[ 原始碼： knockd ]
套件：knockd（0.7-1 以及其他的）
small port-knock daemon
A port-knock server that listens to all traffic on a given network interface (only Ethernet and PPP are currently supported), looking for a special "knock" sequences of port-hits. A remote system makes these port-hits by sending a TCP (or UDP) packet to a port on the server. When the server detects a specific sequence of port-hits, it runs a command defined in its configuration file. This can be used to open up holes in a firewall for quick access.
其他與 knockd 有關的套件
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- dep: libc6 (>= 2.28)
- GNU C 函式庫：共用函式庫
同時作為一個虛擬套件由這些套件填實： libc6-udeb
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- dep: libpcap0.8 (>= 0.9.8)
- system interface for user-level packet capture
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- dep: logrotate
- 紀錄循環工具
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- dep: lsb-base (>= 3.0-6)
- Linux Standard Base init script functionality