After a reload of the configuration file, knockd does not listen to new ports

[BenediktS]

I started with a simple configuration that worked fine. Then i added a other section in /etc/knockd.conf and tryed to load it like this:

"systemctl reload knockd.service"

in the log was a confirmation:

"knockd[10853]: Reload service KNOCKD ..done"

but the new section just didn't work. I tryed many different things, but always only the same Ports worked that worked in the beginning.

I had to shutdown the service and restart it. After that, all worked fine.

I think the problem is, that the signal SIGHUP re-reads the config

signal(SIGHUP, read_cfg);

but the filter in the Kernel are just created and loaded once. And is not recreated after a reload.

generate_pcap_filter();

so changes in the port sequenz are only efectiv when you use the same ports. if not, the changes will not work.

[airwoflgh]

Should be fixed in my fork.