Re: Ping Problem with Nmap 5.20 (machine specific).

[Ben Dalling <b.dalling () locp co uk>]

Hi,

All these installs were made with the RPM (including 5.21). 5.21  
showing the same problem as 5.20. Build from source works fine, so I'm  
happy enough with that.

Cheers,

Ben Dalling

On 27 Jan 2010, at 08:46, Ben Dalling <b.dalling () locp co uk> wrote:

> Hi,
>
> Just to clarify, this problem is only affecting the machine that we  
> use
> for carrying out regular Nmap scans on our network.  Nmap 5.20 works  
> fine
> on other nodes within our network and this is a problem specific to  
> the
> machine I'm using.
>
> The machine in question is a virtual machine running on top of VMware
> ESX.  The guest OS of the virtual machine is Red Hat Enterprise Server
> 5.4.  When I run Nmap 5.20 it doesn't see any remote machines (see  
> output
> below).  When I reinstall Nmap 5.00 everything works OK again.
>
> Has anyone got any ideas why this particular machine isn't getting  
> on with
> the new version of Nmap?
>
> *** Sample output ***
> # nmap -sS -sU -A foobar
>
> Starting Nmap 5.20 ( http://nmap.org ) at 2010-01-27 08:05 GMT
> Note: Host seems down. If it is really up, but blocking our ping  
> probes, try -PN
> Nmap done: 1 IP address (0 hosts up) scanned in 0.60 seconds
> # nmap -sS -sU -A -PN foobar
>
> Starting Nmap 5.20 ( http://nmap.org ) at 2010-01-27 08:05 GMT
> Nmap done: 1 IP address (0 hosts up) scanned in 0.60 seconds
> # ping -c 1 foobar
> PING foobar (10.201.228.46) 56(84) bytes of data.
> 64 bytes from foobar (10.201.228.46): icmp_seq=1 ttl=64 time=0.257 ms
>
> --- foobar ping statistics ---
> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> rtt min/avg/max/mdev = 0.257/0.257/0.257/0.000 ms
> *** End of sample output ***
>
> Best regards,
> --
> Ben Dalling
> email: b.dalling () locp co uk
> www: http://www.locp.co.uk
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