try (SmbTransport dc = getDc(tf, authDomain)) {
                final CacheEntry<Map<String, CacheEntry<DfsReferralDataInternal>>> entry =
                        new CacheEntry<>(tf.getConfig().getDfsTtl() * 10L);
                DfsReferralData initial = null;
                @SuppressWarnings("resource")
                final SmbTransportInternal trans = dc != null ? dc.unwrap(SmbTransportInternal.class) : null;

                    dc = nameServiceClient.getByName(mb);
                } else {
                    dc = nameServiceClient.getByName(server, possibleWorkgroup);
                }

                req.getSession(); /* ensure session id is set for cluster env. */
                challenge = getTransportContext().getTransportPool().getChallenge(getTransportContext(), dc);

        Map<String, String> initParams = new HashMap<>();
        initParams.put("jcifs.smb.client.domain", "TEST_DOMAIN");
        initParams.put("jcifs.http.domainController", "dc.test.com");
        initParams.put("jcifs.http.enableBasic", "true");
        initParams.put("jcifs.http.insecureBasic", "true");
        initParams.put("jcifs.http.basicRealm", "TestRealm");

    //
    //        /* Procedure:
    //         * Lookup a DC in the target domain
    //         * Ask the DC for a referral for the domain (e.g. "\example.com")
    //         * Do NetrDfsEnumEx on the server returned in the referral to
    //         * get roots in target domain
    //         */
    //
    //        UniAddress dc = UniAddress.getByName(domainName);

        assertNull(dfsImpl.getDc(mockContext, "anydomain.com"));
    }

    @Test
    void testGetDc_ConnectionFails() throws SmbAuthException {
        // Scenario: Transport connection fails when getting DC
        when(mockCredentials.getUserDomain()).thenReturn("authdomain.com");
        // When transport fails to connect, getDc returns null
        assertNull(dfsImpl.getDc(mockContext, "anydomain.com"));
    }

                    dc = UniAddress.getByName(mb);
                } else {
                    dc = UniAddress.getByName(server, possibleWorkgroup);
                }

                req.getSession(); /* ensure session id is set for cluster env. */
                challenge = SmbSession.getChallenge(dc);
                if ((ntlm = NtlmSsp.authenticate(req, resp, challenge)) == null) {

     * UnknownHostException uhe = null;
     *
     * try {
     * context = new InitialDirContext();
     * for ( ;; ) {
     * try {
     * Attributes attributes = context.getAttributes(
     * "dns:/_ldap._tcp.dc._msdcs." + name,
     * new String[] { "SRV" }
     * );
     * return name;
     * } catch (NameNotFoundException nnfe) {
     * uhe = new UnknownHostException(nnfe.getMessage());
     * }

# Base DN for LDAP admin user.
ldap.admin.user.base.dn=ou\=People,dc\=fess,dc\=codelibs,dc\=org
# Object classes for LDAP admin user.
ldap.admin.user.object.classes=organizationalPerson,top,person,inetOrgPerson
# Role filter for LDAP admin.
ldap.admin.role.filter=cn\=%s
# Base DN for LDAP admin role.
ldap.admin.role.base.dn=ou\=Role,dc\=fess,dc\=codelibs,dc\=org
# Object classes for LDAP admin role.

        Map<String, String> initParams = new HashMap<>();
        initParams.put("jcifs.smb.client.domain", "TEST_DOMAIN");
        initParams.put("jcifs.http.domainController", "dc.test.domain");
        initParams.put("jcifs.http.enableBasic", "true");
        initParams.put("jcifs.http.insecureBasic", "true");
        initParams.put("jcifs.http.basicRealm", "TestRealm");

            defaultMap.put(FessConfig.LDAP_ADMIN_USER_BASE_DN, "ou=People,dc=fess,dc=codelibs,dc=org");
            defaultMap.put(FessConfig.LDAP_ADMIN_USER_OBJECT_CLASSES, "organizationalPerson,top,person,inetOrgPerson");
            defaultMap.put(FessConfig.LDAP_ADMIN_ROLE_FILTER, "cn=%s");
            defaultMap.put(FessConfig.LDAP_ADMIN_ROLE_BASE_DN, "ou=Role,dc=fess,dc=codelibs,dc=org");