following is a forward resolution (IP192.168.1.2 domain name is www.linuxidc.com) based on the RedHat5 or CentOS system. to ensure the construction is successful, do not miss any step. The following is a detailed step-by-step command to ensure

Sshd + rsync for Data Synchronization

How sshd + rsync achieves data synchronization is simple The client connects to the server through sshd, and the server synchronizes data to the client First, check the kernel information of the server. Server [Root @ server ~] # Uname-Linux

RedHat CentOS build DNS server forward resolution

The following is a forward resolution based on RedHat 5 or CentOS System (IP192.168.1.2 domain name is www.linuxidc.com). To ensure successful construction, do not miss any step. The following is a detailed step-by-step command can also ensure

Centos5.3 build a DNS multi-domain name resolution Server

I. Domain Name and domain name resolution   NetworkIn order to distinguish each host, you must assign a unique address to each host. This address is called "IP AddressAddress ". However, these numbers are hard to remember, so they are replaced by

Implementation of SSH automatic login server with expect script under Linux

Another small trick, using the expect scripting language to implement SSH automatic connection to the server, you can automatically enter the password. Because every time using SSH root@xx.xx.xx.xx connection server, you have to manually enter the

Sshd+rsync How to implement data synchronization

Sshd+rsync to realize the principle of data synchronization is simple The client connects to the server through SSHD, and the server synchronizes the data to the client First look at the server's kernel information Server Side [Root@server ~]#

Detailed steps for RedHat CentOS DNS server reverse resolution

The following is reverse resolution based on RedHat 5 or CentOS System (IP192.168.1.2 domain name is www.linuxidc.com). To ensure successful construction, do not miss any step. The following is a detailed step-by-step command can also ensure success!

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