I would *highly* recommend that you pick either /towl or / and not try to
do both, unless you want to deploy the application twice (which is fine,
just deploy towl.war and ROOT.war as copies of each other). If you try to
re-write /towl to / or / to /towl, you'll find you spend the rest of your
days tracking-down edge-cases and "fixing" them -- likely making things
confusing and, probably, worse.
In the end our goal to makesure that the links are not always dead as soon
as the towl is moved to a new machine. Can you pelase assit me how to do
that?
The goal should be that "moving" the application only means changing DNS
and everything else works as expected.
If you:
1. Deploy the application with a single context (e.g. /towl, which I
recommend)
2. Re-direct / to /towl (this requires a reverse-proxy or a ROOT
application that does nothing but redirect ; my personal preference)
3. Do not define any <Host> other than "localhost" and make it the
default. Do not bother with any <Alias> elements since they are not
necessary.
Moving the application should only require that you:
4. Deploy the same application with the same configuration in the new
location
5. Change DNS to point example.lbg.com and server.lbg.com to the new
location of the service
Hope that helps,
-chris
On Tue, Apr 30, 2024 at 5:44 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Lavanya,
On 4/30/24 07:10, lavanya tech wrote:
Can you tell me how to do the below ? How should I setup Tomcat in
server.xml ?
If you want to use port 443 (the default port for HTTPS) then you will
need to change Tomcat to bind to port 443 (if that's allowed on your OS)
or arrange to have port 443 routed to port 8443. You may need additional
configuration in Tomcat (specifically: proxyPort) to avoid having Tomcat
generate URLs with ":8443" in them.
Looking forward to your reply.
If Tomcat is listening on port 8443 then you will need to include that
in your URL, period. If you want to allow URLs without a port number,
you will have to arrange to have something listening on port 443.
On Windows, Tomcat can listen directly on port 443. On UNIX and
UNIX-like systems, you won't be able to do this without running Tomcat
as root WHICH YOU ABSOLUTELY SHOULD NOT DO.
There are other ways to get port 443 working, but I'll need to know more
about your environment. The port issue is "easier" than figuring out
whatever is going on with your DNS, aliases, etc. so I would recommend
we fix one thing at a time.
-chris
On Mon, Apr 29, 2024 at 2:03 PM lavanya tech <lavanyatech...@gmail.com>
wrote:
Hi Chris,
There is no issues with browser, because I tested with different
browsers
and it all works fine. I am sure that there is no issue with the
certificate.
Because I was able to establish successful connections with port
8443, it
just doesnot work with out port
curl https://example.lbg.com/towl
curl: (56) Received HTTP code 504 from proxy after CONNECT
curl: (56) Received HTTP code 504 from proxy after CONNECT
If you want to use port 443 (the default port for HTTPS) then you will
need to change Tomcat to bind to port 443 (if that's allowed on your OS)
or arrange to have port 443 routed to port 8443. You may need additional
configuration in Tomcat (specifically: proxyPort) to avoid having Tomcat
generate URLs with ":8443" in them.
<Connector port="443" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
maxThreads="150"
scheme="https" secure="true" SSLEnabled="true"
keystoreFile="path_to_your_keystore_file"
keystorePass="your_keystore_password"
keystoreType="PKCS12"
clientAuth="false" sslProtocol="TLS"
proxyPort="443"/>
should i use connect port like the above ? But you mentioned before we
dont need any configuration changes. Please clarify I am not able to
figure
this out and I have this issue many days pending. How to make it work
with
port 8443 and with out port
Also I wanted to use weburl with alias name permanently instead of the
hostname. How can I achieve both
Thanks,
Lavanya
-->
On Fri, Apr 26, 2024 at 9:28 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Lavanya,
On 4/25/24 07:24, lavanya tech wrote:
Hi Chris,
One question / doubt:
As I mentioned earlier, the below URLS already working in the browser
https://server.lbg.com:8443/towl
https://example.lbg.com:8443/towl -> redirect ( which means when I
hit in
browser) it points to https://server.lbg.com:8443/towl ---> To be
frank,
even I donot need redirect here, not sure why it redirects.
My question is why its working even though SAN is not registered with
the
certificate ? It doesnot even throw warning in the browser.
I'm not sure. Is it possible you have dismissed this error in the past
and the browser is remembering that? Try this with a different web
browser or maybe with curl from the command-line to see what happens.
Why https://server.lbg.com/towl or https://example.lbg.com/towl -->
How it
should work with New SAN certificate ?
You don't need to worry about the port number or application name, only
the hostname is a part of the SAN.
-chris
On Thu, Apr 25, 2024 at 10:16 AM lavanya tech <
lavanyatech...@gmail.com
wrote:
Hi Chris,
Thanks I will request new certificate with SANs and I will try to fix
the
things from our end.
Best Regards,
Lavanya
On Wed, Apr 24, 2024 at 11:12 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Lavanya,
On 4/24/24 15:39, lavanya tech wrote:
Local host means the machine i am logged in to server.lbg.com
You are right, example.lbg.com is CNAME record.
