DNS Reconnaissance
Challenge Gallery
Quick Reference
| Command | What It Does |
|---|---|
dig example.com |
Query A record (IPv4) |
dig AAAA example.com |
Query IPv6 address |
dig MX example.com |
Query mail servers |
dig NS example.com |
Query nameservers |
dig +short example.com |
Concise output |
dig +trace example.com |
Full resolution chain |
dig @8.8.8.8 example.com |
Query specific DNS server |
dig -x 93.184.216.34 |
Reverse DNS (IP → hostname) |
nslookup example.com |
Simple DNS lookup |
DNS Record Types
| Type | Purpose |
|---|---|
| A | IPv4 address |
| AAAA | IPv6 address |
| CNAME | Alias to another domain |
| MX | Mail server |
| NS | Nameserver delegation |
| TXT | Arbitrary text (SPF, DKIM) |
| SOA | Zone authority info |
| PTR | Reverse lookup (IP → name) |
| DNSKEY | DNSSEC public key |