mithra

README

mithra

Mithra is a network probing tool that samples IP addresses from CIDR ranges and tests their connectivity and HTTP behavior.

It is designed for large-scale IP range validation, service reachability checks, and automated probing of network endpoints.

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Features

• Random sampling of IPs from CIDR ranges.
• Minimum and maximum sample limits per CIDR.
• Probabilistic sampling control.
• TLS connectivity checks with optional SNI.
• Optional HTTP status code validation.
• Per-IP execution timeout.
• Configurable via CLI flags or config file.

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Installation

go install github.com/fmotalleb/mithra@latest

Or build locally:

git clone https://github.com/fmotalleb/mithra.git
cd mithra
go build

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Usage

mithra [flags]

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Flags

Flag	Default	Description
-v, --verbose	false	Enable debug logging
-c, --config	""	Config file path (default: read from stdin)
--cidr	Cloudflare ranges	CIDRs to test against
-t, --timeout	1s	Timeout per IP
--sni	""	SNI hostname
--port	443	Port to test
--status	0	Expected HTTP status code (0 disables HTTP check)
--min-count	1	Minimum IP samples per CIDR
--max-count	30	Maximum IP samples per CIDR
--chance	0.05	Probability of picking each IP
-o, --output	""	Write results to the output file (only success)

Multiple CIDRs can be passed:

mithra --cidr 1.1.1.0/24 --cidr 8.8.8.0/24

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Configuration

Config structure:

cidr:
  - 1.1.1.0/24
  - 8.8.8.0/24

sni: example.com
timeout: 1
port: 443
status_code: 200

sample_min: 5
sample_max: 50
sample_chance: 0.1

Fields:

Field	Description
cidr	CIDR ranges to scan
sni	TLS SNI hostname
timeout	Timeout per IP
port	Port to connect
status_code	Expected HTTP status
sample_min	Minimum samples per CIDR
sample_max	Maximum samples per CIDR
sample_chance	Probability of selecting an IP

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Examples

Probe Cloudflare IPs with HTTP validation:

mithra --sni example.com --status 200

Probe a custom CIDR with higher sampling:

mithra --cidr 10.0.0.0/16 --min-count 20 --max-count 100 --chance 0.2

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Output

• Successful probes are logged at info level.
• Failed probes are logged at debug level.
• Results include IP, status, and execution metadata.

Documentation

Overview

Copyright © 2026 Motalleb Fallahnezhad

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.