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SYN cookie is a technique used to resist SYN flood attacks. The technique's primary inventor Daniel J. Bernstein defines SYN cookies as "particular choices of initial TCP sequence numbers by TCP servers." In particular, the use of SYN cookies allows a server to avoid dropping connections when the SYN queue fills up.
In computer networking, xinetd (Extended Internet Service Daemon) is an open-source super-server daemon which runs on many Unix-like systems, and manages Internet-based connectivity. [ 3 ] It offers a more secure alternative to the older inetd ("the Internet daemon"), which most modern Linux distributions have deprecated.
The Network Information Service, or NIS (originally called Yellow Pages or YP), is a client–server directory service protocol for distributing system configuration data such as user and host names between computers on a computer network. Sun Microsystems developed the NIS; the technology is licensed to virtually all other Unix vendors.
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 connections, which can consume enough resources to make the system unresponsive to legitimate traffic.
This is a comparison of commercial software in the field of file synchronization. These programs only provide full functionality with a payment. As indicated, some are trialware and provide functionality during a trial period; some are freemium, meaning that they have freeware editions.
In computer networking, TCP Fast Open (TFO) is an extension to speed up the opening of successive Transmission Control Protocol (TCP) connections between two endpoints. It works by using a TFO cookie (a TCP option), which is a cryptographic cookie stored on the client and set upon the initial connection with the server. [ 1 ]
zsync is an rsync-like tool optimized for many downloads per file version. zsync is used by Linux distributions such as Ubuntu [38] for distributing fast changing beta ISO image files. zsync uses the HTTP protocol and .zsync files with pre-calculated rolling hash to minimize server load yet permit diff transfer for network optimization.
Java (Solaris, Linux, Windows, OS X) Mobile Gateway No Yes Yes Yes Yes Yes Service Providers, OEMS, Enterprise, supports OMA CP, OMA DS Push, OMA EMN and IMAP IDLE Horde: Linux Horde Yes Yes Yes Yes Yes No Web Groupware, open source Access NetFront Sync Linux, Solaris SyncML Server No Yes Yes Yes Yes Yes Yes Enterprise sync solution eGroupWare: PHP