Docker cannot access the host's network

[SitQ80]

Version : TrueNAS-SCALE-22.02-RC.1-1

My truenas IP is 192.168.1.10

In truenas, I created a docker container, used Add external Interface and DHCP automatically obtained an ip: 192.168.1.22

in docker container, I ping any internal network device is normal, except the host computer. My ping 192.168.1.10 is timed out.

Why docker container cannot access the host's network

 

[SitQ80]

ifconfig

Code:

eth0      Link encap:Ethernet
          inet addr:172.16.0.60  Bcast:172.16.255.255  Mask:255.255.0.0


lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0


net1      Link encap:Ethernet 
          inet addr:192.168.2.22  Bcast:192.168.2.255  Mask:255.255.255.0


tun0      Link encap:UNSPEC 
          inet addr:10.0.0.1  P-t-P:10.0.0.2  Mask:255.255.255.255

Code:

bash-5.0# ping 172.16.0.1
PING 172.16.0.1 (172.16.0.1): 56 data bytes
64 bytes from 172.16.0.1: seq=0 ttl=64 time=0.158 ms
64 bytes from 172.16.0.1: seq=1 ttl=64 time=0.165 ms
64 bytes from 172.16.0.1: seq=2 ttl=64 time=0.168 ms
64 bytes from 172.16.0.1: seq=3 ttl=64 time=0.175 ms
^C
--- 172.16.0.1 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 0.158/0.166/0.175 ms
bash-5.0# ping 192.168.2.10
PING 192.168.2.10 (192.168.2.10): 56 data bytes
^C
--- 192.168.2.10 ping statistics ---
8 packets transmitted, 0 packets received, 100% packet loss

ping other devices 192.168.2.1 & 192.168.2.5 is normal.

 

[SitQ80]

Because I use an openvpn docker image（kylemanna/openvpn）, I am very troubled by the problems I am facing now. I connect to openvpn and can only use all devices except truenas devices.

 

[SitQ80]

tcpdump

IP 192.168.2.5 > 192.168.2.22: ICMP echo reply, id 29184, seq 0, length 64
IP 192.168.2.22 > 192.168.2.5: ICMP echo request, id 29184, seq 1, length 64
IP 192.168.2.5 > 192.168.2.22: ICMP echo reply, id 29184, seq 1, length 64

IP 192.168.2.22 > 192.168.2.22: ICMP host 192.168.2.10 unreachable, length 92
IP 192.168.2.22 > 192.168.2.22: ICMP host 192.168.2.10 unreachable, length 92

 

[SitQ80]

You can try to use the nginx docker image to TEST MY QUESTION, then install the iputils-ping package, try to ping your host.

You will find that you cannot ping the host

 

[Kieros]

Welcome to truenas forum where so many questions remain unanswered.
Did you ever solve this problem. I have the same issue