Question

How to config PORT KNOCKING on CSF and access it by linux?

I’m trying to run port knocking work on a CSF on a small VPS, i setup this:

1 - the result of csf first test ok

2 -

TCP_IN = “53,80” TCP_OUT = “53,80,113,443” UDP_IN = “53” UDP_OUT = “53,113,123” PORTKNOCKING = “3000;TCP;30;1000;1001;1002;1003” //dummy ports 3 - after csf -r

4 - after restarted the vps

5 - tryed to use knockd on pc to knock the server

knock -v 0.0.0.0 1000 1001 1002 1003 //dummy ip 6 - and less than 20 seconds use

ssh myuser@0.0.0.0 -p 3000 //dummy ip but cant connect, i never did it before, like a printf(“HelloWorld”); for me. If someone could help me i will be really glad.

More info, my sshd_config:

PORT 3000 PermitRootLogin no StrictModes yes AllowUsers myuser


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