rmc

Section: Domain Debug Tools Manual (1)
Updated: May 17 1993
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NAME

rmc - check reverse mapping information

SYNOPSYS

rmc [ msglevel ]

DESCRIPTION

Rmc (reverse mapping check) analyzes the reverse mappings for hosts according to the A and PTR RRs contained in zone files. This command finds hosts that don't have the reverse mapping defined in a in-addr.arpa zone and vice-versa.

If msglevel is specified, only those messages belonging to level msglevel are displayed. Default is level 4.

MESSAGES


No <address> PTR RR found for <name>         (Warning 3)

This means that no PTR RRs were found pointing the IP address of name.

No <name> A RR found with <address>          (Warning 3)

This means that there is a PTR RR to name with the reverse
mapping of address but doesn't exist any A RR that links name to address.

EXAMPLES


$ cat ul.pt 76.67.192.in-addr.arpa | rmc
 ### UL.PT. ###
     No 80.221.68.192.in-addr.arpa PTR RR found for gtfcl.fc.ul.pt.
     No 20.221.68.192.in-addr.arpa PTR RR found for ptgbox.fc.ul.pt.
     No 1.221.68.192.in-addr.arpa PTR RR found for ptearn.fc.ul.pt.
     No 2.221.68.192.in-addr.arpa PTR RR found for fcvax1.fc.ul.pt.

 ### 76.67.192.IN-ADDR.ARPA. ###
     No colombo.puug.pt. A RR found with 192.67.76.4

The first four messages may have been caused by the fact that 221.68.192.in-addr.arpa. hasn't been analyzed, so those PTR RRs weren't found.

The last message shows that there is a PTR RR linking 4.76.67.192.in-addr.arpa to colombo.puug.pt, but there is no corresponding A RR.

AUTHORS

Jorge Frazao <frazao@puug.pt>

Artur Romao <artur@dns.pt>

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rmc