remove server header tomcat - http-headers

Question

I am able to rename the value of org.apache.coyote.http11.Http11Protocol.SERVER to anything else, so the HTTP-Response-Header contains something like:
Server:Apache
instead of the default
Server:Apache-Coyote/1.1
Using a empty value for org.apache.coyote.http11.Http11Protocol.SERVER does not remove the Server-Header.
How can I remove the Server-Header from my responses?

Answer 1

You can modify your tomcat server.xml and add a "server" option and set it to whatever you want. The server option should be set for any http or ssl connectors that you have running. For example, below is a sample HTTP Connector configuration from an example server.xml file
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" enableLookups="false" xpoweredby="false" server="Web"/>

Answer 2

Short answer - you can't remove the header, but you should modify it (see other answers).
The server header is defined in the RFC and it is mandatory. (not defined as optional in the spec)
Taken from http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.38
14.38 Server
The Server response-header field contains information about the software used by the origin server to handle the request.
The field can contain multiple product tokens (section 3.8) and
comments identifying the server and any significant subproducts. The
product tokens are listed in order of their significance for
identifying the application.
If the response is being forwarded through a proxy, the proxy application MUST NOT modify the Server
response-header. Instead, it SHOULD include a Via field (as described
in section 14.45).
Note: Revealing the specific software version of the server might
allow the server machine to become more vulnerable to attacks
against software that is known to contain security holes. Server
implementors are encouraged to make this field a configurable
option.

Answer 3

It should be possible since Tomcat 5.5. Check out this discussion: https://mail-archives.apache.org/mod_mbox/tomcat-users/200508.mbox/%3C42FBE8AA.1060401#joedog.org%3E
and this link:
https://tomcat.apache.org/tomcat-4.1-doc/config/coyote.html
Accordingly the following should set the server header to TEST. Empty should make it empty.
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector" port="8180" inProcessors="5" maxProcessors="75" enableLookups="true" acceptCount="10" debug="0" connectionTimeout="20000" useURIValidationHack="false" server="TEST"/>
Setting the Server header to Apache should security-wise be good enough in most cases. Just from that it won't be possible to infer which OS nor which exact version with which modules and the versions of the modules running.

Answer 4

if you are using embedded tomcat then you can try below code.
import org.apache.catalina.startup.Tomcat;
final Tomcat server = new Tomcat();
server.getConnector().setXpoweredBy(false);
server.getConnector().setAttribute("server", "");

Answer 5

For Web application.
Set Server header from the code.
It worked for me in Java Spring boot project.
response.setHeader("Server", "none");
Try adding from code if it is deployed in tomcat.