Sounds like that pretty much. Can see traffic coming back from their server 
though.

Terri Kelley
Network Engineer
254-697-6710
Farm to Market Broadband
www.farm-market.net



On Jun 23, 2010, at 7:01 PM, Bill Prince wrote:

> We ran traces on it, and it stopped before that in our observation.
> 
> When the femtocell first starts up it does a few dozen NTP calls to at least 
> 4 different NTP servers, then starts handshaking with the server via SSL.  
> Finally, when it gets around to key exchange, the femtocell sends a couple of 
> fragmented packets, and the server does not respond.
> 
> We ran at least 4 or 5 different traces, and that was pretty much the 
> sequence each time.
> 
> 
> bp
> 
> 
> On 6/23/2010 4:52 PM, Terri Kelley wrote:
>> In ours, AP is bridged and the cpe is routed with NAT. Seems it stops at the 
>> CPE on the way back to the customers microcell.
>> 
>> Terri Kelley
>> Network Engineer
>> 254-697-6710
>> Farm to Market Broadband
>> www.farm-market.net
>> 
>> 
>> 
>> On Jun 23, 2010, at 6:38 PM, Chuck Hogg wrote:
>> 
>>   
>>> It's working on our network without any special config.  We're
>>> completely routed.
>>> 
>>> Regards,
>>> Chuck Hogg
>>> Shelby Broadband
>>> 502-722-9292
>>> [email protected]
>>> http://www.shelbybb.com
>>> 
>>> 
>>> -----Original Message-----
>>> From: [email protected]
>>> [mailto:[email protected]] On Behalf Of Terri Kelley
>>> Sent: Wednesday, June 23, 2010 5:54 PM
>>> To: Mikrotik discussions
>>> Subject: [Mikrotik] 4500 traffic
>>> 
>>> I have a customer wanting to use an AT&T microcell on his connection but
>>> can't seem to get it to work.
>>> His CPE is a 411AH on 2.4, only firewall are input rules on the 411 and
>>> there is NAT.
>>> Ethernet side of the 411 is connected directly to the microcell unit.
>>> I see it in the arp table and can watch via torch, traffic going out. It
>>> is using UDP 4500 trying to build the tunnel.
>>> I can watch on the tower and see the response on 4500 coming back.
>>> I see the traffic reach the wan interface of the cpe, port 4500.
>>> But it looks like it is failing to pass through that cpe.
>>> 
>>> Any ideas why this is the case?
>>> I would like to try to solve the mystery rather than just bridge the
>>> unit.
>>> 
>>> Thanks,
>>> 
>>> Terri Kelley
>>> Network Engineer
>>> 254-697-6710
>>> Farm to Market Broadband
>>> www.farm-market.net
>>> 
>>> 
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