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From Richard Mixon <rnmi...@custco.biz>
Subject [users@httpd] Re: Preventing an open proxy with both a single SSL virtual host and a non-SSL virtual host
Date Fri, 14 Feb 2014 03:51:22 GMT
Surely this is not that unusual a configuration - no? Do I maybe need a
"default.only" type virtual host on the port 443 side too?

Thanks again - Richard


On Thu, Feb 13, 2014 at 12:16 AM, Richard Mixon <rnmixon@custco.biz> wrote:

> We've setup a new Apache server on Centos 6.4, httpd 2.2.15.
>
> The site is running SSL with a single Wordpress virtual host. We do use
> mod_proxy to forward some requests to back-end systems our CAS
> authentication system and a couple of other back-end systems we need a
> limited amount of content from. We've done this often in the past, but this
> configuration is a bit different.
>
> All was fine until we created a simple (additional) virtual host on port
> 80 for the sole purpose of redirecting users that forgot to type in the
> https in the url. After that we started getting flooded with requests such
> as the following:
>
> 64.120.77.151 - - [13/Feb/2014:00:03:05 -0700] "GET
> http://ads.yahoo.com/st?ad_type=iframe&ad_size=160x600&section=4660128&pub_url=${PUB_URL}HTTP/1.0"
403 283 "
> http://creditsxchange.com/index.php/hotdeal/5536-the-times-of-india"
> "Mozilla/5.0 (Windows NT 7.1) AppleWebKit/534.30 (KHTML, like Gecko)
> Chrome/12.0.742.112 Safari/534.30"
>
> We shut the port 80 virtual host down and everything was returned to
> normal and we started looking for a solution. We came across what appeared
> to be a couple of excellent articles that addressed the problem:
>
> 1) The "Why do I see requests for other sites appearing in my log files?"
> section at http://wiki.apache.org/httpd/FAQ
>
> 2) The solution on this posting
> http://serverfault.com/questions/283200/my-virtualhosts-overlap-and-my-namevirtualhost-has-no-virtualhosts
>
> Well what seemed a nice clear solution has not worked so well. I'm
> thinking it is because we have both a single SSL virtual host and a (now
> two) non-SSL host.
>
> Our main httpd.conf file contains:
>   ...
>   ## ***************
>   #Listen 80
>   Listen 443
>   ## ***************
>   ...
>   NameVirtualHost *:80
>   NameVirtualHost *:443
>   ...
>   Include conf/VirtualHost.d/*.conf
>
> then we have what is now a single Virtual Host config file - but was
> originally three (01-vhost.conf, 02-vhost.conf and 03-vhost.conf), I
> combined them thinking the ordering might not be correct.
>
> Anyway here's the content of the Virtual hosts config:
>
> # Purpose is to prevent open proxy configuration.
> # This Virtual Host config must be named so it appears first,
> # i.e. 00-default.only.conf
> <VirtualHost *:80>
>     ServerName default.only
>     ErrorLog logs/default.only-error_log
>     CustomLog logs/default.only-access_log combined
>     <Location />
>       Order allow,deny
>       Deny from all
>     </Location>
> </VirtualHost>
>
> # This is the virtual host we really need on port 80
> <VirtualHost *:80>
>     ServerAdmin RNMixon@CustCo.biz
>     DocumentRoot /var/www/community.acmeinc.com
>     ServerName community.acmeinc.com
>     ErrorLog logs/community.acmeinc.com-error_log
>     CustomLog logs/community.acmeinc.com-access_log combined
>
>     ProxyRequests Off
>     ProxyPreserveHost Off
>
>     RewriteCond %{HTTP_HOST} ^community\.acmeinc\.com [NC]
>     RewriteRule / https://community.acmeinc.com/ [L,R,NE]
>
> </VirtualHost>
>
> # This is the main real virtual host
> <VirtualHost *:443>
>     ServerAdmin RNMixon@CustCo.biz
>     ServerName community.acmeinc.com
>     ErrorLog logs/community.acmeinc.com.ssl-error_log
>     CustomLog logs/community.acmeinc.com.ssl-access_log combined
>
>         SSLEngine on
>         SSLProtocol all -SSLv2
>         SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
