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brew install cidrmergelocal Homebrew formula metadata
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Install cidrmerge with Homebrew
CIDR merging with network exclusion. Version 1.5.3 via Homebrew; verified from local package data.
install
Additional install commands
overview
Package summary
CIDR merging with network exclusion
Project links
Commands and aliases
- cidrmerge
history
Project history and usage
CIDRMerge is a C command-line tool and library for merging CIDR networks while applying whitelist-based network exclusion.
Project history
The SourceForge project was created in August 2005 by Daniele Depetrini. The homepage describes a CIDR merge implementation whose output is summarized as small as possible, with an optimization library, a command-line program, and conversion scripts for netmask and CIDR formats.
Adoption history
The homepage says CIDRMerge has been widely used for blacklist merge and optimization and notes use by big ISPs. SourceForge file history shows releases from 1.1.0 in August 2005 through 1.5.3 in July 2008, and Homebrew still packages 1.5.3.
How it is used
Users feed CIDR-formatted lines on standard input, optionally pass a whitelist file, and receive merged or whitelist-filtered CIDR output. The homepage calls out blacklist optimization, RBLDNS workflows, ACL or routing-table reduction, and network-complement computation.
Why package nerds care
CIDRMerge is old-school package-nerd material: a small C utility, CVS-hosted on SourceForge, still useful enough to be bottled by Homebrew years after its last upstream release. It reflects the practical sysadmin lineage of packaging compact network-list tools for spam filtering, firewalling, and route-table maintenance.
Timeline
- 2005: SourceForge project created.
- 2005: cidrmerge-1.1.0 released.
- 2005: cidrmerge-1.5.0 and 1.5.1 released.
- 2008: cidrmerge-1.5.3 released.
- 2026: Homebrew formula still packages cidrmerge-1.5.3.
Related projects
- The homepage explicitly mentions RBLDNS and Michael Tokarev's qsort code; related package-manager peers in this batch include cidr and cidr2range.
Sources
security posture
Risk level: blue
broad file, network, media, or database tool signal.
Risk classifier
blue risk · medium confidence · tool
Why
- broad file, network, media, or database tool signal
Signals
- text:network
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
cidrmerge | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version1.5.3
manager updated
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:cidrmerge |
|---|---|
| Version | 1.5.3 |
| Package manager | Homebrew |
| Homepage | https://cidrmerge.sourceforge.net/ |
| Bottle | not recorded |
| Service | none declared |
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- pkg.so package database
- pkgdb category and tag curation