RE: GRE Tunnels without IPSEC risks.

["David Gillett" <gillettdavid () fhda edu>]

   The link between the Aruba controller and the VPN server should probably
be within the head-office datacenter, so if people are sniffing that, you
have much bigger problems.  The link between the VPN client end and the AP
should also be short and of limited access, but that data is also wirelessly
sniffable off the AP.  So if you care, you implement WPA/WPA2 on your
wireless -- and if I understand correctly, on Aruba that encryption goes all
the way back to the controller.

  If you implement WPA/WPA2, you don't need IPSEC.  If you believe you need
IPSEC, you really need WPA/WPA2.

David Gillett

-----Original Message-----
From: Maps1 [mailto:maps1 () btinternet com]
Sent: Tuesday, July 12, 2011 11:21
To: Mike Hale
Cc: security-basics () securityfocus com
Subject: Re: GRE Tunnels without IPSEC risks.

Thanks, All.

These are Aruba APs and controllers.

Just so I'm clear - This is a VPN connecting the remote office to the main
office, so I'm assuming it would still be encrypted inside this over the
Internet? But then the GRE encapsulation would offer no additional
protection so the traffic would be accessible to anyone who can sniff either
side of the VPN (i.e. on the inside at either office) ?

Does that sounds right, or is it worse than this?

Thanks again!

--- On Tue, 12/7/11, Mike Hale <eyeronic.design () gmail com> wrote:

> From: Mike Hale <eyeronic.design () gmail com>
> Subject: Re: GRE Tunnels without IPSEC risks.
> To: maps1 () btinternet com
> Cc: security-basics () securityfocus com
> Date: Tuesday, 12 July, 2011, 17:51
> GRE, by itself, doesn't encrypt
> anything.  It *encapsulates* the
> payload, but doesn't encrypt it.
>
> If you want to make sure the data is encrypted, you'll need to run
> IPSec on that tunnel.
>
> On Tue, Jul 12, 2011 at 2:10 AM, Maps1 <maps1 () btinternet com>
> wrote:
> > Hi List,
> >
> > Our network guys have been implementing wireless
> access points in a remote office, which will then use a GRE VPN link
> back to our main office to connect to the wireless controller.
> > In other remote offices where we have full WAN links
> back to the main office, we have configured the APs to use IPSEC
> tunnels for this communication. Unfortunately, these don't seem to
> work through the VPN GRE tunnels used in the smaller offices.
> > Please could someone help me to understand the risks
> (if any) involved in setting the AP communication to not use IPSEC
> tunnels, but to rely on the encryption on the GRE VPN tunnel instead?
> > Thanks!
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------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

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