[Synology] Basic NAS security

If after launching the following command, you see on your Synology NAS something like the above lines, you might apply these simple configuration security rules.

# echo -e “HEAD / HTTP/1.0\r\n\r\n” | nc -v localhost 80

HTTP/1.1 302 Found
Date: Fri, 21 Dec 2012 12:12:12 GMT
Server: Apache/6.1.12 (Unix) mod_ssl/4.8.13 OpenSSL/6.8.9h PHP/8.3.10 BruceWillisWillSaveMe/12.21.2012
X-Powered-By: PHP/8.3.10
Location: http://:31337/
Vary: Accept-Encoding
Connection: close
Content-Type: text/html

  1. ServerTokens

    First, edit at least (might affect other files) the following files:

    • conf/extra/httpd-default.conf-webdav
    • conf/extra/httpd-default.conf-sys
    • conf/extra/httpd-default.conf-user

     
    Replace (line 55 for my DSM version)

    ServerTokens Full

    by

    ServerTokens Prod

  2. ServerSignature

    Second, edit the same files and replace (line 65 for my DSM version)

    ServerSignature On

    by

    ServerSignature Off

  3. expose_php

    Third, edit the file /usr/syno/etc/php.ini and replace (line 436 for my DSM version)

    expose_php = On

    by

    expose_php = Off

  4. Disable admin account

    Create a new account (my_new_admin_account_you_wont_find) with administator privileges.
    Log in with this new administrator account.
    Disable the good old ‘admin’ account.

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