chore: remove mentions of specific proxy

content/nginx-one/connect-instances/connect-using-squid.md → content/nginx-one/connect-instances/connect-using-forward-proxy.md

@@ -1,67 +1,27 @@
 ---
-title: Prepare - Set up Squid as a proxy
+title: Prepare - Set up an explicit forward proxy
 toc: true
 weight: 250
 nd-docs: DOCS-000
 ---
 
-NGINX Agent can be configured to connect to NGINX One using a [Squid proxy](https://www.squid-cache.org/). This is useful in environments where direct internet access is restricted or monitored.
+NGINX Agent can be configured to connect to NGINX One using an explicit forward
+proxy. This is useful in environments where direct internet access is restricted or monitored.
 
 ## Before you start
 
 Ensure you have the following:
 
-- [Squid proxy server set up and running](https://wiki.squid-cache.org/SquidFaq/InstallingSquid)
+- An explicit forward proxy server installed and configured in your network.
 - [NGINX Agent is installed]({{< ref "nginx-one/agent/install-upgrade/" >}})
 - Access to the [NGINX One console]({{< ref "/nginx-one/getting-started.md#before-you-begin" >}}).
 
-## Configure Squid
 
-Follow the steps below to configure Squid with basic authentication.
-
-1. Open the Squid configuration file with your favorite text editor (you might need superuser privileges):
-
-   ```sh
-   vi /etc/squid/squid.conf
-   ```
-
-1. Add the following lines to configure the proxy settings:
-
-   ```conf
-   # Standard HTTP port for the proxy.
-   http_port myproxy.example.com:3128
-
-   # Define an ACL for allowing access from the agent's IP address
-   acl agent_ip src <AGENT_IP_ADDRESS>
-
-   # Allow the agent to connect to NGINX One Console
-   acl mgmt_server dstdomain agent.connect.nginx.com
-
-   # Allow HTTPS traffic (port 443 is default for HTTPS)
-   acl ssl_ports port 443
-
-   # HTTP access rules (allow the agent to access the destination server through the proxy)
-   http_access allow agent_ip mgmt_server ssl_ports
-
-   # Deny all other traffic by default (best practice)
-   http_access deny all
-   ```
-
-
-1. Save the changes and exit the text editor.
-1. Restart the Squid service to apply the changes:
-
-   ```sh
-   sudo systemctl reload squid
-   ```
-
----
-
-## NGINX Agent Proxy configuration
+## NGINX Agent configuration for proxy usage
 
 1. Open a secure connection to your instance using SSH and log in.
 1. Open the NGINX Agent configuration file (/etc/nginx-agent/nginx-agent.conf) with a text editor. To edit this file you need superuser privileges.
-1. Add or modify the `proxy` section to include the Squid proxy URL and timeout settings:
+1. Add or modify the `proxy` section to include the proxy URL and timeout settings:
 
    ```conf
    server:
@@ -99,7 +59,7 @@ To configure NGINX Agent in a containerized environment:
 
 ## NGINX Agent proxy authentication
 
-If your Squid proxy requires authentication, you can specify the username and password in the `proxy` section of the `agent.conf` file:
+If your forward proxy requires authentication, you can specify the username and password in the `proxy` section of the `agent.conf` file:
 
 1. Open a secure connection to your instance using SSH and log in.
 1. Add or modify the `proxy` section of the NGINX Agent configuration file (/etc/nginx-agent/nginx-agent.conf) to include the authentication details:
@@ -141,32 +101,24 @@ To set proxy authentication in a containerized environment:
       -d private-registry.nginx.com/nginx-plus/agentv3:latest
    ```
 
-## Validate connectivity between NGINX Agent, Squid, and NGINX One Console
+## Validate connectivity between the components
 
-To test the connectivity between NGINX Agent, Squid, and NGINX One Console, you can use the `curl` command with the proxy settings.
+To test the connectivity between NGINX Agent, your proxy, and NGINX One Console, you can use the `curl` command with the proxy settings.
 
 1. Open a secure connection to your instance using SSH and log in.
 1. Run the following `curl` command to test the connection:
    ```sh
    curl -x http://proxy.example.com:3128 -U your_user:your_password https://agent.connect.nginx.com/api/v1/agents
    ```
 
-   - Replace `proxy.example.com:3128` with your Squid proxy address and port.
-   - Replace `your_user` and `your_password` with the credentials you set up for Squid in the previous steps.
+   - Replace `proxy.example.com:3128` with your proxy address and port.
+   - Replace `your_user` and `your_password` with the credentials you set up for proxy in the previous steps.
 
 To test the configuration from a containerized environment, run the following command from within the container:
 
    ```sh
    curl -x http://host.docker.internal:3128 -U your_user:your_password https://agent.connect.nginx.com/api/v1/agents
    ```
 
-   - Replace `your_user` and `your_password` with the credentials you set up for Squid in the previous steps.
-
-## Troubleshooting
-
-1. Find the configuration and log files:
-
-   - Run `squid -v | grep "configure options"`
-   - Configuration directory should look like `--sysconfdir=/etc/squid'`
-   - Log directory should look like `--sysconfdir=/var/log'`
+   - Replace `your_user` and `your_password` with the credentials you set up for proxy in the previous steps.