iPhone DNS issue "Jasper Recto" <jrecto99[ at ]yahoo.com> 12/8/2008 7:32:52 PM I have a problem with the iPhone receiving my corporate email when I'm in my office because of an issue with the active sync push feature. I looked up on the Apple website and this is what they said: "When roaming between home and office networks with Wi-Fi enabled, "push" may stop working if your company's Exchange ActiveSync server has a different IP address for intranet and Internet clients. Make sure the DNS for your network returns a single, externally-routable address to the Exchange ActiveSync server for both intranet and Internet clients. This is required so the device can use the same IP address for communicating with the server when both types of connections are active." Can somebody explain to my what DNS entry I need to make to allow this to work. I don't quite understand on how to make a entry that is both externally routable for both intranet and Internet clients. Thanks! Jasper

Re: iPhone DNS issue "Mark Arnold [MVP]" <mark[ at ]mvps.org> 12/8/2008 8:02:15 PM On Mon, 8 Dec 2008 14:32:52 -0500, "Jasper Recto" <jrecto99[ at ]yahoo.com> wrote: [Quoted Text] >I have a problem with the iPhone receiving my corporate email when I'm in my >office because of an issue with the active sync push feature. > >I looked up on the Apple website and this is what they said: > >"When roaming between home and office networks with Wi-Fi enabled, "push" >may stop working if your company's Exchange ActiveSync server has a >different IP address for intranet and Internet clients. Make sure the DNS >for your network returns a single, externally-routable address to the >Exchange ActiveSync server for both intranet and Internet clients. This is >required so the device can use the same IP address for communicating with >the server when both types of connections are active." > >Can somebody explain to my what DNS entry I need to make to allow this to >work. I don't quite understand on how to make a entry that is both >externally routable for both intranet and Internet clients. > >Thanks! >Jasper > Your Exchange server has a URL of "Mail.domain.com" Your device has that URL configured and can sync over the Internet/other company network, whatever. So, when you go into the office and use your own corporate wireless LAN there must also be a "mail.company.com" that translates to an internal IP address.

Re: iPhone DNS issue "Jasper Recto" <jrecto99[ at ]yahoo.com> 12/8/2008 8:24:33 PM I see! Thanks!! Jasper "Mark Arnold [MVP]" <mark[ at ]mvps.org> wrote in message news:o2vqj4louunrd9epc896n3c985fs9bdl6b[ at ]4ax.com... [Quoted Text] > On Mon, 8 Dec 2008 14:32:52 -0500, "Jasper Recto" <jrecto99[ at ]yahoo.com> > wrote: > >>I have a problem with the iPhone receiving my corporate email when I'm in >>my >>office because of an issue with the active sync push feature. >> >>I looked up on the Apple website and this is what they said: >> >>"When roaming between home and office networks with Wi-Fi enabled, "push" >>may stop working if your company's Exchange ActiveSync server has a >>different IP address for intranet and Internet clients. Make sure the DNS >>for your network returns a single, externally-routable address to the >>Exchange ActiveSync server for both intranet and Internet clients. This is >>required so the device can use the same IP address for communicating with >>the server when both types of connections are active." >> >>Can somebody explain to my what DNS entry I need to make to allow this to >>work. I don't quite understand on how to make a entry that is both >>externally routable for both intranet and Internet clients. >> >>Thanks! >>Jasper >> > Your Exchange server has a URL of "Mail.domain.com" > Your device has that URL configured and can sync over the > Internet/other company network, whatever. > So, when you go into the office and use your own corporate wireless > LAN there must also be a "mail.company.com" that translates to an > internal IP address.

Re: iPhone DNS issue "Jasper Recto" <jrecto99[ at ]yahoo.com> 12/8/2008 9:04:50 PM Mark, One more question. It says that I need an "externally-routable address to the Exchange server for both intranet and Internet clients so the device can use the same IP address for communicating with the server when both types of the connections are active" From outside our company, 'mail.company.com' references an external IP address where inside the company it references an internal IP address. Does this statement mean that I need to make an entry so that the internal IP matches the external IP? Thanks! Jasper "Mark Arnold [MVP]" <mark[ at ]mvps.org> wrote in message news:o2vqj4louunrd9epc896n3c985fs9bdl6b[ at ]4ax.com... [Quoted Text] > On Mon, 8 Dec 2008 14:32:52 -0500, "Jasper Recto" <jrecto99[ at ]yahoo.com> > wrote: > >>I have a problem with the iPhone receiving my corporate email when I'm in >>my >>office because of an issue with the active sync push feature. >> >>I looked up on the Apple website and this is what they said: >> >>"When roaming between home and office networks with Wi-Fi enabled, "push" >>may stop working if your company's Exchange ActiveSync server has a >>different IP address for intranet and Internet clients. Make sure the DNS >>for your network returns a single, externally-routable address to the >>Exchange ActiveSync server for both intranet and Internet clients. This is >>required so the device can use the same IP address for communicating with >>the server when both types of connections are active." >> >>Can somebody explain to my what DNS entry I need to make to allow this to >>work. I don't quite understand on how to make a entry that is both >>externally routable for both intranet and Internet clients. >> >>Thanks! >>Jasper >> > Your Exchange server has a URL of "Mail.domain.com" > Your device has that URL configured and can sync over the > Internet/other company network, whatever. > So, when you go into the office and use your own corporate wireless > LAN there must also be a "mail.company.com" that translates to an > internal IP address.

Re: iPhone DNS issue "Mark Arnold [MVP]" <mark[ at ]mvps.org> 12/8/2008 10:20:54 PM On Mon, 8 Dec 2008 16:04:50 -0500, "Jasper Recto" <jrecto99[ at ]yahoo.com> wrote: [Quoted Text] >Mark, > >One more question. >It says that I need an "externally-routable address to the Exchange server >for both intranet and Internet clients so the device can use the same IP >address for communicating with the server when both types of the connections >are active" > >From outside our company, 'mail.company.com' references an external IP >address where inside the company it references an internal IP address. Does >this statement mean that I need to make an entry so that the internal IP >matches the external IP? > >Thanks! >Jasper > That's all you need.Just make sure the names and IPs say the right things in the right places.