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
don't move ladders these days. Users of the Internet are not high-quality readers.The following is to tell you how I use CloudFlare CDN, the lower part of the content directly copied the jar, who let him in front of me to write the article, make me not only this article will not write, even the article name do not know how to get good.1. DNS settings:DNS records inside will be pan-resolution removed (if an
The 522 error means that we are unable to reach the origin Web server at all.There are several main reasons for this:
The original server is too overloaded to respond.
The source web server has a firewall that blocks our request, or the packet is dropped within the network of the host.
The source Web server is offline, or with our incorrect DNS settings set for its IP address (that is, away from our request is sent to the wrong place)
DemandFirst make sure you have an own domain name, then log in to CloudFlare and add your domain name. Follow the instructions and use the default values given by it. You will have cloudflare to host your domain, so you need to adjust your registration authority settings. If you want to use a subdomain, add a ' a ' record to it. Currently, any IP address is available.Ddclient is a Perl client that updates d
ConceptUsing the BPF (Berkeley Packet filter) toolset combined with the Iptables XT_BPF module enables high-performance packet filtering to address large-scale DDoS attacks. BPF Tools contains a simple set of Python scripts that are used to parse the Pcap file, and others are primarily used to generate BPF bytecode.First, download and install BpftoolsDownload the zip file in Https://github.com/cloudflare/bpftools, or you can download it via git, and t
CloudFlare is the world-famous CDN service provider, its free package is enough to meet the average user. Optimize the load speed of the website, cache the static resources, distribute the content near the local area to protect against the DDoS attack. In short, very good, very honest. But in the celestial many nodes are sealed, its own DNS was sealed, and Google and FB, the same as the end of the people (i
For domain name management, we must select a third-party DNS service provider when using domain name resolution During website construction, even free domain names are more stable than the original domain name platform. After all, most domain name registration platforms only provide domain name registration services. Stable resolution services are specialized by third-party businesses.If we are a Chinese website, general users will choose DNSPOD, CLOU
Source: http://www.itechzero.com/dns-hijacking-dns-pollution-introduction-and-public-dns-recommend.htmlWe know that some network operators for some purposes, some of the DNS operation, resulting in the use of the ISP's normal Internet settings cannot obtain the correct IP address through the domain name. Common means a
DNS server: Describes DNS service principles, installation, master-slave configuration, and dns master-slave configuration.
DNS server: Describes DNS service principles, installation, and master-slave configuration.
1. Introduction to DN
Web site Deployment ~windows Server | Local Deployment Http://www.cnblogs.com/dunitian/p/4822808.html#iisDNS server deployment is not clear can see an article: http://www.cnblogs.com/dunitian/p/5439816.htmlIn-house PCs, basically DNS are internal servers (because there are some internal sites and systems)So how does the DNS server set up to get the company PC to access the extranet?Just take the transponder
The most common DNS is 8.8.8.8, this is the United States Google, if you do not know your own DNS how to set up we can use 8.8.8.8 or 192.168.1.1 or 192.168.0.1.
Beijing DNS Address:
202.96.199.133
202.96.0.133
202.106.0.20
202.106.148.1
202.97.16.195
Shanghai DNS Address:
202.96.199.132
202.96.199.133
202.96
1. Use the Netconfig command to configure IP, gateway, DNS, and other parameters for the primary DNS.2. Configure primary DNS master configuration file/etc/named.conf3. Configuring a Forward zone database file for primary DNS4. Configure the Reverse zone database file for primary DNS5. Configure the primary configuration file for the secondary
We now have a lot of knowledge about DNS from the previous blog, today we use a comprehensive experiment to string up the previous content to review, this interesting experiment is the private root of DNS. A private root is a DNS root server created by the individual or enterprise itself, which belongs to the creator private and cannot serve as many netizens as t
Many people do not know how to resolve public domain names on their own DNS servers. Now let's announce the steps.
1. You must have your own domain name. Therefore, go to the domain name registrar to apply for a registered domain name. Try to find a large domain name registrar. com. CN or. CN, you can directly go to the http://www.cnnic.net.cn/to register. Other international domain names can go to http://www.net.cn. Remember, unless you are not techn
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 DNS servers), and the
DNS Literacy Series 3: Smart DNS (BIND + VIEW) preface: Smart DNS is the function implementation of BIND + VIEW. In China, the first thing we put smart DNS into the market was even (how can we feel unmodest ). I think the introduction of the VIEW function in BIND9.X is not targeted at China, but this function can solve
Recently met a domestic Daniel, heard a call DNS tunnel technology, after a study, found very interesting, record.
what is DNS tunnel.
DNS tunnel is the DNS tunnel. From the name point of view is to use the DNS query process to establish tunnels, transfer data.
Why use
Description
We know that some network operators perform DNS operations for some purpose, so that the correct IP address cannot be obtained through the domain name through the normal internet access settings of the ISP. Common methods include:DNS hijackingAndDNS pollution. DNS hijacking and DNS pollution are very common in tianchao. Generally, after an error or no
Intelligent DNS is the function realization of bind+view. At home, the first smart DNS into the market is a I (how to give people not humble feeling it). I think bind9.x introduced view (view) function is not for China, but this function just can solve the interconnection between network operators in China, is the pie in the sky. This article unifies oneself these several years to erect maintains the intell
What is DNS hijacking?DNS hijacking also known as domain name hijacking, refers to the use of certain means to obtain a domain name of the analytic control, modify the resolution of the domain name, resulting in access to the domain name from the original IP address to the modified designated IP, the result is a specific URL can not access or access to the false web site.
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