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Cover image for Why VPS Rocks for Quick Deployments: My Story + Build an LLM-over-DNS agent in Under 30 Mins!
Nick K
Nick K

Posted on • Edited on • Originally published at skeptrune.com

Why VPS Rocks for Quick Deployments: My Story + Build an LLM-over-DNS agent in Under 30 Mins!

#webdev #programming #ai #javascript

My most valuable skill as a hacker/entrepreneur? Being confident enough to deploy random stuff that works on my laptop to the actual internet. Sounds simple, but this superpower literally got me into Y-Combinator and helped me raise a seed round!

The Struggle Bus Was Real 🚌

Picture this: teenage me, fresh off a Christmas Raspberry Pi gift, building my very first "real" project. A Twitter weather bot that would read from the API firehose and reply with weather conditions when you @'ed it. I followed a tutorial, got it working locally, and then... complete brain freeze on deployment.

Obviously I should just use my Pi as a server, right? WRONG. My code had more bugs than a summer camping trip, crashing whenever I wasn't around to babysit it. Then I couldn't even SSH back in because our house didn't have a static IP (and Tailscale wasn't a thing yet). It was like having a pet that only worked when you were home 😅

Welcome to PaaS Hell 🔥

Fast forward to building web apps in college. Somehow I completely skipped VPS and went straight to Platform as a Service hell. I'd Google "how do I deploy my create react app" and the top answer was always some third-party service with build steps, managed SSL, and enough complexity to make my head spin.

There was ALWAYS some weird limitation:

  • Memory constraints during build ✋
  • Puppeteer couldn't run because missing apt packages 📦
  • Stuck configuring Docker images (pre-AI era, so no ChatGPT to save me) 🐳

I spent more time fighting deployment than actually building my janky React apps. Not a good look!

My VPS Salvation 🙏

During college I got lucky and met this hacky startup entrepreneur who was hiring. The whole operation seemed barely legitimate, but I took the leap anyway.

Going in, I assumed the "proper" way to deploy was AWS or some other hyperscaler. But this guy? Total VPS maximalist with the most beautifully simple philosophy I'd ever encountered:

Rent a VPS, SSH in, do the same thing you did locally (yarn dev or whatever), throw up a reverse proxy, call it a day.

Watching him deploy like this over and over was like seeing magic. Everything was small, learnable, and confidence-building. That nagging voice in my head saying "I can't build this because I won't be able to deploy it" just... disappeared.

Paying It Forward ⚡

I've become a total evangelist for this approach, but never knew how to write about it entertainingly. Then I saw levelsio's tweet about deploying a DNS server that lets you talk to an LLM, and I knew I had my hook!

Want to see it in action? Try this magic:

dig @llm.skeptrune.com "what is the meaning of life?" TXT +short
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Pretty wild, right? Let's build our own in less than 30 minutes with nothing but a rented server!

The Build: LLM-over-DNS in 30 Minutes ⏰

Step 1: Get Into Your VPS 🔑

After purchasing your VPS (I love Hetzner, but any provider works), you'll get an IP and login creds via email:

ssh root@<your-vps-ip>
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Step 2: Clear the DNS Decks 🧹

Most VPS images come with DNS stuff pre-installed. Let's clean house:

# Check what's running
systemctl list-units --type=service | grep -E 'bind|dns|systemd-resolved'

# Stop the usual suspects
systemctl stop systemd-resolved
systemctl disable systemd-resolved

# Bye bye bind9
apt-get remove --purge bind9 -y
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Step 3: Install Our Tools 🛠️

Just need a couple Python packages:

pip install dnslib requests
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Step 4: The Magic Script ✨

Here's where the fun happens. Create a Python script that listens for DNS queries, treats them as prompts, hits the OpenRouter API, and returns the response as a TXT record:

from dnslib.server import DNSServer, BaseResolver
from dnslib import RR, QTYPE, TXT
import requests
import codecs

OPENROUTER_API_KEY = ""  # Add your OpenRouter API key here
LLM_API_URL = "https://openrouter.ai/api/v1/chat/completions"

class LLMResolver(BaseResolver):
    def resolve(self, request, handler):
        qname = request.q.qname
        qtype = QTYPE[request.q.qtype]
        prompt = str(qname).rstrip('.')

