Free 2.4.x software for linux

v9fs provides a Plan 9 9P2000 resource sharing protocol for the Linux 2.6 kernel. This can be used to share files, devices, /proc, /sys, etc.
It also works with Plan 9 file servers, and can be used to mount synthetic file systems from Plan 9 applications (see the plan9port project).
Includes kernel modules for Linux 2.4.x and 2.6.x kernels.
Enhancements:
- More responses were made to LKML comments.
- Fixes were made to transport.
- An fd transport method was added.
- This release was fully merged with Linux 2.6.13.

ipset pakcage is a framework inside the Linux 2.4.x and 2.6.x kernel, which can be administered by the ipset utility.
Depending on the type, currently an IP set may store IP addresses, (TCP/UDP) port numbers or IP addresses with MAC addresses in a way, which ensures lightning speed when matching an entry against a set.
If you want to:
store multiple IP addresses or port numbers and match against the collection by iptables at one swoop
dynamically update iptables rules against IP addresses or ports without performance penalty
express complex IP address and ports based rulesets with one single iptables rule and benefit from the speed of IP sets
then ipset may be the proper tool for you.
Main features:
ipmap
- The ipmap set type uses a memory range, where each bit represents one IP address and can store up to 65535 (B-class network) entries. You can store same size network addresses in an ipset as well and an IP address will be in the set if the network address it belongs to can be found in the set.
macipmap
- The macipmap set type uses a memory range, where each 8 bytes represents one IP and a MAC addresses. A macipmap set type can store up to 65535 (B-class network) IP addresses with MAC.
portmap
- The portmap set type uses a memory range, where each bit represents one port. A portmap type of set can store up to 65535 ports.
iphash
- The iphash set type uses a hash to store IP addresses where clashing is resolved by double-hashing and, as a last resort, by dynamically growing the hash. Same size network addresses can be stored in an iphash as well.
nethash
- The nethash set type also uses a hash to store CIDR netblocks, which may be of different sizes. The same techique is used to avoid clashes as at the iphash set type.
iptree
- The iptree set type uses a tree to store IP addresses, optionally with timeout values.
Bindings
IP sets allows you to bind an entry in a set to another set, which forms a relationship between the set element and the set it is bound to. The sets may have a default binding, which is valid for every set element for which there is no binding defined at all.
The bindings have no special meaning at the set level. However, you can benefit from them when using the set match of iptables. The set match will follow the bindings and will return a true (matched) value only if the packet parameters match all bindings it found.
Lets see an example:
# ipmap set storing the IP addresses of two machines
ipset -N servers ipmap --network 192.168.0.0/16
ipset -A servers 192.168.0.1
ipset -A servers 192.168.0.2
# portmap set storing the allowed ports for 192.168.0.2
ipset -N ports portmap --from 1 --to 1024
ipset -A ports 21
ipset -A ports 22
ipset -A ports 25
# Binding, which attaches ports to 192.168.0.2
ipset -B servers 192.168.0.2 -b ports
# iptables rule using the set match
...
iptables -A FORWARD -m set --set servers dst,dst -j ACCEPT
iptables -A FORWARD -j DROP
Now according to the iptables rules, sets and binding, the firewall will allow trough packets destined to any port on 192.168.0.1, while for 192.168.0.2 only the ports 21, 22 and 25 will be reachable.

ROX-Filer is a fast and powerful graphical file manager for the X Window System.
You can use ROX-Filer as a small and fast filer within your current desktop......or get it to manage your pinboard, panels and applications.
Main features:
- Fast scanning of directories (in the background),
- Uncluttered display (popup menus are used throughout),
- Background file operations (copy, move, link, delete, permissions, find),
- Powerful expression-based find feature with on-line quick reference (eg mtime after 2 days ago and size > 10Mb finds files based on their modification time and size)
- Mounts and unmounts filesystems (just Shift-Click on the mount point),
- Supports the XDND protocol, which provides for drag-and-drop file loading, and the new XDS extension which allows drag-and-drop saving,
- VfS support allows browsing around inside zip files (and other types of archive),
- Fully configurable from the Options dialog box,
- User-defined key bindings for all menu entries,
- A pop-up minibuffer allows navigating the filesystem using shell-style tab completion,
- The minibuffer can also be used for quickly entering shell commands,
- Full manual provided (HTML format),
Other features:
XDND
A common drag-and-drop protocol used, for example, by the GNOME desktop[GNOME]. This allows data to be loaded into an application by dragging it from a filer window to a program. The full specification is given in [DND].
XDS
An extension to XDND that allows applications to save data by dragging an icon back to a filer window. The full specification is given in [XDS].
Choices
A simple, but flexible, system for managing user choices. See [Choices] for details.
Application directories
Self contained relocatable applications, where installation is as simple as copying it to where you want it and uninstalling it is just a matter of deleting a directory. Described later in this documentation.
Thumbnails
The filer can be made to display image files by using the image itself for the icon, instead of a generic `this-is-an-image icon. Very useful for organising a directory full of photos! See [Thumbs] for details (spec is still in developement).
Shared MIME Info Database
In the past, each desktop had its own database of rules for determining the type of files. The Shared MIME Info Database[SharedMIME] unifies these into a single system shared by all desktops.
Icon Themes
Collections of file icons, called themes, can be installed (eg, to `~/.icons). You can switch between themes in the Options box. Once other desktops support this fully, themes will be sharable between desktops.
DNotify support (Linux only)
If used with a recent Linux kernel (2.4.x series), the filer will notice changes to directories automatically. On other systems, directories will update when the pointer is moved over them.
Enhancements:
- Some problems with session management were fixed.
- This makes it easier to use ROX-Filer with gnome-session and similar software.
- When creating thumbnails, this release can use a thumbnail embedded in an EXIF image, which speeds things up.
- A couple of build problems were fixed.

