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iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in a set of tables, which contain chains of rules for how to treat network traffic packets.
In computing, netstat is a command-line network utility that displays open network sockets, routing tables, and a number of network interface (network interface controller or software-defined network interface) and network protocol statistics.
Display server Software license Language Libraries Operating systems Type Remarks Protocol Other Linux BSDs Other COSMIC Shell: GPLv3: Rust: Smithay: Iced: Yes: No: No: Modern-style window compositing: Designed for Pop!_OS: Enlightenment: BSD license: C: libwayland-server (MIT License) EFL: Yes: Yes: POSIX: Modern-style window compositing ...
In computing, SPICE (the Simple Protocol for Independent Computing Environments) is a remote-display system built for virtual environments which allows users to view a computing "desktop" environment – not only on its computer-server machine, but also from anywhere on the Internet – using a wide variety of machine architectures.
IPFire is a hardened [3] open source Linux distribution that primarily performs as a router and a firewall; a standalone firewall system with a web-based management console for configuration. IPFire originally started as a fork of IPCop [ 4 ] and has been rewritten on basis of Linux From Scratch since version 2. [ 5 ]
Uncomplicated Firewall (UFW) is a program for managing a netfilter firewall designed to be easy to use. It uses a command-line interface consisting of a small number of simple commands, and uses iptables for configuration.
The iptables-translate tool can be used to translate many existing iptables rules to equivalent nftables rules. [ 4 ] [ 5 ] Debian 10 (Buster) , among other Linux distributions , uses nftables along with iptables-translate as the default packet filtering backend.
A server can determine that a given mail message is spam, e.g. because it was addressed to a spam trap, or after trusted users' reports. The server may decide that the IP address responsible for submitting the message deserves tarpitting. Cross-checking against available DNSBLs can help to avoid including innocent forwarders in the tarpit database.