> One this that still bothers me - As I stated in the debug comment, the
PCAP filters are INDEED CORRECT and show the correct (supposed) IP in
the expression when I tried using a virtual NIC, so why wasn't that
actually working as expected?
I don't know your *exact* system network config so I can'
YES! That fixed the issue! THANK YOU! I was up until 3 AM trying to sort
that out. No clue how I missed that directive in the man page. Zombie
eyes, I guess.
One this that still bothers me - As I stated in the debug comment, the
PCAP filters are INDEED CORRECT and show the correct (supposed) IP in
I think you need to use the "Target" knockd config param, otherwise it
uses the interface's primary ip addr. See 'man knockd' and scroll to
the bottom, in the "KNOCK/EVENT DIRECTIVES" section.
** Changed in: knockd (Ubuntu)
Status: New => Invalid
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Debug mode on, the PCAP rule shows the correct secondary IP, but it will
not actually detect the knock on that IP.
Adding pcap expression for door '25568': (dst host xx.xx.xx.76 and
(((tcp dst port 25568 or 25568 or 25568) and tcp[tcpflags] & tcp-syn !=
0)))
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To clarify "does not work", the TCP (or UDP) knock on the configured
port is never detected when using the secondary IP. If I switch to the
primary IP, it works exactly as expected.
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