WALKER(1) User Contributed Perl Documentation WALKER(1)NAMEwalker - Retrieve a DNS zone using NXT/NSEC traversal
SYNOPSISwalker [-y] [-n] [-d] [-x] [ @nameserver ] zone [ startname ]
DESCRIPTIONwalker retrieves a DNS zone from the default or supplied name server
and prints each record to the standard output. AXFR is not used,
instead the DNSSEC NXT/NSEC record chain is traversed. The zone must
use DNSSEC. The output should conform to the standard DNS master file
format (but see BUGS). Optionally, walker can also verify DNSSEC sig‐
natures on the RRsets within the zone.
OPTIONS-y Additionally perform verification on each RRset within the zone and
print result of verification (in a zone file comment). This also
turn on EDNS.0 and set the DNSSEC flag in queries.
-n When querying for records, ask the nameserver non-recursively,
instead of going through the full resolver logic. This parameter
is useful when you know that the default name server (or the sup‐
plied specific nameserver) can respond correctly, which it typi‐
cally only would if it is responsible for the zone.
The original motivation for the -n parameter was to improve speed
when asking parents for NS records on delegated zones, which would
make the server recursively ask the child servers.
-d Enable debugging in the resolver (this will print all DNS packets,
just like dig).
-x Enable the EDNS.0 DNSSEC flag for SIG/RRSIG queries. Not effective
if -y is used. This is needed for some servers to return SIG/RRSIG
at all.
@nameserver
Query nameserver instead of the default nameserver.
zone
Name of the zone to retrieve master file for. For example, "com".
startname
Optional name to start the zone walk at. The default is to start
walking from the start. This option is useful if the tool failed
or was intterupted in the middle of a large zone.
AUTHOR
Simon Josefsson <simon@josefsson.org>
BUGS
CNAME, CERT and/or SRV RRs is known to cause perl warnings during veri‐
fications with some versions of Net::DNS and Net::DNS::SEC. The cause
is belived to be in Perl, Net::DNS or Net::DNS::SEC. The reader is
encouraged to track down and fix these bugs.
SEE ALSOperl(1), axfr, perldig, Net::DNS, Net::DNS::SEC, resolv.conf
perl v5.8.7 2005-09-20 WALKER(1)
