After removing the unconverted IPv4 addresses from the Webalizer statistics
of a domain,
there's a long list of PTR records and an occasional A record left behind.
nMap has a
useful script (--script asn-query) to perform lookups of the ASN, port
status, CIDR
block, country code, and even the IPv4 address, all in one go, with an -iL
of that long list.
There's a hitch in this process: Large numbers of hostnames "Failed to
resolve."
Can I add {grep "Failed to resolve" [to one output file]} in addition
to the output file of the successful portions of the nMap scan ? Once the
process of an
nMap scan is over, I can copy and paste some of what could have been the grep
output
file from the console, but the vast majority of that output has scrolled off
the top of
the console ...
I capture those IPv4 addresses manually by simple inspection, with an
occasional one a
derivative of the ARPA record (i.e., backwards). In a list of 10,000 such
rejected
PTR records, about ninety percent can be extracted in a LibreOffice Calc
spreadsheet.
Some of the hostnames with embedded IPv4 addresses make it through nMap's
reverse
hostname lookup process, perhaps because they haven't got a duplicate PTR
record with
the same IPv4 address embedded in it.
In the attached file has about half such easily looked-up hostnames, mainly
because
I selected a group from the batch I captured from the console that have some
diversity.
George Langford
Failed to resolve "ppp.246.16.mdl.net".
Failed to resolve "pppoe-95.189.101.86.chittel.su".
Failed to resolve "pppoe-95.189.123.70.chittel.su".
Failed to resolve "pppoe-95.189.78.99.chittel.su".
Failed to resolve "primeinternacional.static.gvt.net.br".
Failed to resolve "printer.accountsstuffleadsone.com".
Failed to resolve "promote.cache-dns.local".
Failed to resolve "proxy-wdc1-134.att.com".
Failed to resolve "proxy-wdc1-135.att.com".
Failed to resolve "proxy.osakidetza.net".
Failed to resolve "prs01-43-076.wlink.com.np".
Failed to resolve "prs01-43-139.wlink.com.np".
Failed to resolve "pubdns-64-23-56-171.hscc.hostwaycloud.com".
Failed to resolve "q.jaso.ru".
Failed to resolve "r-103-57-62-5.consumer-pool.prcdn.net".
Failed to resolve "r-93-56-62-5.consumer-pool.prcdn.net".
Failed to resolve "r-95-128-142-106.parmatel.ru".
Failed to resolve "rdns216-244-77-13.pivps.com".
Failed to resolve "rematetv.static.gvt.net.br".
Failed to resolve "reserve-bras.adelaide.esc.net.au".
Failed to resolve "residencial-200.6.173.58.costanet.com.co".
Failed to resolve "residencial-200.6.180.146.costanet.com.co".
Failed to resolve "rev-103.103.52.53.catlabroadband.com".
Failed to resolve "rev-dns-cloud-bkk-45-147-5-139-th.nipa.cloud".
Failed to resolve "roper.static.gvt.net.br".
