what is dns spoofing

Tags: Server DNSDNS uses both UDP and TCP port 53 at the same time. This single application protocol uses two transmission protocols at the same time, which is an alternative in the TCP/IP stack. However, few people know under what circumstances DNS uses the two Protocols. If Wireshark, Sniffer, or tcpdump is used f

Files to use:Configuring interface Information/etc/network/interfacesConfiguration content:Auto Eth0Iface eth0 inet StaticAddress 192.168.216.188Gateway 192.168.216.2Netmask 255.255.255.0Configure DNS/etc/resolvconf/resolv.conf.d/baseConfiguration content: NameServer 192.168.216.2To view DNS:/etc/resolv.confCommand:View System Network InformationIfconfigRestart Network Service/etc/init.d/networking restartT

Sometimes when we use a computer, we find that the network suddenly becomes slow, and we may clean up the DNS cache, but we find that the DNS cache is not clean, so what if your computer is a Win7 system and cannot clear the DNS c

DNS concurrently consumes UDP and TCP port 53 is generally accepted, this single application protocol uses two kinds of transport protocol in the case of the TCP/IP stack is also a kind of alternative. The following describes the conditions under which DNS is used in each of

Recently found that the home wireless router Internet is very slow, some friends come to play a mobile phone connected to the Internet, but access to the IP are very normal, ping the site's domain name, found that the domain name can not be resolved. According to the accumulation of knowledge, can not resolve the domain name may be the problem of DNS, in the cmd input ipconfig/all, (please check the cmd co

servers with blocked IP addresses. Because the UDP protocol is used for domain name query, the server does not immediately realize that the host of the other party has been taken offline (or may also be related to the method of the electronic envelope IP address, and does not return an ICMP packet), and does not give up the query after the timeout. However, because the DNS server

Question: How to access the Internet through the server Perform operations on the server's Internet and Internet (the operation sequence is adjustable ): (1) inode connection (2) It is automatically closed after the startmynetwork. Sh terminal runs the command. Question: Which script files have been written by myself, under which paths are there, and what opera

HostsThe Hosts file is a file that is responsible for fast resolution of IP addresses and domain names in the Linux system, and is stored in the/etc/directory in ASCII format. The Hosts file contains a mapping between the IP address and the host name, and also includes the host alias. in the absence of a domain name resolution server, all network programs on the

DNS is responsible for mapping domain names to IP addresses, which is the cornerstone of the entire Internet. DNS is important to us, and if your DNS is tampered with, then your network

the network service. In"/etc/resolv. conf "the configured nameserver information is also lost.Processing Find the corresponding Nic configuration file "/etc/sysconfig/network-scripts/ifcfg-eth Here, For example, if the first network adapter in the system is eth0, its configuration file is/etc/sysconfig/network-scripts/ifcfg-eth0.vim /etc/sysconfig/network-script

How is Dynamic DNS resolution done? This question is not related to PHP, but I don't know which section is appropriate. --------------------------------------------- If you ping some large websites, such as YOUKU.COM,GOOGLE.COM.HK, you will see different IPs after each resolution. This

drivers and physical media, and finally to the receiver. Connection-oriented services, such as Telnet, FTP, rlogin, X windows, and SMTP, require a high degree of reliability, so they use TCP. DNS uses TCP (sending and receiving domain name databases) in some cases, but uses UDP to route information about a single host. 3.UDP UDP is on the same level as TCP, but the packet

Small white is a loyal user of Emacs, on the CentOS server also need to compile and install a Emacs for their own use. Because of the use of a lot of Emacs plug-ins, each time it is very slow to start, almost 5s or so to open a file (let everyone mistakenly think server configuration sucks it). In the speed of opening the file with Vim some gap, vim open file is

name (DNS) on a Dynamic Web page to find the corresponding IP. dynamically generates HTML tables. Quickly establish a "customer reply" system so that Web visitors can send a letter from the Web page to the webmaster. Let the Web page can record the behavior of the Web browser, that is, log. The 6th to 13th chapters, we will introduce some very important, very common, but more complex library suite use meth

distribution In short, when the site opened CDN, users visit the site, not directly to the site of the original server, but a server distributed to your nearest server node, because the server close to you, so access speed or download speed will be faster. Do you remember the previous introduction of the computer Pepsi network to set up DNS? Also mentioned in the DNS server address must fill out the near

When learning network protocols, we need to pay attention to the concepts and applications of DHCP protocols and DHCP servers. So what about DHCP? Next, let's take a look at the basic concepts of DHCP. 1. What is DHCP? Dynamic Host Allocation Protocol (DHCP) is a standard TCP/IP protocol that simplifies Host IP Address

With the development of the network, VoIP services and unified communication platforms become more and more important. The SIP protocol is an exciting focus. Some may ask, what is the SIP protocol? What's better about it? Here we will go into more details. The Chinese meaning of the SIP protocol is the process initiali