ssh -v stat1006.wikimedia.org             
OpenSSH_8.1p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/gmodena/.ssh/config
debug1: /Users/gmodena/.ssh/config line 19: Applying options for *.wikimedia.org
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: hostname canonicalisation enabled, will re-parse configuration
debug1: re-parsing configuration
debug1: Reading configuration data /Users/gmodena/.ssh/config
debug1: /Users/gmodena/.ssh/config line 19: Applying options for *.wikimedia.org
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Executing proxy command: exec ssh -a -W stat1006.wikimedia.org:22 bast1002.wikimedia.org
debug1: identity file /Users/gmodena/.ssh/prod.key type 0
debug1: identity file /Users/gmodena/.ssh/prod.key-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
Password: 
Password: 
Password: 
gmodena@bast1002.wikimedia.org: Permission denied (publickey,keyboard-interactive).
kex_exchange_identification: Connection closed by remote host