dns flood attack

servers use the 4000-byte text record to reply, and flood victims with a large number of UDP packets. Attackers send millions of small and fraudulent queries to third-party DNS servers, which will flood the victim with a large number of DNS response packets. How can we defend against such large-scale attacks? First, m

I have understood this attack for a long time and do not understand what it means to "rebind. After A little understanding, I found that the attack principle is literal. Refresh the DNS A record and bind it to another address. In the following section, I reference the note of a fairy "To mount a DNS rebinding

Scapy is a powerful interactive packet processor written by Python that can be used to send, sniff, parse, and forge network packets, often used in network attacks and tests. This is done directly with Python's scapy. Here is the ARP attack way, you can make ARP attack. Copy Code code as follows: #!/usr/bin/python """ ARP attack """ Imp

Event Causes and analysis This incident is a linkage event, mainly divided into two parts: 1, the Dnspod site's DNS server by more than 10Gbps traffic DDoS attack the suspect because it is the competition between the network game between the business, causing a server operators launched thousands of zombie hosts to Dnspod launched a DDoS flood

Although large websites are often attacked, and under overloaded load, these companies and networks are still doing their best to divert these attacks, and the most important thing is to keep their web sites up to normal browsing. Even if you manage a small site, such as a small company or a small web site of this size, you still don't know when someone will hand you a black hand. So next, let's look at some of the details and attack patterns behind D

servers are set to loop queries, these third-party servers send these requests back to attackers. The attacker stored a 4000-byte text on the DNS server for this DNS amplification attack. Because the attacker has added a large number of records to the cache of a third-party DNS server, the attacker then sends

In the previous article (man-in-the-middle attack ARP poisoning), we discussed dangerous hacker attacks and practical ARP poisoning principles. In this article, I will first discuss how to detect and prevent ARP poisoning (or ARP spoofing) attacks, and then I will review other man-in-the-middle attacks-DNS spoofing.ARP cache attacks are very dangerous. It is important to create security awareness and analyz

Domain Name Server authorized by baidu.com to the local DNS server. The local DNS server continues to initiate a query to baidu.com to obtain the IP address of www.baidu.com. After obtaining the IP address corresponding to www.baidu.com, the local DNS server transmits the IP address to the user in the form of a dns re

This article will introduce several main DNS attack methods. I hope this technology will help you. Use DNS servers for DDOS attacks The normal recursive query process on the DNS server may be exploited as a DDOS attack. Assume that the attacker knows the IP address of the at

hundreds of thousands of users are redirected to a trap site set up by hackers by embedding a server with a cache poisoning attack. The severity of this issue is related to the number of users who use domain name requests. In this case, hackers who do not have a variety of technologies can cause a lot of trouble, so that users can tell others their online banking account passwords and online game account passwords in a confused manner. In this way, t

Name Service provider 114DNS found a "monitoring data anomaly." Then, the security team successfully traced to launch this DNS hijacking attack "culprit", and the first time the attack to the Tp-link and other domestic mainstream router manufacturers. 114DNS and Tencent computer stewards say a new round of DNS phishi

IP 92. XX. xx.148.20.50> XX. XX.53: 23600 + [1au] ANY? Isc.org. (36) 07:39:53. 291822 IP 158. XX. XX.238.13616> XX. XX.53: 56854 + [1au] ANY? Isc.org. (36) 07:39:53. 291850 IP 158. XX. XX.238.13616> XX. XX.53: 56854 + [1au] ANY? Isc.org. (36) 07:39:53. 291860 IP 158. XX. XX.238.13616> XX. XX.53: 56854 + [1au] ANY? Isc.org. (36) 07:39:53. 291869 IP 158. XX. XX.238.13616> XX. XX.53: 56854 + [1au] ANY? Isc.org. (36) 07:39:53. 291877 IP 92. XX. XX.148.56278> XX. XX.53: 23600 + [1au] ANY? Isc.org. (

Recently in doing OpenWrt platform, DNS use is DNSMASQ, but through the board to the Internet, the PC's DNS is set to board the time, found that Baidu, etc., but the company mailbox can not open. The domain name of the company mailboxxx-xx-notes.xxx.com.cn form, so the DNSMASQ log opened to see the next. Finally found the problem.How to open DNSMASQ log1. Find/etc/dnsmasq.confIn the OpenWrt system, dnsmasq.

After a series of recent retaliatory attacks caused by the closure of the file sharing website Megaupload, Anonymous's Denial-of-Service "Cannon" has greatly reduced the number of shells fired later. Although Anonymous members intend to break the INTERPOL website in February 28 (mainly through the online version of the "low-track Ionic Gun" Denial-of-Service tool ), moreover, some vulnerable websites (including most recently websites affiliated with Panda Security) have been destroyed, and the

-refresh times$uri = $_server['Request_uri']; $checkip=MD5 ($IP); $checkuri=MD5 ($uri); $yesno=true; $ipdate=@file ($file);foreach($ipdate as$k =$v) {$iptem= substr ($v,0, +); $uritem= substr ($v, +, +); $timetem= substr ($v, -,Ten); $numtem= substr ($v, About); if($time-$timetem $allowTime) { if($iptem! = $checkip) $str. =$v; Else{$yesno=false; if($uritem! = $checkuri) $str. = $iptem. $checkuri. $time."1";ElseIf ($numtem 1) .""; Else { if(!file_exists ($fileforb

Now some small software, control the Update method is generally HTTP read file, determine whether the read text is equal to the version numberOr to determine the QQ nickname, network nickname and so on. above has its own shortcomings, here is recommended a DNS control software updates the backdoor, anti-DDoS. #include strcpy (Szip,inet_ntoa (* (LPIN_ADDR) * (PPADDR));//printf ("%s\n", Szip);}} WSACleanup (); if (strcmp (Szip, "1.0.3.1")//can write sof