【SSH问题】能上外网，但 ssh - T git@github.com 提示 192.18.0.x:22 closed

[liuyxiu]

config.yaml如下（来源于网上分享）：

ipv6: false
external-controller: 0.0.0.0:9090
external-ui: ui
geodata-mode: true
geo-auto-update: true
geo-update-interval: 24
geox-url:
  geoip: https://fastly.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@release/geoip-lite.dat
tun:
  auto-detect-interface: true
  auto-route: true
  device: Mihomo
  dns-hijack:
  - 0.0.0.0:53
  mtu: 1500
  stack: system
  strict-route: true
dns:
  enable: true
  listen: 0.0.0.0:53
  enhanced-mode: fake-ip
  fake-ip-range: 198.18.0.1/16
  fake-ip-filter:
  - '*.lan'
  - localhost.ptlogin2.qq.com
  - +.msftconnecttest.com
  - +.msftncsi.com
  nameserver:
  - system
proxy-providers:
  XXX:
    type: http
    url: "链接"
    path: ./XXX.yaml
    interval: 86400
proxy-groups:
- name: PROXY
  type: select
  use:
  - XXX
rule-providers:
  global:
    type: http
    path: ./global.yaml
    url: https://fastly.jsdelivr.net/gh/ACL4SSR/ACL4SSR@master/Clash/Providers/ProxyLite.yaml
    interval: 86400
    proxy: PROXY
    behavior: classical
    format: yaml
  china:
    type: http
    path: ./china.yaml
    url: https://fastly.jsdelivr.net/gh/ACL4SSR/ACL4SSR@master/Clash/Providers/ChinaDomain.yaml
    interval: 86400
    proxy: PROXY
    behavior: classical
    format: yaml
rules:
- GEOIP,private,DIRECT,no-resolve
- RULE-SET,global,PROXY,no-resolve
- RULE-SET,china,DIRECT,no-resolve
- GEOIP,cn,DIRECT
- MATCH,PROXY

浏览器：谷歌、GItHub打开都没问题。但SSH有问题：

ssh -T git@github.com
报错：kex_exchange_identification: Connection closed by remote host Connection closed by **198.18.0.12** port 22

可以排出22端口的问题（另一台电脑CFW同样的链接，SSH可以）。

同时发现：

nslookup github.com
返回：
Server:		8.8.8.8
Address:	8.8.8.8#53

Name:	github.com
Address: **198.18.0.12**

[liuyxiu]

补充：把TUN关掉可以SSH，但上不了外网。