mitm

vulnerabilities to publish rogue software, that is, the CNNIC (China Internet Network Information Center) that suddenly suspends domain name resolution when the CN Domain name suddenly stops being used ), it -- secretly obtained the CA permission! When all Chinese users are concealed! What does it mean? This means that CNNIC can create a fake certificate for any website at will, replace the real certificate of the website, and steal any information from us! This is the legendary SSL

[ ' user_id ']}:#{payload[ ' JTI ']}" # See if the key value already exists in Redis. Returns nil if it does not exist. Returns "1" if it exists. . if redis.getset (Key, "1") # return 401 Span class= "hljs-comment" ># end # for key value expiration check Redis.expireat (key , Payload[ ' exp '] + 2) end How to prevent MITM (man-in-the-middle) AttacksThe so-called MITM attack, is the client and server side

is completely unaware that the JWT mechanism is stateless.There are several common practices that can be used as a reference for this scenario:1. Timestamp + shared secret keyFor this scenario, both the client and the server need to know: User ID Shared secret key Clientauth_header = JWT.encode({ user_id: 123, iat: Time.now.to_i, # 指定token发布时间 exp: Time.now.to_i + 2 # 指定token过期时间为2秒后，2秒时间足够一次HTTP请求，同时在一定程度确保上一次token过期，减少replay attack的概率；}, "Service sideclass ApiContr

Reprinted from: https://imququ.com/post/how-to-decrypt-https.html Jerry QuWeb Security is a systematic project, and any slight negligence can cause the entire security barrier to fall apart. Take HTTPS, it's "content encryption, data integrity, identity authentication" three security assurances, will also be illegal root certificate, server configuration error, SSL Library vulnerability, private key theft , and so on risk. Many students think that as long as the site address before the visit has

hostnameverifier HV = new Hostnameverifier () { Public Boolean verify (String Urlhostname, sslsession session) { System.out.println ("Warning:url Host:" + urlhostname + "vs. " + Session.getpeerhost ()); return true; } }; private static void Trustallhttpscertificates () throws Exception { javax.net.ssl.trustmanager[] Trustallcerts = new javax.net.ssl.trustmanager[1]; Javax.net.ssl.TrustManager TM = new MiTM

seconds is sufficient for an HTTP request, at the same time ensuring that the last token expires, reducing the probability of replay attack;}, "Service sideclassapicontroller2, timestamp + shared secret key + blacklist (similar to Zendesk's practice)ClientAuth_header = Jwt.encode ({user_id:123, Jti:rand (2 Service sidedefset_current_user_from_jwt_token# The previous steps refer to the above payload=jwt.decode (request.authorization,nil,false) @current_user =user.find (payload[' user_id ' ]) jw

When you use Httpsurlconnection to access HTTPS links, you typically need to introduce certificates, otherwise an exception will occur. But you can also use the method of trusting all certificates to achieve the purpose of the access. public class Sslutils {private static void Trustallhttpscertificates () throws Exception {trustmanager[] Trus Tallcerts = new Trustmanager[1]; TrustManager TM = new MiTM (); TRUSTALLCERTS[0] = T

= 121.193.143.249:80 Curl httpbin.org/ip { "origin": "121.193.143.249" } In Ipython interactive environments, HTTP requests may often need to be debugged temporarily, and can be implemented simply by setting up os.environ[' http_proxy ' to add/remove HTTP proxies. In [245]: os.environ[' http_proxy '] = ' 121.193.143.249:80 ' in [246]: Requests.get ("HTTP://HTTPBIN.ORG/IP"). JSON () out[246]: {U ' origin ': U ' 121.193.143.249 '} In [249]: os.environ[' http_proxy '] = ' in [to]: Requests.get (

research. The experimental environment is to run MSSQL Server 2012 on Windows Server 2014 R2, the workstation is to run MSSQL Management Studio 2014 on Windows 10, and the attacker is the new version of Kali 2.0 Linux. All systems are in the same subnet to simulate Intranet attacks. These settings are almost the same as those of my customers. This attack is called a man-in-the-middle (MITM) attack. A typical attack method is to perform some redirecti

the related vswitch configuration documents. 3. Principles and prevention of ARP spoofing/MITM (Man-In-The-Middle) Attacks 3.1 MITM (Man-In-The-Middle) attack principles According to the ARP protocol design, in order to reduce excessive ARP Data Communication on the network, a host, even if the received ARP response is not obtained by its own request, it will also insert it into its own ARP cache table, w

Nethunter is an Android penetration test platform built on Kali Linux for Nexus devices, which includes some special and unique features. Nethunter supports wireless 802.11 injection, one-click Mana ap Build, HID keyboard (class teensy attack) and Badusb MITM attack test. You only need to have a Nexus 5, Nexus 6, Nexus 7, Nexus 9, Nexus 10 or OnePlus to play.Functional characteristics802 . 11 Wireless Injection and AP mode support, support a variety o

ARP is a double-edged sword for the network. On the one hand, ARP is an indispensable protocol in network communication. It is like a programmer, which determines the data transmission path to a certain extent. On the other hand, it is easy to be used by attackers and plays an inappropriate role. Currently, ARP attacks are not at a low level. Although there are also a lot of related measures, it is difficult to prevent them. To solve this problem, Cisco has designed dynamic ARP detection technol

ARP is a double-edged sword for the network. On the one hand, ARP is an indispensable protocol in network communication. It is like a programmer, which determines the data transmission path to a certain extent. On the other hand, it is easy to be used by attackers and plays an inappropriate role. Currently, ARP attacks are not at a low level. Although there are also a lot of related measures, it is difficult to prevent them. To solve this problem, Cisco has designed dynamic ARP detection technol

alternative because basic authentication is too dangerous. However, it is only a substitute for basic authentication, because it is not very safe and has some weaknesses.(1) digest authentication can only be used as a permission authentication mechanism, rather than a confidentiality measure, because the message body is not encrypted. Qop uses "auth-int" to ensure that the message body is not modified and cannot be peeked.(2) Replay attack: attackers may intercept abstract information and then

Attacks and sniffing -M,--mitm ARP spoofing, parameter-m ARP Remote # bidirectional mode, while spoofing both sides of the communication,-M arp:remote. OneWay #单向模式, only ARP deceives the first target to the second target communication,-M arp:oneway. ICMP spoofing, parameter-M ICMP: (MAC/IP) DHCP spoofing, parameter-m DHCP: (IP_POOL/NETMASK/DNS), such as- m dhcp:192.168.0.30,35,50-60/255.

1. Prevention of Mac/cam attacks 　　 The principle and harm of 1.1mac/cam attack1.2 Typical viruses take advantage of mac/cam attack cases1.3 Using Port Security feature to protect against Mac/cam attacks1.4 Configuration1.5 using other techniques to prevent MAC/CAM attacks 　　 　　 2. Prevention of DHCP attacks 　　 2.1 Common issues with DHCP management:2.2DHCP Snooping Technology Overview2.3 Basic Precautions2.4 Advanced Precautions 　　 　　 3. ARP spoofing/MITM