Individual skill
pentesting-dns
Testing DNS services (default 53/TCP+UDP, 5353/UDP mDNS) for zone transfers (AXFR), version/banner disclosure, subdomain and reverse-lookup enumeration, open recursion/amplification, DNSSEC and CAA misconfiguration, and Active Directory SRV record discovery during authorized engagements.
internal/tools/skills/data/network-services-pentesting/pentesting-dns/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Observed behavior
- Instructions only
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 1,325
- Repository last updated
- Nov 9, 2026
- License
- Apache-2.0
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- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- penetration-testing Declared skill tag
- network-services Declared skill tag
- dns Declared skill tag
- testing Derived category
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# Pentesting DNS (port 53)
## When to Use
- Default port `53/tcp` and `53/udp` (queries on UDP, zone transfers and large answers on TCP); `5353/udp` for mDNS/zeroconf.
- When `nmap`/banner shows `domain`, e.g. `53/tcp open domain Microsoft DNS 6.1.7601 ... Windows Server 2008 R2 SP1`.
- For mapping an organization's attack surface (subdomains, mail/AD infrastructure) and for finding misconfigured authoritative/recursive servers.
## Quick Enumeration
```bash
# Version banner (works on most BIND servers)
dig version.bind CHAOS TXT @<DNS_IP>
nmap -p53 --script dns-nsid <DNS_IP> # also grabs NSID/version
# Default DNS NSE sweep