fwknop

Single packet authorization and port knocking for secure network access

brewmacoslinux

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Single Packet Authorization and Port Knocking

fwknopfwknopd

send authorization packet to open firewall port$ fwknop -A tcp/22 -D 192.168.1.1 -k /etc/fwknop/keys/default.key

start port knocking daemon on server$ sudo fwknopd -c /etc/fwknop/fwknopd.conf -d

generate new encryption key for access$ fwknop --key-gen -n MyAccessKey

configure single packet auth with custom stanza$ fwknop -A tcp/443 -D server.example.com -n MyAccessKey --save-rc-stanza

test spa packet without sending to firewall$ fwknop -A tcp/22 -D 192.168.1.1 -k /etc/fwknop/keys/default.key --test