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PIX 506 or 515?

Posted on 2001-08-16
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Last Modified: 2010-04-11
Hi all,

In our small office, about 20 users, some users are mobile users and they connect to our network using 56k modem through MS VPN. At the moment we only have MS proxy server for security and we know it is not enough, so we decide to have a PIX. But, I am not sure whether I should get 506 or 515. After studying some information on net, I know that 506 can not upgrade and 515 is more flexible for future upgrade. Let say, if our company will not have more than 20 people for the next 2 year. Can 506 do the job? VPN is also a issue, should I use Cisco VPN or stick to MS VPN? PPTP or L2TP? DES or 3DES? I know it is better to use Cisco VPN for security but my other concern is the speed because some mobile user use 56k modem. Any input will be appreciated.

Thanks,
Kwank
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Question by:kwank
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Expert Comment

by:lrmoore
ID: 6395295
My vote goes to the 515R (Restricted user license vs unrestricted - big differnce in price, and you can upgrade later if you have more than 100 users).
The 515 supports IPSEC VPN's to Cisco IPSEC client at up to 168-bit 3DES encryption. The 506 is restricted to 4 simultaneous users. The 506 is really designed for SOHO 2-4 user environments.
In sum:
PIX 515R
Cisco IPSEC Client (zero cost) using 3DES encryption

Do the users dial directly into a modem bank at your location? If so, regardless of 56k modems or not, you will only see 33.6 or 36k tops because both ends are analog.
Option: Get a direct Internet connection (frac T-1 or something), and set your users up with dial-up Internet accounts (AOL, AT&T Worldnet, UUDIAL, etc). User dials into the ISP (connects at 43-53K at digital modem bank), and then opens the IPSEC connection to your firewall. Now you don't have to maintain the modem bank and your PPTP server can be used elsewhere.
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by:kwank
ID: 6395365
Irmoore,

Thanks for your input.
Sorry, I did not make it clear on my quesiotn. Our server do have a lease line directly connect to the internet and moblie users do use the method that you mention to connect to our server. What is the speed like if we have Cisco IPSEC Client using 3DES encryption compare to MS VPN Client? Is it acceptable for 56k modem?  

Thanks,
Kwank
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by:lrmoore
ID: 6395515
I think the speed is better with Cisco IPSEC than with Microsoft PPTP, but over 56k you really can't tell the difference.
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Expert Comment

by:lrmoore
ID: 6396748
I think the speed is better with Cisco IPSEC than with Microsoft PPTP, but over 56k you really can't tell the difference.
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Author Comment

by:kwank
ID: 6400838
Irmoore,

Last question, how do I make the PIX 515R and Cisco IPSEC client to work with the NT4 server which is also a PPTP and proxy server?

Thanks,
Kwank
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Accepted Solution

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lrmoore earned 200 total points
ID: 6400876
There are many ways to do it..
Any more specific than this, I think you should open a new question..

use your PIX in place of the PPTP server
With IPSEC client
http://www.cisco.com/warp/customer/110/pix3000.html
With MS VPN Client
http://www.cisco.com/warp/customer/110/pptppix.html

PPTP Behind the firewall
http://www.microsoft.com/technet/treeview/default.asp?url=/TechNet/columns/tips/15tipsfo.asp
(See Using Firewall Ports)
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