Installing and Administering Internet Services

Chapter 3 151
Configuring and Administering the BIND Name Service
Troubleshooting the BIND Name Server
martian responses are responses from unexpected addresses. The
name server keeps track of how long it takes for a remote name server to
respond. If the remote name server is a multi-homed host, a query to one
of the addresses may result in a response from another of its addresses.
If the local server does not know about this other address, the response is
counted as a martian response.
unknown query types are queries for data types unknown to this server.
A queries are queries for the host address for a domain name. The
gethostbyname library routine generates these address queries.
CNAME queries are queries for the canonical name for a domain name.
Some versions of sendmail query for CNAME records during name
canonicalization from $[ $] tokens in
/var/adm/sendmail/sendmail.cf.
SOA queries are queries for the start of authority records. These queries
are most often made by secondary servers over a stream connection to
check if their domain data is current.
PTR queries are queries for the domain name for a host address. The
gethostbyaddr library routine generates these queries.
MX queries are mail exchanger queries made by sendmail during the
delivery of electronic mail.
AXFR queries is the number of zone transfers done by secondary
servers. A secondary server first makes an SOA query and will follow that
with an AXFR query if new domain data should be transferred.
ANY queries are queries for any data associated with the domain name.
Some versions of sendmail make queries for ANY data during name
canonicalization from $[ $] tokens in
/var/adm/sendmail/sendmail.cf.