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hrbrmstr/reversedns.R

Created September 10, 2013 00:46
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Given a list of IP addresses, perform a reverse lookup and return the original IP address and the resolved FQDN (if any)
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reversedns.R
# "dig" needs to be on your system and in the execution path for this to work
resolved = sapply(ip.list, function(x) system(sprintf("dig -x %s +short",x), intern=TRUE))
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