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SSHでセキュリティよくする。

Last updated at Posted at 2017-10-30

#sshでrsa認証する
###rootユーザでログインしてると、とてもまずいので別のユーザーを作成します。
userのところは変えてください。

bash
adduser user
usermod -G sudo user
su user
mkdir ~/.ssh

###MACで鍵を作成する。

bash
mkdir ~/.ssh
cd ~/.ssh
ssh-keygen -t rsa

###公開鍵を送信する。

bash
scp id_rsa.pub user@123:45:67:89:/home/user/.ssh

###SSHのポートを変更すると相手から、接続しづらくなります。

bash
sudo nano /etc/ssh/sshd_config
/etc/ssh/sshd_config
port 10022       #好きな番号で

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile      %h/.ssh/id_rsa.pub

PasswordAuthentication no
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