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2021/2/12 -Learn how to inspect and modify the connection tracker in a Network Address Translation (NAT) setup with the conntrack tool.

The conntrack module calls the NAT module to evaluate NAT rules for every new connection (i.e. first packet on a connection) it creates. NAT module evaluates ...

2017/11/19 -At the POSTROUTING hook NAT asks connection tracking for a existing connection ... Run conntrack in event mode on the NAT gateway: conntrack -E ...

2015/3/14 -The conntrack entry is stored into two separate tuples (one for the original direction (red) and another for the reply direction (blue)). Tuples ...

2020/8/9 -Hook packets based on BPF hooking points (BPF's equivalent part of the Netfilter hooks); Implement a completely new conntrack & NAT module based ...

2021/5/17 -Ineffective NAT rules will leak internal addresses to the outer network. Use the nftables “ct state” or the iptables “-m conntrack –ctstate” ...

2017/4/19 -continously monitor ip_conntrack in order to monitor browsing on NAT router ... So, I have a server that also does NAT (masquerading) for my LAN, ...

2020/4/6 -What is conntrack? "Conntrack" is a part of Linux network stack, specifically part of the firewall subsystem. To put that into perspective: ...

2019/4/26 -Connection tracking (“conntrack”) is a core feature of the Linux kernel's networking stack. It allows the kernel to keep track of all ...

And yes, you have to put the rule in the mangle table, because the packets get dropped by the NAT code before they reach the filter table. 3.3 ip_conntrack: max ...