Question 1

How secure is this against malicious attacks? Does it have a firewall and anti-virus software?

Accepted Answer

The DSM software come with a number of features to prevent malicious attacks.  One of my units was hit with a ransomware attack.  Nothing import on the unit as it was used for security camera video storage.  I believe I was hit with what is called man in the middle hack.  My credentials were taken when I periodically logged in to view the camera images.  I was not taking the security seriously.  Now I have turned on HTTPS and 2FA (two factor authentication).  Point is that the features are there to secure you NAS but you have to make use of them.  Hope this helps.

Question 2

would this unit support a NVME cache module?

Accepted Answer

Yes the Synology DS1522+ supports 2 of the NVMe M.2's in mirror (RAID1) for write-back cache, or just 1 of them for read-only cache. (You cannot force it to use 1 of them for read-write). Starting with the year 2022 models, as of date of this review October 2022, Synology no longer lists as compatible any drive except their own brand (vendor-lock). However, if you look at the prior version of this unit Synology 1520+, you'll see other options that DO work like certain Seagate m.2 Ironwolf (but not all of them)..

Unfortunately, the Synology DSM 7.1 in these newer 2022 models will currently show a warning anything except their own brand of drives may not support all features and compatibility is not guaranteed either. Customers are not happy about this vendor-lock situation, hopefully Synology will cave in and certify other drives in the future.

Question 3

Can you install a 10gb nic in here?

Accepted Answer

No, this model does not have the slot for the 10gb nic.  You can see this by the absence of a square cutout such as the one on the back of the ds1522+.

Question 4

How often is the os/firmware patched?  i'd like to verify that this nas stays as secure as possible.

Accepted Answer

As needed. I've had a few updates (3 or 4) since I purchased my DS220+ last fall. Your NAS should be behind your router/firewall, and I don't allow access to mine outside of my network/home. Personally, I have no need to access it from the Internet, aside from update downloads.

ASIN	B0B4DFBRZV
Best Sellers Rank	#42,225 in Computers ( See Top 100 in Computers ) #29 in Network Attached Storage (NAS) Enclosures
Brand	Synology
Built-In Media	1 x DS1522+ main unit; 1 x Quick Installation Guide; 1 x Accessory pack; 1 x AC power adapter; 1 x AC power cord; 2 x RJ-45 LAN cables
Color	Black
Compatible Devices	Server, Hard Drive, Storage Array
Customer Reviews	4.6 4.6 out of 5 stars (495)
EU Spare Part Availability Duration	3 Years
Enclosure Material	Metal
Is Assembly Required	No
Item Dimensions D x W x H	23.3D x 23W x 16.6H centimeters
Item Type Name	Synology NAS
Item Weight	4190 Grams
Manufacturer	Synology
Mfr Part Number	DS1522+
Model Number	DS1522+
Mounting Type	Tabletop
Number of Items	1
Size	DS1522+
UPC	846504004461
Unit Count	1 Count
Weight Capacity	Minimum weight: 4.19 kg

Synology 5-bay DiskStation DS1522+ (Diskless),Black

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