Hi,

Even I am facing the same problem. Could you please let me know if you 
could get the scenario with VPN working?

Thanks.

On Wednesday, 2 January 2013 22:39:19 UTC+5:30, In Hwa Choi wrote:
>
> Hello. I am application developer for MDM on android.
> I would like to ask some question for firewall setting for GCM push 
> server..
> My product provide MDM functions on android smart phone by using GCM push 
> service for sending message from MDM server to MDM client(smart phone).
> Recently, My customer want to working MDM service under their VPN. 
> They want to block almost internet service except their intranet and at 
> least site.
> So they use VPN to access from smart phone to their intranet directly.
>
> Now we have faced some problem. 
> MDM messages are not transferred from MDM server to MDM client because of 
> VPN. When I did test without VPN, the MDM message is received by MDM 
> client. 
> I have already added IP range,"74.125.235.160 ~ 74.125.235.175 for 
> Inbound" as VPN setting to bypass some message from GCM server. But it is 
> not working. So I want to know the IP ranges for GCM server. 
>
> I have already read "http://developer.android.com/google/gcm/gcm.html";. 
> In this page, there is some guide how to set the firewall to use GCM push 
> service as like below sentence.
> In the below sentence, they suggested some guide by link page on "this 
> support link". But this is not working.
> the url of linked page is "
> http://support.google.com/code/bin/answer.py?hl=en&answer=62464";.
>
> *Note:* If your organization has a firewall that restricts the traffic to 
> or from the Internet, you'll need to configure it to allow connectivity 
> with GCM. The ports to open are: 5228, 5229, and 5230. GCM typically only 
> uses 5228, but it sometimes uses 5229 and 5230. GCM doesn't provide 
> specific IPs. It changes IPs frequently. We recommend against using ACLs 
> but if you must use them, take a broad approach such as the method 
> suggested in this support 
> link<http://support.google.com/code/bin/answer.py?hl=en&answer=62464>
> .
>
> is there anyone to provide some clue for solving this problem?
>

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