How to create Java socket that is localhost only?

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I have a Java server that opens up a socket using ServerSocket (using Thrift with it). This server has a client on the local machine in Obj-c that communicates with the Java server. Everything happens on localhost. Right now the java server is visible on the network as well, I would like the java server to only be accessible on localhost. Otherwise it is a potential security vulnerability and it freaks users out when their firewall warns them.

I tried creating the server socket using an InetSocketAddress('localhost', 9090) but that seems to have no effect. How can I limit this thing to localhost?

sockets networking java
4 Answers

Try

new ServerSocket(9090, 0, InetAddress.getByName("localhost"))

The last parameter to the constructor specifies which address to bind the listening socket to.

user_1669550 
new ServerSocket(9090, 0, InetAddress.getByName(null));
user_2074210
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