Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time



snf-vncauthproxy is a small gevent-based VNC proxy with man-in-the-middle authentication.

snf-vncauthproxy listens on a control channel (TCP socket) for control messages and sets up one-time port forwardings upon request. As soon as a client connects, vncauthproxy fakes an RFB 3.8 server to request authentication from the client. If the client authenticates successfully, a server connection is initiated by the proxy and both connections are bridged to allow transparent client-server communication.

Features include:

  • Lightweight, coroutine-based main loop with gevent
  • JSON-formatted requests and replies over the control channel
  • Port pooling for automatic selection of source port
  • Supports RFB protocol versions 3.3, 3.8
  • IPv4 and IPv6 support
  • Configurable timeout for client connections
  • Control channel over TCP, allowing isolated operation of VNC proxy clusters

Project Page

Please see the official Synnefo site and the latest snf-vncauthproxy docs for more information.

Copyright and license

Copyright (C) 2010-2014 GRNET S.A.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.


A small gevent-based VNC proxy with man-in-the-middle authentication.







No packages published