ssh with ssh-keygen

本地連到 server_hostname(如 10.123.123.11)
ssh-keygen -t rsa 或 ssh-keygen -d (dsa) => 產生出 id_rsa, id_rsa.pub
chmod 0600 id_rsa
scp -P 22 id_rsa.pub user@server_hostname:~/.ssh/authorized_keys
ssh -P user@server_hostname ls
 
注意: remote(hostname) 端如  /home/user/.ssh不存在
mkdir -p /home/user/.ssh 後, 記得執行
chmod 700 /home/user/.ssh
chmod 600 /home/user/authorized_keys
chmod 755 /home/user
chown user:user -R /home/user

authorized_keys 文件必须是600权限(也就是-rw——-)或者644
.ssh目录必须是700权限(也就是drwx——)
/home/work目录 必须是 755权限 即drwxr-xr-x

nginx revere proxy mssql 1433

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

stream {
    server {
        listen 1433;
        proxy_pass mssql:1433;
    }
}

Centos 7 SELinux 只允許 HTTP

查看模組(例如apache)
# semanage module -l
該模組的設定會放在 /etc/selinux/targeted/active/modules

查看埠號類型
# semanage port -l

和http有關的埠號
# semanage port -l | grep 'http'

把5353埠加入http_port_t的type中
# semanage port -a -t http_port_t -p tcp 5353

Docker nginx

docker exec -it proxy /bin/sh -c "[ -e /bin/bash ] && /bin/bash || /bin/sh"

#cd /etc/nginx/conf.d
#cat default.conf


#cd /usr/share/nginx/html/
#ls -l

#cd /var/log/nginx
#ls access.log
#ls error.log

Linux net tools

apt update
apt upgrade
apt install -y net-tools
ifconfig
apt install -y iputils-ping
apt install -y telnet

Nginx reverse proxy

upstream backend {
  server localhost:1080;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;
    listen 443 ssl default_server;
    listen [::]:443 ssl default_server;

    ssl_certificate     /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/private.key;
    ssl_dhparam /etc/nginx/ssl/dhparams.pem;

    ssl_session_cache shared:SSL:9m;
    ssl_session_cache shared:ssl_session_cache:10m;
    ssl_session_timeout 5m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
    ssl_stapling on;
    ssl_stapling_verify on;
    add_header X-Frame-Options "DENY";
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
    resolver 8.8.8.8 8.8.4.4 valid=300s;
    resolver_timeout 5s;
    location ~ /\.ht {
    deny all;
    }



    
    location / {
      root /usr/share/nginx/html;
      index index.html index.htm;
    }

    location /image/ {
       proxy_pass http://backend/;

       # 注意 /image及 http:/backend是沒作用的, 記得要用/image/及 http:/backend/ 才行

       # 定義 header 變數, 記錄使用者的 IP
       proxy_set_header X-Real-IP $remote_addr;
        
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

       proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
       proxy_max_temp_file_size 0;
    }

}

NGINX default.conf FreeSSL certificate.crt

cd /etc/nginx/ssl
openssl dhparam -out dhparams.pem 4096

cat certificate.crt > server.crt
echo -e "\n" >> server.crt
cat ca_bundle.crt >> server.crt

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;
    listen 443 ssl default_server;
    listen [::]:443 ssl default_server;

    ssl_certificate     /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/private.key;
    ssl_dhparam /etc/nginx/ssl/dhparams.pem;

    ssl_session_cache shared:SSL:9m;
    ssl_session_cache shared:ssl_session_cache:10m;
    ssl_session_timeout 5m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
    ssl_stapling on;
    ssl_stapling_verify on;
    add_header X-Frame-Options "DENY";
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
    resolver 8.8.8.8 8.8.4.4 valid=300s;
    resolver_timeout 5s;
    location ~ /\.ht {
    deny all;
    }
}