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리눅스의 잘못된 ip_forward 설정

tag-icon • tag-icon linux networking network-interface
리눅스의 잘못된 ip_forward 설정

내 맞춤형 Linux 시스템은 ARM 프로세서를 사용하는 장치 A에서 실행됩니다. 장치 A에는 두 개의 네트워크 카드가 있습니다: ( eth2고정 IP: 192.168.5.1) 및 wlan2(고정 IP: 192.168.1.6). wlan2USB-WiFi 송신기입니다. 을 실행하여 데이터 전달을 비활성화했지만 echo 0 > /proc/sys/net/ipv4/ip_forward여전히 ping 192.168.1.6성공합니다. 어떻게 되어가나요?

[root@dobot ~]# echo 0 > /proc/sys/net/ipv4/ip_forward
[root@dobot ~]# cat /proc/sys/net/ipv4/ip_forward
0
[root@dobot ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.5.1     0.0.0.0         UG    0      0        0 eth2
192.168.1.0     *               255.255.255.0   U     0      0        0 wlan2
192.168.5.0     *               255.255.255.0   U     0      0        0 eth2
192.168.100.0   *               255.255.255.0   U     0      0        0 eth1
[root@dobot ~]# ifconfig eth2
eth2      Link encap:Ethernet  HWaddr 00:0E:C6:87:72:01
          inet addr:192.168.5.1  Bcast:192.168.5.255  Mask:255.255.255.0
          inet6 addr: fe80::20e:c6ff:fe87:7201/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:37729 errors:0 dropped:0 overruns:0 frame:0
          TX packets:55791 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3182517 (3.0 MiB)  TX bytes:7180021 (6.8 MiB)

[root@dobot ~]# ifconfig wlan2
wlan2     Link encap:Ethernet  HWaddr D0:37:45:8A:68:90
          inet addr:192.168.1.6  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::d237:45ff:fe8a:6890/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1110732 errors:0 dropped:503 overruns:0 frame:0
          TX packets:4261 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:32466 (31.7 KiB)  TX bytes:364864 (356.3 KiB)

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