dns cache poisoning

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Clearing the DNS query cache under Linux/unix/mac

Under Ms-windows, you can use the ipconfig command to clear the DNS cache. However, Linux and UNIX provide different ways to clear the cache. Linux can run NSCD or BIND or DNSMASQ as the name Service cache daemon. Large or workgroup servers may use bind or DNSMASQ as a dedicated ca

Build high-availability server Load balancer components and cache DNS

As shown in the following figure, this task consists of the high-availability server Load balancer component and cache DNS. High-availability server Load balancer component requirements: optimize some key links in the business system architecture, load balancing for TCP layer data traffic, and ensure high service availability. Technology Selection: HAProxy + Keepalived, which are common and mature combinati

Manage DNS Client Cache in Windows 2000 pro

Http://techrepublic.com.com/5100-10877_11-6029680.html? Tag = NL. e116 Manage the DNS Client Cache in Windows 2000 proManage DNS Client caching in Windows 2000 pro By Jim BoyceAuthor: Purple endurerKeywords: Windows 2000 | Microsoft Windows | Domain NamesKeyword: Windows 2000 | Microsoft Windows | Domain Name Takeaway:If a lookup fails for a host because the tar

How to clear the DNS query cache under Linux/unix/mac

I use dial-up connection to the Internet under Linux, frequent dialing disconnection causes the problem of DNS. How do I use shell commands to clear the DNS cache under the Linux/unix release? Under Ms-windows, you can use the ipconfig command to clear the DNS cache. However

Cache DNS forward parsing reverse parsing

/init.d/named can be used to{Start|stop|restart|status|reload}#########################################Bind binary Program: named#########################################Configuration file for named:etc/named.confEtc/rdnc.keySbin/namedvar/named/#########################################Bind-chroot: This is a RPM packageBy default, bind runs under the real root, and once someone has hijacked the DNS server, it has the permissions of the named process.So

Analysis on DNS caching in Nodejs and nodejsdns Cache

Analysis on DNS caching in Nodejs and nodejsdns Cache I accidentally saw an article about sending http requests under nodejs without caching dns results. This means that if you write an http collection program based on nodejs and do not provide dns cache, it will make every

Clear Linux DNS Cache

1. Clear DNS cache in Linux There are two methods to implement DNS caching in Linux:One is to use DNS CacheProgramNscd (Name Service cache Daemon) is responsible for managing DNS cache.One way to implement

About DNS Cache

DNS Cache COMMANDS IN WINDOWS Refresh DNS Cache: C:/> ipconfig/flushdnsWindows IP configurationSuccessfully flushed the DNS resolver cache. View DNS

DNS Cache for Linux

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Server Management and Maintenance: how to clear DNS Cache correctly

Windows 2000 automatically starts the DNS Client Service, which provides the Client name resolution and cache service. Your DNS query results are cached locally. When configuring a DNS server, if you do not have a good grasp of this principle, some incorrect operations will often occur. You can use the command at the c

Clear DNS resolution cache under UbuntuLinux

Most DNS clients cache the results of domain name resolution locally, which can speed up access to the same address. When you open a single page, there are usually multiple access requests to the same domain name. Basically, each file, image, and style sheet ...... These are all DNS resolution requests for the same domain name within the same page. Therefore, if

Ipconfig/flushdns clears the system DNS cache __ Data set

1, the role of Ipconfig/flushdns Ipconfig/flushdns This is used to clear the DNS cache. When accessing a Web site, the system will read the IP address of the domain name from the DNS cache, and find the Hosts file in the system when it is not found, and if not, then request a DNS

How to refresh the local DNS Cache

How to refresh the local DNS CacheI 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 accesses the domain name for the first time, it will be cached within a certain period of time. When the computer accesses the domain name fo

How to clear the DNS cache

Sometimes you may encounter such a situation, the computer suddenly can not be on the net, or there are some sites could not open the situation, but other sites may open. A lot of this is due to DNS cache latency. Using commands to clean up DNS caching methods 1, because of the need to use the command, because we first need to pull out the computer's command di

Three ways XP cannot clear the DNS cache

Three ways XP cannot clear the DNS cache Method one: Flush DNS with repair local connection 1, simple to difficult, first use the simplest way to refresh the DNS cache, is to repair the local connection, in the lower right corner of the desktop taskbar, right click on the

Linux DNS cache, NSCD service

Linux DNS cache, NSCD serviceThese two days to do stress test, found that with webbench pressure domain name than the pressure IP address several times slower, and pressure domain name when nginx concurrency is also very low. Repeated tests many times, suspect time is spent on DNS resolution. Do manual parsing in/etc/hosts:1echo "211.157.145.103 m.app518.com" >>/

Linux dns cache and NSCD service

During the stress tests of the linux dns cache and NSCD service over the past two days, it was found that using webbench to press a domain name is several times slower than that of an IP address, and the nginx concurrency is also low when the domain name is pressed. I tested it multiple times and suspected that the time was spent on dns resolution. manually parse

How to clear DNS query cache in Linux/Unix/Mac

How to clear DNS query cache in Linux/Unix/Mac In Linux, I use a dial-up connection to access the Internet. Frequent dial-up disconnections cause DNS problems. How can I clear the DNS Cache using shell commands in Linux/Unix distributions? In MS-Windows, you can use the ipc

A leveraged attack against DNS Cache servers

Today, I found a domestic machine with abnormal traffic. I found that the DNS Cache service running on this machine was used as an amplification lever for attacks. Let's take a look at it. When a traffic exception is detected, check the TCP session on the server first, and find some abnormal things. After the service is disabled, the traffic decreases, but it still does not return to the normal level. So li

Linux dns Cache and NSCD service

During the stress tests of the linux dns Cache and NSCD service over the past two days, it was found that using webbench to press a domain name is several times slower than that of an IP address, and the nginx concurrency is also low when the domain name is pressed. I tested it multiple times and suspected that the time was spent on dns resolution. perform manual

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