Remote activation of covert service channels

Details Remote activation of covert service channels Remote activation of covert service channels

2003-10-02

2008-05-27

Barroń, Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S154000, C726S003000, C709S229000

Reexamination Certificate

active

07380123

ABSTRACT:
Remote activation of covert service channels is provided. A remote host can initiate and establish a connection with a target host without exposing a service channel or communications port to an unauthenticated host. Triggers can be received by and sent to a host and an associated operating system, under direction of a stealth listener. The stealth listener provides can control and direct an operating system to respond to incoming data packets, but can also open and close ports to enable access to services on a host. Using a variety of transport mechanisms, protocols, and triggers to covertly enable a connection to be established between a service and a remote client, the disclosed techniques also enable reduction of processing and storage resources by reducing the amount of host or client-installed software.

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Martin Krzywinski, “Port Knocking; Summary of Port Knocking”, http://www.portknocking.org/. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; Features of Port Knocking”: http://www.portknocking.org/view/about/features. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; What is Port Forwarding”: http://www.portknocking.org/view/about/port—forwarding. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; What is Port Triggering”: http://www.portknocking.org/view/about/port—triggering. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; Port Knocking Requirements”: http://www.portknocking.org/view/about/requirements. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; Download; Perl”: http://www.portknocking.org/view/download/perl. According to archive.org, appears to have been published at least as soon as Jul. 26, 2003.
Martin Krzywinski, “Port Knocking; Port Knocking Lab; Lab Instructions”: http://www.portknocking.org/view/knocklab. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; Documentation; knockclient”: http://www.portknocking.org/view/documentation. According to archive.org, appears to have been published at least as soon as Jul. 26, 2003.
Martin Krzywinski, “Port Knocking; Documentation; knockdaemon”: http://www.portknocking.org/view/documentation/knockdaemon. According to archive.org, appears to have been published at least as soon as Jun. 18, 2003.
Martin Krzywinski, “Port Knocking; Documentation; readme”: http://www.portknocking.org/view/documentation/readme. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; FAQ; general”: http://www.portknocking.org/view/faq. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; FAQ; applications”: http://www.portknocking.org/view/faq/applications. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; FAQ; mechanism”: http://www.portknocking.org/view/faq/mechanism. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
Martin Krzywinski, “Port Knocking; FAQ; implementations”: http://www.portknocking.org/view/faq/implementations. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
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Martin Krzywinski, “Port Knocking; About; Obscurity”: http://www.portknocking.org/view/about/obscurity. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
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Martin Krzywinski, “Port Knocking; FAQ; Security”: http://www.portknocking.org/view/faq/security. According to archive.org, appears to have been published at least as soon as Jul. 18, 2003.
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Christian Borss, “Drop/Deny vs. Reject” Oct. 7, 2001 : http://www.lk.etc.tu-bs.de/lists/archiv/lug-bs/2001/msg05734.html.

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