ssh ポート転送機能がわかりません sshclientsever_1sever_2TCP sever_1sever_2 clientsever_1sshsever_1TCP sever_1sever_2TCPsever_1sever_2sever_1sever_2TCP sever_1sever_2 client <-> sever_1 <-> sever_2

HTTP () `LocalForward`
client server_1 `-L 8080:server_2:80` client - server_1
(client ssh server_1 sshd )


[client]$ ssh -f -N -L 8080:server_2:80 server_1

client(ssh) ======()======> server_1(sshd)


client 127.0.0.1:8080 LocalForward server_1 sshd server_2 80 client

client - server_1 ()
server_1 - server_2


[client]$ curl

client(ssh) ======()======> server_1(sshd)
curl ---(HTTP/)---> --(HTTP)--> server_2(httpd):80


HTTP client(curl) server_2(httpd) server_1 TCP
server_2 server_1 server_1 sshd

SSH LocalForward client - server_1


[client]$ ssh -f -N -L 10022:server_2:22 server_1
[client]$ ssh -p 10022 user@127.0.0.1

client(ssh) ======()======> server_1(sshd)
ssh ----(SSH/)----> --(SSH)---> server_2(sshd):22