$ show projectdiscovery/cdncheck

[account ↗] [repo ↗] APPLICATION ★ 989 135 ● active (last update 1 month ago)

── AI DEEP ANALYSIS ──

reviewed by: deepseek/deepseek-v4-flash

cdncheck is a Go library and CLI tool for identifying whether an IP address or domain belongs to a CDN, WAF, or cloud provider. It uses embedded CIDR range data (compiled from ASN, URL, and static CIDR sources) and efficient IP matching via the `bart` radix tree. The library provides a clean `Client` interface with methods like `CheckCDN`, `CheckCloud`, `CheckWAF`, and `CheckDomainWithFallback` that also resolve DNS and check CNAME suffixes. The CLI wraps this with input/output handling, filtering, and JSON output. The codebase is well-structured, with clear separation between core logic, data generation, and CLI runner. It is actively maintained by ProjectDiscovery and used in their security scanning ecosystem.

── METRICS ──

RATING9.2/10

QUALITY8.5/10

MAINTENANCEactive

DRIFTlow

CONTRIBUTORS30

VELOCITY0.86

OPEN ISSUES8

CLOSED ISSUES46

LAST COMMIT1 month ago

── TAGS ──

#cdn-detection #waf-detection #cloud-detection #ip-range-matching #go-library #security-tool #dns-resolution #cdn #cname #detection #technology #cli #api #lib

