# Network & Server Tools

> One page from jmrp.io, published as markdown. Index: https://jmrp.io/llms.txt

Canonical: https://jmrp.io/tools/categories/network/
Language: en
Alternate: https://jmrp.io/es/tools/categories/network/index.md
Updated: 2026-09-03
License: https://jmrp.io/license/
Category: network

Free network tools — an Nginx config generator and an IPv4/IPv6 subnet calculator with VLSM planning and reverse DNS. Both run in your browser.
Build-Date: 2026-09-06

For planning before touching production: generate an Nginx server block with modern TLS and rate limiting to compare against your own, or slice an IPv4/IPv6 range into subnets with VLSM before committing it to router config. Both run locally in your browser.

- [IP / Subnet Calculator](https://jmrp.io/tools/subnet-calculator/): IPv4 and IPv6 subnet calculator with CIDR notation, VLSM planner, range-to-CIDR converter, and reverse DNS. Runs client-side. ([markdown](https://jmrp.io/tools/subnet-calculator/index.md))
- [Nginx Config Generator](https://jmrp.io/tools/nginx-config-generator/): Generate Nginx server blocks with upstream, QUIC/HTTP3, rate limiting, tarpit, OCSP stapling, and modern TLS. Runs client-side. ([markdown](https://jmrp.io/tools/nginx-config-generator/index.md))

## All categories

- [Security Tools](https://jmrp.io/tools/categories/security/) ([markdown](https://jmrp.io/tools/categories/security/index.md))
- [Developer Tools](https://jmrp.io/tools/categories/developer/) ([markdown](https://jmrp.io/tools/categories/developer/index.md))
- [Embedded & Industrial Tools](https://jmrp.io/tools/categories/embedded/) ([markdown](https://jmrp.io/tools/categories/embedded/index.md))
- [MikroTik Tools](https://jmrp.io/tools/categories/mikrotik/) ([markdown](https://jmrp.io/tools/categories/mikrotik/index.md))