diff --git a/build.gradle b/build.gradle
index b7fe3f63..29087fc3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -133,6 +133,9 @@ testing {
       }
 
       sources {
+        java {
+          srcDirs = ['src/it/java']
+        }
         groovy {
           srcDirs = ['src/it/groovy']
         }
diff --git a/src/it/java/com/hierynomus/smbj/AnonymousIntegrationTest.java b/src/it/java/com/hierynomus/smbj/AnonymousIntegrationTest.java
new file mode 100644
index 00000000..25c989a4
--- /dev/null
+++ b/src/it/java/com/hierynomus/smbj/AnonymousIntegrationTest.java
@@ -0,0 +1,51 @@
+package com.hierynomus.smbj;
+
+import org.junit.jupiter.api.Test;
+
+import com.hierynomus.mssmb2.SMB2Dialect;
+import com.hierynomus.security.bc.BCSecurityProvider;
+import com.hierynomus.smbj.auth.AuthenticationContext;
+import com.hierynomus.smbj.session.SMB2GuestSigningRequiredException;
+import com.hierynomus.smbj.session.Session;
+import com.hierynomus.smbj.share.DiskShare;
+import com.hierynomus.smbj.share.Share;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static com.hierynomus.smbj.testing.TestingUtils.*;
+
+public class AnonymousIntegrationTest {
+
+    private SmbConfig base = SmbConfig.builder().withDialects(SMB2Dialect.SMB_3_1_1).withEncryptData(true).withSigningRequired(false).withMultiProtocolNegotiate(true).withDfsEnabled(true).withSecurityProvider(new BCSecurityProvider()).build();
+
+    @Test
+    public void shouldAuthenticateAnonymous() throws Exception {
+        withConnectedClient(base, (connection) -> {
+            try (Session session = connection.authenticate(AuthenticationContext.anonymous())) {
+                assertNotNull(session.getSessionId());
+            }
+        });
+    }
+
+    @Test
+    public void shouldFailConnectingAnonymousWhenSigningRequired() throws Exception {
+        SmbConfig config = SmbConfig.builder(base).withSigningRequired(true).build();
+        assertThrows(SMB2GuestSigningRequiredException.class, () -> withConnectedClient(config, (connection) -> {
+            try (Session session = connection.authenticate(AuthenticationContext.anonymous())) {
+                fail("Should not be able to connect");
+            }
+        }));
+    }
+
+    @Test
+    public void shouldConnectToPublicShare() throws Exception {
+        withConnectedClient(base, (connection) -> {
+            try (Session session = connection.authenticate(AuthenticationContext.anonymous())) {
+                try (Share share = session.connectShare("public")) {
+                    assertInstanceOf(DiskShare.class, share);
+                    assertTrue(share.isConnected());
+                    assertNotNull(share.getTreeConnect().getTreeId());
+                }
+            }
+        });
+    }
+}
diff --git a/src/it/java/com/hierynomus/smbj/testing/TestingUtils.java b/src/it/java/com/hierynomus/smbj/testing/TestingUtils.java
new file mode 100644
index 00000000..bc9c7a1e
--- /dev/null
+++ b/src/it/java/com/hierynomus/smbj/testing/TestingUtils.java
@@ -0,0 +1,21 @@
+package com.hierynomus.smbj.testing;
+
+import java.util.function.Consumer;
+
+import com.hierynomus.smbj.SMBClient;
+import com.hierynomus.smbj.SmbConfig;
+import com.hierynomus.smbj.connection.Connection;
+
+public class TestingUtils {
+    public static void withConnectedClient(SmbConfig config, ConsumerWithError<Connection> f) throws Exception {
+        try (SMBClient client = new SMBClient(config)) {
+            try (Connection connection = client.connect("127.0.0.1")) {
+                f.accept(connection);
+            }
+        }
+    }
+
+    public interface ConsumerWithError<T> {
+        void accept(T val) throws Exception;
+    }
+}
diff --git a/src/main/java/com/hierynomus/ntlm/NtlmConfig.java b/src/main/java/com/hierynomus/ntlm/NtlmConfig.java
index 3f26a40b..c605d341 100644
--- a/src/main/java/com/hierynomus/ntlm/NtlmConfig.java
+++ b/src/main/java/com/hierynomus/ntlm/NtlmConfig.java
@@ -38,6 +38,10 @@ public static Builder builder(Random r) {
         return new Builder(r);
     }
 
+    public static Builder builder(NtlmConfig baseConfig) {
+        return new Builder(baseConfig);
+    }
+
     private NtlmConfig() {
     }
 
@@ -74,13 +78,18 @@ public static class Builder {
 
         public Builder(Random r) {
             config = new NtlmConfig();
-            config.windowsVersion = new WindowsVersion(ProductMajorVersion.WINDOWS_MAJOR_VERSION_6, ProductMinorVersion.WINDOWS_MINOR_VERSION_1, 7600, NtlmRevisionCurrent.NTLMSSP_REVISION_W2K3);
+            config.windowsVersion = new WindowsVersion(ProductMajorVersion.WINDOWS_MAJOR_VERSION_6,
+                    ProductMinorVersion.WINDOWS_MINOR_VERSION_1, 7600, NtlmRevisionCurrent.NTLMSSP_REVISION_W2K3);
             config.integrity = true;
             config.omitVersion = false;
             config.machineID = new byte[32];
             r.nextBytes(config.machineID);
         }
 
