Re: Blackberry MDS Connection Bypassing firewall

[Chris Myers <clmmacunix () charter net>]

If you don't want any 3rd party app : ) It looks like if they already  
have it then another approach needs looked at, but the Blackberry  
seems to have its own IT Policy. The URL below shows how to get the  
SSH running if it does not work, but reverse engineering it will tell  
you what you can put in place that causes these errors, hence not  
allowing access outbound for SSH for the Blackberry.

   1. Open the BlackBerry Manager.
   2. On the Tree tab, right-click the BlackBerry Enterprise Server  
server and select IT Policy. The IT Policy settings for BlackBerry  
Server window appears.
   3. Click Edit. The Edit IT Policy window appears.
   4. Clear the Disallow Third Party Application Downloads checkbox.
   5. Click OK.

Note: Depending on the version of your BlackBerry Enterprise Server,  
this IT Policy setting may also be called  
DisallowThirdPartyAppDownloads or Disallow 3rd Party Applications.


http://www.rovemobile.com/support/faqs/ssh/



On Jan 17, 2008, at 10:38 AM, Erik LaBianca wrote:

> My guess is that the best way to solve this problem would be to  
> isolate the BES on its own system (blackberry recommends this  
> anyway) and then restrict that computers egress access as necessary.  
> All BES/MDS connections coming in from RIMM and through the proxy  
> will then get handled by your regular firewall.
>
> --erik
>
> From: firewall-wizards-bounces () listserv icsalabs com [mailto:firewall-wizards-bounces () listserv icsalabs com 
> ] On Behalf Of miedaner
> Sent: Friday, January 11, 2008 10:47 AM
> To: firewall-wizards () listserv cybertrust com
> Subject: [fw-wiz] Blackberry MDS Connection Bypassing firewall
>
> Hi,
>
> Wondering if anyone has dealt with this problem with BES.
>
>
> Blackberry enterprise server is configured by default to allow TCP  
> traffic from the Blackberry clients through the encrypted BES  
> connection to a internal network.  As the Blackberries are java  
> based some clever folks have built things like SSH clients for them.
>
> The problem is that this type of access bypasses firewall and VPN  
> rules.
>
> I know that there are ACL's possible on the MDS connection service  
> that allows this but I am told that it is either block all tcp or  
> block none.
>
> I am wondering if anyone knows if the BES ACl really is all or none  
> and if anyone has implemented a solution to restrict internal  
> network access through BES to only protocols like http or hhtps.
>
> TIA
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> firewall-wizards mailing list
> firewall-wizards () listserv icsalabs com
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