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  2. firewalld - Wikipedia

    en.wikipedia.org/wiki/Firewalld

    It provides firewall features by acting as a front-end for the Linux kernel's netfilter framework. firewalld's current default backend is nftables. Prior to v0.6.0, iptables was the default backend. [3] Through its abstractions, firewalld acts as an alternative to nft and iptables command line programs.

  3. iptables - Wikipedia

    en.wikipedia.org/wiki/Iptables

    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.

  4. Netfilter - Wikipedia

    en.wikipedia.org/wiki/Netfilter

    Netfilter is a framework provided by the Linux kernel that allows various networking-related operations to be implemented in the form of customized handlers.Netfilter offers various functions and operations for packet filtering, network address translation, and port translation, which provide the functionality required for directing packets through a network and prohibiting packets from ...

  5. Disable third-party firewall software - AOL Help

    help.aol.com/articles/disable-third-party...

    4. On the left side of the window click Turn Windows Firewall on or off. 5. Under Customize settings for each type of network, in the Private network location settings and Public network settings sections, select the Turn off Windows Firewall (not recommended) option. 6. Click OK and close all open windows. 7. That's all !

  6. Uncomplicated Firewall - Wikipedia

    en.wikipedia.org/wiki/Uncomplicated_Firewall

    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. UFW is available by default in all Ubuntu installations since 8.04 LTS. [1]

  7. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    iChat server file transfer proxy [11] Unofficial: Oracle Cluster File System 2 [citation needed] Unofficial: Windows backdoor program tini.exe default [citation needed] Unofficial: Just Cause 2: Multiplayer Mod Server [citation needed] Unofficial: Terraria default server Unofficial: Unofficial: Super Foosball multiplayer gameplay port Unofficial

  8. List of GNU Core Utilities commands - Wikipedia

    en.wikipedia.org/wiki/List_of_GNU_Core_Utilities...

    Changes the permissions of a file or directory cp: Copies a file or directory dd: Copies and converts a file df: Shows disk free space on file systems dir: Is exactly like "ls -C -b". (Files are by default listed in columns and sorted vertically.) dircolors: Set up color for ls: install: Copies files and set attributes ln: Creates a link to a ...

  9. List of FTP commands - Wikipedia

    en.wikipedia.org/wiki/List_of_FTP_commands

    It includes all commands that are standardized by the Internet Engineering Task Force (IETF) in RFC 959, plus extensions. Note that most command-line FTP clients present their own non-standard set of commands to users. For example, GET is the common user command to download a file instead of the raw command RETR.