Un firewall é un sistema destinato a prevenire accessi non autorizzati ad una rete privata (che può essere anche una singola macchina) o provenienti da essa. Il firewall può essere realizzato mediante hardware, software o da una combinazione. I firewall sono frequentemente impiegati per impedire ad utenti di internet non autorizzati di connettersi a reti private collegate con internet, specialmente reti intranet. Tutti i pacchetti in entrata ed in uscita dalla intranet passano attraversano il firewall che esamina ogni pacchetto e ne permette l'ingresso, ne permette il transito, oppure lo nega ai pacchetti in base a criteri di sicurezza specificati.
Ci sono molti post nei forums riguardo alle differenti applicazioni firewall e scripts, così sono stati riuniti qui in un'unica pagina - perfavore aggiungete i vostri commenti riguardo ad ogni firewall, specialmente facilità d'uso e controlli di sicurezza in Shields Up
The Linux kernel itself has very powerful firewall called iptables. Other firewalls are usually just frontends.
See the iptables article for more information.
- Simple stateful firewall
- man iptables http://unixhelp.ed.ac.uk/CGI/man-cgi?iptables+8
Arno's IPTABLES Firewall Script is a secure firewall for both single and multi-homed machines.
- EASY to configure and highly customizable
- daemon script included
- a filter script that makes your firewall log more readable
- NAT and SNAT
- port forwarding
- ADSL ethernet modems with both static and dynamically assigned IPs
- MAC address filtering
- stealth port scan detection
- DMZ and DMZ-2-LAN forwarding
- protection against SYN/ICMP flooding
- extensive user definable logging with rate limiting to prevent log flooding
- all IP protocols and VPNs such as IPSec
- plugin support to add extra features.
ferm (which stands for "For Easy Rule Making") is a tool to maintain complex firewalls, without having the trouble to rewrite the complex rules over and over again. ferm allows the entire firewall rule set to be stored in a separate file, and to be loaded with one command. The firewall configuration resembles structured programming-like language, which can contain levels and lists.
FireHOL is a language to express firewalling rules, not just a script that produces some kind of a firewall. It makes building even sophisticated firewalls easy - the way you want it. The result is actually iptables rules.
Template:Codeline is available in the community repository.
Firetable is an iptables-based firewall with "human readable" syntax.
gShieldTemplate:Linkrot is a really simple iptables configuration system. (Nothing to do with gnome) Easy to configure, blocks everything not needed (almost) by default. Controlled by only one configuration file. It gave me all stealth on grc.com
- Easy to configure
- Only one configuration file
- Will give you a iptables configuration, which is the best firewall
- No GUI
The Shoreline Firewall, more commonly known as "Shorewall", is high-level tool for configuring Netfilter. You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall reads those configuration files and with the help of the iptables utility, Shorewall configures Netfilter to match your requirements. Shorewall can be used on a dedicated firewall system, a multi-function gateway/router/server or on a standalone GNU/Linux system. Shorewall does not use Netfilter's ipchains compatibility mode and can thus take advantage of Netfilter's connection state tracking capabilities.
ufw (uncomplicated firewall) is a simple frontend for iptables and is available in [community].
See Uncomplicated Firewall for more information.
Vuurmuur Vuurmuur is a powerful firewall manager built on top of iptables. It has a simple and easy to learn configuration that allows both simple and complex configurations. The configuration can be fully configured through an ncurses GUI, which allows secure remote administration through SSH or on the console. Vuurmuur supports traffic shaping, has powerful monitoring features, which allow the administrator to look at the logs, connections and bandwidth usage in realtime.
Firestarter is a good GUI for iptables writen on GTK2, it has the ability to use both white and black lists for regulating traffic, it is very simple and easy to use, with good documentation available on their website.
Firestarter has gnome dependencies and is available in AUR.
Guarddog is a really easy to use GUI for configuring iptables. After setting up a basic desktop configuration it passes all Shields Up tests perfectly.
Guarddog requires kdelibs3 and is available in the AUR repository.
To have the firewall settings applied at bootup you must run /etc/rc.firewall from inside /etc/rc.local or something similar.
Uncomplicated firewall frontends
KMyFirewall is KDE3 GUI for iptables.
Firewall editing capabilities are simple enough to use to be suitable for beginners, but also allow for sophisticated tweaking of the firewall settings.
KMyFirewall requires kdelibs3 and is available in AUR.
Firewall Builder is "a GUI firewall configuration and management tool that supports iptables (netfilter), ipfilter, pf, ipfw, Cisco PIX (FWSM, ASA) and Cisco routers extended access lists. [...] The program runs on Linux, FreeBSD, OpenBSD, Windows and Mac OS X and can manage both local and remote firewalls." Source: http://www.fwbuilder.org/