crypto-knock

An advanced "port knocker" sending signed udp packet instead of port number sequence.

I recommend you use the go implementation of the server. it is more efficient and uses a custom iptable-chain.

install

git clone https://github.com/roypur/crypto-knock
cd crypto-knock
cd go
go build server.go
sudo cp server /usr/bin/cryptoknockd
sudo cp config.json /etc/CryptoKnock/config.json

sample config

/etc/CryptoKnock/config.json

{
    "listen":":5005"
    "chain":"CryptoKnock"
    "key":"MyÜberSecretKey"
}

run

sudo cryptoknockd
sudo iptables -A INPUT -j chain-name

Chrome app