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Cache invalidation. Cache invalidation is a process in a computer system whereby entries in a cache are replaced or removed. It can be done explicitly, as part of a cache coherence protocol. In such a case, a processor changes a memory location and then invalidates the cached values of that memory location across the rest of the computer system.
Legitimate user Alice (purple) tries to connect, but the server refuses to open a connection, a denial of service. A SYN flood is a form of denial-of-service attack on data communications in which an attacker rapidly initiates a connection to a server without finalizing the connection. The server has to spend resources waiting for half-opened ...
Refraction networking. Refraction networking, also known as decoy routing, is a research anti-censorship approach that would allow users to circumvent a censor without using any individual proxy servers. [1] Instead, it implements proxy functionality at the core of partner networks, such as those of Internet service providers, outside the ...
Domain fronting. After TLS encryption is established, the HTTP header reroutes to another domain hosted on the same CDN. Domain fronting is a technique for Internet censorship circumvention that uses different domain names in different communication layers of an HTTPS connection to discreetly connect to a different target domain than is ...
Some DNS cache poisoning attacks do use the birthday paradox effect. They send out n requests at the same time along with n spoofed replies. Since the replies are all received at around the same time, you get the n^2 factor increase in success.
Smurf attack. A Smurf attack is a distributed denial-of-service attack in which large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP broadcast address. [1] Most devices on a network will, by default, respond to this by sending a reply to ...
EDNS Client Subnet. EDNS Client Subnet ( ECS) is an option in the Extension Mechanisms for DNS that allows a recursive DNS resolver to specify the subnetwork for the host or client on whose behalf it is making a DNS query. This is generally intended to help speed up the delivery of data from content delivery networks (CDNs), by allowing better ...
djbdns has never been vulnerable to the widespread cache poisoning vulnerability reported in July 2008, but it has been discovered that it is vulnerable to a related attack. [6] The source code has not been centrally managed since its release in 2001, and was released into the public domain in 2007. [7]