Create OPNsense firewall and NAT rules from Telegram with AI
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 64 nodes and runs when someone submits an n8n form (“Add allowed Telegram IDs”) (plus 2 other triggers). Along the way it connects Telegram and OpenAI Chat Model.
How it runs
Trigger: When someone submits an n8n form (“Add allowed Telegram IDs”) (plus 2 other triggers).
- Ensure Table Exists (Data table): create (table)
- Parse Delete IDs (Code): runs custom JavaScript code
- Set OPNsense host (Edit Fields (Set)): sets 1 field: opnsense_host
- Parse Add IDs (Code): runs custom JavaScript code
- Delete Allowed Users (Data table): delete rows
- Lookup In Allowlist (Data table): get
- Upsert Allowed Users (Data table): create or update
- Check Deleted Rows (If): checks a condition and branches into true / false
- Check Allowlist Status (If): checks a condition and branches into true / false
- Add IDs Success (n8n Form): shows the next form page
…plus 42 more steps. See the full node list below.
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in AI Request Classifier (v1.9), AI NAT Interpreter (v1.9), AI Firewall Interpreter (v1.9)…: replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) AI Request Classifier (v1.9), AI NAT Interpreter (v1.9), AI Firewall Interpreter (v1.9), AI Security Audit (v1.9) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (14)
- If
n8n-nodes-base.if - Code
n8n-nodes-base.code - Telegram
n8n-nodes-base.telegram - HTTP Request
n8n-nodes-base.httpRequest - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Switch
n8n-nodes-base.switch - Data table
n8n-nodes-base.dataTable - n8n Form
n8n-nodes-base.form - n8n Form Trigger
n8n-nodes-base.formTrigger - Edit Fields (Set)
n8n-nodes-base.set - Telegram Trigger
n8n-nodes-base.telegramTrigger - No Operation, do nothing
n8n-nodes-base.noOp
From the author
Quick overview Create OPNsense firewall and destination NAT rules directly from Telegram using natural-language requests and AI-assisted rule interpretation. This workflow adds a controlled approval layer, allowing users to review proposed changes before…