Re: nmap bug report, "host down" lines missing on verbose output

[David Fifield <david () bamsoftware com>]

On Fri, May 10, 2013 at 12:45:24PM -0400, Benjamin Dopplinger wrote:
> I think I've encountered a bug which occurs if I'm using the -v parameter
> (for verbose) in addition with the --scan-delay and --host-timeout
> parameters.
>
> I've tried to ping 2 IP addresses which I knew they were unreachable.
> If I'm using the -v and --scan-delay parameter nmap behaves as expected and
> outputs a [host down] line for each IP address which nmap tried to ping but
> was unreachable.
> If I'm using the -v and --host-timeout parameter nmap behaves the same way
> which is perfectly ok.
> But if I'm using the -v, --host-timeout and --scan-delay parameters nmap
> suddenly doesn't show the [host down] lines anymore but shows a "2 hosts
> timed out" message instead. I expected that nmap would print the [host
> down] entries in this case as well.

I think this is by design. Timed-out hosts are omitted from the output.
In some cases a host can time out even after it was found to be up--for
example, during port scanning.

David Fifield
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