ssh_exchange_identification: read: Connection timed out

I connecting into a Raspberry PI using ssh from my windows machine and getting the following message : PS C:\Users\user> ssh pi@172.16.20.100 -vvv OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5 debug1: Reading configuration data C:\\Users\\user/.ssh/config debug1: Reading configuration data __PROGRAMDATA__\\ssh/ssh_config debug2: resolve_canonicalize: hostname 172.16.20.100 is address debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to 172.16.20.100 [172.16.20.100] port 22. debug1: Connection established. debug1: identity file C:\\Users\\user/.ssh/id_rsa type 0 debug3: Failed to open file:C:/Users/user/.ssh/id_rsa-cert error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_rsa-cert.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_rsa-cert type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_dsa error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_dsa.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_dsa type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_dsa-cert error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_dsa-cert.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_dsa-cert type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_ecdsa error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_ecdsa.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_ecdsa type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_ecdsa-cert error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_ecdsa-cert.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_ecdsa-cert type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_ed25519 error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_ed25519.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_ed25519 type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_ed25519-cert error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_ed25519-cert.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_ed25519-cert type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_xmss error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_xmss.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_xmss type -1 debug3: Failed to open file:C:/Users/user/.ssh/id_xmss-cert error:2 debug3: Failed to open file:C:/Users/user/.ssh/id_xmss-cert.pub error:2 debug1: key_load_public: No such file or directory debug1: identity file C:\\Users\\user/.ssh/id_xmss-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.7 debug3: recv - from CB(2) ERROR:138, io:000001A90E8E96E0 ssh_exchange_identification: read: Connection timed out On the raspberry pi (server side) I type: sudo /usr/sbin/sshd -d debug1: sshd version OpenSSH_7.9, OpenSSL 1.1.1d 10 Sep 2019 debug1: private host key #0: ssh-rsa SHA256:aXZ4Le7wCYPTbrCbVJ0rFrIlTcXKAllLJ9BgFgtwDEA debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:LCjd0igPxbcFfN+9wK7m2C4SykVPK7scQxrUnwYJyDQ debug1: private host key #2: ssh-ed25519 SHA256:C+fhR3x/Vj7W4VY5ZeQhFoSJkhGWAkdgK2baFJ0IJcM debug1: rexec_argv='/usr/sbin/sshd' debug1: rexec_argv='-d' debug1: Set /proc/self/oom_score_adj from 0 to -1000 debug1: Bind to port 22 on 0.0.0.0. Bind to port 22 on 0.0.0.0 failed: Address already in use. debug1: Bind to port 22 on ::. Bind to port 22 on :: failed: Address already in use. Cannot bind any address. how do i get connected?