background preloader


Facebook Twitter

Working with Open Shortest Path First (OSPF) Routing Protocol. Because Open Shortest Path First (OSPF) is an open standard protocol, many people have contributed to its design and thousands upon thousands of people have reviewed it.

Working with Open Shortest Path First (OSPF) Routing Protocol

In this section,some functional components of this interior gateway protocol (IGP) and its use in your networks will be highlighted. Because every IGP behaves slightly differently from other IGPs, you should be familiar with a few OSPF terms that are used with the protocol before jumping into the configuration commands. This section attempts to clarify the major terms and concepts you should be familiar with. OSPF as a link-state protocol In link-state protocols, the link part of the protocol is the interface on the router, while the state is how it relates to its neighbors, which would include its address and network information. Each router that has been configured for an OSPF area sends out a Link State Advertisement (LSA) at regular intervals. OSPF packet types Knowing areas and Autonomous Systems The Hello packet. Five free network analyzers worth any IT admin's time. If you work on a network, you then know the value of information.

Five free network analyzers worth any IT admin's time

Solid information leads to a strong and worry-free network (or at least as worry-free as you can manage). In order to gather that information, you need the right tools. The tools I speak of are network analyzers. Once you start looking, you can find analyzers of every shape, size, and price. But for most network admins, the free tools do a solid-enough job to get you the information you need. But which of these tools are the best? This blog post is also available as a TechRepublic Photo Gallery. Five Apps 1. Network Theory. SECURITY. Wifi. How to Use Microsoft NPS for Wireless Authentication with a Ruckus ZoneDirector. I’ve already discussed using a FreeRADIUS server for wireless authentication, so now I’m going to address using Microsoft NPS, Microsoft’s implementation of RADIUS.

How to Use Microsoft NPS for Wireless Authentication with a Ruckus ZoneDirector

The main reason to do this would be Active Directory integration, but other organizations may have other reasons. NPS is bundled with all versions of Windows Server starting with Server 2008. Prior to 2008, Windows Server used IAS, which may or may not conform to these directions. The compony I work for sells IT support for commercial customers in addition to the Internet services we sell. One of our customers wanted wireless services for its branch offices with three distinct requirements: Corporate-owned laptops should be able to access corporate dataEmployees should be able to connect their own devices to the Internet, but not to access corporate dataGuests should be able to connect to the Internet, but with limited speeds, limited available ports, and must be forced to agree to an acceptable use policy That’s it.

TLS & SSL Tunneling/VPN. VPN (Virtual Private Network) MPLS VPN. VPN VLAN Tunnels etc. Arris password of the day generator. Do you need an Arris modem password?

Arris password of the day generator

Are you stuck with your Arris modem, in a message that says “in order to access advanced features you must enter the password of the day”? Well then, you came to the right place! Donations Was this useful to you? Please consider donating some Bitcoins or Litecoins. Donate Description This is a an Arris password of the day generator for various Arris cable modems. I created this because a cable modem died on me and my ISP, Cabovisão (if you’re in Portugal, I highly recommend them), brought me a new one: an Arris TM602A. As usual when I receive a new technological gadget, I had to explore it. A bit of googling provided the answers I needed: a couple of pages with a list of passwords of the day (this device has a different password every day) and a page with a password generator for the TM501A model but seems to work fine for the TM602A. So I brought the matter into my own hands and I wrote my own arris password of the day generator.

ARRIS Cable Modem has a Backdoor in the Backdoor. A couple of months ago, some friends invited me to give a talk at NullByte Security Conference.

ARRIS Cable Modem has a Backdoor in the Backdoor

I started to study about some embedded device junk hacking hot topics and decided to talk about cable modem security. Braden Thomas keynoted at Infiltrate 2015 discussing about Practical Attacks on DOCSIS so, yeah, cable modem hacking is still mainstream. On November 21st I'll be at Salvador speaking on "Hacking cable modems: The Later Years". It's not a talk about theft of service and getting free Internet access. I'll focus on the security of the cable modems, the technology used to manage them, how the data is protected and how the ISPs upgrade the firmwares.

Securing cable modems is more difficult than other embedded devices because, on most cases, you can’t choose your own device/firmware and software updates are almost entirely controlled by your ISP. ARRIS Backdoors The following files load the backdoor library on ARRIS TG862A Firmware TS0705125D_031115_MODEL_862_GW (released on 2015): -

Open Networking Network. Windows Network Administration. Network Security – Next Generation Firewalls by Palo Alto Networks.