SSH本地和远程端口转发之间的区别

SSH 代表“安全外壳”或“安全套接字外壳”。它是一种加密网络协议，允许两台计算机在不安全的网络（如 Internet）上通信和共享数据。 SSH 协议保护网络免受各种攻击。

1.本地端口转发：
本地端口转发是端口转发的常见类型。它用于让用户从本地计算机连接到另一台服务器，即从运行在与 Secure shell 客户端相同的计算机上的另一客户端应用程序安全地转发数据。通过使用本地端口转发，阻止某些网页的防火墙能够绕过。

2. 远程端口转发：
这种形式的端口转发可以在安全外壳的服务器端启用应用程序。有专有的用于相同的通用目的。要使用远程端口转发，必须知道目标服务器的地址和两个端口号。选择的端口号取决于要使用的应用程序。

SSH LPF 与 SSH RPF 的区别：

SSH LPF	SSH RPF
In this, connections from the SSH client are forwarded via the SSH server, then to a destination server.	In this, connections from the SSH server are forwarded via the SSH client, then to a destination server.
LPF lets you to connect from your local computer to another server.	RPF lets you connect from the remote SSH server to another server.
In OpenSSH, local port forwarding is configured using the -L option.	In OpenSSH, local port forwarding is configured using the -R option.
The basic syntax for LPF with Linux is: ssh -L local_port:destination_server_ip:remote_port ssh_server_hostname	The basic syntax for RPF with Linux is: ssh -R local_port:destination_server_ip:remote_port ssh_server_hostname
For example: If you wanted to connect from your laptop to  http://www.ubuntuforums.org using an SSH tunnel. You would  use source port number 8080 and destination port 80 and destination server www.ubuntuforums.org	For example: If you wanted to let a friend access your remote desktop, using the command-line SSH client.  You would use port number 5900 and destination server localhost : ssh -R 5900: localhost : 5900 guest@jone-pc