If you are connected to a managed switch and have access to that switch. I would check the ARP table to see if there is a duplicate IP address in use.
On Fri, Jun 4, 2010 at 5:59 AM, Robin Wood <[email protected]> wrote: > 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? > > Robin > _______________________________________________ > Pauldotcom mailing list > [email protected] > http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom > Main Web Site: http://pauldotcom.com > _______________________________________________ Pauldotcom mailing list [email protected] http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom Main Web Site: http://pauldotcom.com
