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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for July 4th, 2017

Tunneling over WebSockets

Posted by jpluimers on 2017/07/04

Just found out about these interesting links I had loved to use years ago, but alas, now I know (:

  • How HTML5 Web Sockets Interact With Proxy Servers
  • Vpn-ws – A VPN system over websockets | Hacker News

It looks similar to SSL VPN sometimes also called WebVPN:

  • [Full-disclosure] SSL VPNs and security
  • SSL-VPN – Wikipedia

Then there are non-VPN tunnels through WebSockets:

  • covertcodes/multitun: Tunnel arbitrary traffic through an innocuous WebSocket. Clients can ‘see’ each other, resulting in a stealth WebSocket VPN.
  • mhzed/wstunnel: tunnel over websocket

Since WebSockets can run over a proxy server you could route any kind of binary traffic through them even in places that disallow non-web protocols or layer-7 inspect https traffic.

Although ops might restrict stuff even further:

  • firewalls – How does a network admin block the reverse SSH in company? – Information Security Stack Exchange
  • SSH across a Layer 7 Filter · System Overlord

–jeroen

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Posted in Internet, Network-and-equipment, Power User, VPN | Leave a Comment »

MarcoDelphiBooks on GitHub

Posted by jpluimers on 2017/07/04

Just in case I need any of them: now in chronological order.

MarcoDelphiBooks – http://www.marcocantu.com

  • ObjectPascalHandbook
  • MasteringDelphi3
  • MasteringDelphi4
  • MasteringDelphi5
  • MasteringDelphi6 
  • MasteringDelphi7
  • MasteringDelphi2005
  • Delphi2007Handbook
  • Delphi2009Handbook
  • Delphi2010Handbook
  • DelphiXEHandbook

Source: MarcoDelphiBooks

–jeroen

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Posted in Delphi, Delphi 2005, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Delphi 7, Delphi XE, Development, Software Development | Leave a Comment »

 
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