Apache 2.4 SSL Config - Server rejects requests with HTTP 400

Question

I'm running into some trouble with my Apache 2.4 config. Accessing https://subdomain.my-domain.com always returns this http 400.

Bad Request Your browser sent a request that this server could not understand. Reason: You're speaking plain HTTP to an SSL-enabled server port. Instead use the HTTPS scheme to access this URL, please.

I'm accessing my site via https directly so there is no redirect from http to https involved. Below my apache config. I'm aware that I don't check the certificates for validity. Right now they're just self signed but that will change in the future.

##################################################################
###                                                            ###
###   Global Settings                                          ###
###                                                            ###
##################################################################

    DocumentRoot /var/ebc/apache2/www/htdocs
    <Location /fwcheck.html>
        <RequireAll>
            Require all granted
        </RequireAll>
    </Location>

##################################################################
###                                                            ###
###   Global SSL Settings                                      ###
###                                                            ###
##################################################################

    SSLProtocol             ALL -SSLv2 -SSLv3
    SSLProxyProtocol        ALL -SSLv2 -SSLv3
    SSLHonorCipherOrder     on
    SSLCipherSuite          ECDHE-RSA-AES128-SHA256:AES128-GCM-SHA256:HIGH:!MD5:!aNULL:!EDH
    SSLCompression          off
    SSLSessionTickets       off

    # OCSP Stapling, only in httpd 2.3.3 and later
    SSLUseStapling                      on
    SSLStaplingResponderTimeout         5
    SSLStaplingReturnResponderErrors    off
    SSLStaplingCache                    shmcb:/var/ebc/apache2/sslstaplingcache(128000)

##################################################################
###                                                            ###
###   Virtual Hosts                                            ###
###                                                            ###
##################################################################

<VirtualHost 10.173.144.43:80>
    ErrorLog /var/ebc/apache2/log/error.log
    CustomLog /var/ebc/apache2/log/access.log vhost_combined

    ##################################################################
    ###                                                            ###
    ###   Send everything to https except firewall check           ###
    ###   vhost config only for port 443 necessary.                ###
    ###   No further config for port 80.                           ###
    ###                                                            ###
    ##################################################################

        RewriteEngine On
        RewriteCond %{REQUEST_FILENAME} !fwcheck.html
        RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]

    ##################################################################
</VirtualHost>

<VirtualHost 10.173.144.43:443>
    ServerName subdomain.my-domain.com
    ErrorLog /var/ebc/apache2/log/error.log
    CustomLog /var/ebc/apache2/log/access.log vhost_combined

    ##################################################################
    ###                                                            ###
    ###   SSL Settings                                             ###
    ###                                                            ###
    ##################################################################

        RequestHeader set ClientProtocol HTTPS
        SSLEngine       On
        SSLProxyEngine  On

        SSLCertificateFile      /var/ebc/apache2/ssl/subdomain.my-domain.com.crt
        SSLCertificateKeyFile   /var/ebc/apache2/ssl/subdomain.my-domain.com.key
        SSLCACertificateFile    /var/ebc/apache2/ssl/subdomain.my-domain.com.crt

        ProxyRequests       off
        ProxyPreserveHost   on

        # Disable certificate checks
        SSLProxyCheckPeerCN off
        SSLProxyCheckPeerName off

        # HSTS (15768000 seconds = 6 months)
        Header always set Strict-Transport-Security "max-age=15768000"

    ##################################################################
    ###                                                            ###
    ###   Locations                                                ###
    ###                                                            ###
    ##################################################################

        DocumentRoot /var/ebc/apache2/www/htdocs/prod

        <Location />
            Options None
            <RequireAll>
                Require all granted
            </RequireAll>
        </Location>

        <Location /web-status>
            <RequireAll>
                Require all denied
            </RequireAll>
        </Location>

        <Location /balancer-manager>
            <RequireAll>
                Require all denied
            </RequireAll>
        </Location>

    ##################################################################
</VirtualHost>

I don't really have an idea why this does not work. Can anyone give me a hint?

Thanks in advance guys and regards Sebastian

Answer 1

Your connection does not arrive on interface 10.173.144.43:443 so it's not handled by your VirtualHost . It hits the main server configuration which does not have SSL enabled.

If you don't care what local interface is used, use a * in VirtualHost