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I can't access samba service via VM endpoints (137,138,139,445)

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We used it as shared storage.
And now we're not
I wish you would tell me why!-
I wanna build a linux network file storage.
It doesn't have to be a "samba".

..

I want to use my linux VM as network file storage from external client.  

Last year (2013), 
I setted up samba (@Ubuntu 12.04 LTS) and It works very well. 
but suddenly it doesn't work. 


I checked those points.

#1 samba still work well in localhost 
smbclient -L //localhost

#2 allow all hosts in smb.conf 
hosts allow = 0.0.0.0/0

#3 allow 137, 138, 139, 445 ports in linux firewall (ufw)

#4 I already check VM End-point 137, 138, 139, 445 

but it doesn't work. and tcpdump doesn't show any packet. 


and I can find related thread. 
http://social.msdn.microsoft.com/Forums/windowsazure/ko-KR/8925c569-2315-4182-8d2b-f8f58bf3e668/problem-about-vm-endpoints

Q: 'I would like to know if Azure will block port 137, 138, 139, 445? '
A: 'We block those ports by default. We are working on changing this policy. I will update this if there are changes made.'

and I can't understand the answer's meaning  cause my poor english. 
that means "I can't unblock those port. is it not available? " 
and are there more detail reasons why block those port or list of blocked ports? 

Thanks 



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