Sonicwall TZ100: restrict access to certain device for dropbox.com and synology.com?

Hi,

I'd like to limit access for my nas to update servers from synology and dropbox.com.
Can I do this on domain names or should I enter ip addresses, if addresses where to find a good reference for ranges to use?

Please advise.
J.
janhoedtAsked:
Who is Participating?
 
carlmdCommented:
I did an nslookup on dropbox.com and synology.com and got the following.

# nslookup dropbox.com
Server:  name
Address:  192.168.1.71

Non-authoritative answer:
Name:    dropbox.com
Addresses:  108.160.166.62, 108.160.165.62

# nslookup synology.com
Server:  name
Address:  192.168.1.71

Non-authoritative answer:
Name:    synology.com
Address:  59.124.41.242

Yes you can use the url if you want, to create the address object. See the following.

https://www.fuzeqna.com/sonicwallkb/ext/kbdetail.aspx?kbid=7486

See the following to set rule priority.

https://www.fuzeqna.com/sonicwallkb/ext/kbdetail.aspx?kbid=3716
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carlmdCommented:
Do you mean that you want to block all access to those two URL's from the nas?
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janhoedtAuthor Commented:
No, the opposite. Nas should only be able to connect to those urls.
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carlmdCommented:
Ok, since dropbox has two ip addresses and synology has only one, I would use the ip addresses. On the Sonicwall...

1. Define an address object for the NAS, synology, and two for dropbox. Then combine all but the NAS into a new group like nastargets.

2. Create a firewall rule to permit nothing from the NAS to WAN.

3. Create a new firewall rule to permit all from the NAS to the nastargets (new group). Be sure that this rule appears before the one in 2. that permits nothing.

You should now be able to connect to only those two sites from the NAS.
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janhoedtAuthor Commented:
Thanks. But pls specify:

> Ok, since dropbox has two ip addresses >and synology has only one, I would use the >ip addresses. On the Sonicwall...

What ip addresses would that be then? I can hardly imagine Dropbox would have only 2, synology 1 ip address. They use ip ranges not only 1 or 2 ip s. I was looking for those addresses/ranges as I mentioned in my question.
Much better would domain names be as they are flexible (Dropbox or Syn can add remove addresses randomly).
Hiwever not sure if Sonicwall supports that. That s my q. Configuring is not big a deal.
Note: you cannot change priority of rule in tz100, not that I m aware of or can see in the gui.
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janhoedtAuthor Commented:
Nslookup gives dns names not ip addresses which are used by a company.
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carlmdCommented:
nslookup provides both an ip and a name (domain) which is typically what you typed. It queries a DNS domain nameserver to lookup and find IP address information of computers in the internet. Convert a host or domain name into an IP address.

See prior post. Also as indicated you can use the url if desired.
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janhoedtAuthor Commented:
Can I user wildcards? *.synology.com doesn't seem to work.
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carlmdCommented:
No, create each unique url as a separate address object and then put them in a group.
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janhoedtAuthor Commented:
Ok, but I have no clue about the url s. So then I better use the ip s you mentioned. However, I still don t get how synology and Dropbox only consist of 1/2 ip s. There are many servers behind it, why/how only 1 ip?
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carlmdCommented:
EXACTLY what do you type/use (URL?) to access these two sites, and how are you doing it? For example a program or app from your NAS?
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janhoedtAuthor Commented:
I just want my nas (Synology) to be able to access Synology update servers, then I want the dropbox app on my Synology to be able to connect to Dropbox. I'm doing nothing myself, the Synology needs only to have appropriate access.
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janhoedtAuthor Commented:
How? I limit every access from lan to wan and only enable certain acccesses: f.e. synology http/https to ip or url.
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janhoedtAuthor Commented:
Note: the lan to wan any is deny, priority is on 12. Not sure what figure to fill in there, think it's the lowest possible?
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carlmdCommented:
You can use either the ip's or url if you know exactly what they are.

The lan to wan deny for the NAS priority does not matter, as long as the permit rule is above it.
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