What does IO Exception "Server Certificate subjectDN CommonName received does not match Server hostname" mean?

Question

While trying to establish a SSL Link to a URL Connection, I got an IO
Exception "Server Certificate subjectDN CommonName received does not match
Server hostname" on the destConn.getOutputStream().
What does this mean? And how do I fix it?
System.setProperty("https.proxyHost", "xxxx");
System.setProperty("https.proxyPort", "0000");
System.setProperty("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
URL destURL = new URL("URLaddress");
URLConnection destConn = destURL.openConnection();
((java.net.HttpURLConnection)destConn).setRequestMethod("POST");
destConn.setDoInput(true);
destConn.setDoOutput(true);
URLin = new PrintWriter( new BufferedWriter(
new
OutputStreamWriter(destConn.getOutputStream())));

Answer 1

Hi,
I was wondering if there was a solution for this. I am using the certficates and
keys that came with the installation of 6.1. Do I have to regenerate them in order
to use them in weblogic. I am getting this same error when I try to run the SSLClient
class in the examples.security.sslclient.
Jerry <[email protected]> wrote:
Hi Terry,
The server-side certificate has a DN (distinguished name) embedded in it.
This usually looks like a full hostname -- something like www.mycomputer.com
When you make the reaquest
URL destURL = new URL("URLaddress");
The string for "URLaddress" should match the DN of the certificate on the
server that you are requesting a connection to. It needs to match because
there is a compare of the DN in the cert, to the requested host.
In other words, if you are connecting to www.mycomputer.com, then the server
running on www.mycomputer.com should have a certificate with the DN
www.mycomputer.com
Then, when the match of the certificate DN to the requested host is done,
it
will succeed.
Right now, this match appears to be failing for you.
Cheers
Joe Jerry
Terry Treadwell wrote:
While trying to establish a SSL Link to a URL Connection, I got an IO
Exception "Server Certificate subjectDN CommonName received does not match
Server hostname" on the destConn.getOutputStream().
What does this mean? And how do I fix it?
System.setProperty("https.proxyHost", "xxxx");
System.setProperty("https.proxyPort", "0000");
System.setProperty("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
URL destURL = new URL("URLaddress");
URLConnection destConn = destURL.openConnection();
((java.net.HttpURLConnection)destConn).setRequestMethod("POST");
destConn.setDoInput(true);
destConn.setDoOutput(true);
URLin = new PrintWriter( new BufferedWriter(
new
OutputStreamWriter(destConn.getOutputStream())));