Service overview and network port requirements for Windows March 28, 2018, 2:08 p.m.

A roadmap of ports and protocols and services that are required by Microsoft client and server operating systems, server-based applications and their subcomponents to function in a segmented network.

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Intercepting iOS Network Traffic Aug. 25, 2017, 4:20 p.m.

To sniff an application’s network traffic, we’re going to use mitmproxy. It’s a powerful man-in-the-middle proxy that allows you to intercept, modify, replay, and save HTTP/S traffic.

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Packet loss with OS X Mavericks Feb. 20, 2014, 8:54 a.m.

Mac OS X machines may drop their network connection every half a minute or so due to a new security feature introduced in Mavericks - ARP Cache Validation, with a force disconnect for every mismatch - this supposedly stops ARP Spoofing attacks on LANs.

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GNS3: Graphical Network Simulator March 26, 2013, 1:33 p.m.

GNS3 is a graphical network simulator that allows simulation of complex networks. GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to study for certifications such as Cisco CCNA, CCNP, CCIP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE.

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Intermapper Sept. 22, 2011, 7:36 p.m.

Network Monitoring Software, Network Monitoring Tools

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Guide to Ethernet Wiring Aug. 8, 2011, 11:57 a.m.

The Compass DeRose Guide to Ethernet computer network wiring

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Automount Samba Shares in Snow Leopard Feb. 9, 2010, 10:50 a.m.

A way of mounting Samba shares in Snow Leopard that does not depend on the login process. This method auto-mounts a share when it is accessed.

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SecurityTube Jan. 2, 2010, 7:20 p.m.

Computer security videos, including videos of defcon talks.

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How to change sshd port on Mac OSX Dec. 14, 2009, 7:23 p.m.

SSH on 10.5 and up is launched by launchd, and reads its port from /etc/services. To change the port, edit /System/Library/LaunchDaemons/ssh.plist and hard code the new port number in place of the service name.

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What's My DNS? Dec. 5, 2009, 6:11 p.m.

Global DNS Propagation Checker. Check DNS responses from servers around the world.

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Explanation of Leopard NetBIOS July 24, 2009, 11:10 a.m.

Excellent guide to troubleshooting windows file and printer sharing in Leopard.

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MxToolbox May 22, 2009, 10:23 a.m.

Email server test utility.

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Gibson Research Corporation May 3, 2009, 12:50 a.m.

Port scanner, password generators and other handy tools.

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OpenVPN Sept. 25, 2008, 5:44 p.m.

Open source VPN software.

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Traffic Shaping in Mac OS X July 3, 2008, 2:15 p.m.

Network traffic shaping in Mac OS X using ipfw.

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