Secure By Design: How Guardian Digital Secures EnGarde Secure Linux
ABSTRACT
What is EnGarde Secure Linux?
EnGarde Secure Linux is not just another "repackaged" Linux distribution, but a modern open source system built from the ground up to provide secure services in the threatening world of the modern Internet. EnGarde Secure Linux is the creation of Guardian Digital, Inc. a pioneer in open source security since 1999, and has been developed since then in collaboration with the worldwide community of open source security enthusiasts and professionals. Guardian Digital provides a secure and consistent environment for EnGarde Secure Linux through the Guardian Digital WebTool and the Guardian Digital Secure Network. A server-only system, EnGarde Secure Linux is administered securely and remotely using the WebTool, a custom interface that both simplifies server administration and guides the system user in maintaining a secure configurations for all of the services that comprise EnGarde. The Guardian Digital Secure Network maintains the consistency and security of EnGarde by providing system upgrades and security patches that have been constructed by Guardian Digital's engineering team to relieve the user of the burden of maintaining the system in a consistent and secure state.
Defense In Depth In EnGarde Secure Linux
Security is the primary consideration in designing every element of EnGarde Secure Linux. Guardian Digital applies basic security principles like "least privilege", "no unnecessary services" and "default-deny" rules to every level of EnGarde from access to kernel itself to defense of the network perimeter. Security begins with the selection of the best available open source packages, chosen and tailored for maximum security and following software security best-practices. The next level of protection comes from a complete re-engineering of the standard Linux security model using Security Enhanced Linux (SELinux). SELinux implements the principle of "Mandatory Access Control" which places each program and process under the control of its own SELinux policy, limiting its access to files and resources and effectively containing any intrusions or compromises. EnGarde Secure Linux builds on this secure foundation by placing all administration of EnGarde and its services under the control of the Guardian Digital WebTool. The Guardian Digital WebTool is a secure, remote graphical administration interface that is carefully tailored, not just to simplify administration, but to help maintain secure practices and configurations. For example, EnGarde, through the WebTool, limits user and IP access by default for most services like FTP file transfers and POP/IMAP mail retrieval. For services that must be publicly accessible like Web service and mail transport, the WebTool offers simple setup of SSL-enabled encrypted services. The WebTool also mandates secure practices like encrypted passwords and prevents hazardous configurations like open mail relays. EnGarde Secure Linux extends its secure environment through the use of a carefully integrated selection of the best open source security tools for detecting compromises and intrusions at all levels. EnGarde generates special security-focused system logs to help the administrator identify potential compromises, and adds to this host-based intrusion detection tools. EnGarde monitors the system for potential network compromises and intrusions using the open source Snort intrusion detection system, adding its own NetDiff port status monitoring software.
Summary
Linux and open source systems have long been renowned for their stability, versatility and scalability. EnGarde Secure Linux adds the feature crucial to providing services on the modern Internet -- security. Guardian Digital builds security into every element of EnGarde by selecting the best available open source tools and services available and configuring them with security as the top priority. Recognizing that security can only be maintained in a consistent and stable environment, Guardian Digital relieves the user of the burden of "hardening" the system and following secure practices by designing secure administration into its WebTool and by updating and securing the system through the Guardian Digital Secure Network. For an in-depth exploration of the EnGarde Secure Linux security environment, see the full version of this document at "Secure By Design" full text
Source: Suhas Desai - Posted by Benjamin D. Thomas
In this paper, we describe the integration of
fingerprint template and RF smart card for clustered
network, which is designed on Linux platform and Open
source technology to obtain biometrics security. Combination
of smart card and biometrics has achieved in two step
authentication where smart card authentication is based on a
Personal Identification Number (PIN) and the card holder is
authenticated using the biometrics template stored in the smart
card that is based on the fingerprint verification. The
fingerprint verification has to be executed on central host
server for security purposes. Protocol designed allows
controlling entire parameters of smart security controller like
PIN options, Reader delay, real-time clock, alarm option and
cardholder access conditions.
The RF Smart Card and card reader/writer were
developed to handle payment transaction for public
transportation systems. These contact less cards have
security features, such as encrypted RF transmission mutual
authentication, and security keys. The RF smart card has
up to 16 separate sectors, which can be configured as purses
or for general data storage. The first sector is typically used
as a directory for the rest of the card, leaving 15 segments
available for data or purses.
Each sector has two keys, called the A and B keys,
allowing different access privileges to that sector. These key
pairs can be designated as read and read/write, or decrement
and increment/decrement .For example this would allow
turnstile readers with the A key to only deduct value from a
card sector, while smart card readers with the B keys could
either add or subtract value .The card also has a 32-bit
unique random number, which is permanently encoded into
each chip by the chip manufacturer.
Public key infrastructure (PKI) based systems are used to
construct a secure system that can achieve secure access
conditions. They are consequently being used to carry keys
and store personal information in applications such student
identification systems.
Source: Suhas Desai - Posted by Benjamin D. Thomas
A packet sniffer is a program which monitors network traffic which passes through your computer. A packet sniffer which runs on your PC connected to the internet using a modem, can tell you your current IP address as well as the IP addresses of the web servers whose sites you are visiting.
Source: Blessen Cherian - Posted by Blessen Cherian
In this article I am trying to explain what DDOS is and how it can be prevented. DDOS happens due to lack of security awareness of the network/server owners. On a daily basis we hear that a particular machine is under DDOS attack or NOC has unplugged the machine due to DDOS attack . So DDOS has become one of the common issues in this electronics world. DDOS is like a disease which doesn't have an anti-viral developed. So we should be carefull while dealing with it . Never take it lightly. In this article i am trying to explain the steps/measures which will help us defend from DDOS attack ,up to a certain extend .
In this article I would like to describe how care for a human body is similar to a server. It is a globally accepted fact that everything is interrelated to each other in this world in one way or the other. Let me try to prove it in the case of a human body and a human built server.
