On 10/28/2015 04:59 PM, Timothy Murphy wrote:> Mark Haney wrote: > >>> On 10/28/2015 9:04 AM, Timothy Murphy wrote: >>> >>>> Why does "arp -a" show IP address 169.254.192.123 >>>> on my 192.168.2.0 home network? > >> Sounds like you have a host with a NIC that's configured for DHCP but >> either can't communicate with the DHCP server, or there are no free IPs >> for the DHCP server to give it. >>> On 10/28/2015 9:04 AM, Timothy Murphy wrote: > > Thanks for your response. > I should have said I'm running CentOS-7.1 on my home server. > Also the actual "arp -a" entry on the server is > (169.254.192.123) at 30:10:b3:2e:cb:ff > > I see that 30:10:b3 is assigned to Lite-On (or Liteon) > which is a Taiwan company, who sell network cards among other things. > And I find when I google to "liteon wifi network" > that there are many queries (and complaints) about mysterious links > involving liteon devices. > > So I guess the strange IP address probably comes from some Lite-On device > somewhere in my house - maybe on the server itself, an HP MicroServer. > There are so many possible electronic culprits today.You should be able to use nmap to scan the device. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20151029/8eb37138/attachment-0001.sig>
Johnny Hughes wrote:>> So I guess the strange IP address probably comes from some Lite-On device >> somewhere in my house - maybe on the server itself, an HP MicroServer. >> There are so many possible electronic culprits today.> You should be able to use nmap to scan the device.Thanks very much for the suggestion, I'll try that. I've been surprised how much information I get from iptraf-ng, which I only discovered recently. I knew about "arp -a", but I'm told I should be using "ip neigh". However, that doesn't give the name of each device on the network (if known), as arp does. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin
On 10/30/2015 09:01 AM, Timothy Murphy wrote:> Johnny Hughes wrote: > >>> So I guess the strange IP address probably comes from some Lite-On device >>> somewhere in my house - maybe on the server itself, an HP MicroServer. >>> There are so many possible electronic culprits today. > >> You should be able to use nmap to scan the device. > > Thanks very much for the suggestion, I'll try that. > > I've been surprised how much information I get from iptraf-ng, > which I only discovered recently. > I knew about "arp -a", but I'm told I should be using "ip neigh". > However, that doesn't give the name of each device on the network > (if known), as arp does. >Try putting this line IPV6INIT=no in the relevant config file, probably something like /etc/sysconfig/networking/devices/ifcfg-eth? then restart your network.