── GITHUB TOPICS ──

cdn cname detection technology cli api lib

── DEPENDENCY GRAPH ──

github.com/PuerkitoBio/goquery (go) v1.8.1

github.com/gaissmai/bart (go) v0.26.1

github.com/ipinfo/go/v2 (go) v2.9.2

github.com/logrusorgru/aurora (go) v2.0.3+incompatible

github.com/miekg/dns (go) v1.1.62

github.com/pkg/errors (go) v0.9.1

github.com/projectdiscovery/goflags (go) v0.1.74

github.com/projectdiscovery/gologger (go) v1.1.69

github.com/projectdiscovery/mapcidr (go) v1.1.97

github.com/projectdiscovery/retryabledns (go) v1.0.115

github.com/projectdiscovery/utils (go) v0.11.1

github.com/stretchr/testify (go) v1.11.1

github.com/weppos/publicsuffix-go (go) v0.50.3-0.20260104170930-90713dec78f2

gopkg.in/yaml.v3 (go) v3.0.1

aead.dev/minisign (go) v0.2.0

github.com/Masterminds/semver/v3 (go) v3.2.1

github.com/STARRY-S/zip (go) v0.2.3

github.com/VividCortex/ewma (go) v1.2.0

github.com/alecthomas/chroma/v2 (go) v2.14.0

github.com/andybalholm/brotli (go) v1.2.0

github.com/andybalholm/cascadia (go) v1.3.1

github.com/asaskevich/govalidator (go) v0.0.0-20230301143203-a9d515a09cc2

github.com/aymanbagabas/go-osc52/v2 (go) v2.0.1

github.com/aymerick/douceur (go) v0.2.0

github.com/bodgit/plumbing (go) v1.3.0

github.com/bodgit/sevenzip (go) v1.6.1

github.com/bodgit/windows (go) v1.0.1

github.com/charmbracelet/glamour (go) v0.8.0

github.com/charmbracelet/lipgloss (go) v0.13.0

github.com/charmbracelet/x/ansi (go) v0.3.2

github.com/cheggaaa/pb/v3 (go) v3.1.4

github.com/cnf/structhash (go) v0.0.0-20201127153200-e1b16c1ebc08

github.com/davecgh/go-spew (go) v1.1.2-0.20180830191138-d8f796af33cc

github.com/djherbis/times (go) v1.6.0

github.com/dlclark/regexp2 (go) v1.11.5

github.com/dsnet/compress (go) v0.0.2-0.20230904184137-39efe44ab707

github.com/ebitengine/purego (go) v0.10.0

github.com/fatih/color (go) v1.15.0

github.com/go-ole/go-ole (go) v1.2.6

github.com/google/go-github/v30 (go) v30.1.0

github.com/google/go-querystring (go) v1.1.0

github.com/google/shlex (go) v0.0.0-20191202100458-e7afc7fbc510

github.com/google/uuid (go) v1.3.1

github.com/gorilla/css (go) v1.0.1

github.com/hashicorp/golang-lru/v2 (go) v2.0.7

github.com/json-iterator/go (go) v1.1.12

github.com/klauspost/compress (go) v1.18.2

github.com/klauspost/pgzip (go) v1.2.6

github.com/logrusorgru/aurora/v4 (go) v4.0.0

github.com/lucasb-eyer/go-colorful (go) v1.2.0

github.com/lufia/plan9stats (go) v0.0.0-20211012122336-39d0f177ccd0

github.com/mattn/go-colorable (go) v0.1.13

github.com/mattn/go-isatty (go) v0.0.20

github.com/mattn/go-runewidth (go) v0.0.16

github.com/mholt/archives (go) v0.1.5

github.com/microcosm-cc/bluemonday (go) v1.0.27

github.com/mikelolasagasti/xz (go) v1.0.1

github.com/minio/minlz (go) v1.0.1

github.com/minio/selfupdate (go) v0.6.1-0.20230907112617-f11e74f84ca7

github.com/modern-go/concurrent (go) v0.0.0-20180306012644-bacd9c7ef1dd

github.com/modern-go/reflect2 (go) v1.0.2

github.com/muesli/reflow (go) v0.3.0

github.com/muesli/termenv (go) v0.15.3-0.20240618155329-98d742f6907a

github.com/nwaples/rardecode/v2 (go) v2.2.2

github.com/patrickmn/go-cache (go) v2.1.0+incompatible

github.com/pierrec/lz4/v4 (go) v4.1.23

github.com/pmezard/go-difflib (go) v1.0.1-0.20181226105442-5d4384ee4fb2

github.com/power-devops/perfstat (go) v0.0.0-20240221224432-82ca36839d55

github.com/projectdiscovery/blackrock (go) v0.0.1

github.com/projectdiscovery/machineid (go) v0.0.0-20250715113114-c77eb3567582

github.com/rivo/uniseg (go) v0.4.7

github.com/saintfish/chardet (go) v0.0.0-20230101081208-5e3ef4b5456d

github.com/shirou/gopsutil/v4 (go) v4.26.3

github.com/sorairolake/lzip-go (go) v0.3.8

github.com/spf13/afero (go) v1.15.0

github.com/tidwall/gjson (go) v1.18.0

github.com/tidwall/match (go) v1.1.1

github.com/tidwall/pretty (go) v1.2.1

github.com/tklauser/go-sysconf (go) v0.3.16

github.com/tklauser/numcpus (go) v0.11.0

github.com/ulikunitz/xz (go) v0.5.15

github.com/yuin/goldmark (go) v1.7.4

github.com/yuin/goldmark-emoji (go) v1.0.3

github.com/yusufpapurcu/wmi (go) v1.2.4

github.com/zcalusic/sysinfo (go) v1.0.2

go.uber.org/multierr (go) v1.11.0

golang.org/x/crypto (go) v0.46.0

golang.org/x/exp (go) v0.0.0-20250106191152-7588d65b2ba8

golang.org/x/mod (go) v0.30.0

golang.org/x/net (go) v0.48.0

golang.org/x/oauth2 (go) v0.27.0

golang.org/x/sync (go) v0.19.0

golang.org/x/sys (go) v0.41.0

golang.org/x/term (go) v0.38.0

golang.org/x/text (go) v0.32.0

golang.org/x/tools (go) v0.39.0

── FILE BREAKDOWN ──

Files by Type (count)

YAML

Markdown

Shell

JSON

Git Ignore

Dockerfile

Makefile

Other (.mod)

Other (.sum)

Files by Type (size)

JSON

4MB

54KB

YAML

30KB

Other (.sum)

19KB

Markdown

8KB

Other (.mod)

3KB

Shell

907B

Makefile

452B

Dockerfile

349B

Git Ignore

145B

── KEY FINDINGS: REUSABLE CODE ──

The LLM identified 3 files worth highlighting for reuse:

Defines `providerScraper` which uses `gaissmai/bart` (a compressed radix tree) for efficient IP-to-provider matching. The `newProviderScraper` function builds a separate `bart.Table` per provider from CIDR strings, and `Match` performs a lookup. This is a clean, reusable pattern for any IP range classification task.

file: types.go ↗ | tags: #radix-tree #ip-matching #provider-scraper

Implements `Compile` and `fetchInputItem` to build the CIDR dataset from multiple sources: static CIDRs, URLs (with regex extraction and HTML fallback for Azure), and ASN lookups via ipinfo.io. The `getCIDRFromURL` function handles HTML pages by extracting JSON links. This module is reusable for any project that needs to compile IP ranges from heterogeneous sources.

file: generate/input.go ↗ | tags: #cidr-fetching #asn-lookup #url-scraping

Provides `CheckSuffix` (CNAME suffix matching using publicsuffix-go) and `CheckWappalyzer` (technology name matching) for identifying WAF/CDN providers via DNS or application fingerprints. The lazy initialization of `suffixToSource` via `sync.Once` is a good pattern. These methods extend detection beyond IP ranges and are cleanly separated from the core IP matching.

file: other.go ↗ | tags: #cname-matching #wappalyzer-integration #suffix-check

── HISTORY ──

Last analyzed: 2026-07-27 11:38:33.170228

Next check: 2026-09-17 17:26:42.149121