Free tunnel software for linux

Major Features :

1. The Grdc main program:
   • A pure GTK+ 2.0 application!
   • Maintain a list of remote desktop files for most frequently used servers
   • Make quick connections by directly putting in the server name
   • Remote desktops with higher resolutions are scrollable in both window and fullscreen mode
   • Viewport fullscreen mode: remote desktop automatically scrolls when the mouse moves over the screen edge.
   • Floating toolbar in fullscreen mode, allows you to switch between modes, toggle keyboard grabbing, minimize, etc.
   • RDP protocol is supported by rdesktop; VNC protocol is supported by libvncclient.
2. The Grdc Gnome applet:
   • A Gnome desktop applet for easy-access of Grdc main features
   • List all remote desktop files and make the connection easily
   • Support remote desktop files grouping feature

Enhancements:

• Add Avahi support using libavahi-ui
• Option tstart a connection in view-only mode
• Enhanced command line arguments tsupport new grdc-applet features
• Black Scrolled Viewport border (Nikolay Botev)
• Better mouse cursor (both server and client side) (Nikolay Botev)
• Keyboard mapping option for rdesktop (RDP)
• VNC Chat feature
• Fix VNC desktop resize bug (Nikolay Botev)
• VNC Beep feature (Nikolay Botev)
• A SFTP client (stand-alone or integrate with SSH tunnel)
• SSH terminal feature integrated with SSH tunnel
• Add RDP options: Share folder, Startup program/path and Advanced arguments
• New Preference option Default View Mode
• Better default window size tmatch server resolution
• New VNC advanced option: Horizontal and Vertical scale
• Saved password is now encrypted
• Quick Connect protocol sub menus and connection protocol icons
• Support VNC keyboard mapping
• Fix VNC peer disconnect bug (Alex Chateau)
• Greek translation added by Elias Sofronas

Enhancements: Converted to work with Apache 2.2.x.

HTTPTunnel is a simple client/server application for creating an HTTP tunnel between two machines, optionally via a Web proxy.
This is a small application for tunnelling an arbitrary TCP socket connection over HTTP. It can be used, for example, to tunnel traffic out from behind a restrictive firewall that only allows outgoing HTTP web connections.
The basic idea is that you run an instance of the HTTP Tunnel application locally in client mode, that then connects out to another instance that you run at the remote end of the tunnel in server mode.
You then connect to the local client end of the tunnel with the application whose traffic you wish to tunnel, and all communications are then wrapped in HTTP. The tunnel may also go via a HTTP proxy, either explicitly or transparently.
Enhancements:
- This release includes some major bugfixes and improvements in the tunneling error detection and retransmission code.
- It also introduces support for building and running under Cygwin.

SSL-Explorer project is the worlds first open-source SSL VPN solution of its kind. This unique remote access solution provides users and businesses alike with a means of securely accessing network resources from outside the network perimeter using only a standard web browser.
SSL-based VPNs have become a hot topic in recent years. The benefits to productivity and the low maintenance overhead that comes with browser-based VPN solutions are something that cannot be overlooked by most businesses, though implementation costs can often be prohibitive.
In contrast to a conventional IPsec-based solution, no client side code needs to be installed on your end users systems. SSL VPNs rely on Javatm based technology and hence require only a standard web browser to operate.
Standard network protocols can be tunnelled through the SSL connection, meaning that email and intranet web/file resources are easily and securely accessible from outside the corporate network.
The use of SSL is highly beneficial in these circumstances since most firewall policies grant access to SSL traffic by default, meaning that no additional configuration is required. Our solution is not a firewall, but it effectively allows you to lock-down your network, leaving just a single port open on your firewall.
Enhancements:
Core
- Restart message is not prominent when a parameter is changed which requires a restart.
- A newly created resource should be seen instantly to logged in users without users having to log out and back in again.
- Name search does not escape invalid XML characters from the username.
- Name search is unable to find users with a space in the name.
- HTTP header injection exploit.
- Policies not listed in resource info tooltip.
- No Restart notification displayed when a valid license is installed after an invalid license upload fails.
- The SingleConnection tunnel command when creating extensions does not work with the false flag.
- Page table should provide each page in blocks of 10 items.
- Some system properties dissapear if an extension fails to upload.
- Sessions are not cleaned up after user disconnects.
- Group page GUI refactored.
- Status page GUI refactored.
- License manager page GUI refactored.
- Replacements option moved under web forwards.
- Replacement variables do not contain session:username and password in agent server proxy tab.
- Weak ciphers have been disabled for default configurations.
- Extension store fails to download plug-in dependencies.
- Access right page has strange 5000 resource type exists.
- Policy selection page contains redundant up and down button functionality.
- Creating a user then cancelling during password assignment.
- Creating applications with integer parameters are unable to use user attributes.
- Remote tunnels do not show in tunnel monitor.
- SSL-Tunnel source interface has no validation.
- Pressing cancel in profiles page when the session has timed out causes an exception if you try to press cancel again.
- Profiles page refactored.
- Checking a checkox in global profiles is unchecked after you change tabs.
- If you have a User and a Group with the same name, these cant both be assigned to a policy.
- Assigning a user which doesnt exist to a policy throws an exception.
- User cannot create an attribute even though they have been given the access rights to do so.
- Description is not a required field when creating an attribute.
- Filter does not work in attributes.
- Attributes page GUI refactored.
- Extension page GUI refactored.
- If a disabled extension has an update available the info page shows an exception.
- Password authentication scheme should be the only authentication scheme whenever prompted for re-authentication.
- Authentication scheme page GUI refactored.
- An authentication scheme should be allowed to be primary if a secondary scheme also exists.
- Redirection when canceling out of selecting an authentication scheme at logon is incorrect.
Installer
- Stepping back through the installer and changing the certificate type causes unusual behaviour during installation.
- Installation of extensions step in installer is irrelevant.
- Insallation progress bar added.
- Selecting All interfaces in the web server configuration step causes the service to fail.
Internationalization
- Selecting default language or disabling user selecting language do not work.

