File server (SMB server): what it is and how it is attacked
Holds shared documents everyone can reach over the network.
Also known as
- SMB server
- network share
Typing any of them into the editor finds this object.
Why it matters on a security diagram
Broad access by design, which is why ransomware reaches so much of an organisation through it.
How it gets attacked, and what reduces it
How it gets attacked
- Shares open to everyone rather than to a specific group
- Used as the route to reach many machines at once
What reduces it
- Grant shares to named groups, never to everyone
- Keep previous versions and snapshots under separate credentials from the live data
- Limit how much one workstation account can reach, since that is the path encryption takes
Where it sits
- Group
- Servers · Machines that run something for other machines.
- Whose side, by default
- Ours · Belongs to the organisation the diagram is about.
- Catalogue identifier
- file-server
Reviewed . CC BY 4.0.
Others in servers
- Serverhost · machineA computer that runs something for other computers.
- Web serverHTTP server · websiteThe computer that sends your website to anybody who visits it.
- Application serverbackend · business logic tierRuns the working parts of an application, behind the website.
- DatabaseDB · SQL server · data storeStores the organised information an application depends on.
- Mail serveremail server · Exchange · SMTPSends, receives and stores the organisation's email.
- Name serverDNS · domain name serverTranslates names like example.com into network addresses.
- Virtual machine hosthypervisor · ESXi · Hyper-VOne physical server pretending to be many.
- Jump hostbastion · jump box · hardened admin hostThe single controlled machine administrators go through to reach sensitive systems.
- Backup serverbackup · Veeam · backup controllerMakes and manages the spare copies of your data that let you recover after something goes wrong.
- Update serverWSUS · patch server · software distributionDistributes software updates to every machine.
- Build pipelineCI/CD · Jenkins · GitHub ActionsThe automated production line that turns written code into the software the business actually runs.
- Phone systemVoIP · PBX · telephony serverRuns the organisation's telephone calls over the network.
The servers group lists all 13 of them side by side.
File server on your own diagram
Open the editor, press N, and type SMB server. The object is placed and connected to whatever was selected, and Tab adds the next one already joined to it. Nothing is uploaded: the page is served with a Content Security Policy that forbids the browser from making any outbound request at all.
Open the diagram maker