找了个时间优化了服务器便利性和“安全性”
1. Termius访问
Termius生成三个密钥分配给三台服务器
export到~/.ssh/authorized_keys
检查authorized_keys内容正确
测试密钥&无密码登录
2. 配置ufw
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow http
sudo ufw allow https
sudo ufw allow 特殊端口/tcp
sudo ufw enable
sudo ufw status verbose
3. 配置fail2ban
sudo nano /etc/fail2ban/jail.local
[DEFAULT]
bantime = 1h
findtime = 10m
maxretry = 5
banaction = ufw
ignoreip = 127.0.0.1/8 ::1 X Y Z
[sshd]
enabled = true
port = 特殊端口
backend = systemd
sudo apt update && sudo apt install python3-systemd -y
sudo systemctl enable --now fail2ban
sudo systemctl restart fail2ban
sudo fail2ban-client status sshd
3. 配置sshd_config
sudo nano /etc/ssh/sshd_config
Port 特殊端口
PermitRootLogin no
PubkeyAuthentication yes
PasswordAuthentication no
sudo sshd -t
sudo systemctl restart ssh
4. 更改hostname
sudo hostnamectl set-hostname xxx
sudo nano /etc/hosts
修改127.0.1.1 后主机名为xxx
hostnamectl status
5. 配置互通
ssh-keygen -t ed25519 -C "from_$(hostname)" -N "" -f ~/.ssh/id_ed25519
cat id_ed25519.pub
nano ~/.ssh/authorized_keys
一共三行，Termius pub、其他两台服务器的pub
6. 配置Alias
nano ~/.bashrc
alias nc='ssh -p 特殊端口 jay@ipX'
alias cc='ssh -p 特殊端口 jay@ipY'
alias hd='ssh -p 特殊端口 jay@ipZ'
source ~/.bashrc
nc (netcup)
cc (clawcloud)
hd (hostdzire)
或者
nano ~/.ssh/config
Host nc
HostName X
Port 特殊端口
User jay
Host cc
HostName Y
Port 特殊端口
User jay
Host hd
HostName Z
Port 特殊端口
User jay
ssh nc
ssh cc
ssh hd
还可以加上“ProxyJump cc”连 xxx 之前先跳到 cc
#ssh #sshd #pub #alias #ProxyJump #authorized_keys #termius #ufw #fail2ban
