byte[] token = negoResp.getSecurityBlob();
        final int securityMode = negoResp.getSecurityMode();
        boolean anonymous = this.credentials.isAnonymous();
        final boolean doSigning = securityMode != 0 && !anonymous;
        long newSessId = 0;
        long curSessId = this.sessionId;

        synchronized ( trans ) {
            this.credentials.refresh();

            tree.treeConnect(null, null);
        } catch (SmbAuthException sae) {
            NtlmPasswordAuthentication a;
            SmbSession ssn;

            if (share == null) { // IPC$ - try "anonymous" credentials
                ssn = trans.getSmbSession(NtlmPasswordAuthentication.NULL);
                tree = ssn.getSmbTree(null, null);
                tree.treeConnect(null, null);

        NtlmPasswordAuthenticator ntlmGuestCreds = guestCreds.unwrap(NtlmPasswordAuthenticator.class);
        assertThat("anonymous", ntlmGuestCreds.isAnonymous(), CoreMatchers.is(false));
        assertThat("guest", ntlmGuestCreds.isGuest(), CoreMatchers.is(true));

        Credentials anonCreds = this.context.withAnonymousCredentials().getCredentials();

        try ( SmbFile f = new SmbFile(url) ) {
            Credentials creds = f.getContext().getCredentials();

            assertFalse(creds.isAnonymous());
            assertFalse(creds.isGuest());
            assertTrue(creds instanceof NtlmPasswordAuthenticator);
            NtlmPasswordAuthenticator ntcreds = (NtlmPasswordAuthenticator) creds;

                                tf,
                                dr.getServer(),
                                0,
                                false,
                                !tf.getCredentials().isAnonymous() && tf.getConfig().isSigningEnabled() && tf.getConfig().isIpcSigningEnforced())
                                    .unwrap(SmbTransportImpl.class);
                            transport.ensureConnected();

        }

        if ( transport.getContext().getConfig().isIpcSigningEnforced() && ( "IPC$".equals(this.getShare()) || "IPC".equals(rsvc) )
                && !sess.getCredentials().isAnonymous() && sess.getDigest() == null ) {
            throw new SmbException("IPC signing is enforced, but no signing is available");
        }

        this.service = rsvc;
        this.inDfs = response.isShareDfs();