> For the complete documentation index, see [llms.txt](https://dgtnetwork.gitbook.io/dgt-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dgtnetwork.gitbook.io/dgt-docs/6.-administrator-guide/6.2-dgt-core-single-node-setup/6.2.3-nodes-port-configuration.md).

# 6.2.3 Nodes Port Configuration

As a result of installing the node in given containers, several services are launched, the ports of which are presented in the table below. Open ports can be checked with the `sudo ss -ltn` command.

<figure><img src="https://3210145376-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSvanFNAf6Jf8kwvqcdRQ%2Fuploads%2FAHZT5BYhuKLRdQBQTQo0%2Fimage.png?alt=media&amp;token=84488990-9301-40c3-912b-3956fbfddc85" alt=""><figcaption><p><em>Figure 114 Opened ports after the dgt node building procedure</em></p></figcaption></figure>

<table data-header-hidden data-full-width="false"><thead><tr><th width="77.25"></th><th width="154"></th><th width="298"></th><th></th></tr></thead><tbody><tr><td><p> </p><p>#</p></td><td>TCP/IP Port</td><td>Service</td><td>External Usage</td></tr><tr><td>1</td><td>22</td><td>SSH service, required for remote access to the server</td><td>Required for remote interaction with the node</td></tr><tr><td>2</td><td>4104</td><td>The service of the main component – the validator and interaction with the transaction processor (including support for internal rest-API)</td><td>Must be open if the dashboard is located on a different physical machine</td></tr><tr><td>3</td><td>5051</td><td>Port for other components to interact with the consensus service (for Inner net)</td><td> </td></tr><tr><td>4</td><td>8003</td><td>Rest-Api Dashboard</td><td>Must be opened if the service is located on a separate server or outside the Inner-net network</td></tr><tr><td>5</td><td>8101</td><td>Node interaction</td><td>Must be open for interacting with other nodes</td></tr><tr><td>6</td><td>8108</td><td>Node interaction</td><td>Must be open if the node will accept external requests to execute transactions</td></tr></tbody></table>

DGT nodes can use various network ports for communication, which are configured through environment variables set up by the `upDgtCluster.sh` script in the DGT director (for example, /DGT-Matagami/CORE):

\-        API=8108 (API service)

\-        COMP=4104 (supporting transaction families)

\-        NET=8101 (supporting the network)

\-        CONS=5051 (consensus service)