My system topology:
On an ubuntu machine with 2 ethernet ports (eth0, eth1) i have connected another ubuntu machine as client and an OCRCamera (also client).
the requirement is that the main ubuntu machine will be DHCP server and router, so that the ubuntu-client and the camera will both get IP address from the main ubuntu machine. The ubuntu-client and the camera need to be able to ping/ssh one another.
with nmcli commands and configuration file in "/etc/dnsmasq.d/X", i have configured both eth0 and eth1 on the main ubuntu machine in a shared mode:
"/etc/dnsmasq.d/XXX" config file:
no-resolv
port=53
bogus-priv
strict-order
expand-hosts
domain=wombat.pixellot.com
# Set Listen address
listen-address=192.168.101.1
dhcp-range=set:group1,192.168.101.10,192.168.101.100,24h
dhcp-option=tag:group1,option:router,192.168.101.1
dhcp-option=tag:group1,option:dns-server,192.168.101.1
dhcp-option=tag:group1,option:netmask,255.255.255.0
listen-address=192.168.102.1
dhcp-range=set:group2,192.168.102.10,192.168.102.100,24h
dhcp-option=tag:group2,option:router,192.168.102.1
dhcp-option=tag:group2,option:dns-server,192.168.102.1
dhcp-option=tag:group2,option:netmask,255.255.255.0
nmcli commands:
sudo nmcli connection add type ethernet ifname eth0 ipv4.method shared con-name EthCon0
sudo nmcli connection add type ethernet ifname eth1 ipv4.method shared con-name EthCon1
sudo nmcli connection modify EthCon0 ipv4.addresses 169.254.101.1/24
sudo nmcli connection modify EthCon1 ipv4.addresses 169.254.101.2/24
sudo nmcli connection up EthCon0
sudo nmcli connection up EthCon1
This is how ifconfig on the main ubuntu machine looks like:
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.101.1 netmask 255.255.255.0 broadcast 192.168.101.255
inet6 fe80::c706:5a57:f51d:a8b0 prefixlen 64 scopeid 0x20<link>
ether 48:b0:2d:3b:6d:0b txqueuelen 1000 (Ethernet)
RX packets 76802 bytes 6700303 (6.7 MB)
RX errors 0 dropped 8 overruns 0 frame 0
TX packets 73153 bytes 7426646 (7.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 37
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.102.1 netmask 255.255.255.0 broadcast 192.168.102.255
inet6 fe80::cf74:51de:1317:fe42 prefixlen 64 scopeid 0x20<link>
ether ae:aa:82:3c:08:6c txqueuelen 1000 (Ethernet)
RX packets 41 bytes 4289 (4.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 187 bytes 29743 (29.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
The ubuntu client, and the camera connected to eth0 and eth1 respectively, got an ip addressed, and pinging is available:
pixellot@wombat:~$ sudo ping 192.168.101.98
PING 192.168.101.98 (192.168.101.98) 56(84) bytes of data.
64 bytes from 192.168.101.98: icmp_seq=1 ttl=64 time=0.581 ms
64 bytes from 192.168.101.98: icmp_seq=2 ttl=64 time=0.569 ms
pixellot@wombat:~$ sudo ping 192.168.102.32
PING 192.168.102.32 (192.168.102.32) 56(84) bytes of data.
64 bytes from 192.168.102.32: icmp_seq=1 ttl=64 time=0.451 ms
64 bytes from 192.168.102.32: icmp_seq=2 ttl=64 time=0.508 ms
but, when i'm trying to ping from the ubuntu-client to the camera, it wont work:
yvesh@yvesh-XPS-15-9510:~$ ping 192.168.102.32
PING 192.168.102.32 (192.168.102.32) 56(84) bytes of data.
From 192.168.101.98 icmp_seq=1 Destination Host Unreachable
From 192.168.101.98 icmp_seq=2 Destination Host Unreachable
How can i make both clients communicate with each-other? Is there any routing solution to this issue? (Not ssh-tunneling) i have tried many things but i am stuck real bad on it and cant develop further :-( Please help! <3
