ICMP Security

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This is a draft guide to handling ICMP securely.

Guide Analysis to Handling ICMP protocol

Summary:

This guide is an attempt to help answer common questions related to the handling of ICMP protocol in a secure and effective manner. Comments and feedback is always welcomed. This article is meant to cover the major area in which there may be questions on how to handle ICMP and what specifically should we allow in each particular condition which will also allow for ...

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Layer 2 Tracing for (6500, 7609, 4500) Cisco Switches

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In a 6509, 7609 or any Chassis based Cisco switch, to determine where the switch forwards a Source and Destination pair to an actual port in a Port-channel/Etherchannel do the following commands:

Note: Doesn’t apply to Nexus switches.

First enter console for switch:

port-channel hash
Switch# remote login switch
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Great SMTP DNS and Troubleshooting tool

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mxtoolbox

Go to http://www.mxtoolbox.com

This test will list MX records for a domain in priority order. The MX lookup is done directly against the domain’s authoritative name server, so changes to MX Records should show up instantly. You can click Diagnostics , which will connect to the mail server, verify reverse DNS records, perform a simple Open Relay check and measure response time performance. You may also check each MX record (IP ...

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MPLS L3 VPN White Paper

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Enterprise Network Design White Paper
For Metropolitan and Campus Networks –
MPLS L3VPNs 
Robert Shields
Sr. Network Engineer, CCIE # 12096 
January 2012 
Enterprise Network Challenges of Today and Beyond 
Enterprise network and security managers continue to see their responsibilities increase within their respective IT organizations as applications and services continue to migrate to IP as a fundamental means of communication. These applications and services include telephony, video, wireless and mobility clients, storage area networks, etc., ...

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Cisco XR IOS Code Upgrade

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Summary of XR IOS Code Upgrade:

1.Download the correct image tarball from cisco.com. The image cannot be used as-is. The CCO image tarball for Release 4.3.4 (Cisco recommended) must be downloaded first and only relevant Packages Installation Emvelope (PIEs) or Software Maintenance Upgrade (SMUs) must be taken for use on the router.

2. Before upgrading to the new code, all the mandatory SMUs required to be active in the current release must be installed. For example we are upgrading from code 4.2.3 to 4.3.4 and ...

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Windows Media conversion to stream live to USTREAM

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Our Client owns old Vbrick Encoders that can only encode Windows Media video format. This is a big problem if the video stream is being offered for Public viewing to support a wide variety of devices (Tablets, IPADs, IPhones, Android devices, Macs, PCs, etc.). To avoid purchasing at least two new $10k H.264 encoders and the need to build a new media server, we are going to use 3 types of software running from a PC or laptop. Make sure ...

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How to encode video and screencasts optimally for the web using Handbrake

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What format should you use when you make video for the web? MP4

It is important to optimize your video for web use especially for our internal use using ACTube. Non-optimized video formats and settings can cause video pauses and stuttering.

Notice that when you upload a video to YouTube or Vimeo, they transcode and prepare the video in some way that it is web optimized. There are some very good reasons for self-hosting our videos.  One reason is security ...

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INC 5000 list of fast growing Companies

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Ashburn Consulting has made the Inc. 5000 list of the fast growing companies in the nation!  This is a tremendous accomplishment and I couldn’t be any more proud of each and every one of you that has made this a reality!  We thank all of our dedicated and talented employees for their commitment to excellence to make AC what it has become today!   Grateful, Jim Burris

http://www.inc.com/profile/ashburn-consulting

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