Where is the fwknopd port 62201 firewall rule?

Installing and Using OpenWrt
1

My understanding is that fwknopd listens on port 62201 for the SPA, however I cannot see a port forward or firewall rule that allows this.

I see references to “pcap” interfaces. Does fwknopd run “outside” of the remit of the firewall? Is this implicit in its function/design (ie having access via the firewall would make it show up)?

2

Nope, it filters pcap

3

I see, and that operates “outside” of the firewall?

4

In the same place as tcpdump.

5

eg https://wiki.nftables.org/wiki-nftables/index.php/Port_knocking_example

6

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