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1465 posts

Uber Geek


#56980 30-Jan-2010 14:20
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I recently had reason to query whether XNet was blocking port 445 (they were) and in the course of answering my question XNet sent me the following comprehensive list of all ports blocked.  I thought it might be useful for reference purposes :)  It is not possible to unblock ports on a per-user basis (with the exception of port 25 - see below).  BTW, I emailed them today (sat avo) and got a reply within 30min!  10 points for XNet service!!

Hi Sam,

Yes, 445 is blocked for security reasons.

The following ports are blocked on the Xnet Network TCP/UDP. A static
route can be added via to remove the port 25 block.

None of the other ports will be unblocked as they are blocked due to
security holes and possible exploitation.

tcp any any eq 25

tcp any any eq 135
udp any any eq 135

tcp any any eq 137
udp any any eq 137

tcp any any eq 139
udp any any eq 139

tcp any any eq 445

tcp any any eq 593

tcp any any eq 4444

tcp any any eq 3997

tcp any any eq 2745

I apologise for any inconvenience this may cause, however we need to
consider the security of the network for our customers.

Best regards,

Technical Response Representative
WorldxChange Communications Ltd
0800 14 9638

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8035 posts

Uber Geek


  #294639 30-Jan-2010 14:38
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Pretty sensible list of ports to be blocked.

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Uber Geek


  #294641 30-Jan-2010 14:55
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It's a pity they don't provide for a a 'Power Users' group for those of us who know what they're doing & are prepared to take the risk. Hell, I'd sign a waiver to have full access!


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Uber Geek


  #294645 30-Jan-2010 15:11
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Yeah but why do you need port 445 for? It's normally used for SMB on a local network.

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Uber Geek


  #294646 30-Jan-2010 15:13
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I want to connect to an online storage provider on that port.

203 posts

Master Geek


  #294675 30-Jan-2010 18:08
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Which would be awfully insecure, you're risking your own data then

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Uber Geek


  #294693 30-Jan-2010 19:13
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when I was at a certian second rate ISP there was someone who had 137/139 open on a dsl connection so that they could print to it. One day telecom blocked it. He was not happy and didnt seem to see that having it exposed was a problem.


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Uber Geek


  #294699 30-Jan-2010 19:37
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bender: Which would be awfully insecure, you're risking your own data then

No more insecure than FTP!

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