public static Map<String, SrvRecord> getDnsOverride() {
        return dnsOverride;
    }
Returns the internal DNS that allows to specify target IP addresses and ports
to use for domains. The internal DNS will be checked up before performing an
actual DNS SRV lookup.

@return the internal DNS that allows to specify target IP addresses and ports
        to use for domains.
xmppserver/src/main/java/org/jivesoftware/openfire/net/DNSUtil.java