added a new page

Author: sushantjrao

articles/operator-nexus/howto-replace-a-terminal-server.md

@@ -1,17 +1,17 @@
 ---
 title: How to replace a terminal server within Nexus Network Fabric
-description: Process of replacing a terminal server
+description: Process of replacing a terminal server within Nexus Network Fabric
 author: sushantjrao 
 ms.author: sushrao
 ms.service: azure-operator-nexus
 ms.topic: how-to
-ms.date: 05/17/2024
+ms.date: 01/24/2024
 ms.custom: template-how-to, devx-track-azurecli
 ---
 
 # Replacing a terminal server
 
-This guide provides a step-by-step process for replacing a Terminal Server (TS) within a network environment. The procedure includes cleaning up the existing TS, removing the TS, installing a new TS, and configuring the Terminal Server.
+This guide provides a step-by-step process for replacing a Terminal Server (TS) within nexus network fabric. The procedure includes cleaning up the existing TS, removing the TS, installing a new TS, and configuring the Terminal Server.
 
 ## Pre-Replacement Cleanup (Customer Action)
 

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

@@ -0,0 +1,78 @@
+---
+title: How to restrict serial port access and set timeout on terminal server
+description: Process of configuring serial port access restrictions and timeout settings on terminal server
+author: sushantjrao 
+ms.author: sushrao
+ms.service: azure-operator-nexus
+ms.topic: how-to
+ms.date: 01/24/2024
+ms.custom: template-how-to, devx-track-azurecli
+---
+
+# How to restrict serial port access to a single session and set a 15-Minute timeout 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 timeout to 15 minutes.
+
+## Prerequisites
+
+- **Terminal Server requirements**: Ensure the Terminal Server is running OS version `24.07.1` or above.  
+  For upgrade instructions, refer to [How to Upgrade Terminal Server OS](howto-upgrade-os-of-terminal-server.md).
+
+
+## Step 1: Set timeout for sessions
+
+Configure the session timeouts for CLI, WebUI, and Serial Port access using the following commands:
+
+```bash
+ogcli update system/cli_session_timeout timeout=15
+ogcli update system/webui_session_timeout timeout=15
+ogcli update system/session_timeout serial_port_timeout=15
+```
+
+## Step 2: Verify timeout settings
+
+Confirm the new timeout settings by running:
+
+```bash
+ogcli get system/session_timeout
+```
+
+```Expected output:
+cli_timeout=15
+serial_port_timeout=15
+webui_timeout=15
+```
+
+## Step 3: Configure single session for serial ports
+
+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
+ogcli get ports | grep -E 'ogcli get port|single_session'
+```
+
+Alternatively, check individual ports:
+
+```bash
+ogcli get port "port01"
+```
+
+```Expected output for each port:
+single_session=true
+```
+
+Repeat the command for other ports as needed (`port02`, `port03`, etc.).