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Decrypt PROLiNK ADSL Modem Configuration File To Reveal Backdoor

I was recently asked by a friend to examine the settings on a PROLiNK ADSL2 router modem, model PRS1241B, to see if the performance of the modem could be improved as he was having trouble using it for video conferencing. PROLiNK is a brand of Fida International (S) Pte Ltd, a Singapore-based company founded in 1991, that produces a wide range of consumer technology products including a range of ADSL modems and routers. As usual, I wished to make a backup of the current user-configurable settings before modifying any user configurable settings. PROLiNK makes this an easy task to accomplish

Exploring Cisco UCS Emulator Internals

Cisco UCS (Unified Computing System, codenamed Project California during development) was introduced in 2009. It was originally developed as a data center server technology optimized for VMware virtualization workloads, but nowadays is used in many mid-size and large enterprises. One of the key advantages of UCS from a system administration perspective is the radical reduction in system management points to a single management point called the UCS Manager (UCSM) which is implemented as an NX-OS kernel module in a Cisco Nexus 6000 series Fabric Interconnect (FI) switch. A FI is essentially a Top-Of-Rack switch as far as UCS is concerned.


NETCONF (Network Configuration Protocol) is a network management protocol developed and standardized by the IETF Netconf Working Group. It was first published in December 2006 as RFC 4741 with a revised version published in June 2011 as RFC 6241. It provides mechanisms to install, manipulate, and delete the configuration of network devices. The same IETF Working Group also produced supporting RFCs for various transport mappings, including: RFC 4742 – Using the NETCONF Configuration Protocol over Secure SHell (SSH). Obsoleted by RFC 6242 (2011) which introduced a new framing mechanism to address some potential security issues with the initial design RFC

PackageKit D-Bus Abstraction Layer

PackageKit uses an abstraction layer to allow a session user to manage software packages in a secure way. This abstraction layer is based on D-Bus. Essentially, it is a set of APIs exported through a D-Bus interface. Glib, qt and python and other language bindings are available. This abstraction layer enables applications to perform high-level package operations such as add or remove a package without having to know much about package management. PolicyKit (AKA PolKit) is incorporated to provide a fine grained policy mechanism for users. D-Bus has two connections types (buses): System and Session. System interfaces normally run as

OpenLMI - Open Linux Management Interface

According to the OpenLMI project webpage: OpenLPI provides a common infrastructure for the management of Linux systems. Capabilities include configuration, management and monitoring of hardware, operating systems, and system services. OpenLMI includes a set of services that can be accessed both locally and remotely, multiple language bindings, standard APIs, and standard scripting interfaces. OpenLMI is a another attempt by Red Hat to provide unified management of Linux systems. This is not their first attempt to provide such functionality. Their previous (failed) attempt back in the 2010/2011 era was called Matahari and was based on Apache Qpid QMF (AMQP Messaging –