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In computer networking, port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of prespecified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent the connection attempts to connect over specific port(s).
A port knock setup needs a firewall that logs every port access, a daemon which has means to change the firewall rules (!), and, depending on how complex the knock sequences should be, cryptographic hash generators, handling of multiple knock attempts coming in at the same time, etc.
Knocking (2021 film), a Swedish thriller film "Knockin'" (song), by Spanish band Double Vision (1995) Engine knocking, or the sound accompanying automotive combustion malfunction; Port knocking, a covert method of opening a port on a server; Roof knocking, a bombing practice of the Israeli Defense Forces; Gene knockin, genetic engineering method
When an outbound connection from a private endpoint passes through a firewall, it receives a public endpoint (public IP address and port number), and the firewall translates traffic between them. Until the connection is closed, the client and server communicate through the public endpoint, and the firewall directs traffic appropriately.
Chữ khoa đẩu is a term claimed by the Vietnamese pseudohistorian Đỗ Văn Xuyền to be an ancient, pre-Sinitic script for the Vietnamese language. Đỗ Văn Xuyền's works supposedly shows the script have been in use during the Hồng Bàng period, and it is believed to have disappeared later during the Chinese domination of Vietnam .
The Vietnamese Wikipedia initially went online in November 2002, with a front page and an article about the Internet Society.The project received little attention and did not begin to receive significant contributions until it was "restarted" in October 2003 [3] and the newer, Unicode-capable MediaWiki software was installed soon after.
Nguyễn Cao Kỳ (Vietnamese pronunciation: [ŋwiən˦ˀ˥ kaːw˧˧ ki˨˩] ⓘ; 8 September 1930 – 23 July 2011) [1] [2] was a South Vietnamese military officer and politician who served as the chief of the Republic of Vietnam Air Force in the 1960s, before leading the nation as the prime minister of South Vietnam in a military junta from 1965 to 1967.
Consequently, as control of different places and regions has shifted among China, Vietnam, and other Southeast Asian countries, the Vietnamese names for places can sometimes differ from the names residents of aforementioned places use, although nowadays it has become more common for the Vietnamese names of places to simply be Vietnamese ...