Monday
Mar282011

How to make sure your Internet will not go down

For those of you that have the Astaro Security Gateway (ASG), below is a vide procedure on how to setup 2 ASGs so that in case one fails the other takes over (Master/Slave or Hot-Standby).

 

 

 

Wednesday
Mar232011

Share large files with Dropbox

Have you ever wanted to share a large file with a friend or co-worker? If the file is smaller than 25Mb you can use your email program but what about a larger file say 50Mb or 100Mb?

There are several services in the market but one that is affordable (the basic 2Gb account is free) is simple to use and has security (encryption) built it is Dropbox.

We started using Dropbox about 2 year ago and keep finding more uses for it. There is an iPhone client that allows you save you data on the cloud and have it available when you get to your desk (we use this for our iPhone Camera Roll photos with an application called CameraSync, look for it on the App Store). Our friend accountants use it for receiving the customer's tax files and once you upload it all your files are synched automatically, between any other computer that you decide to use Dropbox.

 

Friday
Mar182011

AT&T DSL customers beware, your data will be capped by month's end.

AT&T (Bellsouth) customer will receive a notice soon that their Internet access will be capped to 150Gb per month while U-Verse will be 250Gb per month. All this will take place starting on May 2, 2011.

Overage charges will only be imposed on customers “who consistently exceed the new caps,” according to Broadband Reports.

If a user exceeds the cap three times, they will be charged $10 for every additional 50GB over the limit. The worst part is that this 3 strikes is through the life of the contract not each month. This means that once you exceed your limit 3 times you will be charged every time you exceed.

According to AT&T customers will be alerted of their usage amounts — similar to mobile data plans — so exceeding the limit shouldn’t come as a surprise. AT&T says it will “proactively notify customers when they exceed 65%, 90% and 100% of the monthly usage allowance.”

If you use any of the streaming services like Netflix or Hulu, broadband usage caps like these could raise interesting questions for consumers.

Are you an AT&T DSL or U-Verse customer? What do you think of the new terms?

Tuesday
Mar082011

How to Renew your Exchange 2007 SSL Certificate

The Exchange 2007 Server comes with a self signed SSL certificate that expires one year after it is installed. The process below shows you how to renew that self signed certificate.

You will see the following events in your Event Viewer.

Event Type: Warning
Event Source: MSExchangeTransport
Event Category: TransportService
Event ID: 12018
Date: 13/04/2008
Time: 09:01:00
User: N/A
Computer: EXSERVER
Description:
The STARTTLS certificate will expire soon: subject: exserver.domain.local, hours remaining: 157700393E5D76615E855A773CFA08AB5842DFB0. Run the New-ExchangeCertificate cmdlet to create a new certificate.

Event Type: Warning
Event Source: MSExchangeTransport
Event Category: TransportService
Event ID: 12017
Date: 13/04/2008
Time: 09:01:00
User: N/A
Computer: EXSERVER
Description:
An internal transport certificate will expire soon. Thumbprint:157700393E5D76615E855A773CFA08AB5842DFB0, hours remaining: 295

These events inform you that you have an expiring transport certificate.

 

Creating a New Certificate

Before you create the new certificate it is a good idea to find out about the existing certificate by running the following command on an Exchange Powershell prompt:

Get-ExchangeCertificate | List

To create a new certificate type the following command:

New-ExchangeCertificate

You will get a warning that you are about to overwrite the SMTP certificate, say "Y" for yes.

At this point it may seem that the process is complete but running a Get-ExchangeCertificate command again displays both the old and the new certificate and the IIS Service is still using the old certificate.

We need to move the IIS service using Enable-ExchangeCertificate. To do this we need the thumbnail value of the newly created certificate. In our example this would be the command:


Enable-ExchangeCertificate -Thumbprint F7A8F1B443A0E7266C72CDE0603302C07B856076 -Service IIS

With the new certificate in place we may now remove the old certificate using Remove-ExchangeCertificate with the thumbprint value of the old certificate:

Remove-ExchangeCertificate -Thumbprint 157700393E5D76615E855A773CFA08AB5842DFB0

 

 

 

 

Thursday
Mar032011

How to protect your Android phone from Malware

The Android OS is a one of the 2 most popular phone OS on the market today. Unfortunately one of the disadvantages of having an open OS (unlike Apple's iOS) is that the Android Market place has more lax requirements and as such there have been incidents in which apps have been approved later to find that they contain malware code that steals your information.

One of the ways to find out if a developer is up to no good is by looking at their other applications. This will give you an idea of what this developer is really trying to accomplish. Many nefarious developers create "clone" apps and entice you to download for free.

One application that can help is Lookout. This app has an updated database of the applications to avoid with their exploit code.

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