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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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77

Enhancing Linux Networking With Layered Security Techniques

If you want to leave certain nice to do's or ease of use functionality available to your self such as leaving SSH open only to root or having a machine with anonymous FTP access available, then take a slightly different approach to securing your environment (or those particular machines): layered security. Without changing the physical layout of your network, change the network layout using iptables and/or tcp wrappers. . This is essentially saying that all traffic that you want to funnel to Server II or Server III will now go through server I. This can be used in a variety of ways. Let The link for this article located at Eric Lubow is no longer available. . In Linux environments, balancing solid security with user convenience is challenging. Layered strategies enhance system integrity while keeping workflows seamless.. Linux Security Strategies, Layered Security, Network Configuration. . LinuxSecurity.com Team

Calendar 2 Feb 06, 2007 User Avatar LinuxSecurity.com Team Server Security
74

Case Study: Protecting FTP Server Security Against Unauthorized Access

A week before publishing this paper, I opened an anonymous ftp site on my home machine, expecting a few connections. I also wanted to see what people would do if I gave them write access. Within 3-4 days of my server . . . . A week before publishing this paper, I opened an anonymous ftp site on my home machine, expecting a few connections. I also wanted to see what people would do if I gave them write access. Within 3-4 days of my server being up, I got a successful connection from a remote host, which created his own directory named "_kurdt". Later on, I got another connection from a possibly different visitor, who created a different directory name "020612105639p". Checking my ftp logs, I learnt that both processes seem automated: within the same second the user has logged in, created a folder and disconnected from my ftp server. The third scan consisted of testing upload, deletion and ftp/http miss-configuration. These attacks are described in detail on the log files section. The link for this article located at EyeOnSecurity.org is no longer available. . Uncover the story of how a seemingly harmless open FTP server on my personal computer evolved into a hotspot for illicit file transfers and security breaches.. Anonymous FTP, Server Security, Unauthorized Access. . Anthony Pell

Calendar 2 Jul 18, 2003 User Avatar Anthony Pell Network Security
77

OpenBSD 3.0 Active FTP Configuration: Improving Security in Firewalls

With release 3.0 the OpenBSD project replaced Darren Reed's ipf software with the more license friendly pf filtering software. While pf and ipf are very similar in overall design, there are many subtle differences bewteen the two. This paper will focus . . . . With release 3.0 the OpenBSD project replaced Darren Reed's ipf software with the more license friendly pf filtering software. While pf and ipf are very similar in overall design, there are many subtle differences bewteen the two. This paper will focus on one particular difference between the two, how to allow outbound active FTP access from clients protected by an OpenBSD 3.0 firewall. Before we go into detail about how to configure OpenBSD 3.0, let's briefly review how the FTP protocol works (and doesn't work). FTP is a very venerable protocol that was definately not designed with security in mind. While it was being developed, the concept of a firewall didn't even exist. Since then, improvements have been made to the FTP protocol to make it easier to secure. Unfortunately, client software packages (at least on the Windows platform) have been slow to adapt to these changes, forcing firewall administrators to develop some sort of workaround. The link for this article located at Deadly.org is no longer available. . OpenBSD 3.0 brings major improvements in firewall settings for active FTP clients, enhancing security to tackle common vulnerabilities effectively. Active FTP, OpenBSD Firewall, FTP Security, Software Solutions, Network Management. . LinuxSecurity.com Team

Calendar 2 Feb 05, 2002 User Avatar LinuxSecurity.com Team Server Security
67

Secure FTP vs. Standard FTP: Exploring Benefits of SSH Tunneling

This article will point out the differences between standard FTP and secure FTP using some real-world examples. Secure FTP solves the password security and port control problems by allowing the entire connection to take place through a single tunneled SSH connection. . . . . This article will point out the differences between standard FTP and secure FTP using some real-world examples. Secure FTP solves the password security and port control problems by allowing the entire connection to take place through a single tunneled SSH connection. If you're a firewall administrator (and most of us have learned to adopt this title in one form or another), your firewall rules just got easier. Now you can safely block your FTP ports access to the outside world - primarily the FTP default port, 21. The Secure FTP server has to be running OpenSSH, which accepts ssh1 and ssh2, and also needs to be running ftpd, the "normal" FTP daemon (more on this later). The Secure FTP client calls to the Secure FTP server on its SSH port. The server then connects internally to port 21, the FTP port, and tunnels the FTP data back across the SSH port to the client. To ensure the server is totally secure, you need to firewall off port 21 from outside access, only allowing the local host to connect to port 21. This is accomplished by either ipfw (firewalling) or tcpwrappers (under Unix, the hosts.allow file). The link for this article located at 8wire is no longer available. . FTP and SFTP are both file transfer methods, with SFTP providing enhanced security through encryption, ensuring safe data handling and user authentication. Secure FTP, SSH Tunnel, File Transfer Security. . LinuxSecurity.com Team

Calendar 2 Jun 24, 2001 User Avatar LinuxSecurity.com Team Cryptography
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150
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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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