LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ and GPLv2+ with exceptions and BSD and Inner-Net-2.0 and ISC and Public Domain and GFDL-1.3-only
Userspace tools for interacting with the Connection Tracking System
The conntrack-tools are a set of userspace tools for Linux that allow system administrators interact with the Connection Tracking System, which is the module that provides stateful packet inspection for iptables.The tools can be used to search, list,inspect and maintain the connection tracking subsystem of the Linux kernel. The conntrack-tools are the userspace daemon conntrackd and the command line interface conntrack.
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systemd is a system and service manager that runs as PID 1 and starts the rest of the system.
The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
libnetfilter_conntrack is a userspace library providing a programming interface (API) to the in-kernel connection tracking state table. This library is currently used by conntrack-tools among many other applications.
A minimalistic user-space library oriented to netlink developers.
libmnl is a minimalistic user-space library oriented to Netlink developers. There are a lot of common tasks in parsing, validating, constructing of both the Netlink header and TLVs that are repetitive and easy to get wrong. This library aims to provide simple helpers that allows you to re-use code and to avoid re-inventing the wheel.
libnetfilter_queue is a userspace library providing an API to packets that have been queued by the kernel packet filter. It is is part of a system that deprecates the old ip_queue / libipq mechanism. libnetfilter_queue has been previously known as libnfnetlink_queue.
Netfilter/conntrack Timeout policy tuning
libnetfilter_cttimeout is the userspace library that provides the programming interface to the fine-grain connection tracking timeout infrastructure. With this library, you can create, update and delete timeout policies that can be attached to traffic flows. This library is used by conntrack-tools
Library providing programming interface to the user-space helper infrastructure.
libnetfilter_cthelper is the userspace library that provides the programming interface to \ the user-space helper infrastructure available since Linux kernel 3.6. With this library, \ you register, configure, enable and disable user-space helpers.
A set of basic GNU tools commonly used in shell scripts
These are the GNU core utilities. This package is the combination of the old GNU fileutils, sh-utils, and textutils packages.
Bash is the GNU Project's shell. Bash is the Bourne Again SHell. Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh). It is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard. It offers functional improvements over sh for both programming and interactive use. In addition, most sh scripts can be run by Bash without modification.
libnfnetlink is the low-level library for netfilter related kernel/userspace communication. It provides a generic messaging infrastructure for in-kernel netfilter subsystems (such as nfnetlink_log, nfnetlink_queue, nfnetlink_conntrack) and their respective users and/or management tools in userspace.