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sshのポート設定 - Ubuntu Server 18.04 LTS

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はじめに

sshのポートを設定する。ファイアウォールに注意。

手順

1: SSH設定ファイルのコピー編集

sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.default

2: /etc/servicesで空いている番号を選択

NNNNN

3: /etc/ssh/sshd_configを編集

#Port 22
Port NNNNN

4: ssh.confのチェック

$ sshd -t

5: sshdの再起動

$ sudo systemctl restart sshd.service

6: ssh再接続

22番ポート指定でログインできなければOK
$ ssh -p 22 hoge@NNN.NNN.NNN.NNN

NNNNN番ポート指定でログインできればOK
$ ssh -p NNNNN hoge@NNN.NNN.NNN.NNN

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