Iphone VPN

I am connecting an iphone to a ipsec vpn and i can resolve by ip (ex.
and FQDN (ex. hamburg.hamep001.com) but not just hamburg.  i am using a fortigate 500a any idea's ???
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I've been poking around on my iPhone 4 with iOS 5.0.1.  It appears to me that the best explanation (which is probably obvious) is the iPhone is not paying any attention to the domain name attribute it should be receiving from the DHCP server when it acquires an IP address.  Our DHCP server definitely hands out the domain name as part of the DHCP lease, like "domain.com".  It's then up to the client system to append the suffix "domain.com" to "servername" if a FQDN is not used in a lookup (this behavior can be controlled on Windows systems in the network adapter advanced properties, DNS; or group policy).  The iPhone's error message when I attempt to ping "server" from the phone is "DNS Lookup Failed".  "server.domain.com" works.  

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Forgot to mention, I see no place on the iPhone side to specify the domain name for a VPN connection.  So the only other place the phone could get that is from the DHCP server.
dcolangeloAuthor Commented:
Thank you for responding you are exactly correct and
I did an update to our firewall and the update gave
Allowed me to specify a domain to the VPN connection
And that worked :)

Thanks again
This is strange.  I did some testing on an iMac connecting to the same VPN I was trying on the iPhone.  The iMac picks up the domain name from DHCP so that I can ping "server" and it appends "domain.com" to it to make a FQDN.  The iPhone does not do that.
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