> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/bbo-gateway-installation-manual/quick-installation/on-site-requirements.md).

# On-site requirements

## Place of installation <a href="#toc150353540" id="toc150353540"></a>

BBO gateway requires one AC power socket and one Ethernet socket.

The power supplies for all types of BBO gateways can work for AC voltage range from 90\~264 V, 47\~63 Hz and have 1.5 m cable.

An Ethernet 2m cable is delivered with a set.

The module can be installed in any position. The environmental conditions are presented in chapter [Specifications](/bbo-gateway-installation-manual/specifications.md).

## Network requirements <a href="#toc150353541" id="toc150353541"></a>

BBO gateway uses the ports shown in the table below. If any of the servers are behind a firewall, the ports stated must be opened for the unit to operate correctly.

<table data-header-hidden><thead><tr><th width="111"></th><th></th><th width="97"></th><th width="81"></th><th width="88"></th><th width="79"></th><th></th></tr></thead><tbody><tr><td><p>Protocol</p><p>Type</p><p>Port</p><p>Used for</p></td><td><p>DHCP</p><p>UDP</p><p>67/68</p></td><td><p>DNS</p><p>UDP</p><p>53</p></td><td><p>HTTP</p><p>TCP</p><p>80</p><p>B3 server</p></td><td><p>HTTPS</p><p>TCP</p><p>port 443</p></td><td><p>SNTP</p><p>UDP</p><p>port 123</p></td><td><p>UDP</p><p>port 30303</p><p>Discovery</p></td></tr><tr><td>BBO up to v.2.24</td><td><p>DHCP /</p><p>static IP</p></td><td>Optional</td><td>Yes</td><td>No</td><td>No</td><td>Yes</td></tr><tr><td>BBO v.2.26 and higher</td><td><p>DHCP /</p><p>static IP</p></td><td>Optional</td><td>Yes</td><td>No</td><td>Yes</td><td>Yes</td></tr></tbody></table>

TCP port 80 is used for communication with Boomerang server.

UDP port 123 is used for communication with SNTP (real time) server. BBO will not send measurements or will send them with incorrect time stamps if it cannot access SNTP server.

UDP port 30303 is used by the Microchip Ethernet Discoverer tool used to detect BBO in the network as described in [BBO setup](/bbo-gateway-installation-manual/quick-installation/bbo-setup.md#ref150261023).


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