        # Forward prompt to LLM
        try:
            response = requests.post(
                LLM_API_URL,
                headers={
                    "Authorization": f"Bearer {OPENROUTER_API_KEY}",
                    "Content-Type": "application/json"
                },
                json={
                    "model": "openai/gpt-3.5-turbo",
                    "messages": [{"role": "user", "content": prompt}]
                },
                timeout=10
            )
            response.raise_for_status()
            raw_answer = response.json()["choices"][0]["message"]["content"]
        except Exception as e:
            raw_answer = f"Error: {str(e)}"

        try:
            answer = codecs.decode(raw_answer.encode('utf-8'), 'unicode_escape')
        except Exception:
            answer = raw_answer.replace('\\010', '\n').replace('\\n', '\n')

        reply = request.reply()
        if qtype == "TXT":
            # Split long responses into chunks (DNS has limits!)
            chunk_size = 200
            if len(answer) > chunk_size:
                chunks = [answer[i:i+chunk_size] for i in range(0, len(answer), chunk_size)]
                for i, chunk in enumerate(chunks):
                    reply.add_answer(RR(qname, QTYPE.TXT, rdata=TXT(f"[{i+1}/{len(chunks)}] {chunk}")))
            else:
                reply.add_answer(RR(qname, QTYPE.TXT, rdata=TXT(answer)))
        return reply

if __name__ == "__main__":
    resolver = LLMResolver()
    server = DNSServer(resolver, port=53, address="0.0.0.0")
    server.start_thread()
    import time
    while True:
        time.sleep(1)
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Save this as llm_dns.py. Don't forget to grab an OpenRouter API key and paste it in!

Quick Note: This is totally a proof-of-concept. For real production stuff, you'd want proper process management, logging, rate limiting, and definitely not storing API keys in plaintext 😬

Step 5: Fire It Up! 🔥

Start your DNS-LLM hybrid (needs root for port 53):

sudo python3 llm_dns.py
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Step 6: Test Your Creation 🧪

From another machine, send a DNS query and watch the magic:

dig @<your-vps-ip> "what is the meaning of life" TXT +short
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You should see the LLM's response come back through DNS. How cool is that?!

When Things Go Wrong 🚨

Common hiccups:

  • Permission denied: Remember that sudo for port 53!
  • Connection timeout: Check your firewall settings
  • API errors: Double-check that OpenRouter key
  • No response: Make sure systemd-resolved is actually disabled

Lock It Down (Optional but Smart) 🔒

Want to add some basic security? UFW to the rescue:

ufw allow ssh
ufw allow 53
ufw enable
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This keeps SSH open (don't lock yourself out!) and allows DNS queries while blocking everything else.

The VPS Philosophy 🎯

This whole exercise demonstrates why I'm such a VPS evangelist. No complex infrastructure, no weird platform limitations, no mysterious build failures. Just:

  1. SSH into a server
  2. Install what you need
  3. Run your code
  4. It works!

That's it. That's the tweet.

Sure, you might need more sophisticated setups for massive scale, but for 99% of side projects and early-stage startups? VPS all the way. The confidence boost alone is worth it.

Resources 📚

Now go forth and deploy weird stuff to the internet! Your future entrepreneurial self will thank you 🚀

What's the weirdest thing you've deployed to a VPS? Drop it in the comments!

Top comments (3)

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anik_sikder_313 profile image
Anik Sikder •

This is the kind of post that makes you want to spin up a VPS just for the thrill of it.
As a full-stack dev working with Django, FastAPI, and React, I’ve seen how deployment anxiety can kill momentum. Your “just deploy it” mindset is a superpower, and the DNS+LLM trick? That’s the kind of weird, delightful hack that reminds us why we build in the first place.
I often tell junior devs in my Bangla-speaking community: কোড লেখা যতটা গুরুত্বপূর্ণ, সেটা চালু করে দেখানো তার চেয়েও বেশি! (Writing code is important, but showing it live is even more powerful.)

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reynaldi profile image
reynaldi •

lol this is so silly i like it, what's next llm over tcp? 😭

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parag_nandy_roy profile image
Parag Nandy Roy •

pure hacker energy and a perfect case for VPS freedom...