dns cache poisoning

First describes how to establish a high-speed DNS cache server on FreeBSD, citing the words in the Freebs D Chinese Manual: A cached domain name server is a domain name server that does not provide authoritative resolution for any domain. It simply completes the query itself and remembers the queries for subsequent use. To set up such a server, simply configure a domain name server as usual, without config

Linux Red hat 5 DNS server (I) domain name cache server, hatdnsDetailed setup of multiple experiments on Linux Red hat 5 DNS server Required software packages: › Bind-9.3.3-7.el5.i386.rpm › Provide main programs and related documents › Bind-utils-9.3.3-7.el5.i386.rpm › Provides dns server testing tools (such as nsl

Commands used to refresh DNS cache are often used but are often forgotten. record it here to be prepared. hahaha, this may also be a cup of opportunity for many attacking lions and programmers. Run the command ipconfig/displaydns to check the dns information cached on the local machine. Then, enter the following command... commands used to refresh

This article illustrates the Java implementation method to clean up DNS cache. Share to everyone for your reference. The specific analysis is as follows: First, test environment Os:windows7 x64 Jdk:1.6.0_45 Second, I found four ways to clean up the JVM's DNS cache, we can choose according to their own situation. 1

Usually we can not open the page through the domain name, it is possible to cause the DNS cache (DNS resolved IP address changed), the workaround is as follows:Method One: $nslookup ecafe.pub (here is the domain you want to open)Method Two: $sudo/etc/init.d/nscd restartOr: $service nscd restartOr: $service nscd ReloadIf NSCD cannot execute, install NSCD First, th

Tags: https http-o os pre sierra Rhel sudo SCACReference: Flushing your DNS cache in Mac OS X and Linux Mac OS X clears the DNS cacheSelect the following commands according to the version of Mac OS X operating system:Mac OS X (Sierra) and later:sudo killall -HUP mDNSRespondersudo killall mDNSResponderHelpersudo dscacheutil -flushcacheMac OS X One (El Capit

real DNS server, and use the dnsmasq cache function to speed up. Sudo apt-get install dnsmasq 2. if the machine accesses the Internet through a local area, IP Address/DNS server information is allocated by the DHCP server, and www.linuxidc.com opens/etc/dhcp3/dhclient. conf removes the following line of comment, so that when the DHCP Client is enabled, dnsmasq

Refreshing the DNS cache only needs to be refreshed by using the command to flush the DNS cache. So what is the command to flush the DNS cache? is "Ipconfig/flushdns". The specific steps are as follows: First, hold down the keybo

EnvironmentOperating system: CentOS 6.5DNS software: Bind (Installation reference: "Linux" DNS service-bind basic configuration (ii))Bind slave ServerFrom the server is to add the configuration information from the domain example.net in the main configuration file of Bind 3　　1. configuration file Location　　　/var/named/chroot/etc/named.conf2. Add a zone definition for a row of fields in the master configuration file:Zone "Example.net" {Type slave;Maste

I often ask if domain name resolution does not take effect immediately. Why is it still the original one? The answer is that there is a resolution cache in the local DNS. After the computer first accesses it, it will be cached within a certain period of time.When accessing this domain name, the computer can directly know the IP address by searching for the local DNS