Route from netns through a veth link
I have created a network namespace (with ip netns add) and a pair of veth links, veth-a and veth-b. The physical link in the root namespace is named eth0. veth-a is in the root namespace and veth-b is in the newly created one.
IP addresses:
eth0: 192.168.1.100/24
veth-a: 192.168.1.101/24
veth-b: 192.168.1.102/24
Routing table in the root namespace:
default via 192.168.1.1 dev eth0
192.168.1.102 dev virt-a proto kernel scope link src 192.168.1.101
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100
Routing table in the new namespace:
default dev virt-b scope link src 192.168.1.102
I can ping 192.168.1.102 from the root namespace and can ping 192.168.1.100 and 192.168.1.101 from the new namespace. However, I'm not able to ping other physical machines on the lan (eg 192.168.1.1).
I log incoming packets to the root namespace (with iptables -t raw -A PREROUTING -i virt-a -j LOG --log-prefix "[raw-PRE] " --log-level 7) and nothing makes it into the root namespace.
What am I misunderstanding about veth or namespaces?
iptables namespace network-namespaces veth
asked 1 hour ago
user10387080
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I have created a network namespace (with ip netns add) and a pair of veth links, veth-a and veth-b. The physical link in the root namespace is named eth0. veth-a is in the root namespace and veth-b is in the newly created one.
IP addresses:
eth0: 192.168.1.100/24
veth-a: 192.168.1.101/24
veth-b: 192.168.1.102/24
Routing table in the root namespace:
default via 192.168.1.1 dev eth0
192.168.1.102 dev virt-a proto kernel scope link src 192.168.1.101
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100
Routing table in the new namespace:
default dev virt-b scope link src 192.168.1.102
I can ping 192.168.1.102 from the root namespace and can ping 192.168.1.100 and 192.168.1.101 from the new namespace. However, I'm not able to ping other physical machines on the lan (eg 192.168.1.1).
I log incoming packets to the root namespace (with iptables -t raw -A PREROUTING -i virt-a -j LOG --log-prefix "[raw-PRE] " --log-level 7) and nothing makes it into the root namespace.
What am I misunderstanding about veth or namespaces?
iptables namespace network-namespaces veth
asked 1 hour ago
user10387080
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have created a network namespace (with ip netns add) and a pair of veth links, veth-a and veth-b. The physical link in the root namespace is named eth0. veth-a is in the root namespace and veth-b is in the newly created one.
IP addresses:
eth0: 192.168.1.100/24
veth-a: 192.168.1.101/24
veth-b: 192.168.1.102/24
Routing table in the root namespace:
default via 192.168.1.1 dev eth0
192.168.1.102 dev virt-a proto kernel scope link src 192.168.1.101
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100
Routing table in the new namespace:
default dev virt-b scope link src 192.168.1.102
I can ping 192.168.1.102 from the root namespace and can ping 192.168.1.100 and 192.168.1.101 from the new namespace. However, I'm not able to ping other physical machines on the lan (eg 192.168.1.1).
I log incoming packets to the root namespace (with iptables -t raw -A PREROUTING -i virt-a -j LOG --log-prefix "[raw-PRE] " --log-level 7) and nothing makes it into the root namespace.
What am I misunderstanding about veth or namespaces?
iptables namespace network-namespaces veth
asked 1 hour ago
user10387080
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have created a network namespace (with ip netns add) and a pair of veth links, veth-a and veth-b. The physical link in the root namespace is named eth0. veth-a is in the root namespace and veth-b is in the newly created one.
IP addresses:
eth0: 192.168.1.100/24
veth-a: 192.168.1.101/24
veth-b: 192.168.1.102/24
Routing table in the root namespace:
default via 192.168.1.1 dev eth0
192.168.1.102 dev virt-a proto kernel scope link src 192.168.1.101
192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.100
Routing table in the new namespace:
default dev virt-b scope link src 192.168.1.102
I can ping 192.168.1.102 from the root namespace and can ping 192.168.1.100 and 192.168.1.101 from the new namespace. However, I'm not able to ping other physical machines on the lan (eg 192.168.1.1).
I log incoming packets to the root namespace (with iptables -t raw -A PREROUTING -i virt-a -j LOG --log-prefix "[raw-PRE] " --log-level 7) and nothing makes it into the root namespace.
What am I misunderstanding about veth or namespaces?
iptables namespace network-namespaces veth
iptables namespace network-namespaces veth
asked 1 hour ago
user10387080
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
user10387080
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
user10387080
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
user10387080
1
asked 1 hour ago
user10387080
1
1
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
user10387080 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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Check out our Code of Conduct.
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