Okay, thanks for clearing that up.
I dont have any SAN configured for the certificate. The certificate
is
requested for only server.lbg.com
You will never be able to make a secure request to anything other
than
server.lbg.com without seeing an error. I highly recommend adding
the
other hostname as a SAN to your certificate if you really want to
support this.
Even if you wanted https://example.lbg.com/whatever to return an
HTTP
302 redirect to https://server.lbg.com/whatever, the user would
see a
certificate hostname mismatch error which is ugly. It's best to make
it
work without users seeing ugly things.
So if i just request new certificate with SAN it should work ? If
yes, I
will request for it and follow your steps as below suggested.
Yes, it should.
Should i use CName record or DNS? Does it make difference?
CNAME *is* DNS.
Whenever possible, use hostnames and not IP addresses as SANs. It's
more
flexible that way, and users get to see hostnames instead of IP
addresses.
-chris
On Wednesday, April 24, 2024, Christopher Schultz <
ch...@christopherschultz.net> wrote:
Lavanya,
On 4/24/24 07:37, lavanya tech wrote:
Sorry I understood wrongly here with regards to my environment,
Let me
start from the beginning. I donot want to use redirect at all. I
simply
wanted to force apache tomcat to use both localhost and dns name
of
the
localhost via url.
When you say "force" what do you mean?
When you say "use both localhost and DNS name" what do you mean?
When you say "localhost" do you mean 127.0.0.1 or "the machine I'm
logged-into right now"?
I have DNS resollution as below.
server.lbg.com --> localhost
Is that a CNAME record?
nslookup server.lbg.com (localhost)
Name: server.lbg.com
Address: 192.168.100.20
alias: example.lbg.com
That's a weird DNS response. The DNS name "localhost" should
*always*
return 127.0.0.1 for IPv4 and ::1 for IPv6. It shouldn't return
191.168.100.20.
We have working the below urls working:
https://server.lbg.com:8443/towl
https://example.lbg.com:8443/towl --> redirects to
What do you mean "redirect"? Does it return a 30x response that
causes
the
browser to make a new request to \/
https://server.lbg.com:8443/towl --> still works --> we have SSL
configured for the same but this SSL certificate doesnot have
additional
DNS setup.
What SANs are in your certificate? How many certificates do you
have?
But I would need to somehow access https://example.lbg.com -->
which
means
I would need to access via 443 here ?
I'm so confused. What needs to access what?
I tried to adding the below to server.xml as below, but that
doesnot
seems
to work.
<Connector port="80"
protocol="org.apache.coyote.http11.Http11NioProtocol"
connectionTimeout="20000"
redirectPort="443" />
This will only redirect (HTTP 302) requests to
http://yourhost/anything
to https://yourhost/anything *if the application specifically
requests
CONFIDENTIAL transport*. It doesn't just redirect everything by
default. If
you want it to redirect everything, you'll need to set that up
e.g.
using
RewriteValve. There are other options, too.
Do i need additional SSL certificate for the
https://example.lbg.com
to
make it work ?
If you don't want your browser to complain, you will need at least
one
TLS
certificate that contains every Subject Alternative Name (SAN) for
every
possible hostname you expect to use with this service. You ca do
it
with
multiple certificates as well, but a single cert with multiple
SANs
is
less
work.
Do i need to set up an additional web server for this like apache
or
nginx
for redirecting requests?
No.
Please stop saying "redirect" because it sounds like you almost
never
mean
"HTTP 30x redirect" and that's confusing everything.
I *think* you only need the following:
1. A TLS certificate with the following SANs:
* server.lbg.com
* example.lbg.com
* localhost (you shouldn't do this)
2. DNS configured for all hostnames:
* server.lbg.com -> A 192.168.100.20
* example.lgb.com -> A 192.168.100.20
3. Tomcat configured with a single <Host> which is the default
virtual
host. Note that this is the *default Tomcat configuration* and
doesn't
need
to be changed from the default.
4. Tomcat configured with your certificate like this:
<Connector ...
SSLEnabled="true">
<SSLHostConfig>
<Certificate
certificateFile="/path/to/your/cert.crt"
certificateKeyFile="/path/to/your/key.pem" />
<!-- You may need certificateKeyPassword in
<Certificate>
-->
</SSLHostConfig>
</Connector>
If your SANs are configured properly, this should allow you to
connect
using any of these URLs:
$ curl https://server.lbg.com/towl/login.jsp
(returns login page)
$ curl https://example.lbg.com/towl/login.jsp
(returns login page)
If your application's web.xml contains something like this:
<security-constraint>
<web-resource-collection>
<web-resource-name>theapp</web-resource-name>
<url-pattern>/*</url-pattern>
</web-resource-collection>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
... then these URLs insecure HTTP URLs should redirect your
clients:
$ curl http://server.lbg.com/towl/login.jsp
(returns HTTP 302 redirect to
https://server.lbg.com/towl/login.jsp
)
$ curl https://server.lbg.com/towl/login.jsp
(returns HTTP 302 redirect to
https://example.lbg.com/towl/login.jsp)
I don't think you need any use of the RewriteValve unless you want
to
handle sending HTTP 302 redirect responses to insecure requests
without
specifying the CONFIDENTIAL transport-guarantee in your
application's
web.xml file. But I don't see any reason NOT to have that in
there.
