Sonicwall - Cannot Connect Mobile Devices to Exchange

      I have just installed a Sonicwall TZ 205. Before installing this firewall everything was working fine. We are using Exchange 2013 on Windows Server 2012 R2. I now have it set up and I can send and receive email from the PCs Outlook on the network but now I cannot connect with mobile devices. I included IMAP, POP 3, HTTP, HTTPS and SMTP in the service object for email services. Is there another step I am missing?

Thank you
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bbaoIT ConsultantCommented:
> but now I cannot connect with mobile devices.

now? did it work before?

BTW, when you say "PCs" and mobile devices, you are referring to those hosts accessing the mail server across the Internet, not any local hosts on your internal LAN. am i correct?
daskas27Author Commented:
Anything on the network behind the firewall works fine, (phones, PCs, tablets, etc.). When outside the network Activesync cannot connect.

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As you correctly identified you need:
Port numbers used by ActiveSync
Firewall logs
I bet right now, those mobilw devices would connect fine from outside the network.

Create a loopback rule on the Sonicwall. That will allow devices inside the network making references to servers to connect from inside.
bbaoIT ConsultantCommented:
> When outside the network Activesync cannot connect.

two things need to be investigated further.

1. if external DNS has been correctly configured. to test it, try using IP address instead of FQDN when giving the host name of email server or any of other services.

2. if the firewall has been correctly configured for incoming traffic on the given protocols and ports. for SonicWALL devices, there is a trick that for any incoming traffic the admin needs to define TWO sets of similar rules, one is for NAT policy, the other is for firewall rules. if you are not sure if you have done ALL of them, please show us the firewall settings in details against the given protocols including IMAP, POP 3, HTTP, HTTPS and SMTP.

hope it helps,
I misread. Did you define services and go through the public server wizard? In the services section, you can create a group of services whose ports will need to be opened. The public server wizard will do the rest of the work to let you have things open to the outside world.
daskas27Author Commented:
It was the changing of the management port to 444 that fixed it. Thank you all.
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