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• Configuring the DHCP Server

• L2 on board switches

• Setting up the iptables

• Process Monitors

• Configuring MultiLan interfaces and creating bridges

• Creating multiple VLans for isolating/securing the traffic across interfaces

High Level Architecture

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Figure 1 - High level architecture of Utopia module

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As described in the previous section Utopia is launched and initialised through a set of shell scripts. This section details the scripts and the initialisation sequence.

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Figure 2 - Utopia Initialization Sequence Diagram

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Syscfg_create executable creates shared memory with user configuration data (/nvram/syscfg.db). This is present in the code base at the location /ccsp/utopia/source/syscfg

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Apply_system_defaults executable reads the data from system_defaults file (path: /etc/utopia/system_defaults) and compares with syscfg.db, in case of any data is missing in syscfg, those defaults are written in to shared memory. On start of any module, data is read from the shared memory during initialization.

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Gw_prov_utopia exe calls Init script. Init script executes all executables present in /etc/utopia/registration.d/ directory. 10_firewall exe is responsible for firewall events and it registers for sysevent callback with service name as firewall. Handler script is firewall_log_handle.sh. If any firewall event occurs sysevent is triggered with firewall-restart event name.

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Firewall Initialization Process

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