snull试验操作

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[root@localhost ~]# insmod snull.o

[root@localhost ~]# dmesg | tail -n1

[root@localhost ~]# vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
192.168.0.88             local0
192.168.0.99             remote0
192.168.1.99             local1
192.168.1.88             remote1

[root@localhost ~]# vi /etc/networks
snullnet0             192.168.0.0         
snullnet1             192.168.1.0      

[root@localhost snull]# ifconfig sn0 local0

[root@localhost snull]# ifconfig sn1 local1

[root@localhost snull]# route add -net snullnet0 netmask 255.255.255.0 sn0

[root@localhost snull]# route add -net snullnet1 netmask 255.255.255.0 sn1
[root@localhost snull]# ifconfig sn0
sn0       Link encap:Ethernet  HWaddr 00:53:4E:55:4C:30  
          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::253:4eff:fe55:4c30/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:2699 (2.6 KiB)
[root@localhost snull]# ifconfig sn1
sn1       Link encap:Ethernet  HWaddr 00:53:4E:55:4C:31  
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::253:4eff:fe55:4c31/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2699 (2.6 KiB)  TX bytes:2492 (2.4 KiB)
[root@localhost snull]# ping -c 1 remote0
PING remote0 (192.168.0.2) 56(84) bytes of data.
64 bytes from remote0 (192.168.0.2): icmp_seq=1 ttl=64 time=11.4 ms
--- remote0 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 11.468/11.468/11.468/0.000 ms


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