Hacker Tools

# Basic A record lookup
dig example.com A +short

# Full DNS record info
dig example.com ANY

# Reverse DNS lookup
dig -x 8.8.8.8

# Query specific DNS server
dig @8.8.8.8 example.com

# Trace DNS path
dig +trace example.com

# Full TLS handshake info
openssl s_client -connect example.com:443 \
  -servername example.com

# Check certificate chain
openssl s_client -connect example.com:443 \
  -showcerts

# HTTP/2 test with timing
curl -w "@curl-format.txt" \
  --http2 https://example.com

# Follow redirects with headers
curl -L -I https://example.com

# Trace network path
traceroute example.com

# Test connectivity with timing
ping -c 4 example.com

# Port scan
nmap -p 80,443 example.com

# Check listening ports
netstat -tuln | grep :443

# SSL cipher analysis
nmap --script ssl-enum-ciphers \
  -p 443 example.com

# HTTP security headers
curl -I https://example.com | \
  grep -i "security\|hsts\|csp"

# DNS over HTTPS test
curl -H "accept: application/dns-json" \
  "https://1.1.1.1/dns-query?name=example.com&type=A"

# WHOIS lookup
whois example.com