cloudflare dns servers

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Investigate how CVE-2015-5477 & CloudFlare Virtual DNS protects its users

Investigate how CVE-2015-5477 CloudFlare Virtual DNS protects its users Last week, ISC released a patch to fix a remote vulnerability in the BIND9 DNS server. This vulnerability causes the server to crash when processing a certain data packet.The announcement indicates that an error occurs when the server processes a TKEY-type query. This error causes assertion

Configure domains from DNS servers and cache DNS servers

One, the role of domain from DNS serverAs we mentioned in our previous essay, there are generally three types of DNS servers, one is primary DNS server (primary DNS server), one is secondary DNS server (from

Linux-dns Services-configuration of secondary DNS servers (bottom)

"Linux.net" in {Type slave; Set to secondary typeFile "Slaves/linux.net"; Specifies the file name and location of the replicated zone database (the reason is "slaves/linux.net" becauseMasters {192.168.10.10;}; When the secondary DNS server is configured, the secondary server automatically replicates the forward zone database files from the primary server and}; Reverse zone database file to secondary server/var/named/chroot/var/named/slaves)Zone "10.1

Configuring DNS Secondary servers: DNS series four

security reasons, the primary server does not allow any DNS servers to replicate data from its own zone, and by default only DNS servers in this zone are allowed to be secondary DNS servers. As the following illustration shows, s

Backup of forward and reverse regions and Master/Slave servers of DNS servers

DNS knowledge: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/2015443221-0.jpg "style =" float: none; "title =" aa.jpg "alt =" 215806990.jpg"/> 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/2015445355-1.jpg "style =" float: none; "title =" bb.jpg "alt =" 215808235.jpg"/> 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/201544JF-2.jpg "style =" float: none; "title =" cc.

Configuring DNS secondary domain name servers and child domain name servers

I. Planning INSTRUCTIONS: Host A: Dual NIC 192.168.1.7--> mydomain.org Primary Domain name server 192.168.10.7--> myzone.org The primary domain name server, which has two subdomains, for market.myzone.org and develog.myzone.org Host B: Dual NIC 192.168.1.6--> mydomain.org Auxiliary domain name server 192.168.10.6--> market.myzone.org Sub-domain name server Both servers have DNS-independent logs for logging

Build DNS servers in Linux for forward, reverse, and access to different DNS resolution

=" Sohu.net.zone.png "style=" Float:none "src=" http://s3.51cto.com/wyfs02/M00/6B/E3/ Wkiom1u44ydcr9hwaadeowr3wgi440.jpg "alt=" Wkiom1u44ydcr9hwaadeowr3wgi440.jpg "/>DNS domain resolution file:/var/named/chroot/var/named/5.6.7.arpa650) this.width=650; "title=" 5.6.7.arpa.png "style=" Float:none "src=" http://s3.51cto.com/wyfs02/M00/6B/DF/ Wkiol1u45h6rjjigaacrgsdgqcw215.jpg "alt=" Wkiol1u45h6rjjigaacrgsdgqcw215.jpg "/>Above configuration complete must

Several ways to protect DNS servers summary _dns server

1. Using DNS Forwarders DNS forwarders are for other DNS servers The DNS server that completes the DNS query. The primary purpose of using DNS forwarders is to mitigate the pressure o

Configuring DNS secondary domain name servers and child domain name servers

I. Planning INSTRUCTIONS: Host A: Dual NIC 192.168.1.7--> mydomain.org Primary Domain name server 192.168.10.7--> myzone.org The primary domain name server, which has two subdomains, for market.myzone.org and develog.myzone.org Host B: Dual NIC 192.168.1.6--> mydomain.org Auxiliary domain name server 192.168.10.6--> market.myzone.org Sub-domain name server Both servers have DNS-independent logs for l

Effective measures to ensure the security of DNS servers

DNS ServerIt is a domain name system or Domain Name Service. The domain name system assigns domain name addresses and IP addresses to hosts on the Internet. DNS software is a target that hackers are keen on and may cause security problems. This article provides 10 most effective methods to protect DNS servers. 1. Use a

Top 10 tips for protecting DNS servers

Welcome to the Windows community forum, and interact with 3 million technical staff to access the DNS software, which is a target of cyberattacks and may cause security problems. This article provides 10 most effective methods to protect DNS servers. 1. Using a DNS forwarder is a D

Analysis of IPv6 DNS servers

The premise for the commercial use of IPv6 is that IPv4 addresses are exhausted. For this reason, we urgently need the IPv6 protocol to improve this situation. So how does IPv6 distribute DNS servers? Next we will analyze the principles in depth. Hope to help you. What is the architecture of the IPv6 Domain Name System? The DNS in the IPv6 network is consistent w

Three methods to protect DNS servers against malicious attacks

, AX has a solution, that is, the DNS application service firewall. AX has three powerful methods in this issue, which can effectively mitigate the impact of these attacks,1. First, Filter non-DNS protocol packets Malformed Query Filter)2. Then, Cache the information queried through the DNS server)3. If a large number of normal queries are encountered, AX can sta

How DNS servers work

server about which DNS servers are responsible for each top domain, so he will respond to the nearest name server as the DNS servo host that controls the CN domain. In step 5, the root name server has told the local DNS server which is in charge of the domain. cn, and then the local

Exercise caution when setting up DNS servers in the LAN

address. It is impossible to put all Domain Name Information in the Internet on the same computer. Therefore, the DNS system uses a tree structure to store domain name information of different levels on different domain name servers, the top layer is the root domain server. To resolve a domain name www.fyssz.net, the client must first contact the local domain name server. If the domain name information can

Configuration of DNS servers under Windows 2000

If users use Windows SQL Server as the operating system of a computer, they can configure the computer as a Web server, an IIS server, an FTP server, a DNS server, A variety of servers, such as a DHCP server and a WINS server, to provide a service to clients in a network. Of the most important and basic three services provided by Windows Server servers is the dom

Tips for novice deployment of DNS servers

One of the most important components of any current TCP/IP network is the DNS server. A number of things a DNS server can accomplish, such as parsing an Internet URL into an IP address, resolving the host name on the local network, and providing the infrastructure on which the Windows Active Directory depends. Therefore, deploying a DNS server is not a very simpl

How DNS and proxy servers work

The Chinese DNS Name is Domain Name Server (Domain Name Server ). Before you describe DNS, let's briefly introduce the domain name. Generally, each computer connected to the Internet has a unique IP address, so that it can communicate with each other. The IP address is composed of 32-bit binary numbers. It has no association meaning and is inconvenient for users to remember and understand. However, computer

Common knowledge of configuring DNS servers in Linux

Some common knowledge of configuring DNS servers in Linux-Linux Enterprise Application-Linux server application information. The following is a detailed description. It is particularly important to use and configure DNS for how to implement Intranet and build Web servers or other s

DNS of Linux servers

/named.rfc1913.zonesZone "zpy.com" in {type Master;File "Zpy.com.inter"; # #更改地址为zpy. Com.inter(3) [Email protected] named]# vim/etc/named.conf/*zone "." IN{typehint; file "named.ca";}; include "/etc/named.rfc1912.zones";include "/etc/named.root.key"; # #注释掉之前只访问/etc/ Named.rfc1912.zones's Code */viewloacluser{ # #此处名字任意 match-clients {172.25.254.19;};# #仅允许172.25.254.19 Visit zone "." IN{ typehint; file "named.ca";}; include "/ETC/NAMED.RFc1912.zones "; # #下一步操作为访问此文件};viewotheruser {match-cli

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