dnsx: add page (#12618)

pages/common/dnsx.md

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+# dnsx
+
+> A fast and multi-purpose DNS toolkit to run multiple DNS queries.
+> Note: input to `dnsx` needs to be passed through `stdin` (pipe `|`) in some cases.
+> See also: `dig`, `dog`, `dnstracer`.
+> More information: <https://github.com/projectdiscovery/dnsx>.
+
+- Query the A record of a (sub)domain and show [re]sponse received:
+
+`echo {{example.com}} | dnsx -a -re`
+
+- Query all the DNS records (A,AAAA,CNAME,NS,TXT,SRV,PTR,MX,SOA,AXFR,CAA):
+
+`dnsx -recon -re <<< {{example.com}}`
+
+- Query a specific type of DNS record:
+
+`echo {{example.com}} | dnsx -re -{{a|aaaa|cname|ns|txt|srv|ptr|mx|soa|any|axfr|caa}}`
+
+- Output [r]esponse [o]nly (do not show the queried domain or subdomain):
+
+`echo {{example.com}} | dnsx -ro`
+
+- Display raw response of a query, specifying [r]esolvers to use and retry attempts for failures:
+
+`echo {{example.com}} | dnsx -{{debug|raw}} -resolver {{1.1.1.1,8.8.8.8,...}} -retry {{number}}`
+
+- Brute force DNS records using a placeholder:
+
+`dnsx -domain {{FUZZ.example.com}} -wordlist {{path/to/wordlist.txt}} -re`
+
+- Brute force DNS records from a list of [d]omains and wordlists, appending [o]utput to a file wih [n]o [c]olor codes:
+
+`dnsx -domain {{path/to/domain.txt}} -wordlist {{path/to/wordlist.txt}} -re -output {{path/to/output.txt}} -no-color`
+
+- Extract `CNAME` records for the given list of subdomains, with [r]ate [l]imiting DNS queries per second:
+
+`subfinder -silent -d {{example.com}} | dnsx -cname -re -rl {{number}}`