Why request.getRemoteAddr() returns ipv4 or ipv6 depending on context (post query or ajax query)

Question

I\'ve donne a web app with Spring/GWT that uses Flash to upload files.

When I send an ajax request with GWT and try to get the user ip address, I get an ipv4 address lik

Answer 1

You can fix it by starting your server with this flag

-Djava.net.preferIPv4Stack=true