YXORP is a reverse proxy for the HTTP protocol. YXORPs main focus for YXORP is checking the validity of the traffic, i.e. what would be called application level firewalling or secure reverse proxy in commercial products.
It can check, validate, and change just about anything about a HTTP request or response, can load balance, and all other normal reversed proxy functions. YXORP aims to conform to RFC 2616, RFC 2518, RFC 2109 and other applicable standards.
A stable release is available; bugfixes to this version will be supplied.
YXORP is being developed on Linux (both i386 and x86_64). Other supported platforms include Solaris (Sparc and i386/x86_64), Mac OS X, and FreeBSD, but these are tested less frequently for development releases.
Main features:
- SSL support (including backend SSL)
- Full support for the HTTP 1.1 protocol
- On-line configuration and reconfiguration using XML configuration files
- Virtual hosting: several web sites can be handled by a single reverse proxy
- Rule based processing of requests: all requests can be allowed, rejected, or changed depending on rules
- Choice of fully checking reverse proxy (dissecting proxy) or low overhead tunnel
- Multiple listeners: one YXORP can monitor several TCP ports and process incoming traffic
- Load balancing over multiple servers, including automatic setting inservice and outservice, and redirection to "sorry" server pages if no server is available
- Sticky load balancing
- Use pcre instead of glibc regex
Whats New in 1.23.8 Stable Release:
- ssl locking error introduced by backport from development version fixed.
Whats New in 2.30 Development Release:
- corrected error in the reading of < digestauth > tags in the configuration
- include < !DOCTYPE > tag in the configuration
- added DTD for the configuration XML
- added attribute clearfilters to debug tag in config
- fixed incorrect setting of default portnumber on realserver tag. This caused problems if using a non-default portnumber while using the yxorprealserver command to change realserver status.

grml is a bootable CD (Live-CD) based on Knoppix and Debian. grml includes a collection of GNU/Linux software especially for users of texttools and system administrators. grml provides automatic hardware detection.
You can use grml for example as a rescue system, for analyzing systems/networks or as a working environment. It is not necessary to install anything to a harddisk, you dont even need a harddisk to run it.
Due to on-the-fly decompression grml includes about 2 GiB of software and documentation on the CD.
Main features:
- distribution for users of text tools and sysadmins
- debian and knoppix based distribution [use existing infrastructure]
- usability for visually handicapped people right out of the box
- small and geeky community
grml provides more than 1900 software packages. Excluding library stuff still more than 1400 packages remain. We dont ship KDE and OpenOffice but more than 700 packages Knoppix does not provide.
grml provides several scripts und utils which make live easier. zsh is configured with the completion mechanism. grml-x is a wrapper for using the X window system.
People from VC Graz for example can get a PPTP tunnel via calling the script grml-pptp-vcgraz (enter username and password - thats it!). Writing config files on the readonly filesystem is possible via running the script grml-bind.

VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption.
In order to compile VTun you need some software packages.
Main features:
- Encryption
- Compression
- Traffic shaping
- VPN
- Mobile IP
- IP tunnel (tun).
- Supports point-to-point IP tunnel.
- Ethernet tunnel (ether).
- Supports all protocols that work over Ethernet: IP,IPX,Appletalk,Bridge,...
- Serial tunnel (tty).
- Supports all protocols that work over serial lines: PPP,SLIP,...
- Pipe tunnel (pipe).
- Supports all programs that works over Unix pipes.
- VTun protocol over TCP.
- Allows to establish tunnels behind firewalls. Very reliable.
- VTun protocol over UDP.
- Fast and efficient protocol with small tunneling overhead.
- Deflate (zlib).
- Very efficient compression. Supported for TCP only.
- LZO (lzo).
- Super fast compression. Supported for UDP and TCP.
- Challenge based authentication.
- No clear text passwords.
- BlowFish 128 bits key.
- Fast efficient encryption with 128 bits MD5 hash keys.

Brutus is an Exchange connector and development framework that offers access to all of MAPI and therefore to all versions of Microsoft Exchange from version 5.5 onwards.
Brutus project is a complete wrapping of all of MAPI into a (large) set of CORBA interfaces. It enables any groupware client to integrate seamlessly into any organization with large Exchange deployments on an equal footing with MS Outlook.
Being based on CORBA, it is platform independent, and works equally well on Linux, the BSDs, Windows, or wherever there is a CORBA implementation available.
Enhancements:
- Logging of failure cases was generally improved.
- SSLIOP support has been removed.
- SSLIOP is no longer needed as Lorica will add CORBA firewall support as well as an SSLIOP tunnel between Brutus Server and any client application.
- MAPI object property scrambling was added.
- This is a new feature that makes it possible for an administrator to content scramble specific users.