Questions[custom-errors](server)

I have Kerberos-based authentication with Apache/2.2.3 (Linux/SUSE). When user is trying to open some url, browser ask him about domain login and password like in HTTP Basic Auth. If user cancel such request 3 times Apache returns 401 Authorization Required error page. My current virtual host config is

    <Directory /home/user/www/current/public/>
            Options -MultiViews +FollowSymLinks
            AllowOverride None
            Order allow,deny
            Allow from all
            AuthType Kerberos
            AuthName "Domain login"
            KrbAuthRealms DOMAIN.COM
            KrbMethodK5Passwd On
            Krb5KeyTab /etc/httpd/httpd.keytab
            require valid-user
    </Directory>

I want to set nice custom 401 error page with some instructions for users. And I added such line in virtual host config:

 ErrorDocument 401 /pages/401

It works, when user can't authorize apache redirects him to my nice page. But Apache doesn't ask user login\password as it did before. I want this functionality and nice error page simultaneously!

Is it possible to make it works properly?

I have a reverse proxy Apache that is moving the request to a Tomcat servlet. The configuration on the Virtual Host in Apache is:

<VirtualHost 10.10.10.10:80>
ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
ProxyPassReverse /Site1/ServLet1 http://1.1.1.1//Site1/ServLet1

ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site1/ServLet1
</VirtualHost>

Essentially, if it comes to 10.10.10.10 and requests /Site1/ServLet1, route it to /Site1/ServLet1.

if I add

<VirtualHost 10.10.10.10:80>
ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
ProxyPassReverse /Site1/ServLet1 http://1.1.1.1//Site1/ServLet1
ErrorDocument 404 /customerrors/site1/404.html

ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site1/ServLet1
</VirtualHost>

so it will show a custom error for site1 (I set the ErrorDocument), it will be served to both.

How can I have a different 404 error page per site maintaining this kind of configuration?

Thank

Edit:

if I modify the configuration based on the comments below like:

<Location /Site1/ServLet1/>
ProxyPass http://1.1.1.1/Site1/ServLet1
ProxyPassReverse http://1.1.1.1/Site1/ServLet1
ErrorDocument 404 /customerrors/site1/404.html
</Location>

Then I can still get to http://1.1.1.1/Site1/ServLet1 but no error page is displayed whatsoever

I'm trying to return a custom 400 error page for non-HTTPS requests in nginx. I'm new to nginx, but I've read many pages of examples on custom error pages and nothing seems to work for me. My config:

server {
    listen 80;

    error_page 400 /400.html;
    location = /400.html {
        root /var/www/html;
    }

    return 400;
}

The return is working, because if I change the code (e.g. to 401 or 500) I get the appropriate default nginx error page. I know that the file exists, because if I take out the return it will serve my 400.html page directly with no problems. But nothing I've tried has resulted in my custom page showing up when I return the error code.

What am I missing?

Update: Other variants I've tried to no avail:

server {
    listen 80;

    error_page 400 /400.html;
    location = /400.html {
        root /var/www/html;
    }

    return 400;
}

server {
    listen 80;

    root /var/www/html;

    error_page 400 /400.html;
    location = /400.html {
        allow all;
    }

    return 400;
}

server {
    listen 80;

    root /var/www/html;
    error_page 400 /400.html;

    return 400;
}

Is there any way to prevent IIS from automatically overriding the output of a web app that is returning a status code in the 500 or 400 range?

Just as an example, in ColdFusion I can create the following page:

<cfheader statuscode="500" statustext="Error">
Sorry, an error occurred.

The behavior should be that I see a page that says "Sorry, an error occurred." and see in the headers that the status code is 500.

Instead, I see:

Server Error
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

In lovely IIS styling.

I tried just deleting the 500 custom status page but that simply resulted in:

The page cannot be displayed because an internal server error has occurred.

Without any of the lovely styling.

Looks like this happens with any page that returns a code that is not in the 200 or 300 range.

I'm running an Apache Tomcat server with 2 custom servlets. The tree structure looks like:

$CATALINA_HOME/webapps/
         ROOT/
           WEB-INF/
         servlet1/
           META-INF/
           WEB-INF/
         servlet2/
           META-INF/
           WEB-INF/

I am trying to add a custom error html page for each servlet that will be displayed on error 400, 404 and when there is an exception on the servlet (such as the information that was supposed to be sent to the servlet on the http request is not there)

I added to $CATALINA_HOME/webapps/servlet1/WEB-INF/web.xml

 <error-page>
   <error-code>400</error-code>
   <location>/error.html</location>
 </error-page>
 <error-page>
   <error-code>404</error-code>
   <location>/error.html</location>
 </error-page>
 <error-page>
   <exception-type>java.lang.Throwable</exception-type>
   <location>/error.html</location>
 </error-page>

and I created error.html in $CATALINA_HOME/webapps/ROOT/. This doesn't seem to be working. When I type" www.server.com/servlet1/SomRandomStuff to get a 404, a blank page is displayed, not error.html. Something else happens when I call the servlet without passing the correct info to it, the browser will ask me if i want to download a file.
I've tried placing error.html not on ROOT but on the servlet1 directory. Didn't work. I checked that error.html has the correct permissions, it is OK. I am out of ideas and the few tutorials I found online are very vague.

What am I doing wrong? How do I achieve this - display a custom error page per servlet?

Thank you for the help.