Yeo Networks

Anonymous’ Blog

Ken Yeo — Wed, 15 Jun 2011 23:59:12 +0000

Anonymous’ Blog
http://anonops.blogspot.com/

Ping your site from 50 nodes around the world

Ken Yeo — Tue, 01 Mar 2011 20:15:10 +0000

Watchmouse runs a free service call Just Ping. It allows you to run ICMP echos to an IP address of your choice from 50 nodes around the world. It is quick and easy way to test basic connectivity to any IP note on the Internet.

The tool also supports IPv6, although the number of test nodes drops from 50 to 17 if you want to test IPv6 address.

IPv6 Website Directory

Ken Yeo — Thu, 17 Feb 2011 20:54:16 +0000

The most complete IPv6 websites directory: http://six y.ch/

IPv6 ULA Address Generator

Ken Yeo — Wed, 16 Feb 2011 22:16:26 +0000

If you are thinking about using IPv6 ULA, here two sites that can generate random ULA Prefix for you.

1) SimpleDNS
2) SixXS

Configuring ACS 5.x with ACE

Ken Yeo — Thu, 10 Feb 2011 20:15:15 +0000

Cisco ACE requires special configuration on Cisco ACS to allow network admin to get into the ACS’s global configuration mode. In my previous post, I shows you how to do it in ACS 4.x. Here is the equivalent setting in ACS 5.x

NIST SP 800-125 Guide to Security for Full Virtualization Technologies

Ken Yeo — Tue, 08 Feb 2011 14:22:48 +0000

NIST has released SP 800-125 – The Guide to Security for Full Visualization Technologies. It is a 35 page long document. The document focuses on virtualized servers and desktop. While there is nothing we do not know already, this publication is a good summary for the current servers virtualization technologies, deployments and security recommendations.

Conficker Working Group

Ken Yeo — Fri, 28 Jan 2011 18:19:04 +0000

Conficker Working Group is the security working group that consists of security minded enterprises and organizations. It is formed to combat the conflicker worm. I noticed that all of the organization are US based, except for a few like NIC Chile and Kaspersky. This working group is a great example of how organizations can get together to combat the bad guys. I hope see more involvement from the rest of the world in similar future working groups.

ASA Pre-8.3 to 8.3 NAT config examples

Ken Yeo — Tue, 25 Jan 2011 20:41:14 +0000

Cisco ASA 8.3 introduces the most drastic change on NAT configuration syntax for ASA. The following page is very helpful to understand the new syntax.

ASA Pre-8.3 to 8.3 NAT configuration examples – Cisco Support Community

Virtual I/O switch

Ken Yeo — Thu, 20 Jan 2011 21:43:41 +0000

xsigo is a company that s makes Virtual I/O switch. They call it I/O Director. Kind of like what Cisco is doing with FCoE, xsigo solution allows servers to use Fiber Channel and Ethernet on the same cable. You have two kind of cables to choose, 1Gbps/10Gbps Ethernet or InfiniBand. You will need to install xsigo drivers on your OS to enable these virtual I/O. xsigo solution creates a huge competition for Cisco’s UCS solution, and Cisco is watching them.

GNS3 – Graphical Network Simulator

Ken Yeo — Fri, 14 Jan 2011 22:29:45 +0000

GNS3 is an incredible easy to install network simulator. It uses Dynimips, Dynagen and Qemu to emulate network devices. You can run Cisco IOS, Cisco ASA, Cisco IPS, Juniper Junos and other network devices using GNS3. It is a great learning, development, testing tools for network engineers. GNS3 runs on Windows, MAC OSX and Linux.