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Re: "Illegal character(s) in hostname" problem
From: Brandon Enright <bmenrigh () ucsd edu>
Date: Thu, 2 Apr 2009 15:51:11 +0000
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On Thu, 2 Apr 2009 18:35:16 +0300 or thereabouts Henri Salo
<henri () nerv fi> wrote:
On Thu, Apr 02, 2009 at 04:48:29PM +0200, Daniel Roethlisberger wrote:
Henri Salo <henri () nerv fi> 2009-04-02:
I have seen this before. Has there been any patches against this?
Do you know why it happens?
fgeek () foo:~$ /usr/bin/nmap -P0 -sV 188.8.131.52
Starting Nmap 4.85BETA7 ( http://nmap.org ) at 2009-04-02 17:12
EEST Illegal character(s) in hostname -- replacing with '*'
That IP address has an illegal PTR record in reverse DNS.
It points to the DNS root node (".").
Ok. Thank you. Why does Nmap even check the hostname since I was
Nmap perform a reverse-lookup on all IPs you scan unless you use the
"-n" option. Most people prefer to see a hostname over an IP in their
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