Forwarding 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 10.0.4.1/24
.
My linux setup uses the interface enp0s3
as the default option. To forward any ICMP response to the TAP interface, I tried the following rules:
# iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.4.1
# iptables -A FORWARD -p icmp -i enp0s3 -j ACCEPT
# iptables -t nat -A POSTROUTING -o 10.0.4.1 -j MASQUERADE
At the moment, the TAP interface is in UP state, and I have a program which is listening to the TAP interface.
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 is getting forwarded to the TAP interface ? Also, is my approach to redirect traffic to the TAP device correct ?
netfilter icmp tap
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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 10.0.4.1/24
.
My linux setup uses the interface enp0s3
as the default option. To forward any ICMP response to the TAP interface, I tried the following rules:
# iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.4.1
# iptables -A FORWARD -p icmp -i enp0s3 -j ACCEPT
# iptables -t nat -A POSTROUTING -o 10.0.4.1 -j MASQUERADE
At the moment, the TAP interface is in UP state, and I have a program which is listening to the TAP interface.
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 is getting forwarded to the TAP interface ? Also, is my approach to redirect traffic to the TAP device correct ?
netfilter icmp tap
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 10.0.4.1/24
.
My linux setup uses the interface enp0s3
as the default option. To forward any ICMP response to the TAP interface, I tried the following rules:
# iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.4.1
# iptables -A FORWARD -p icmp -i enp0s3 -j ACCEPT
# iptables -t nat -A POSTROUTING -o 10.0.4.1 -j MASQUERADE
At the moment, the TAP interface is in UP state, and I have a program which is listening to the TAP interface.
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 is getting forwarded to the TAP interface ? Also, is my approach to redirect traffic to the TAP device correct ?
netfilter icmp tap
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 10.0.4.1/24
.
My linux setup uses the interface enp0s3
as the default option. To forward any ICMP response to the TAP interface, I tried the following rules:
# iptables -t nat -A PREROUTING -i enp0s3 -p icmp -j DNAT --to 10.0.4.1
# iptables -A FORWARD -p icmp -i enp0s3 -j ACCEPT
# iptables -t nat -A POSTROUTING -o 10.0.4.1 -j MASQUERADE
At the moment, the TAP interface is in UP state, and I have a program which is listening to the TAP interface.
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 is getting forwarded to the TAP interface ? Also, is my approach to redirect traffic to the TAP device correct ?
netfilter icmp tap
netfilter icmp tap
edited 50 mins ago
Jake
asked 6 hours ago
JakeJake
539722
539722
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add a comment |
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