Skip to content

SSH

SSH是GOST中的一种数据通道类型。

SSH有两种模式：隧道模式和转发模式。

隧道模式

服务端

gost -L relay+ssh://:2222

services:
- name: service-0
  addr: :2222
  handler:
    type: relay
  listener:
    type: ssh

客户端

gost -L :8080 -F relay+ssh://:2222

services:
- name: service-0
  addr: :8080
  handler:
    type: auto
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :2222
      connector:
        type: relay
      dialer:
        type: ssh

转发模式

采用标准SSH协议的端口转发功能，仅支持TCP。

服务端

gost -L sshd://:2222

services:
- name: service-0
  addr: :
  handler:
    type: sshd
  listener:
    type: sshd

客户端

gost -L tcp://:8080/:80 -F sshd://:2222

services:
- name: service-0
  addr: :8080
  handler:
    type: tcp
    chain: chain-0
  listener:
    type: tcp
  forwarder:
    nodes:
    - name: target-0
      addr: :80
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :2222
      connector:
        type: sshd
      dialer:
        type: sshd

使用系统本身的SSH服务

在转发模式下服务端可以直接使用系统本身的SSH服务，例如Linux中的OpenSSH(sshd)服务。

认证

SSH支持用户名/密码认证和PubKey认证两种认证方式。

用户名/密码认证

认证信息作用对象

在命令行模式下，认证信息(user:pass)设置的是SSH通道的认证(Listener和Dialer)，而非Handler和Connector。 此行为仅在使用ssh和sshd通道时有效。

服务端

gost -L relay+ssh://user:pass@:2222
或

gost -L sshd://user:pass@:2222

services:
- name: service-0
  addr: :2222
  handler:
    type: relay
  listener:
    type: ssh
    auth:
      username: user
      password: pass

客户端

gost -L :8080 -F relay+ssh://user:pass@:2222
或

gost -L tcp://:8080/:80 -F sshd://user:pass@:2222

services:
- name: service-0
  addr: :8080
  handler:
    type: auto
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :2222
      connector:
        type: relay
      dialer:
        type: ssh
        auth:
          username: user
          password: pass

PubKey认证

服务端

服务端通过authorizedKeys选项设置已授权客户端公钥列表。

gost -L "relay+ssh://:2222?authorizedKeys=/path/to/authorizedKeys"
或

gost -L "sshd://:2222?authorizedKeys=/path/to/authorizedKeys"

services:
- name: service-0
  addr: :2222
  handler:
    type: relay
  listener:
    type: ssh
    metadata:
      authorizedKeys: /path/to/authorizedKeys

客户端

客户端通过privateKeyFile和passphrase选项设置证书私钥和私钥密码。

gost -L :8080 -F "relay+ssh://:2222?privateKeyFile=/path/to/privateKeyFile&passphrase=123456"
或

gost -L tcp://:8080/:80 -F "sshd://:2222?privateKeyFile=/path/to/privateKeyFile&passphrase=123456"

services:
- name: service-0
  addr: :8080
  handler:
    type: auto
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :2222
      connector:
        type: relay
      dialer:
        type: ssh
        metadata:
          privateKeyFile: /path/to/privateKeyFile
          passphrase: "123456"

心跳

客户端通过keepalive选项开启心跳，并通过ttl选项设置心跳包发送的间隔时长(默认30s)。

也可以通过keepalive.timeout选项设置心跳超时时长(默认15s)，keepalive.retries选项设置心跳发送重试次数(默认1次)

gost -L :8080 -F "relay+ssh://:2222?keepalive=true&ttl=30s"
或

gost -L tcp://:8080/:80 -F "sshd://:2222?keepalive=true&ttl=30s"

services:
- name: service-0
  addr: :8080
  handler:
    type: auto
    chain: chain-0
  listener:
    type: tcp
chains:
- name: chain-0
  hops:
  - name: hop-0
    nodes:
    - name: node-0
      addr: :2222
      connector:
        type: relay
      dialer:
        type: ssh
        metadata:
          keepalive: true
          ttl: 30s
          keepalive.timeout: 15s
          keepalive.retries: 1

组合使用

SSH数据通道的隧道模式可以与各种代理协议组合使用。

HTTP Over SSH

gost -L http+ssh://:2222

services:
- name: service-0
  addr: :2222
  handler:
    type: http
  listener:
    type: ssh

SOCKS5 Over SSH

gost -L socks5+ssh://:2222

services:
- name: service-0
  addr: :2222
  handler:
    type: socks5
  listener:
    type: ssh

Relay Over SSH

gost -L relay+ssh://:2222

services:
- name: service-0
  addr: :8443
  handler:
    type: relay
  listener:
    type: ssh

端口转发

SSH通道的隧道模式也可以用作端口转发。

服务端

gost -L ssh://:2222/:1080 -L socks5://:1080
等同于

gost -L forward+ssh://:2222/:1080 -L socks5://:1080

services:
- name: service-0
  addr: :2222
  handler:
    type: forward
  listener:
    type: ssh
  forwarder:
    nodes:
    - name: target-0
      addr: :1080
- name: service-1
  addr: :1080
  handler:
    type: socks5
  listener:
    type: tcp

通过使用SSH数据通道的端口转发，给1080端口的SOCKS5代理服务增加了SSH数据通道。

此时2222端口等同于：

gost -L socks5+ssh://:2222

Comments