>         SSLCertificateFile /etc/pki/tls/certs/community_acmeinc_com.crt
>         SSLCertificateKeyFile
> /etc/pki/tls/private/community.acmeinc.com.key
>         SSLCertificateChainFile
> /etc/pki/tls/certs/community_acmeinc_com.ca-bundle
>         SSLProxyEngine On
>         SSLProxyCACertificateFile /etc/tomcat7/tomcat-server.pem
>
>     ProxyRequests On
>     ProxyPreserveHost On
>
>     <Location /cas/>
>       ProxyPass https://community.acmeinc.local:8443/cas/
>       ProxyPassReverse https://community.acmeinc.local:8443/cas/
>     </Location>
>
>     <Proxy https://community.acmeinc.local:8443/cas/>
>       AllowOverride None
>       Order allow,deny
>       Allow from All
>     </Proxy>
>
>     <Location /TicketSales/>
>       ProxyPass http://www.acmeinc.local/TicketSales/
>       ProxyPassReverse http://www.acmeinc.local/TicketSales/
>     </Location>
>
>     <Proxy http://www.acmeinc.local/TicketSales/>
>       AllowOverride None
>       Order allow,deny
>       Allow from All
>     </Proxy>
>
>     <Location /rhythm/>
>       ProxyPass https://community.acmeinc.local:8443/rhythm/
>       ProxyPassReverse https://community.acmeinc.local:8443/rhythm/
>     </Location>
>
>     <Proxy https://community.acmeinc.local:8443/rhythm/>
>       AllowOverride None
>       Order allow,deny
>       Allow from All
>     </Proxy>
>
>     DocumentRoot /var/www/community.acmeinc.com
>     <Directory /var/www/community.acmeinc.com>
>         Options Indexes FollowSymLinks MultiViews
>         AllowOverride all
>         Order allow,deny
>         allow from all
>     </Directory>
>
> </VirtualHost>
>
> Problem - if we uncomment the "Listen 80" directive to let the port 80
> virtual hosts work, we become an open proxy again.
>
> Here is the output from a dump of the virtual host config:
>
> /usr/sbin/httpd -t -D DUMP_VHOSTS
> VirtualHost configuration:
> wildcard NameVirtualHosts and _default_ servers:
> *:443                  is a NameVirtualHost
>          default server community.acmeinc.com(/etc/httpd/conf/VirtualHost.d/01-community.acmeinc.com.conf:30)
>          port 443 namevhost community.acmeinc.com(/etc/httpd/conf/VirtualHost.d/01-community.acmeinc.com.conf:30)
> *:80                   is a NameVirtualHost
>          default server default.only
> (/etc/httpd/conf/VirtualHost.d/01-community.acmeinc.com.conf:4)
>          port 80 namevhost default.only
> (/etc/httpd/conf/VirtualHost.d/01-community.acmeinc.com.conf:4)
>          port 80 namevhost community.acmeinc.com(/etc/httpd/conf/VirtualHost.d/01-community.acmeinc.com.conf:15)
> Syntax OK
>
> What am I missing? Any help or hints is greatly appreciated.
>
> Thank you -
>
>
> --
> Richard Mixon
> Custom Computer Creations, L.L.C.
> mobile: (480) 577-6834 office: (480) 614-3442
> email: rnmixon@CustCo.biz <mailto:rnmixon@CustCo.biz>
> Microsoft Partner ID: 1263725
> The messages and documents transmitted with this notice contain
> confidential information belonging to the sender. If you are not the
> intended recipient of this information, you are hereby notified that any
> disclosure, copying, distribution or use of the information is strictly
> prohibited. If you have received this transmission in error, please notify
> the sender immediately.
>



-- 
Richard Mixon
Custom Computer Creations, L.L.C.
mobile: (480) 577-6834 office: (480) 614-3442
email: rnmixon@CustCo.biz <mailto:rnmixon@CustCo.biz>
Microsoft Partner ID: 1263725
The messages and documents transmitted with this notice contain
confidential information belonging to the sender. If you are not the
intended recipient of this information, you are hereby notified that any
disclosure, copying, distribution or use of the information is strictly
prohibited. If you have received this transmission in error, please notify
the sender immediately.

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