Cloud and Systems
Product Updates

What Is a VNF (Virtual Network Function) and How to Use It on Jotelulu

Virtual Network Functions (VNF) at Jotelulu

Surely more than once you’ve found yourself in this situation:
You need to deploy a Fortinet, a SonicWall or a WatchGuard in a cloud environment… and things get complicated. Manual configuration, NAT issues, lack of network flexibility, hours lost setting up something that should be simple.

At Jotelulu, we’ve heard these complaints from many of you. And we found the solution by implementing official images from the main security vendors directly on our platform. Now, deploying a VNF is no longer an endless project but an automated, guided process ready in minutes.


What a VNF is and why it matters

A VNF (Virtual Network Function) is simply the software version of traditional physical network appliances.
What used to be a firewall with fans and a rack is now a virtual machine ready to boot in the cloud.

This changes the game because:

  • Flexibility: deploy wherever you want, whenever you want.
  • Agility: go from weeks of waiting to minutes.
  • Control: integrate security and connectivity in the same platform where you manage your servers.

Real use cases

  • Virtual firewall to segment critical environments.
  • VPN concentrator for remote access.
  • Virtual load balancer for applications requiring high availability.
  • IDS/IPS to reinforce security without relying on physical hardware.

What we’ve implemented at Jotelulu

In addition to official vendor images (Fortinet, SonicWall, WatchGuard, etc.), we have added new capabilities to the platform that make all of this possible:

Layer 2 (L2) Networks

Imagine having a virtual switch in the cloud. That’s what L2 networks are: traffic based on MAC addresses, without predefined network services (IP, gateway or DNS).

  • They allow you to replicate complex topologies, just like in a physical data center.
  • You can configure an IP during deployment to prepare remote access from your own VNF (firewall, router, etc.).
  • If you don’t configure a gateway, that interface will not have Internet access: control is 100% yours.

L2 means freedom and control. You decide how to configure the network; we provide the foundation to do it.

Shared Public IP

When deploying a VNF, you need more than internal connectivity: you need to expose it to the world. That’s where Shared Public IPs come in.

  • They are public IPs dedicated exclusively to VNFs.
  • They connect directly to the server with no NAT in between.
  • Since there is no NAT, security depends entirely on your VNF: configure it properly, filter access and block anything that shouldn’t enter.

A Shared IP is raw power: direct access to the Internet with no intermediaries. You set the firewall; you’re in control.

What this means for you, partner

  • You can offer your clients firewalls, VPNs and load balancers from leading vendors without deployment complications.
  • You reduce costs and time: no need to buy hardware or perform physical installations.
  • You gain flexibility: design cloud network architectures with the same freedom as on-prem.
  • You position yourself as a complete provider, able to deliver servers, security and connectivity from a single panel.

In summary:

VNFs at Jotelulu are not just another feature. They are the missing piece so that partners like you can deploy complete network and security infrastructures in minutes, with the tools you already know (Fortinet, SonicWall, WatchGuard) but with the agility of the cloud.

Jose Pastor
October 17, 2025