-chris
On Tue, Apr 23, 2024 at 10:52 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Lavanya,
On 4/22/24 05:21, lavanya tech wrote:
Could you please explain, what you exactly mean ? So here
redirect
is
not a
solution right ?
Redirecting is fine.
Perhaps you should take a step back and decide: what do you
actually
want, here? You might be trying to solve problem X by applying
solution
Y, and you've already decided that solution Y is correct so you
are
trying to get help with that.
Perhaps ask for help with Problem X?
For example, "I don't want users to have to type the name of my
application to reach it so I want example.com/ to go to my
application
instead of example.com/myapp/".
Or, "I have multiple domains and I want all of them to redirect
to
the
canonical domain example.com and to go to me web application
/myapp
so
everything goes to example.com/myapp/".
"You'd have to use a glob/regex if
you wanted to check for [anything and maybe nothing.]
example.com
."
There is nothing in your configuration or question that suggests
that
the hostname in the request is relevant, but you are making it a
*requirement* that the request contains a specific Host header.
IF
you
don't actually need that, why do you have it?
-chris
On Fri, Apr 19, 2024 at 3:03 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Ammu,
On 4/19/24 08:32, lavanya tech wrote:
Thank you very much. I removed <Host> for example.com as
well
as
adding
an
<Alias> in server.xml
I copied context.xml file
/git/app/apache-tomcat-10.1.11/webapps/towl/META-INF/context.xml
Removed < in rewrite.config files.
But still I dont redirect the URL.
If you have <Context> in server.xml and also your application
in
the
webapps/ directory, then you will be double-deploying your
application.
Re-name /git/app/apache-tomcat-10.1.11/webapps/towl/ to be
/git/app/apache-tomcat-10.1.11/webapps/ROOT (the capitals are
important)
and remove the <Context> element from your server.xml.
Then start your server and read the logs.
*nslookup alias.example.com <http://alias.example.com>
gives-->Non-authoritative answer:Name: www.example.com
<http://www.example.com>Address: 192.168.200.10Aliases:
alias.example.com
<http://alias.example.com>*
Just to give some information here, *www.example.com
<http://www.example.com>* has alias* "alias.example.com
<http://alias.example.com>"*
But https://www.example.com:7777/example --> works fine with
out
issues
but
the alias doesnot works (https://alias.example.com)
So i am not sure if the redirect url helps or if its correct
Your rewrite configuration says that you have to be using host
"example.com" but your request goes to www.example.com. Your
configuration should only redirect a request such as:
$ curl -v http://example.com:7777/something
HTTP/1.1 301 Moved Permanently
...
Location: https://www.example.com:7777/example
If you make a request like:
$ curl -v http://www.example.com:7777/something
I wouldn't expect a redirect because of your "host" condition.
The
"%{HTTP_HOST} example.com" looks at the entire Host header
and
not
just
anything that ends in "example.com". You'd have to use a
glob/regex if
you wanted to check for [anything and maybe nothing.]
example.com.
You'd also have to make sure that your application is serving
responses
to requests to / which is why I'm recommending you use the
ROOT
web
application name instead of "towl".
-chris
On Fri, Apr 19, 2024 at 1:21 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
Ammu,
On 4/18/24 09:34, lavanya tech wrote:
I am attaching server.xml and context.xml and
rewrite.config
files.
The paths are
/git/app/apache-tomcat-10.1.11/webapps/towl/context.xml
<Context>
<Valve
className="org.apache.catalina.valves.rewrite.RewriteValve"
/>
<!-- Other context configuration -->
</Context>
This file ^^^ is in the wrong place. It should be in
/git/app/apache-tomcat-10.1.11/webapps/towl/META-INF/context.xml
/git/app/apache-tomcat-10.1.11/webapps/towl/WEB-INF/rewrite.config
<RewriteCond %{HTTP_HOST} example.com [NC]
<RewriteRule ^/(.*)$ https://www.example.com:7777/example
[R=301,L]
Why do you have < symbols at the beginning of these lines?
server.xml
> [...]
<Host name="example.com" appBase="webapps"
unpackWARs="true"
autoDeploy="true">
<Context path="" docBase="towl" />
It's best not to define any <Context> in server.xml. I would
remove
this
<Context> entirely and allow Tomcat to auto-reploy from your
webapps/towl directory. If you need this application to be
deployed
as
the ROOT context (on / and not /towl) then you should
re-name
/git/app/apache-tomcat-10.1.11/webapps/towl to
/git/app/apache-tomcat-10.1.11/webapps/ROOT
You also don't need a <Host> for example.com as well as
adding
an
<Alias> for the same domain (though this is probably to
anonymize the
