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Multipurpose relay (SOcket CAT). More information:

  • Listen to a port, wait for an incoming connection and transfer data to STDIO:

socat - TCP-LISTEN:8080,fork

  • Listen on a port using SSL and print to STDOUT:

socat OPENSSL-LISTEN:4433,reuseaddr,cert=./cert.pem,cafile=./ca.cert.pem,key=./key.pem,verify=0 STDOUT

  • Create a connection to a host and port, transfer data in STDIO to connected host:

socat -

  • Forward incoming data of a local port to another host and port:

socat TCP-LISTEN:80,fork