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Author: sushantjrao

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articles/operator-nexus/TOC.yml

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           href: howto-configure-bring-your-own-storage-network-fabric.md
         - name: How to upgrade os of terminal server
           href: howto-upgrade-os-of-terminal-server.md
+        - name: How to restrict serial port access and set timeout on terminal-server
+          href: howto-restrict-serial-port-access-and-set-timeout-on-terminal-server.md           
     - name: Cluster
       expanded: false
       items:

articles/operator-nexus/howto-restrict-serial-port-access-and-set-timeout-on-terminal-server.md

@@ -0,0 +1,80 @@
+---
+title: "Azure Operator Nexus: How to restrict serial port access and set time-out on terminal server"
+description: Process of configuring serial port access restrictions and time-out settings on terminal server
+author: sushantjrao 
+ms.author: sushrao
+ms.service: azure-operator-nexus
+ms.topic: how-to
+ms.date: 02/26/2025
+ms.custom: template-how-to, devx-track-azurecli
+---
+
+# How to restrict serial port access to a single session and set a 15-Minute time-out on a Terminal Server
+
+This guide explains how to configure a Terminal Server to restrict serial port access to a single session and set the default time-out to 15 minutes.
+
+## Prerequisites
+
+The Terminal Server must run OS version 24.11.2 or a later version.<br>  
+For upgrade instructions, refer to [How to Upgrade Terminal Server OS](howto-upgrade-os-of-terminal-server.md).
+
+>[!Note]
+> This guide has been validated with Opengear firmware version 24.11.2, which was upgraded from version 22.06.0, and is supported with Nexus Network Fabric runtime version 5.0.0.
+
+## Step 1: Set time-out for sessions
+
+Configure the session time-outs for CLI, WebUI, and Serial Port access using the following commands:
+
+```bash
+sudo ogcli update system/cli_session_timeout timeout=15
+sudo ogcli update system/webui_session_timeout timeout=15
+sudo ogcli update system/session_timeout serial_port_timeout=15
+```
+
+## Step 2: Verify time-out settings
+
+Confirm the new time-out settings by running:
+
+```bash
+sudo ogcli get system/session_timeout
+```
+
+```Expected output:
+cli_timeout=15
+serial_port_timeout=15
+webui_timeout=15
+```
+
+## Step 3: Configure single serial port session
+
+To restrict each serial port to a single session, execute the following command. 
+
+```bash
+for i in {01..48} ; do
+  echo "### Configuring single_session on port$i ###"
+  ogcli update port port$i single_session=true
+done
+```
+
+>[!Note]
+> This process may take approximately 15 minutes.
+
+## Step 4: Verify single session configuration
+
+Validate the configuration by listing the ports and checking the `single_session` status:
+
+```bash
+sudo ogcli get ports | grep -E 'ogcli get port|single_session'
+```
+
+Alternatively, check individual ports:
+
+```bash
+sudo ogcli get port "port01"
+```
+
+```Expected output for each port:
+single_session=true
+```
+
+Repeat the command for other ports as needed (`port02`, `port03`, etc.).