+        public Builder(NtlmConfig baseConfig) {
+            config = new NtlmConfig(baseConfig);
+        }
+
         public Builder withWindowsVersion(WindowsVersion windowsVersion) {
             config.windowsVersion = windowsVersion;
             return this;
diff --git a/src/main/java/com/hierynomus/smbj/SmbConfig.java b/src/main/java/com/hierynomus/smbj/SmbConfig.java
index 1d4f85a3..2347ae29 100644
--- a/src/main/java/com/hierynomus/smbj/SmbConfig.java
+++ b/src/main/java/com/hierynomus/smbj/SmbConfig.java
@@ -98,26 +98,30 @@ public static SmbConfig createDefaultConfig() {
     }
 
     public static Builder builder() {
-        Builder b =  new Builder()
-            .withClientGuid(UUID.randomUUID())
-            .withSecurityProvider(getDefaultSecurityProvider())
-            .withSocketFactory(new ProxySocketFactory())
-            .withSigningRequired(false)
-            .withDfsEnabled(false)
-            .withMultiProtocolNegotiate(false)
-            .withBufferSize(DEFAULT_BUFFER_SIZE)
-            .withTransportLayerFactory(DEFAULT_TRANSPORT_LAYER_FACTORY)
-            .withSoTimeout(DEFAULT_SO_TIMEOUT, DEFAULT_SO_TIMEOUT_UNIT)
-            .withDialects(SMB_3_1_1, SMB_3_0_2, SMB_3_0, SMB_2_1, SMB_2_0_2)
-            // order is important.  The authenticators listed first will be selected
-            .withAuthenticators(getDefaultAuthenticators())
-            .withTimeout(DEFAULT_TIMEOUT, DEFAULT_TIMEOUT_UNIT)
-            .withClientGSSContextConfig(GSSContextConfig.createDefaultConfig())
-            .withEncryptData(false);
+        Builder b = new Builder()
+                .withClientGuid(UUID.randomUUID())
+                .withSecurityProvider(getDefaultSecurityProvider())
+                .withSocketFactory(new ProxySocketFactory())
+                .withSigningRequired(false)
+                .withDfsEnabled(false)
+                .withMultiProtocolNegotiate(false)
+                .withBufferSize(DEFAULT_BUFFER_SIZE)
+                .withTransportLayerFactory(DEFAULT_TRANSPORT_LAYER_FACTORY)
+                .withSoTimeout(DEFAULT_SO_TIMEOUT, DEFAULT_SO_TIMEOUT_UNIT)
+                .withDialects(SMB_3_1_1, SMB_3_0_2, SMB_3_0, SMB_2_1, SMB_2_0_2)
+                // order is important.  The authenticators listed first will be selected
+                .withAuthenticators(getDefaultAuthenticators())
+                .withTimeout(DEFAULT_TIMEOUT, DEFAULT_TIMEOUT_UNIT)
+                .withClientGSSContextConfig(GSSContextConfig.createDefaultConfig())
+                .withEncryptData(false);
 
         return b;
     }
 
+    public static Builder builder(SmbConfig baseConfig) {
+        return new Builder(baseConfig);
+    }
+
     private static SecurityProvider getDefaultSecurityProvider() {
         return new BCSecurityProvider();
     }
@@ -284,6 +288,11 @@ public static class Builder {
             ntlmConfigBuilder = NtlmConfig.builder(config.random);
         }
 
+        Builder(SmbConfig baseConfig) {
+            config = new SmbConfig(baseConfig);
+            ntlmConfigBuilder = NtlmConfig.builder(config.ntlmConfig);
+        }
+
         public Builder withRandomProvider(Random random) {
             if (random == null) {
                 throw new IllegalArgumentException("Random provider may not be null");
diff --git a/src/main/java/com/hierynomus/smbj/connection/SMBSessionBuilder.java b/src/main/java/com/hierynomus/smbj/connection/SMBSessionBuilder.java
index 130af485..65b6eb74 100644
--- a/src/main/java/com/hierynomus/smbj/connection/SMBSessionBuilder.java
+++ b/src/main/java/com/hierynomus/smbj/connection/SMBSessionBuilder.java
@@ -107,7 +107,7 @@ public SMBSessionBuilder(Connection connection, SmbConfig config, SessionFactory
     public Session establish(AuthenticationContext authContext) {
         try {
             Authenticator authenticator = getAuthenticator(authContext);
-            if (authenticator instanceof NtlmAuthenticator && config.getNtlmConfig().isIntegrityEnabled()) {
+            if (authenticator instanceof NtlmAuthenticator && config.getNtlmConfig().isIntegrityEnabled() && !(authContext.isAnonymous() && !(authContext.isGuest()))) {
                 authenticator = new NtlmSealer((NtlmAuthenticator) authenticator);
             }
 
@@ -163,7 +163,9 @@ private Session setupSession(BuilderContext ctx) throws IOException {
 
             SessionContext context = session.getSessionContext();
             processAuthenticationToken(ctx, response.getSecurityBuffer());
-            context.setSessionKey(new SecretKeySpec(ctx.sessionKey, HMAC_SHA256_ALGORITHM));
+            if (!ctx.authContext.isAnonymous() && !ctx.authContext.isGuest()) {
+                context.setSessionKey(new SecretKeySpec(ctx.sessionKey, HMAC_SHA256_ALGORITHM));
+            }
             if (dialect == SMB2Dialect.SMB_3_1_1) {
                 updatePreauthIntegrityValue(ctx, context, ctx.request);
             }