Forward ICMP response to TAP interface
I am trying to do a test where I forward ICMP responses to a TAP interface. I created a TAP interface and assigned it the address 10.0.6.1/24.
My linux setup uses the interface enp0s3 as the default option. To forward any ICMP response to the TAP interface, I tried the following rule:
iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.6.1
At the moment, the TAP interface is in UP state, but since no program is attached to it, the link status shows linkdown.
If I ping an external IP like 8.8.8.8, I still am able to get the response. I want to ask shouldn't the ping program not receive any response because ICMP response would go to TAP which is currently a dead end ?
networking icmp tap
asked 1 hour ago
JakeJake
529722
add a comment |
I am trying to do a test where I forward ICMP responses to a TAP interface. I created a TAP interface and assigned it the address 10.0.6.1/24.
My linux setup uses the interface enp0s3 as the default option. To forward any ICMP response to the TAP interface, I tried the following rule:
iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.6.1
At the moment, the TAP interface is in UP state, but since no program is attached to it, the link status shows linkdown.
If I ping an external IP like 8.8.8.8, I still am able to get the response. I want to ask shouldn't the ping program not receive any response because ICMP response would go to TAP which is currently a dead end ?
networking icmp tap
asked 1 hour ago
JakeJake
529722
add a comment |
I am trying to do a test where I forward ICMP responses to a TAP interface. I created a TAP interface and assigned it the address 10.0.6.1/24.
My linux setup uses the interface enp0s3 as the default option. To forward any ICMP response to the TAP interface, I tried the following rule:
iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.6.1
At the moment, the TAP interface is in UP state, but since no program is attached to it, the link status shows linkdown.
If I ping an external IP like 8.8.8.8, I still am able to get the response. I want to ask shouldn't the ping program not receive any response because ICMP response would go to TAP which is currently a dead end ?
networking icmp tap
asked 1 hour ago
JakeJake
529722
I am trying to do a test where I forward ICMP responses to a TAP interface. I created a TAP interface and assigned it the address 10.0.6.1/24.
My linux setup uses the interface enp0s3 as the default option. To forward any ICMP response to the TAP interface, I tried the following rule:
iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.6.1
At the moment, the TAP interface is in UP state, but since no program is attached to it, the link status shows linkdown.
If I ping an external IP like 8.8.8.8, I still am able to get the response. I want to ask shouldn't the ping program not receive any response because ICMP response would go to TAP which is currently a dead end ?
networking icmp tap
networking icmp tap
asked 1 hour ago
JakeJake
529722
asked 1 hour ago
JakeJake
529722
asked 1 hour ago
JakeJake
529722
asked 1 hour ago
JakeJake
529722
asked 1 hour ago
JakeJake
529722
529722
add a comment |
add a comment |
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