dane_query_data - Linux
Overview
dane_query_data is a command-line utility that allows for the retrieval of Domain Name System (DNS) Security (DNSSEC) Authenticated Data (AD) from a specified domain. Primarily used within the realm of DNSSEC, this tool aids in the validation of DNS records and the verification of the integrity of DNS responses.
Syntax
dane_query_data [options] <domain>
Options/Flags
- -a, –algorithm
: Specify the algorithm to use for the query (default: TLSA). Use "list" to list available algorithms. - -q, –qname
: Query a specific record type within the domain (e.g., _tcp.example.com). - -p, –port
: Specify the port for the query (default: 53). - -s, –server
: Specify a specific DNS server to query (default: system resolver). - -t, –type
: Specify the record type to query for (default: TLSA). - -v, –verbose: Enable verbose output, providing additional details about the query process.
- -h, –help: Display help information and usage syntax.
Examples
- Query the default TLSA record for the domain "example.com":
dane_query_data example.com
- Query a specific TLSA record for the service "_tcp" in the domain "example.com":
dane_query_data -q _tcp.example.com example.com
- Use a specific DNS server for the query:
dane_query_data -s 8.8.8.8 example.com
Common Issues
- Query fails: Ensure that the domain is properly configured with DNSSEC and that the queried record type exists. Verify the DNS server settings and firewall rules.
- Unexpected output: Examine the verbose output (-v option) for more information about the query process. Check the algorithm and record type specified.
Integration
dane_query_data can be used in conjunction with other tools like openssl and dig for advanced DNSSEC validation tasks. For example, to verify a TLS certificate using a TLSA record:
dane_query_data example.com | openssl x509 -inform DER -noout -text | grep "Public Key Algorithm:"
Related Commands
- dig, host, nslookup: Other DNS query tools.
- openssl: Used for handling and validating cryptographic operations.