8.4. Multi Tenancy

8.4.1. Introduction

Multi tenancy support allows for different rule sets with different rule vars. These tenants can then be assigned to VLANs or interfaces (devices).

8.4.2. YAML

In the main (“master”) YAML, the suricata.yaml, a new section called “multi-detect” should be added.

Settings:

  • enabled: yes/no -> is multi-tenancy support enable
  • default: yes/no -> is the normal detect config a default ‘fall back’ tenant?
  • selector: direct (for unix socket pcap processing, see below), vlan or device
  • loaders: number of ‘loader’ threads, for parallel tenant loading at startup
  • tenants: list of tenants
    • id: tenant id
    • yaml: separate yaml file with the tenant specific settings
  • mappings:
    • vlan id or device
    • tenant id: tenant to associate with the vlan id / device
multi-detect:
  enabled: yes
  #selector: direct # direct or vlan
  selector: vlan
  loaders: 3

  tenants:
  - id: 1
    yaml: tenant-1.yaml
  - id: 2
    yaml: tenant-2.yaml
  - id: 3
    yaml: tenant-3.yaml

  mappings:
  - vlan-id: 1000
    tenant-id: 1
  - vlan-id: 2000
    tenant-id: 2
  - vlan-id: 1112
    tenant-id: 3

The tenant-1.yaml, tenant-2.yaml, tenant-3.yaml each contain a partial configuration:

# Set the default rule path here to search for the files.
# if not set, it will look at the current working dir
default-rule-path: /etc/suricata/rules
rule-files:
  - rules1

# You can specify a threshold config file by setting "threshold-file"
# to the path of the threshold config file:
# threshold-file: /etc/suricata/threshold.config

classification-file: /etc/suricata/classification.config
reference-config-file: /etc/suricata/reference.config

# Holds variables that would be used by the engine.
vars:

  # Holds the address group vars that would be passed in a Signature.
  # These would be retrieved during the Signature address parsing stage.
  address-groups:

    HOME_NET: "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]"

    EXTERNAL_NET: "!$HOME_NET"

    ...

  port-groups:

    HTTP_PORTS: "80"

    SHELLCODE_PORTS: "!80"

    ...

8.4.2.1. vlanid

Assign tenants to vlan id’s.

Example of vlan mapping:

mappings:
- vlan-id: 1000
  tenant-id: 1
- vlan-id: 2000
  tenant-id: 2
- vlan-id: 1112
  tenant-id: 3

The mappings can also be modified over the unix socket, see below.

Note: can only be used if ‘vlan.use-for-tracking’ is enabled.

8.4.2.2. device

Assign tenants to devices. A single tenant can be assigned to a device. Multiple devices can have the same tenant.

Example of device mapping:

mappings:
- device: ens5f0
  tenant-id: 1
- device: ens5f1
  tenant-id: 3

The mappings are static and cannot be modified over the unix socket.

Note: Not currently supported for IPS.

Note: support depends on a capture method using the ‘livedev’ API. Currently these are: pcap, AF_PACKET, PF_RING and Netmap.

8.4.3. Per tenant settings

The following settings are per tenant:

  • default-rule-path
  • rule-files
  • classification-file
  • reference-config-file
  • threshold-file
  • address-vars
  • port-vars

8.4.4. Unix Socket

8.4.4.1. Registration

register-tenant <id> <yaml>

Examples:

register-tenant 1 tenant-1.yaml
register-tenant 2 tenant-2.yaml
register-tenant 3 tenant-3.yaml
register-tenant 5 tenant-5.yaml
register-tenant 7 tenant-7.yaml

unregister-tenant <id>

unregister-tenant 2
unregister-tenant 1

8.4.4.2. Unix socket runmode (pcap processing)

The Unix Socket “pcap-file” command can be used to select the tenant to inspect the pcap against:

pcap-file traffic1.pcap /logs1/ 1
pcap-file traffic2.pcap /logs2/ 2
pcap-file traffic3.pcap /logs3/ 3
pcap-file traffic4.pcap /logs5/ 5
pcap-file traffic5.pcap /logs7/ 7

This runs the traffic1.pcap against tenant 1 and it logs into /logs1/, traffic2.pcap against tenant 2 and logs to /logs2/ and so on.

8.4.4.3. Live traffic mode

For live traffic currently only a vlan based multi-tenancy is supported.

The master yaml needs to have the selector set to “vlan”.

8.4.4.4. Registration

Tenants can be mapped to vlan id’s.

register-tenant-handler <tenant id> vlan <vlan id>

register-tenant-handler 1 vlan 1000

unregister-tenant-handler <tenant id> vlan <vlan id>

unregister-tenant-handler 4 vlan 1111
unregister-tenant-handler 1 vlan 1000

The registration of tenant and tenant handlers can be done on a running engine.