> network diagnostics toolkit
NTool_
Your network toolkit, all in one place.
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MX Lookup
Find MX records of a domain with priority and mail server diagnostics
$ mx-lookup --domain
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SPF Lookup
Verify the SPF record for email authentication and prevent spoofing
$ spf-lookup --domain
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DKIM Lookup
Check the DKIM record for email digital signatures
$ dkim-lookup --domain --selector
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DMARC Lookup
Analyze the DMARC policy for domain email protection
$ dmarc-lookup --domain
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DMARC Generator
Generate a valid DMARC record with custom policies
$ dmarc-gen --policy
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SMTP Diagnostics
Test SMTP connection, open relay, TLS and response time
$ smtp-diag --server
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Email Header Analyzer
Analyze email headers to trace path and delays
$ header-analyze --input
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BIMI Lookup
Verify the BIMI record for brand logo in emails
$ bimi-lookup --domain
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MTA-STS Lookup
Check the MTA-STS policy for secure SMTP connections
$ mta-sts --domain
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TLS-RPT Lookup
Verify the TLS-RPT record for TLS error reporting in email
$ tlsrpt-lookup --domain
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DNS Lookup
DNS record resolution: A, AAAA, MX, CNAME, TXT, NS, SOA
$ dns-resolve --name
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CNAME Lookup
Resolve the complete CNAME chain of a hostname
$ cname-lookup --host
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Reverse DNS
Reverse PTR resolution from IP address to hostname
$ reverse-dns --ip
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NS Lookup
Find the authoritative nameservers of a domain
$ ns-lookup --domain
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SOA Lookup
Verify the SOA record with serial, refresh and retry
$ soa-lookup --domain
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TXT Lookup
List all TXT records of a domain
$ txt-lookup --domain
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DNS Health Check
Full DNS health check: propagation, consistency and configuration
$ dns-check --domain
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ASN Lookup
Find the Autonomous System Number and provider of an IP
$ asn-lookup --ip
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Subdomain Finder
Discover active subdomains of a target domain
$ subdomain-find --domain
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DNS Propagation
Check global DNS propagation from 20+ worldwide servers
$ dns-prop --domain --type
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SSL Check
Verify SSL/TLS certificates, expiry, grade and certificate chain
$ ssl-check --target
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Blacklist Check
Check IP/domain against 100+ DNSBL and spam blacklists in real time
$ bl-check --target
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Port Scanner
Scan open TCP ports and identify active services
$ port-scan --host
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Open Relay Test
Check if a mail server is an exploitable open relay for spam
$ relay-test --server
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Security Headers
Analyze HTTP security headers: CSP, HSTS, X-Frame, etc.
$ sec-headers --url
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TLS Cipher Test
Verify supported TLS cipher suites and identify weak ones
$ tls-test --host
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Certificate Chain
View and validate the entire SSL certificate chain
$ cert-chain --domain
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CAA Record Lookup
Verify CAA records that authorize CAs to issue certificates
$ caa-lookup --domain
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Ping
ICMP reachability test with latency and packet loss
$ ping --host
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Traceroute
Trace the complete packet path hop by hop
$ traceroute --target
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HTTP Headers
Analyze all HTTP/HTTPS response headers of a site
$ http-headers --url
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IP Geolocation
Geolocation, ISP, ASN and detailed information about an IP
$ ip-lookup --address
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WHOIS Lookup
Domain registration info: owner, expiry, registrar
$ whois --domain
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What Is My IP
Show your public IP with geolocation and ISP
$ my-ip --show
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Speed Test
Test download/upload speed and connection latency
$ speed-test --run
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Domain Health
Full domain health report: DNS, email, web, SSL
$ domain-health --domain
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Subnet Calculator
Calculate subnet, network range, broadcast and available hosts
$ subnet-calc --cidr
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Password Generator
Generate secure passwords with length and complexity options
$ passwd-gen --length --complexity
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Base64 Encode/Decode
Encode and decode strings in Base64 format
$ base64 --encode --input
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URL Encode/Decode
Encode and decode URLs with special characters
$ url-encode --input
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Hash Generator
Generate MD5, SHA1, SHA256 and SHA512 hashes from text or file
$ hash-gen --algo --input
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Regex Tester
Test regular expressions with real-time match highlighting
$ regex-test --pattern --input