OK – the last couple of entries got into some heavy lifting and some real learning on your part. Learning about what software needs to run, what services are running, updating them to keep current on security patches. We even talked about securing services listening for outside connections and limiting them to what is absolutely necessary. Now we’ll take a deep breath and get into another area… Wireless network security.
Category: Networking
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Network Security guide for the home or small business network – Part 6 – Secure your services
This one is going to be tougher. Of what we’ve looked at so far this will probably take more work and learning than any of the others. The good news is, depending on your situation you may need to do less here. IF you have decided that your pc (or network) has ports open to the outside world, so that incoming connections can be listened for. You NEED to do this. For every service that is accessible from the outside world…
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Network Security guide for the home or small business network – Part 5 – Update your software
Okay – so after the last article you’ve inventoried what software you use on a PC and you know what services (server’s) the pc runs that you’ve told it to. You even know what passes as “normal” startup programs. Now it’s time to put that to use. It’s time to keep up with updates for the operating system, any of the programs you use form time to time, and any programs that listen as a service (actively listen for incoming network connections.)
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Google Talk notes
Since Google Talk is based on the Jabber protocol (XMPP) it’s been compatible with any jabber client for instant messaging. That was a well and good move. Very welcoming to see a big name use an open protocol that can be implemented by anyone. There were some concerns though that the voice talk features were only supported in the Google Talk client and so, no one else would be able to get in on the voice features.
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Bittorrent is amazing
As I type this, I’m downloading a compressed hard drive image from the freeoszoo download page. The download size is about 1.2GB and it’s been BLAZING fast. (286KBps is the top I’ve seen) it’s been going – maybe 20-30 minutes and is 70% through…
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Network Security guide for the home or small business network – Part 4 – Know your software
Ok, so you’ve got a hardware firewall and you’ve got antivirus. You’re safe right? Well, not entirely. I’ve mentioned the flaws of antivirus. It’s always a step behind. A firewall doesn’t protect against unknown viruses, so what else is there to do? I’m going to tackle this in two steps. The first is to know what software is running on your system. Isn’t there a lot of that? How can I keep up?
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Network Security guide for the home or small business network – Part 3 – Antivirus
Ok, the first two entries thus far, hardware firewalls and software firewalls have been fairly operating system independant. A hardware firewall is best, but if that’s not possible a software firewall will do until you get a hardware firewall setup. This next item is (currently) a must have for Windows users. However, Mac and Linux users may see the day soon when it is an essential part of security for those systems as well. These days I am stunned to see PC’s that don’t have an antivirus program installed.
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Network Security guide for the home or small business network – Part 2 – A Software Firewall
Do I really need a hardware firewall? I’m running XP Service Pack 2 with the built in firewall? (or norton, or zonealarm?) Well, personal firewalls (the name that software firewalls go by) are good for a great many things that hardware firewalls AREN’T. They do have their limitations though and I’ll try to cover those in this post. Of course, a software firewall is running on the pc that you use to connect to the internet and one of the functions it serves is to “close the doors and windows” or those open ports that a computer can listen for connections on.
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Tools of the trade…. USB network adapter
For a long time I really disliked seeing USB network adapters. The main reason is the performance. USB 1 can only do ~ 12Mbps which compared to a 10/100 ethernet controller “significantly limits your ability to do more than 10…” Even USB 2 supports 480 Mbps which should give you the ability to get full throughput of up to 200mbps with full duplexing. However, I still cringed at USB network adapters….
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Network Security guide for the home or small business network – Part 1 – A Hardware firewall
Computers can communicate over networks. (Surprise!) That’s how you’re reading this post. The machine that this site is hosted on is listening for requests for connection. When it receives a request it answers back with a web page. In fact, computers can listen for a great many different kinds of connection at the same time. In networking we talk about a computer listening on a given “port”. The web server for this site (and most web sites) listens on what’s called port 80. There are 65535 possible network ports that a computer can listen for incoming connections on.