##やりたいこと
○Ubuntuに外部からMacを通してアクセスする.
##環境
○Ubuntu 18.04 LTS
○MacBook Pro 2018 Mojave
$ nmap [global_IP] Starting Nmap 7.70 ( https://nmap.org ) at 2019-02-13 20:16 JST Nmap scan report for p18235-ipngn2701sapodori.hokkaido.ocn.ne.jp ([global_IP]) Host is up (0.0029s latency). Not shown: 996 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http 554/tcp open rtsp 2869/tcp open icslap Nmap done: 1 IP address (1 host up) scanned in 1.94 seconds
##エラー内容
$ ssh [hostname]@[global_IP] ssh: connect to host [global_IP] port 22: Connection refused
$ ssh -p 80 [hostname]@[global_IP] ssh_exchange_identification: Connection closed by remote host
##やったこと
○/etc/hosts.allowの設定(sshd:ALLまで試した)
○rm /.ssh/known_hosts
##追記
○sudo ufw allow 22
Host is up (0.0026s latency). Not shown: 996 closed ports PORT STATE SERVICE 53/tcp open domain 80/tcp open http 554/tcp open rtsp 2869/tcp open icslap Nmap done: 1 IP address (1 host up) scanned in 1.66 seconds
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