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Using a SIM Card for a Data Connection

Posted on 2010-08-17
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Hello,

I have been having a problem with getting a computer to connect to the Internet using a SIm card in a Toshiba Tecra A11 via VPN. When the laptop connects to the Internet I can dial into my VPN succesfully but once it is connected it is not being seen from our network. When Using a Data Card (via USB) on the same network it connects succesfully and when dailing into the VPN it connects and is visible from our network. Both cards use the same DNS servers etc when initially connected.

Any Suggestions would be greatly appreciated.
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Question by:cplit
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Expert Comment

by:John Hurst
ID: 33460298
Presumably the software for the internal card is different than the software in the USB card. Do I have that correct?
That is more likely the problem than the SIM card itself. Cellular networks present a double NAT type of connection which are troublesome to most VPN applications. Different cellular cards/software present themselves differently to VPN applications.

I don't know if you can do anything. I wound up changing VPN applications to get around these problems.
... Thinkpads_User
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Author Comment

by:cplit
ID: 33480896
Yes that is correct, I use a different software for the Data Card and the Internal SIM. The Software I use for the Internal SIM is the Toshiba Wireless Software. I imagine it would be quite difficult to find software that is not vendor specific for the internal SIM. Which VPN client did you end up using in order to get a connection?
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John Hurst earned 750 total points
ID: 33480925
The strongest VPN client I have ever used is NCP Secure Entry (www.ncp-e.com) . It works through just about anything (including my own data card). Even Juniper Netscreen (which OEM'd from SafeNet for years) has now switched to NCP Secure Entry.  They do have a full function trial, so if you try and it still does not work, you have not lost anything. ... Thinkpads_User
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Author Comment

by:cplit
ID: 33697402
We will give NCP a crack and see how we go. Thanks for all your help :)
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Author Closing Comment

by:cplit
ID: 33697410
Will post an update wheter or not was succesful but will not able to test for some time as the laptop is out of our reach
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Expert Comment

by:John Hurst
ID: 33697424
Thank you for the points, and good luck going forward. .... Thinkapds_User
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