OWA blocked by China

Lyle Giese lyle at lcrcomputer.net
Tue Mar 27 09:43:57 CDT 2012

On 03/27/12 09:39, Leigh Porter wrote:
> Are there any issues with general https there also?
> --
> Leigh
>> -----Original Message-----
>> From: Lyle Giese [mailto:lyle at lcrcomputer.net]
>> Sent: 27 March 2012 15:39
>> To: nanog at nanog.org
>> Subject: Re: OWA blocked by China
>> On 03/27/12 09:16, Jim Gonzalez wrote:
>>> Hello,
>>>                   One of my customers has workers in China. There
>>> outlook web access is blocked by the China Firewall. I was just
>>> wondering if anyone had this issue ? I have not tried any work
>> arounds
>>> as of yet just gathering info
>>> Thanks in advance
>>> Jim Gonzalez
>> Common practice in China.  Typically the block comes and goes. Here
>> today, gone tomorrow.
>> However if the OWA server is on a dynamic IP or you use a dynamic IP
>> address service for ip  address resolution, then it will be blocked all
>> the time by China.
>> It's just the way things are done over there.
>> Lyle Giese
>> LCR Computer Services, Inc.
Not in general, it appears that most of the blocks seem to occur at the 
DNS level from my experience.  However we have seen blocks on port 80 or 
443 but infrequently.

I have had a customer with sales persons in China for about 10 years now 
and they are ones that are quick to complain.  So we have gone through 
the cycles of various blocks over the years.  But putting their in house 
server on a static IP address and getting their OWA server address 
resolution out of dynamic name resolution services seemed to help the most.

Lyle Giese
LCR Computer Services, Inc.

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