Filezila(mac version) — use ssh forward port

Flow
localhost(mac) IP: [port A] -> server1 IP:[port B] -> server2 IP:[port C]

Step
-create ssh forward and login

ssh -L [port A]:[server2 IP]:[port C] [user]@[server1 IP] -p [port B]
ssh -L 1222:192.168.1.1:22 test@171.2.1.1 -p 1111

-filezila
host: localhost
port: 1222
user: [user for server2]
password: [server2 password]