aajax
October 9th, 2010, 09:15 PM
When I ping to the fully qualified domain name of my Ubuntu 10.04 (Lucid) system I receive a reply from 127.0.1.1. I've done nothing to define such an interface. Can anyone explain what causes this behavior? I believe it is causing other serious errors on my system.
Here is some console output showing this peculiar behavior.
ajax@Pluto:~$ ping pluto.my.test
PING Pluto.my.test (127.0.1.1) 56(84) bytes of data.
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=1 ttl=64 time=0.030 ms
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=2 ttl=64 time=0.027 ms
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=3 ttl=64 time=0.029 ms
^C
--- Pluto.my.test ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.027/0.028/0.030/0.006 ms
ajax@Pluto:~$
Some factual information about my system follows. The console output that follows
ajax@Pluto:~$ nslookup pluto.my.test
Server: 10.0.0.1
Address: 10.0.0.1#53
Name: pluto.my.test
Address: 10.0.0.12
ajax@Pluto:~$
shows the interface that should respond to a ping. Other documentation concerning my network configuration follows:
/etc/network/interfaces is as follows:
auto lo
iface lo inet loopback
iface eth0 inet static
address 10.0.0.12
netmask 255.255.255.0
gateway 10.0.0.1
auto eth0
iface eth1 inet static
address 10.0.0.12
netmask 255.255.255.0
gateway 10.0.0.1
auto eth1
/etc/resolv.conf is as follows:
# generated by NetworkManager, do not edit!
search my.test
nameserver 10.0.0.1
nameserver 71.252.0.12
domain my.test
Console output from running ifconfig is as follows:
ajax@Pluto:~$ ifconfig
eth1 Link encap:Ethernet HWaddr 00:1e:2a:37:6e:b0
inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::21e:2aff:fe37:6eb0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2045 errors:0 dropped:0 overruns:0 frame:0
TX packets:1389 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2615185 (2.6 MB) TX bytes:127262 (127.2 KB)
Interrupt:18 Base address:0xcc00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:48 errors:0 dropped:0 overruns:0 frame:0
TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3388 (3.3 KB) TX bytes:3388 (3.3 KB)
ajax@Pluto:~$
Here is some console output showing this peculiar behavior.
ajax@Pluto:~$ ping pluto.my.test
PING Pluto.my.test (127.0.1.1) 56(84) bytes of data.
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=1 ttl=64 time=0.030 ms
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=2 ttl=64 time=0.027 ms
64 bytes from Pluto.my.test (127.0.1.1): icmp_seq=3 ttl=64 time=0.029 ms
^C
--- Pluto.my.test ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.027/0.028/0.030/0.006 ms
ajax@Pluto:~$
Some factual information about my system follows. The console output that follows
ajax@Pluto:~$ nslookup pluto.my.test
Server: 10.0.0.1
Address: 10.0.0.1#53
Name: pluto.my.test
Address: 10.0.0.12
ajax@Pluto:~$
shows the interface that should respond to a ping. Other documentation concerning my network configuration follows:
/etc/network/interfaces is as follows:
auto lo
iface lo inet loopback
iface eth0 inet static
address 10.0.0.12
netmask 255.255.255.0
gateway 10.0.0.1
auto eth0
iface eth1 inet static
address 10.0.0.12
netmask 255.255.255.0
gateway 10.0.0.1
auto eth1
/etc/resolv.conf is as follows:
# generated by NetworkManager, do not edit!
search my.test
nameserver 10.0.0.1
nameserver 71.252.0.12
domain my.test
Console output from running ifconfig is as follows:
ajax@Pluto:~$ ifconfig
eth1 Link encap:Ethernet HWaddr 00:1e:2a:37:6e:b0
inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::21e:2aff:fe37:6eb0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2045 errors:0 dropped:0 overruns:0 frame:0
TX packets:1389 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2615185 (2.6 MB) TX bytes:127262 (127.2 KB)
Interrupt:18 Base address:0xcc00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:48 errors:0 dropped:0 overruns:0 frame:0
TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3388 (3.3 KB) TX bytes:3388 (3.3 KB)
ajax@Pluto:~$