As a developer I am really happy to have an easy way to determine which version of a software I’m running. But I do not like it if my software tells everyone its name and version, as this gives important fingerprinting information to possible attackers.
If you use WildFly versions 8 through 10 or JBoss EAP version 7 the default configuration includes some HTTP headers that are too verbose in my opinion. JBoss EAP 6 is not affected by the way. The headers you get look like this
Server: JBoss-EAP/7 X-Powered-By: Undertow/1
Getting rid of these headers is really easy. So I think the tiny effort to remove these headers should be put into any project even if the probability of getting attacked and the possible impact are really small.
To fix the problem let’s have a look at the default configuration in the standalone.xml: