Hardening guide for Nginx 0.7.65 on RedHat 5.4 (64bit edition)

  1. Login to the server using Root account.
  2. Create a new account:
    groupadd nginx
    useradd -g nginx -d /dev/null -s /sbin/nologin nginx
  3. Mount RHEL 5.4 DVD, and move to the RPM folder:
    mount /dev/hdc /media
    cd /media/Server
  4. Before compiling the Nginx environment, install the following RPM:
    rpm -ivh kernel-headers-2.6.18-164.el5.x86_64.rpm
    rpm -ivh glibc-headers-2.5-42.x86_64.rpm
    rpm -ivh glibc-devel-2.5-42.x86_64.rpm
    rpm -ivh gmp-4.1.4-10.el5.x86_64.rpm
    rpm -ivh libgomp-4.4.0-6.el5.x86_64.rpm
    rpm -ivh gcc-4.1.2-46.el5.x86_64.rpm
    rpm -ivh pcre-devel-6.6-2.el5_1.7.x86_64.rpm
    rpm -ivh e2fsprogs-devel-1.39-23.el5.x86_64.rpm
    rpm -ivh keyutils-libs-devel-1.2-1.el5.x86_64.rpm
    rpm -ivh libsepol-devel-1.15.2-2.el5.x86_64.rpm
    rpm -ivh libselinux-devel-1.33.4-5.5.el5.x86_64.rpm
    rpm -ivh krb5-devel-1.6.1-36.el5.x86_64.rpm
    rpm -ivh zlib-devel-1.2.3-3.x86_64.rpm
    rpm -ivh openssl-devel-0.9.8e-12.el5.x86_64.rpm
  5. Download Nginx 0.7.65 from:
    http://wiki.nginx.org/NginxInstall
  6. Copy the Nginx 0.7.65 source files using PSCP (or SCP) into /tmp
  7. Move to /tmp
    cd /tmp
  8. Extract the nginx-0.7.65.tar.gz file:
    tar -zxvf nginx-0.7.65.tar.gz
  9. Move to the Nginx source folder:
    cd /tmp/nginx-0.7.65
  10. Edit using VI, the file /tmp/nginx-0.7.65/src/http/ngx_http_header_filter_module.c and replace the following section, from:
    static char ngx_http_server_string[] = "Server: nginx" CRLF;
    static char ngx_http_server_full_string[] = "Server: " NGINX_VER CRLF;
    To:
    static char ngx_http_server_string[] = "Server: Secure Web Server" CRLF;
    static char ngx_http_server_full_string[] = "Server: Secure Web Server" CRLF;
  11. Run the commands bellow to compile the Nginx environment:
    ./configure --with-http_ssl_module --without-http_autoindex_module --without-http_ssi_module

    make

    make install

  12. Remove the Nginx source files:
    rm -rf /tmp/nginx-0.7.65
    rm -f /tmp/nginx-0.7.65.tar.gz
  13. Remove Default Content
    rm -rf /usr/local/nginx/html
  14. Updating Ownership and Permissions on Nginx folders:
    chown -R root:root /usr/local/nginx
    chmod 750 /usr/local/nginx/sbin/nginx
    chmod -R 640 /usr/local/nginx/conf
    chmod -R 770 /usr/local/nginx/logs
  15. Create folder for the web content:
    mkdir -p /www
  16. Updating Ownership and Permissions on the web content folder:
    chown -R root /www
    chmod -R 775 /www
  17. Edit using VI the file /usr/local/nginx/conf/nginx.conf and change the following settings:
    From:
    #user nobody;To:
    user nginx nginx;

    From:
    #error_log logs/error.log notice;To:
    error_log logs/error.log notice;

    From:
    server_name localhost;To:
    server_name Server_FQDN;

    From:
    root html;To:
    root /www;

  18. Add the following sections to the end of the /usr/local/nginx/conf/nginx.conf file:
    server_tokens off;
    client_body_buffer_size 1K;
    client_header_buffer_size 1k;
    client_max_body_size 1k;
    large_client_header_buffers 2 1k;
    client_body_timeout 10;
    client_header_timeout 10;
    send_timeout 10;
  19. Create using VI, the file /etc/init.d/nginx with the following content:
    #!/bin/sh
    #
    # nginx - this script starts and stops the nginx daemon
    #
    # chkconfig: - 85 15
    # description: Nginx is an HTTP(S) server, HTTP(S) reverse \
    # proxy and IMAP/POP3 proxy server
    # processname: nginx
    # config: /etc/nginx/nginx.conf
    # config: /etc/sysconfig/nginx
    # pidfile: /var/run/nginx.pid

    # Source function library.
    . /etc/rc.d/init.d/functions

    # Source networking configuration.
    . /etc/sysconfig/network

    # Check that networking is up.
    [ "$NETWORKING" = "no" ] && exit 0

    nginx="/usr/local/nginx/sbin/nginx"
    prog=$(basename $nginx)

    NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf"

    [ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx

    lockfile=/var/lock/subsys/nginx

    start() {
    [ -x $nginx ] exit 5
    [ -f $NGINX_CONF_FILE ] exit 6
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
    }

    stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
    }

    restart() {
    configtest return $?
    stop
    sleep 1
    start
    }

    reload() {
    configtest return $?
    echo -n $"Reloading $prog: "
    killproc $nginx -HUP
    RETVAL=$?
    echo
    }

    force_reload() {
    restart
    }

    configtest() {
    $nginx -t -c $NGINX_CONF_FILE
    }

    rh_status() {
    status $prog
    }

    rh_status_q() {
    rh_status >/dev/null 2>&1
    }

    case "$1" in
    start)
    rh_status_q && exit 0
    $1
    ;;
    stop)
    rh_status_q exit 0
    $1
    ;;
    restartconfigtest)
    $1
    ;;
    reload)
    rh_status_q exit 7
    $1
    ;;
    force-reload)
    force_reload
    ;;
    status)
    rh_status
    ;;
    condrestarttry-restart)
    rh_status_q exit 0
    ;;
    *)
    echo $"Usage: $0 {startstopstatusrestartcondrestarttry-restartreloadforce-reloadconfigtest}"
    exit 2
    esac

  20. Change the permissions of the file /etc/init.d/nginx
    chmod +x /etc/init.d/nginx
  21. To start Nginx service at server start-up, run the command:
    chkconfig nginx on
  22. To manually start the Nginx service, use the command:
    /etc/init.d/nginx start
  23. Uninstall the following RPM:
    rpm -e gcc-4.1.2-46.el5
    rpm -e libgomp-4.4.0-6.el5
    rpm -e gmp-4.1.4-10.el5
    rpm -e glibc-devel-2.5-42
    rpm -e glibc-headers-2.5-42
    rpm -e kernel-headers-2.6.18-164.el5

2 Responses to “Hardening guide for Nginx 0.7.65 on RedHat 5.4 (64bit edition)”

Leave a Reply

Search This Blog
Labels
NetworkedBlogs