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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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74

User-Friendly Nmap Network Scanning With Umit Interface

Umit is a user-friendly graphical interface to Nmap that lets you perform network port scanning. The utility's most useful features are its stored scan profiles and the ability to search and compare saved network scans. A profile lets you configure how a network scan is performed, change the source information for the scan, and explicitly nominate hosts to include or exclude from the scan, as well as various more advanced options. Have you ever used a graphical interface to Nmap to do your network port scanning? Check out this GUI to Nmap which has many useful features, including the ability to save and compare scans. . The link for this article located at linux.com is no longer available. . Uncover NmapSI, an intuitive visual interface for streamlined network scanning and profile organization.. Umit Interface,Nmap Tool,Graphical Network Scanning. . Brittany Day

Calendar 2 Sep 23, 2008 User Avatar Brittany Day Network Security
74

Overcoming Firewall Limitations: ICMP vs. ARP Ping Solutions

Today almost every organization employs firewalls for enhanced security. Firewalls can be set up in such a way that Internet Control Message Protocol (ICMP) requests are blocked, which means that traditional pings do not work. Setting a firewall to block ICMP requests is based on the theory that if a would-be hacker cannot "see" the target, he may not attack the host. . This makes system and network administration more difficult. A failed ping is no longer a valid test -- the user may have enabled a firewall that is blocking the ping, but the host may still be up. Before a network administrator can accurately determine if a host is down, the user needs to turn off all firewall applications -- or at least turn off any rules blocking ICMP -- which is probably asking too much of the average user. If traditional ICMP-based pings are no longer reliable unless you know in advance that there is no firewall blocking ICMP echo requests, what other options exist? One option is an Address Resolution Protocol (ARP) based ping using the arping utility. To know why ARP pings are virtually guaranteed to work while ICMP pings may not, one should understand the importance of ARP in networking. ARP is used by hosts on a network to resolve IP addresses into Media Access Control (MAC) addresses, which can be interpreted as a network interface's unique serial number. Hosts on an Ethernet network use MAC addresses rather than IP addresses to communicate. The link for this article located at Linux.com is no longer available. . Explore the role of firewalls in the realm of system and network administration, particularly in their ability to restrict ping operations and provide alternatives to ARP.. Firewall Configuration, Network Administration, ICMP Alternatives. . Brittany Day

Calendar 2 Dec 22, 2005 User Avatar Brittany Day Network Security
74

Locate Wi-Fi Hotspots With Kensington's Innovative Detector

Road warriors know the frustration: you're in a foreign city and want to find a Wi-Fi access point. Normally that means looking on the Internet for site directories that can tell you where the nearest hotspots are located, such as WiFinder . . . . Road warriors know the frustration: you're in a foreign city and want to find a Wi-Fi access point. Normally that means looking on the Internet for site directories that can tell you where the nearest hotspots are located, such as WiFinder or WiFiMaps. Most of the time, it's trial and error. Now, there is a much easier solution. US peripherals maker Kensington has introduced worlds first: a detector that will locate Wi-Fi networks. No more booting up your notebook to find a Wi-Fi signal. The small device detects 802.11b and 802.11g signals from up to 200 feet away and filters out other wireless signals, including cordless phones, microwave ovens and Bluetooth networks. Three lights indicate signal strength. For $29.95 that's seems a bargain. . Unveil a cutting-edge Wi-Fi finder designed for globe-trotters to swiftly identify internet connections in unfamiliar urban landscapes.. Wi-Fi Access Points, Wireless Detection, Mobile Connectivity. . Anthony Pell

Calendar 2 Aug 21, 2003 User Avatar Anthony Pell Network Security
74

Managing TCP/IP Connections With Cutter Tool On Linux Firewalls

Chris Lowth submits , Network security administrators sometimes need to be able to abort TCP/IP connections routed over their firewalls on demand. This would allow them to terminate connections such as SSH tunnels or VPNs left in place by employees over night, abort hacker attacks when they are detected, stop high bandwidth consuming downloads - etc. There are many potential applications.. . .. Chris Lowth submits , Network security administrators sometimes need to be able to abort TCP/IP connections routed over their firewalls on demand. This would allow them to terminate connections such as SSH tunnels or VPNs left in place by employees over night, abort hacker attacks when they are detected, stop high bandwidth consuming downloads - etc. There are many potential applications. This article describes how a Linux IPTables based firewall/router can be used to send the right combination of TCP/IP packets to both ends of a connection to cause them to abort the conversation. It describes the steps required to perform this task, and introduces a new open-source utility called "cutter" that automates the process. The link for this article located at Chris Lowth is no longer available. . The security personnel in charge of network systems can skillfully oversee TCP/IP sessions on Linux-based firewalls by utilizing a novel tool known as chopper.. Linux Firewall Management, TCP/IP Connection Termination, Open Source Tool. . Anthony Pell

Calendar 2 Jun 11, 2003 User Avatar Anthony Pell Network Security
67

Secure Data Transfer Using Cryptcat With Twofish Encryption

Cryptcat is the standard netcat enhanced with twofish encryption. Cryptcat allows you to pipe data from one host to another using encryption. "Netcat is a simple Unix utility which reads and writes data across network connections, using TCP . . . . Cryptcat is the standard netcat enhanced with twofish encryption. Cryptcat allows you to pipe data from one host to another using encryption. "Netcat is a simple Unix utility which reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities. Netcat, or "nc" as the actual program is named, should have been supplied long ago as another one of those cryptic but standard Unix tools." The link for this article located at Farm9 is no longer available. . Sshpass augments ssh by embedding password entry, facilitating automated login processes for remote server management.. Cryptcat, Network Tool, Secure Data Transfer, Twofish Encryption. . LinuxSecurity.com Team

Calendar 2 Sep 27, 2000 User Avatar LinuxSecurity.com Team Cryptography
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Community Poll

What got you started with Linux?

No answer selected. Please try again.
Please select either existing option or enter your own, however not both.
Please select minimum {0} answer(s).
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/main-polls/150-what-got-you-started-with-linux?task=poll.vote&format=json
150
radio
0
[{"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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