SFTP SCP malware not found and blocked on firewall

[DannyDai]

i took a test for SFTP/SCP  file transmission. but i can't see anything in our logs.  i knew SSH decryption, i tried. but no use. i dont know how to understand SSH decryption( no threat checking for SSH tunnel), actully i dont have SSH tunnel.

and Antivirus' docoders , since decoders dont have SFTP coding scheme.

wht i have in mind is  there are tens of thousands of encoding/decoding schemes . some of them are public opened , others are private.  it is too hard for a firewall to include most of schemes , then to block malware via a specific encoding.

that means endpoint sulution is very very mandatary to have

thanks

Danny