Fli4l

infobox OS



caption = Screenshot of the fli4l firewall configuration
developer = fli4l
website = [http://www.fli4l.de/ fli4l: Homepage]
source_model = Shared source
family = Debian GNU/Linux
latest_release_version = 3.0.4
latest_release_date = December 06 2007
kernel_type = Monolithic kernel (Linux)
ui = SSH, Web Browser
license = GPL
supported_platforms = i386, x86-64
working_state = Current

What is fli4l

fli4l (floppy ISDN for Linux) is a linux-based router software suitable for ISDN, DSL and ethernet. The default configuration easily fits on a 3.5" floppy disk. It runs on any x86-based computer - a 486 with 16MB of RAM is sufficient for most uses.

The bootable floppy disk can be created under Linux and Windows. No prior knowledge of Linux is necessary, the basic principles of networking however are a plus. Beginners are encouraged to have a look at the Quick-Start guide.

fli4l can be extended using several modules. For example, the official packages provide functionality to connect networks encrypted over the internet (VPN), filter potentially dangerous contents from websites visited (proxy) or use fli4l in a virtual machine (XEN). In addition to those packages it is easy for users with a certain level of Linux / Unix skills to extend fli4l using their own packages. There is also a Database at the fli4l site for such packages contributed by users.

Features

General

* Extensible
* Create the bootable floppy disk on Unix, Linux or Windows
* Supports 1680KB floppy disks
* System can be updated using the graphical client imonc on Windows and Linux
* Local DNS and DHCP servers
* Up-to-date networks interface drivers: Supports more than 40 different types
* Network-enabled imond server for monitoring and remote administration
* Network-enabled telmond server for monitoring incoming phone calls
* Execute commands on incoming phone calls (e.g. activate dial-in)
* Windows / Unix / Linux-Client imonc with support for imond and telmond

---

Routing

* Consistent interface to all WAN-interfaces using circuits
* Parallel use / routing of ISDN and DSL circuits
* Least-Cost-Routing: automatically select a provider based on time and day (only ISDN)
* Display / calculation / logging of connection intervals and costs

---

Firewall

* IP-Masquerading incl. stateful packet filtering with powerful configuration
* Flexible logging of access of certain ports
* Supports IP-Masquerading and Port-Forwarding

---

DSL

* Roaring Penguin PPPoE drivers, featuring Dial-on-Demand (can be disabled)
* PPTP for DSL connections in Austria (EXPERIMENTAL)
* Supports AVM-DSL cards---

ISDN

* Up-to-date HiSaX-driver: Supports more than 37 different types
* Support for AVM-ISDN cards
* Multiple ISDN connection types: in/out/callback, raw-ip/ppp
* Channel bundling: automatic bandwidth regulation or manual activation of second channel using Windows/Unix client
* optional IPX routing---

Additional packages

* OpenVPN to connect networks encrypted over the internet
* SSH login
* WLAN support incl. WEP / WPA / WPA2
* Mini-Web-Server for status display and management
* PCMCIA support
* Configuration of ISA-PNP-cards: isapnp tools
* Configuration of serial interface
* Emergency system to enable remote debugging over ISDN
* LCD display as monitor: Display of connection and transfer rates
* PPP server/router over serial interface
* ISDN-Modem-Emulator over serial interface
* Print server (Samba) over SMB- and lpr/lpd protocol
* Accessing time servers on the network

---

Hardware Requirements

The Minimum System Requirements:

* 486 CPU, at least DX2/66
* 12 MB RAM
* Ethernet network interface cards
* ISDN: ISDN card supported by HiSax or an AVM card
* floppy disk drive

See also

External links

* [http://www.fli4l.de/ The official fli4l home page]
* [http://fli4l.linuxportal.hu/ The official Hungary site]