logging outbound traffic iptables
I am pretty new to iptables and I make some exercices for myself to gain knowledge. Let assume the following scenario:
I have a gateway (internal IP=192.168.1.1, external IP=172.17.0.28, interface eth0) and I have a client in the subnet of the gateway (internal IP=192.168.1.2).
Now, I masqueraded the gateway that I have the possibility to use internet from the client over the gateway with the following nat table entry:
-A POSTROUTING -o eth0 -j MASQUERADE
My current target is to log all ICMP packets from client, which are routed over the gateway to the internet and all coming from the internet to the client. I want to log all "internet communication" from client over the gateway. How I can reach that?
My first approach was an entry by the gateway:
iptables -A FORWARD -i eth0 -d 192.168.1.2 -p icmp -j NFLOG
iptables -A FORWARD -d eth0 -s 192.168.1.2 -p icmp -j NFLOG
But that doesn't work. Could you give me a little hint what I miss by my thoughts?
Greetings
logging iptables
asked Nov 22 '18 at 15:02
user3461406user3461406
11
add a comment |
I am pretty new to iptables and I make some exercices for myself to gain knowledge. Let assume the following scenario:
I have a gateway (internal IP=192.168.1.1, external IP=172.17.0.28, interface eth0) and I have a client in the subnet of the gateway (internal IP=192.168.1.2).
Now, I masqueraded the gateway that I have the possibility to use internet from the client over the gateway with the following nat table entry:
-A POSTROUTING -o eth0 -j MASQUERADE
My current target is to log all ICMP packets from client, which are routed over the gateway to the internet and all coming from the internet to the client. I want to log all "internet communication" from client over the gateway. How I can reach that?
My first approach was an entry by the gateway:
iptables -A FORWARD -i eth0 -d 192.168.1.2 -p icmp -j NFLOG
iptables -A FORWARD -d eth0 -s 192.168.1.2 -p icmp -j NFLOG
But that doesn't work. Could you give me a little hint what I miss by my thoughts?
Greetings
logging iptables
asked Nov 22 '18 at 15:02
user3461406user3461406
11
add a comment |
I am pretty new to iptables and I make some exercices for myself to gain knowledge. Let assume the following scenario:
I have a gateway (internal IP=192.168.1.1, external IP=172.17.0.28, interface eth0) and I have a client in the subnet of the gateway (internal IP=192.168.1.2).
Now, I masqueraded the gateway that I have the possibility to use internet from the client over the gateway with the following nat table entry:
-A POSTROUTING -o eth0 -j MASQUERADE
My current target is to log all ICMP packets from client, which are routed over the gateway to the internet and all coming from the internet to the client. I want to log all "internet communication" from client over the gateway. How I can reach that?
My first approach was an entry by the gateway:
iptables -A FORWARD -i eth0 -d 192.168.1.2 -p icmp -j NFLOG
iptables -A FORWARD -d eth0 -s 192.168.1.2 -p icmp -j NFLOG
But that doesn't work. Could you give me a little hint what I miss by my thoughts?
Greetings
logging iptables
asked Nov 22 '18 at 15:02
user3461406user3461406
11
I am pretty new to iptables and I make some exercices for myself to gain knowledge. Let assume the following scenario:
I have a gateway (internal IP=192.168.1.1, external IP=172.17.0.28, interface eth0) and I have a client in the subnet of the gateway (internal IP=192.168.1.2).
Now, I masqueraded the gateway that I have the possibility to use internet from the client over the gateway with the following nat table entry:
-A POSTROUTING -o eth0 -j MASQUERADE
My current target is to log all ICMP packets from client, which are routed over the gateway to the internet and all coming from the internet to the client. I want to log all "internet communication" from client over the gateway. How I can reach that?
My first approach was an entry by the gateway:
iptables -A FORWARD -i eth0 -d 192.168.1.2 -p icmp -j NFLOG
iptables -A FORWARD -d eth0 -s 192.168.1.2 -p icmp -j NFLOG
But that doesn't work. Could you give me a little hint what I miss by my thoughts?
Greetings
logging iptables
logging iptables
asked Nov 22 '18 at 15:02
user3461406user3461406
11
asked Nov 22 '18 at 15:02
user3461406user3461406
11
asked Nov 22 '18 at 15:02
user3461406user3461406
11
asked Nov 22 '18 at 15:02
user3461406user3461406
11
asked Nov 22 '18 at 15:02
user3461406user3461406
11
11
add a comment |
add a comment |
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