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Old 03-10-2006, 11:21 AM   #1 (permalink)
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Default how does a blackberry communicate with BES

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Hi There,

I am a network analyst and we are currently looking into buying blackberrys and installing them. We have a few hurdles to over come that I have found work arounds for (i.e. our main email is MDAEMON so we are going to use sbs exchaneg on a small domain and relay email between the two). What I want to know is, how do blackberry devices communicate with the Blackberry enterprise server? do they use DNS or do they use ip addresses?

thanks,

Paul
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Old 03-10-2006, 11:30 AM   #2 (permalink)
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here is a flowchart
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File Type: jpg bes.jpg (48.5 KB, 129 views)
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Old 03-10-2006, 11:32 AM   #3 (permalink)
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blackberry device connects to a bes via:(simple version)

The carriers network, which the bb device has an ip. Which then connects to RIMs network and from there via an srp ID number is routed to the bes.
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Old 03-10-2006, 11:33 AM   #4 (permalink)
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Quote:
Originally Posted by paulow1978
Hi There,

I am a network analyst and we are currently looking into buying blackberrys and installing them. We have a few hurdles to over come that I have found work arounds for (i.e. our main email is MDAEMON so we are going to use sbs exchaneg on a small domain and relay email between the two). What I want to know is, how do blackberry devices communicate with the Blackberry enterprise server? do they use DNS or do they use ip addresses?

thanks,

Paul
Posts like this one make me feel dumb. Here is my best attempt at an answer: they use BlackBerry talk.

(Kidding aside, place this question in the thread I posted below and I'm sure you will get answers. It's the BES Admin forum.)

http://www.blackberryforums.com/bes-admin-corner/
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Old 03-10-2006, 11:39 AM   #5 (permalink)
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mods, could you move this thread to the bes admin corner?
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Old 03-10-2006, 11:42 AM   #6 (permalink)
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Quote:
Originally Posted by murpheous
mods, could you move this thread to the bes admin corner?
Done.
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Old 03-10-2006, 11:49 AM   #7 (permalink)
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thasnks for the replies...

Ok my problem is this, I want the blackberry device to be able to get to my blackberry enterprise server without registering a domain with an ISP is this possible? (I won't bore you with why I want to do this but it is to do with the fact that we have 2 mail servers, one mdaemon and one exchange)

thanks,

Paul
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Old 03-10-2006, 11:52 AM   #8 (permalink)
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so when it reaches rims network and needs to get to my blackberry enterprise server does it use dns or straight ip?
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Old 03-12-2006, 12:49 AM   #9 (permalink)
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OK, i assume that you already have a mail domain for your MDAEMON that can properly send and receive (route) emails from the Internet and now you just want to use BES on top of Microsoft SBS server with Exchange. Pretend that BES is not in the picture, can you configure MS Exchange to host mailboxes that can send and receive email from the internet? If the answer is yes then you can install the new BES server with just minor network change (allow outbound TCP port 3101 to RIM).

BES does not route email, it just relays messages between the RIM network (handhelds) and your Exchange (mailboxes) server. The Exchange server itself or to be more specific, the Exchange's SMTP server, handles mail routing to external mail domains.
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Old 03-13-2006, 04:03 AM   #10 (permalink)
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Yes, thats pretty much the scenario. I was going to get exchange email relayed through our Mdaeomon server. (incoming email can be forwarded to the exchange server and outgoing relayed by MDaemon. I was going to put a new zone in the dns server for the sbs servers domain and add an mx record so that when Mdaemon forwards emails to exchange it can resolve the ip address of the exchange server privately (thus getting around not having to register the sbs domain). But my problem has always been (becasue i know very littelabout the way blackberry's work) how a device will talk to the bes server at my company. I wanted to find out how they communicate, how do they find eachother over the network, do they use ip addreses or is it a completely different network (i.e. ipx compared to tcp).
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Old 03-13-2006, 08:46 AM   #11 (permalink)
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we have a sendmail environment frontending our Exchange environment. the Exchange environment has an internal routing domain (similar to what you were talking about) with the sendmail environment being our MX record (to an extent) with redirects to our Exchange environment.

your MX record (and users' external SMTP address) needs to be valid and addressable from the internet. as long as you can receive internet email and route it to your users' mailboxes, you should be fine.
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Old 03-13-2006, 09:34 AM   #12 (permalink)
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Quote:
Originally Posted by paulow1978
But my problem has always been (becasue i know very littelabout the way blackberry's work) how a device will talk to the bes server at my company.
It's the job of the BES to find the devices out in the field and open up a secured tunnel to each one of them. Once the tunnel has been created, the device can use it to talk back to the BES.

Since the devices aren't the ones initiating the communication with the BES, you don't have to programming the devices with your domain name. As mentioned above, your firewall will have to let the BES talk out to the Internet on port 3101, but you do not need to open up anything for incoming connections, as there aren't any.

IIRC, when the devices turn on, they register themselves with BlackBerry's NOC. When your BES wants to open a tunnel to a device, it uses BlackBerry's NOC to find the IP address of the device.
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