Installing and Administering Internet Services

Chapter 3 113
Configuring and Administering the BIND Name Service
Troubleshooting the BIND Name Server
0 Unknown query types
47921 A querys
2054 CNAME querys
8216 SOA querys
35906 PTR querys
10569 MX querys
424 AXFR querys
179263 ANY querys
The first two lines print out the number of seconds that the name server
has been running and the number of seconds since the last restart
caused by a SIGHUP signal. To convert these values to days, divide by
86,400 (the number of seconds in a day).
input packets is the number of datagrams received by the name
server. The datagrams come from the resolver code compiled into the
services and from queries and responses from other name servers.
output packets is the number of datagrams sent by the name server.
These datagrams are responses to resolver queries, responses to queries
from other name servers, and system queries. Because queries to other
name servers may not be answered, there will probably be more output
packets than input packets.
queries is the number of queries received by this name server. Because
the name server can handle datagram and stream connections, there can
be more queries than input packets. The total number of queries is the
sum of all the counts of different query types listed in this statistics
dump, starting with unknown query types.
iqueries is the number of inverse queries. Inverse queries can be used
to map a host address to a domain name, although PTR queries
(discussed below) are the normal method. Some versions of nslookup
send inverse queries when they are starting up.
duplicate queries are retransmitted queries for pending lookups
that the resolver sends to the name server. The name server detects the
duplicate queries and discards them.
responses is the number of response packets that the name server
receives from queries to other name servers.
duplicate responses are response packets from remote name servers
for queries that are no longer pending. The name server retransmits
queries to remote name servers. If the remote server responds to the
original query and responds to the retransmitted query, the local name
server discards the second response as a duplicate.