root@ubuntu:~# tcpdump
tcpdump: WARNING: eth0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
15:07:27.396636 IP ubuntu.local > 224.0.0.22: igmp v3 report, 1 group record(s)
15:07:27.489773 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [2q] PTR (QM)? _pgpkey-hkp._tcp.local.[|domain]
15:07:27.657347 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:07:27.713887 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0[|domain]
15:07:27.908605 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:07:28.159567 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:07:28.360666 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0*- [0q] 7/0/0[|domain]
15:07:30.492342 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [2q] PTR (QM)? _pgpkey-hkp._tcp.local.[|domain]
15:07:34.124583 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:07:34.493502 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? _pgpkey-hkp._tcp.local. (40)
15:07:39.124626 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:07:43.172642 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:07:49.176634 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:07:51.632626 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:08:12.261083 IP ubuntu.local > 224.0.0.22: igmp v3 report, 1 group record(s)
15:08:12.356419 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [2q] PTR (QM)? 1.1.168.192.in-addr.arpa.[|domain]
15:08:12.371884 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0[|domain]
15:08:12.374280 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:08:12.625314 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:08:12.876232 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 [4q] [7n][|domain]
15:08:13.076967 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0*- [0q] 7/0/0[|domain]
15:08:15.316574 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:08:15.361048 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? _pgpkey-hkp._tcp.local. (40)
15:08:15.509923 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0*- [0q] 6/0/0[|domain]
15:08:19.316571 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:08:19.362056 IP ubuntu.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? _pgpkey-hkp._tcp.local. (40)
15:08:24.344915 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
15:08:28.349143 ARP, Request who-has 192.168.1.1 tell ubuntu.local, length 28
^C
28 packets captured
28 packets received by filter
0 packets dropped by kernel
127.0.0.1
. Потому всё, что ниже — с ubuntu 9.04, которая запущена с диска. (кубунту 10.10, когда запускалась с диска вела себя как Убунту).ubuntu@ubuntu:~$ tcpdump
tcpdump: no suitable device found
ubuntu@ubuntu:~$ ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.038 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.034 ms
^C
--- 127.0.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.034/0.036/0.038/0.002 ms
ubuntu@ubuntu:~$ netstat -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 0 0 0 eth0
^C
ubuntu@ubuntu:~$ ping 192.168.1.5
PING 192.168.1.5 (192.168.1.5) 56(84) bytes of data.
64 bytes from 192.168.1.5: icmp_seq=1 ttl=64 time=0.042 ms
64 bytes from 192.168.1.5: icmp_seq=2 ttl=64 time=0.041 ms
^C
--- 192.168.1.5 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.041/0.041/0.042/0.006 ms
ubuntu@ubuntu:~$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
ping: sendmsg: Network is unreachable
^C
--- 192.168.1.1 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2016ms
ubuntu@ubuntu:~$ ping 192.168.1.3
PING 192.168.1.3 (192.168.1.3) 56(84) bytes of data.
64 bytes from 192.168.1.3: icmp_seq=1 ttl=64 time=0.285 ms
64 bytes from 192.168.1.3: icmp_seq=2 ttl=64 time=0.283 ms
64 bytes from 192.168.1.3: icmp_seq=3 ttl=64 time=0.279 ms
^C
--- 192.168.1.3 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.279/0.282/0.285/0.013 ms
Не смешите, даже если таких виртуалок нету, то явно не из-за боязни пиратства.)