How to enable the Software Firewall on a Synology DS 713+ running DSM 5.0-4458
The reason for this implementation is to have a successfully firewall solution that protects our SHASS Synology users who have an MIT username and password.
With my Synology running DSM 5.0-4458, you can set the Synology’s Firewall allow access to MIT users in the 18.0.0.0/8 address block but deny access to everyone else.
How to do this:
1) Log into the web management tool via port 5000 or 5001.
2) Go to Control Panel -> "Security" -> Select the "Firewall" Tab
3) Click Create. The "Create Firewall Rules" window will come up
4) Ports -> All
5) Source IP -> Subnet
6) IP Address: 18.0.0.0
7) Subnet Mask: 255.0.0.0
8) Action -> Allow
9) Click OK
You should see a line with the new firewall setting allowing in all traffic from the MIT 18.0.0.0 IPv4 range.
Now that we’ve allowed anyone from MIT to access the server it is time to deny access to everyone else.
1) At the bottom of the Control Panel -> Firewall window there should be a line that starts with “If no rules are matched”
2) Click on "Deny access”.