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File browsing over PPTP connection to a NAS stuck.

Posted on 2013-11-22
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Last Modified: 2013-12-03
Hello,

I have a small office network without a server.
This network is protected with a hardware firewall from Netasq U30.
In this network we have a 2-bay NAS: Thecus NX2200XXX

Since we got a customer in this office that will work from remote locations we had to setup a PPTP connection. This is working perfect!
I can PING all over the network without any problems, i get my shared disks from the NAS connected and i can start browsing. Aslong as i don't see any file and only the folder structure it goes good. As soon as i see 1 .txt file or any other type of file the connection gets interupted.

We thougt it would be an Firewall issue, we had alot of contact with the Netasq Support and after a few tests they told us that it cannot be the firewall.
- We made a Pass all test.
- We put the PPTP Range (DHCP) in the ASQ Bypass
- The NAS has been put in the ASQ Bypass aswell.
- Create filter rules with a the NAS to Network in with ASQ options; Do not attack plugin & No contextual signatures.

This should be enough to pass the firewall without being hold on ports or ASQ options.
As a test we have placed a Synology DS213+ on this location, this NAS has the same issue.

We made a support ticket by Thecus and so far we had no answer yet. We did get response and they have send this ticket to the head location of Thecus.

Local file browsing is not a single problem, also file browsing to a local PC with the same PPTP connection is not a problem. I can open all files from this computer.

Anyone can help me out on this?
Are there extra ports or options on the NAS that would interupt possibly the connection with PPTP?
Could it be an issue with the NAS?


** Extra Info:
- We are testing at this moment and with a FTP connection i get the same issues, i see the map structure but when i click the map i get in the map but it start loading the file and then it gives the following error:

Error on opening FTP error. Ensure you have permission to open this folder.

I am very sure the user i connect with has the right permissions. As well with the user profile as with the admin profile tested.
Also reconfigured the FTP rights on the share for both users.
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Question by:eltie
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Accepted Solution

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eltie earned 0 total points
ID: 39691940
Problem is solved.

In the firewall are ASQ plugins that are running for SMB.
Those are activated and appear to stay active even with a bypass.
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