network — Bookmarks@MarkupDancing

OpenFlow - Enabling Innovation in Your Network

saved on 2012-03-05 10:00:43

tagged with network

OpenFlow capable firmware for HP switches is now available without requiring special license. It can be downloaded by customers/partners from HP’s website.Current version is K.15.05.5001for OpenFlow researchers only as Early Availability and here is how I downloaded it: Go to http://www.hp.com/networking/support You will be required to sign-in to download the firmware. If you have your account, go to the next step. Otherwise, create it now and come back. To crate your account, place the mouse pointer over the “Sign-in” link on top right corner. Another menu pops up and click “Create new account” and follow the instruction. In Auto Search text-box, type the part of the product name e.g., 5400 or 6600 Select appropriate product check the check box Click “Display Selected” button Click “software downloads” link a bit hard to find.. look for light-blue link on the right side Find the proper firmware and click the link shown as “>>”. As of the timing of this blog post, “K.15.05.5001 for OpenFlow researchers only” in Early Availability is the one. You’re required to sign-in. Click “Sign-in with HP Passport” button. Sign-in Finally. Click “Download” button Read the SUPPORT CAUTION first.

「ルータとL3スイッチの違い」を正しく説明できますか？［第1回］|ネットワーク機器|トピックス|Computerworld

saved on 2011-11-10 19:24:57

tagged with network • security

知人のA氏がこんなことを言っていた。「もうルータは古いよ。レイヤー3（L3）スイッチに置き換えるべきだね」と。その理由を尋ねると、「ルータはソフトウェア処理だから遅いんだ。だけど、L3スイッチはハードウェア処理だから速いのさ」と答えた。A氏曰く、すべてのルータをL3スイッチに置き換えるべきだそうだ。本連載では、ルータとL3スイッチのほんとうの違いとその役割分担について解説する。

pypcap - simplified object-oriented Python extension module for libpcap - Google Project Hosting

saved on 2011-09-01 11:10:53

tagged with network • security

simplified object-oriented Python extension module for libpcap - the current tcpdump.org version, the legacy version shipping with some of the BSD operating systems, and the WinPcap port for Windows.

Penetration Testing with dsniff

saved on 2011-04-27 18:39:38

tagged with network • security

The ability to access the raw packets on a network interface (known as network sniffing), has long been an important tool for system and network administrators. For debugging purposes it is often helpful to look at the network traffic down to the wire level to see exactly what is being transmitted. Dsniff, as the name implies, is a network sniffer - but designed for testing of a different sort. Written by hacker Dug Song, dsniff is a package of utilities that includes code to parse many different application protocols and extract interesting information, such as usernames and passwords, web pages being visited, contents of email, and more. Additionally, it can be used to defeat the normal behaviour of switched networks and cause network traffic from other hosts on the same network segment to be visible, not just traffic involving the host dsniff is running on. These capabilities alone are enough to attract interest, but in its latest version (2.3 as of this writing, released late December 2000), it includes new programs to launch man-in-the-middle attacks on the SSH and HTTPS protocols, which would allow viewing of the traffic unencrypted, and even the possibility of taking over interactive SSH sessions. These new abilities have caused some uproar in the security community, however this document is not an ethical or technical debate; I only hope to show dsniff in action to help people understand its capabilities and therefore be better able to see weaknesses in their own network.

The Looming Cable Monopoly | Yale Law and Policy Review

saved on 2011-01-05 14:09:30

tagged with Internet • monopoly • network

One effective label that has often been used during the first two years of the Obama administration is the “looming spectrum crisis.” FCC Chairman Genachowski said in October 2009: “I believe that that the biggest threat to the future of mobile in America is the looming spectrum crisis.”[23] As the crisis loomed, the administration—worried about the lack of spectrum allocated for high-speed Internet access—declared it would re-allocate 500 MHz of spectrum.[24] There is a hunt on for spectrum: Every closet in every agency is being searched. Looming. Crisis. It may be time for yet another label to enter the lists: “the looming cable monopoly.” It is gaining strength, and it is not terribly interested in the future of the Internet. This is the central crisis of our communications era.