1. Introduction The goal of this paper is to present my concept of a UNIX network security architecture based on the Internet connectivity model and Firewall approach to implementing security. This paper defines several layers of a firewall, which depict the layers of vulnerability. This paper also provides some subjective comments on some of the […]
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Anonymous FTP FAQ
How to Set up a Secure Anonymous FTP Site The following is a FAQ on setting up a secure FTP Site. FTP sites are known for much abuse by transferring illegal files. They also open many opportunities for intruders to gain access via misconfigured setups. And lastly many versions of ftp servers have had security […]
Active FTP vs. Passive FTP, a Definitive Explanation
Active FTP is beneficial to the FTP server admin, but detrimental to the client side admin. The FTP server attempts to make connections to random high ports on the client, which would almost certainly be blocked by a firewall on the client side. Passive FTP is beneficial to the client, but detrimental to the FTP […]
Connecting Braille Displays to Android Using BRLTTY
BRLTTY is a daemon for providing access to the Linux / Unix console via braille displays. However, this product may be of interest not only for technically advanced blind users of UNIX-like operating systems, but also for ordinary people using smartphones or tablets on the Android platform. The fact is that BRLTTY has a version in the form […]
How to Install FreeBSD? A Step by Step Guide
A Step-by-Step Guide to Installing FreeBSD 5.x This guide is designed for users with moderate Linux experience and will walk you through installing and setting up a fully updated FreeBSD 5.x system. FreeBSD is a powerful, Unix-like operating system known for its stability, performance, and advanced features. Let’s get started! A. FreeBSD 5.x vs 4.x […]
UNIX Hacking Tutorial
———————- o Intent: ———————- This phile is geared as an UNIX tutorial at first, to let you get more familiar with the operating system. UNIX is just an operating system, as is MS-DOS, AppleDOS, AmigaDOS, and others. UNIX happens to be a multi-user- multi-tasking system, thus bringing a need for security not found on MSDOS, […]
How to Hack UNIX for Beginners
In the following file, all references made to the name Unix, may also be substituted to the Xenix operating system. Brief history: Back in the early sixties, during the development of third generation computers at MIT, a group of programmers studying the potential of computers, discovered their ability of performing two or more tasks simultaneously. […]
How to Set up a Secure Anonymous FTP Site
1. General Description of Setting up an “anonymous” ftp server. Create the user ftp in /etc/passwd. Use a misc group. The user’s home directory will be ~ftp where ~ftp is the root you wish anonymous users to see. Creating this user turns on anonymous ftp.Use an invalid password and user shell for better security. The […]
How to (considerably) Speed up your internet connection under Linux and Windows
(Setting up DNS caching) 1 Good old dry theory 1.1 Introduction The internet is going thru an evolution, faster pc’s, more reliable connections etc… But the greatest evolution are the capacity of the lines. What where telephone line are now ISDN lines or cable modems. But there are still people (unfortunate people like me) who […]