public boolean isUsingProxy() {
        return !StringUtils.isBlank(getProxyHost()) && getProxyPort() > 0;
    }
Returns true if a proxy is being used to connect to igniterealtime.org or false if
a direct connection should be attempted.

@return true if a proxy is being used to connect to igniterealtime.org.
xmppserver/src/main/java/org/jivesoftware/openfire/update/UpdateManager.java