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List:       nmap-dev
Subject:    Re: Fwd: [Pauldotcom] nmap failing on the mac
From:       David Fifield <david () bamsoftware ! com>
Date:       2010-06-23 18:08:25
Message-ID: 20100623180824.GF8785 () gusto
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On Fri, Jun 04, 2010 at 05:18:39PM +0200, Luis MartinGarcia. wrote:
> I copy a message from pauldotcom mailing list.
> 
> Luis.
> 
> -------- Original Message --------
> Subject: 	[Pauldotcom] nmap failing on the mac
> Date: 	Fri, 4 Jun 2010 13:59:37 +0100
> From: 	Robin Wood <robin@digininja.org>
> To: 	PaulDotCom Mailing List <pauldotcom@mail.pauldotcom.com>
> 
> Both myself and a friend have had the same problem with nmap, I'm on
> the local network and I can ping some machines, the network is up and
> working fine but at some point through an nmap ping scan I start to
> get "No route to host" messages as below:
> 
> root# nmap -sP 192.168.200.0/24
> 
> Starting Nmap 5.30BETA1 ( http://nmap.org ) at 2010-06-04 13:50 BST
> Nmap scan report for 192.168.200.0
> Host is up (0.0068s latency).
> Nmap scan report for 192.168.200.1
> Host is up (0.0018s latency).
> MAC Address: 34:EF:44:29:B3:79 (2Wire)
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.18, 16)
> => No route to host
> Offending packet: ICMP 192.168.200.33 > 192.168.200.18 Timestamp
> request (type=13/code=0) ttl=45 id=27161 iplen=10240
> Sleeping 15 seconds then retrying
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.18, 16)
> => Host is down
> Offending packet: ICMP 192.168.200.33 > 192.168.200.18 Timestamp
> request (type=13/code=0) ttl=45 id=27161 iplen=10240
> Sleeping 60 seconds then retrying
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.21, 16)
> => No route to host
> Offending packet: ICMP 192.168.200.33 > 192.168.200.21 Timestamp
> request (type=13/code=0) ttl=58 id=52667 iplen=10240
> Sleeping 15 seconds then retrying
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.21, 16)
> => Host is down
> Offending packet: ICMP 192.168.200.33 > 192.168.200.21 Timestamp
> request (type=13/code=0) ttl=58 id=52667 iplen=10240
> Sleeping 60 seconds then retrying
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.22, 16)
> => No route to host
> Offending packet: ICMP 192.168.200.33 > 192.168.200.22 Timestamp
> request (type=13/code=0) ttl=52 id=43894 iplen=10240
> Sleeping 15 seconds then retrying
> sendto in send_ip_packet: sendto(4, packet, 40, 0, 192.168.200.22, 16)
> => Host is down
> Offending packet: ICMP 192.168.200.33 > 192.168.200.22 Timestamp
> request (type=13/code=0) ttl=52 id=43894 iplen=10240
> Sleeping 60 seconds then retrying
> 
> The network is still there and I can still ping other machines
> straight after I kill nmap:
> 
> root# ping 192.168.200.1
> PING 192.168.200.1 (192.168.200.1): 56 data bytes
> 64 bytes from 192.168.200.1: icmp_seq=0 ttl=255 time=1.877 ms
> 64 bytes from 192.168.200.1: icmp_seq=1 ttl=255 time=1.438 ms
> 
> I've only used this beta version but the friend who has seen it has
> used various previous versions so it isn't just an issue with the beta
> version.
> 
> Has anyone else seen this and do you know how to fix it?

What's the output of

nmap --iflist
netstat -rn -f inet

Try running these command immediately before the scan and immediately
after you kill nmap to see if the output differs.

David Fifield
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