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Mock Network Config Generator

Used by developers, writers, and creators worldwide.

The mock network config generator produces realistic, test-safe network configuration blocks for hosts, interfaces, firewall rules, and VPN peers — without any manual fabrication. Network engineers, backend developers, and QA teams use it when they need plausible-looking config data fast: valid IP addresses, CIDR notation, MAC addresses, gateway fields, and protocol-specific flags, all structured consistently across every block. Set the count and pick a config type. Host and interface outputs include subnet masks and MAC addresses; firewall rules carry protocol, port, and action fields; VPN peers include endpoint and key-format entries. The IPs are randomly generated and map to no live infrastructure, making the output safe for staging environments, parser testing, and demo databases.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Set the Count field to the number of config blocks you need for your test or documentation task.
  2. Open the Config Type dropdown and select the format that matches your use case: host, interface, firewall rule, or VPN peer.
  3. Click Generate to produce all config blocks at once in the output panel below.
  4. Review the output to confirm the field structure matches your expected schema, then copy individual blocks or the full output.
  5. Paste the configs into your test fixture, documentation template, or seed script as needed.

Use Cases

  • •Seeding a CMDB or network inventory demo with realistic host and subnet records
  • •Unit-testing a firewall rule parser against varied protocol, port, and action combinations
  • •Populating Ansible inventory files with dummy host configs before real devices are provisioned
  • •Building VPN peer entries for integration tests in a Terraform or Pulumi staging environment
  • •Creating onboarding lab configs for new network engineers without exposing live topology

Tips

  • →Generate firewall rule configs in batches of 20+ to get enough field variation for thorough parser edge-case testing.
  • →If you need strictly RFC 1918 private addresses, filter the output for 10.x, 172.16-31.x, or 192.168.x ranges before use.
  • →Combine host and interface outputs to build a two-layer inventory: hosts as the device layer and interfaces as the port layer.
  • →For VPN peer configs, generate at least two sets and pair them manually to simulate realistic tunnel endpoint relationships.
  • →Use the output as seed data in factories or fixtures files so your test suite always has deterministic-looking but varied network data.
  • →When demoing a network UI, generate configs across all types and mix them in your demo dataset to show how the interface handles diverse record formats.

FAQ

are the generated IP addresses safe to use in test environments

Yes — the IPs are randomly constructed and do not correspond to any live infrastructure. That said, some may fall outside RFC 1918 private ranges (10.x, 172.16–31.x, 192.168.x), so if your test environment enforces private-only addressing, scan the output before use.

what fields do firewall rule and vpn peer configs actually include

Firewall rule blocks include protocol, source address, destination address, port, and action fields — enough to test a parser or validate regex patterns against realistic config syntax. VPN peer entries carry endpoint address, allowed IPs, and key-format fields; MAC addresses are omitted from both types since they are not relevant to those formats.

can I use the output directly in GNS3 or as real device config

Not directly — simulation platforms like GNS3 or EVE-NG require their own vendor-specific syntax, and real devices need verified addressing. Treat the output as realistic source material to adapt rather than a drop-in config file.