what is dns spoofing

What is the role of the Computer Host Gateway? Suppose your name is Tom. You live in a big courtyard. Your neighbors have many friends. At the door, there is another Uncle Li who looks at the door. Uncle Li is your gateway. When you want to play with a friend in the yard, as

What is the default value for the TTL? Different operating system, its TTL value is not the same. Here to talk about some common operating system default TTL values, by default, the Linux system TTL value of 64 or 255,windows NT/2000/XP system TTL value is 128,windows 98 system TTL value

vi/etc/ssh/sshd_config."#Port 22" to "Port 2222" or insert a line "port 2222" under "#Port 22" to set the default 22Port is modified to port number No. 2222.3. What are the common terminal tools for remote connection Linux?Answer: Putty, Xshell, SECURECRT, Xmanager, etc.4. Manually configure the IP, which configuration file needs to be modified? Change the default configuration file, which areas need to be

also to save the corresponding relationship in the cache, in case the next time another user query, you can directly return the results, Speed up network access. Knowledge Expansion: 1) What is DNS. DNS (domain Name System), a distributed database of domain names and IP addresses that are mapped to each other on the

（转自http://www.linux178.com/web/httprequest.html）写的太好了，转一个。For the HTTP protocol, refer to the following:HTTP协议漫谈 http://kb.cnblogs.com/page/140611/HTTP协议概览 http://www.cnblogs.com/vamei/archive/2013/05/11/3069788.html了解HTTP Headers的方方面面 http://kb.cnblogs.com/page/55442/When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?Domain name resolution--Initiates a TCP 3 hand

of a top-level domain COM domain, so tell the carrier's DNS I do not know the IP address of this domain name, but I know the IP address of the COM domain, you go to find it, so the operator's DNS to get the IP address of the COM domain, Another request to the IP address of the COM domain (what is the IP address of thi

domain, Another request to the IP address of the COM domain (what is the IP address of this domain name www.linux178.com?), COM domain This server tells the operator of the DNS I do not know www.linux178.com the IP address of this domain name, but I know linux178.com this domain DNS address, you go to find it, so the

carrier's DNS I do not know the IP address of this domain name, but I know the IP address of the COM domain, you go to find it, so the operator's DNS to get the IP address of the COM domain, Another request to the IP address of the COM domain (what is the IP address of this domain name www.linux178.com?), COM domain T

HTTP protocolFor the HTTP protocol, refer to the following:HTTP协议漫谈 http://kb.cnblogs.com/page/140611/HTTP协议概览 http://www.cnblogs.com/vamei/archive/2013/05/11/3069788.html了解HTTP Headers的方方面面 http://kb.cnblogs.com/page/55442/When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?Domain name resolution--Initiates a TCP 3 handshake--initiates an HTTP request after the TC

find it, so the operator's DNS got the COM domain IP address, Also launched a request to the IP address of the COM domain (what is the IP address of www.linux178.com This domain name, please?), COM domain This server tells the operator DNS I don't know www.linux178.com this domain IP address, but I know linux178.com t

What is a domain name? Domain name is the unique name of the site, such as Microsoft.com and jb51.net. Registration is required for registration. When a domain name is registered, it is added to a large domain registrar, alo

connect to Host (OS)Server. Similarly, if you give an alias to someone, this alias does not actually mean anything except yourself (the person you get the alias, when you say this alias, you know who it refers to (equivalent to your host ). Hosts fileIf you have such a ing entry, you do not know who the alias is (equivalent to your host ). Hosts fileWithout such a ing entry), you don't know what the

the domain name resolution file hosts what files. What's the effect? 1. Speed up Domain name resolutionFor Web sites to visit frequently, we can configure the domain name and IP mapping relationships in hosts so that when we enter a domain name computer, we can quickly resolve IP without requesting a DNS server on the network.2. Easy LAN UsersIn many units of the local area network, there will be a serve

are quarreling. These days, Tom always calls Tom and thinks, "Fuck, is he talking bad about me ?" So James decided to eavesdrop on a conversation with Tom, but he was not allowed to leave the hospital. What should he do? James made the following decision: First, he told Ye Wang, the phone number manager in his courtyard, "you have called Ye Li to say that Mr. Smith has moved to our yard. I will pick up th

matter the order, error, or re-send of packets. Therefore, UDP is not applied to connection-oriented services that use virtual circuits, and UDP is primarily used for services that are query-----responsive, such as NFS. These services need to exchange less information relative to FTP or telnet. Services that use UDP include NTP (Network Time Protocol) and DNS (

What is URL forwarding? URL Forwarding is a special value-added Domain Name Service provided by Chinese enterprise resources for domain names registered with Chinese enterprise resources. This service is set through special technologies of Chinese enterprise resource servers, when you access your domain name,

What mail server is better for linux-Linux Enterprise Application-Linux server application information, the following is a detailed description. Recently I want to learn about the mail server in LINUX, but I don't know what to use? Check on the Internet and check whether there are many problems such as postfix, Qmail,

higher the version, the more security is usually better. What's the use of IIS? About the role of IIS and some of the friends used are web site technicians or webmaster, for ordinary computer users, so we can see that the normal installation of the XP/WIN7/WIN8 system does not have IIS functionality, mainly because IIS is useless to ordinary users, was castrated.

do not provoke others, others do not necessarily do not provoke us, although the heart is very uncomfortable, but the problem also needs to be solved.　　site attacks are generally divided into 3 categories, namely ARP spoofing attacks, CC attacks, DDoS traffic attacks .　　First, say ARP spoofing attackIf an ARP spoofing