AVFS is a system, which enables all programs to look inside gzip, tar, zip, etc. files or view remote (ftp, http, dav, etc.) files, without recompiling the programs.
It currently supports floppies, tar and gzip files, zip, bzip2, ar and rar files, ftp sessions, http, webdav, rsh/rcp, ssh/scp. Quite a few other handlers are implemented with the Midnight Commanders external FS.
AVFS can be installed in two ways. These are:
Avfscoda
This method in theory works on any Linux system which has the
coda filesystem compiled in the kernel or as a kernel module.
In practice it works best with glibc-6.1 or higher, and it has
been tested on 2.2.X and 2.4.X kernels.
Preload
Currently this works on solaris systems. There are problems
making the preload method work for GLIBC version 6.1 or
higher, so systems using GLIBC are not supported.
Using AVFS is very similar in both cases. Differences will be indicated.
The installation method is different. For installation instructions
see the files INSTALL.preload and INSTALL.avfscoda respectively.
Enhancements:
- utar supports long names in POSIX ustar archives
- fixed truncation of 100 byte long file names in tar archive
- fixed crash in zlib code
- fixed deadlock in extfs code
- updated bzlib to 1.0.3
- updated avfsd to use fuse API version 26
several extfs fixes:
- fixed ucpio script
- fixed bug in extfs symlink handling (patch from Tanmoy Bhattacharya)
- fixed ftplist to output correct symlinks and to support http/ssh (patch from Tanmoy Bhattacharya)
- extfs scripts rpm and trpm outputs correct file sizes (important for fuse) (patch from Tanmoy Bhattacharya)
- ftppass/davpass checks for additional base avfs directories. Environment variable AVFSBASE can be set for non-default directory. (patch from Tanmoy Bhattacharya)
- ftp module supports @ in usernames (patch from Tanmoy Bhattacharya)
- the avfs library is built and installed by default additionally to fuse/avfscoda/preload depending on the actual system
- added RPM spec file for avfs-fuse (patch from Tanmoy Bhattacharya)

AODV-UU (Ad-hoc On-demand Distance Vector Routing, from Uppsala University) is a routing protocol under investigation by the IETF for use in ad-hoc networks, where both end-users and routers are mobile.
AODV-UU supports IPv6 and multicasting (with the appropriate patch) and is compliant with RFC 3561.
Main features:
- Runs on Linux 2.4.x kernels and in the ns-2 simulator.
- Crosscompiling for ARM based devices like the iPAQ and Zaurus is supported.
- Complies with RFC3561
- Implemented as a user-space daemon and requires NO kernel modifications.
- Easy to compile, install and run.
- Optional unidirectional link detection and avoidance (not specified in draft).
- Multiple network interfaces support.
- (Multiple) Gateway support through tunneling.

iptables and netfilter are building blocks of a framework inside the Linux 2.4.x and 2.6.x kernel. This framework enables packet filtering, network addresss [and port] translation (NA[P]T) and other packet mangling. It is the re-designed and heavily improved successor of the previous Linux 2.2.x ipchains and Linux 2.0.x ipfwadm systems.
iptables is a generic table structure for the definition of rulesets. Each rule within an IP table consists out of a number of classifiers (iptables matches) and one connected action (iptables target).
netfilter, iptables and the connection tracking as well as the NAT subsystem together build the whole framework.
Main features:
- stateless packet filtering (IPv4 and IPv6)
- stateful packet filtering (IPv4)
- all kinds of network address and port translation (NAT/NAPT)
- flexible and extensible infrastructure
- multiple layers of APIs for 3rd party extensions
- large number of plugins/modules kept in patch-o-matic repository

links2world Firewall is a very simple tool writen in C, that helps you generate iptables rules for Linux 2.4.x and newer kernels. Released under GNU General Public License, it is very easy to configure and designed to run on hosts with one or more network interfaces.
Furthermore, they are able to generate iptables rulesets for one or maximum two network interfaces.
Most of the existing iptables script generators are shell scripts. You have to dig in and to look through entire script in order to customize and configure it for your needs.
On the other hand, links2world Firewall uses a very human readable configuration file that is very easy to understand and write. Still more, it does not matter if you have one, two, three or twenty network interfaces, links2world Firewall is able to generate statefull iptables rulesets able to control the packet flows between all the networks your machine is connected to.
Enhancements:
- minor fixes that solved compilation errors when using older compiles