diff --git a/src/main/java/com/thindeck/steps/LoadBalancer.java b/src/main/java/com/thindeck/steps/LoadBalancer.java
new file mode 100644
index 00000000..6c49743f
--- /dev/null
+++ b/src/main/java/com/thindeck/steps/LoadBalancer.java
@@ -0,0 +1,61 @@
+/**
+ * Copyright (c) 2014, Thindeck.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met: 1) Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer. 2) Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution. 3) Neither the name of the thindeck.com nor
+ * the names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+ * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.thindeck.steps;
+
+import com.jcabi.aspects.Immutable;
+
+/**
+ * Load balancer representation.
+ *
+ * @author Carlos Miranda (miranda.cma@gmail.com)
+ * @version $Id$
+ * @since 0.3
+ * @todo #293 Let's implement a class Nginx that implements this interface. It
+ *  should be able to connect via SSH to a server that has Nginx installed. At
+ *  the minimum, we should be update the Nginx configuration of the server it's
+ *  connected to. This class will be used primarily for the UpdateLB step. See
+ *  https://github.com/yegor256/thindeck/issues/303 for more details.
+ */
+@Immutable
+public interface LoadBalancer {
+
+    /**
+     * Update load balancer configuration with the given mapping.
+     * @param host The host name indicated by requests
+     * @param hport Port corresponding to the host name
+     * @param server Server name to redirect requests to
+     * @param sport Server port to redirect requests to
+     * @checkstyle ParameterNumber (3 lines)
+     */
+    void update(
+        final String host, final int hport, final String server, final int sport
+    );
+
+}
diff --git a/src/main/java/com/thindeck/steps/UpdateLB.java b/src/main/java/com/thindeck/steps/UpdateLB.java
new file mode 100644
index 00000000..219765fd
--- /dev/null
+++ b/src/main/java/com/thindeck/steps/UpdateLB.java
@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) 2014, Thindeck.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met: 1) Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer. 2) Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution. 3) Neither the name of the thindeck.com nor
+ * the names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+ * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.thindeck.steps;
+
+import com.jcabi.aspects.Immutable;
+import com.thindeck.api.Context;
+import com.thindeck.api.Step;
+import java.io.IOException;
+
+/**
+ * Update Load Balancer.
+ *
+ * @author Carlos Miranda (miranda.cma@gmail.com)
+ * @version $Id$
+ * @since 0.3
+ */
+@Immutable
+public final class UpdateLB implements Step {
+
+    /**
+     * Public ctor.
+     * @param bal The load balancer
+     */
+    @SuppressWarnings("PMD.UnusedFormalParameter")
+    public UpdateLB(final LoadBalancer bal) {
+        throw new UnsupportedOperationException("Not yet implemented");
+    }
+
+    @Override
+    public String name() {
+        return "update-lb";
+    }
+
+    @Override
+    public void exec(final Context ctx) throws IOException {
+        throw new UnsupportedOperationException("exec: Not yet implemented");
+    }
+
+    @Override
+    public void commit(final Context ctx) throws IOException {
+        // nothing to commit
+    }
+
+    @Override
+    public void rollback(final Context ctx) throws IOException {
+        // nothing to rollback
+    }
+
+}
diff --git a/src/test/java/com/thindeck/steps/UpdateLBTest.java b/src/test/java/com/thindeck/steps/UpdateLBTest.java
new file mode 100644
index 00000000..9bd6286c
--- /dev/null
+++ b/src/test/java/com/thindeck/steps/UpdateLBTest.java
@@ -0,0 +1,102 @@
+/**
+ * Copyright (c) 2014, Thindeck.com
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met: 1) Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer. 2) Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution. 3) Neither the name of the thindeck.com nor
+ * the names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
+ * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.thindeck.steps;
+
+import com.thindeck.api.Context;
+import com.thindeck.api.Step;
+import com.thindeck.api.mock.MkContext;
+import java.io.IOException;
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.xembly.Directives;
+
+/**
+ * Test case for {@link UpdateLB}.
+ *
+ * @author Carlos Miranda (miranda.cma@gmail.com)
+ * @version $Id$
+ * @since 0.3
+ */
+public final class UpdateLBTest {
+
+    /**
+     * FindTanks can update load balancer configuration from memo.
+     * @throws IOException If fails
+     * @todo #293 The test is currently ignored for two reasons:
+     *  1. The schema memo.xsd does not yet define the domain element. The test
+     *  will fail because the XML validation will throw an exception.
+     *  2. UpdateLB is not yet implemented, which means the verify statements
+     *  will fail even if the Memo XML is valid.
+     *  Let's address these issues and enable this test. See Github issue
+     *  https://github.com/yegor256/thindeck/issues/308 for further details.
+     */
+    @Test
+    @org.junit.Ignore
+    public void updatesLoadBalancerNginxConfig() throws IOException {
+        final LoadBalancer balancer = Mockito.mock(LoadBalancer.class);
+        final Step step = new UpdateLB(balancer);
+        final Context ctx = new MkContext();
+        // @checkstyle MagicNumber (6 lines)
+        final String domain = "www.example.com";
+        final int firstport = 80;
+        final int secondport = 443;
+        final String tank = "tank.thindeck.com";
+        final int firstout = 32667;
+        final int secondout = 32668;
+        // @checkstyle MultipleStringLiterals (30 lines)
+        // @checkstyle LineLength (13 lines)
+        ctx.memo().update(
+            new Directives()
+                .xpath("/memo")
+                .addIf("domains")
+                .addIf("domain")
+                .add("host").set(domain).up()
+                .addIf("ports")
+                .add("port").set(String.valueOf(firstport)).up()
+                .add("port").set(String.valueOf(secondport)).up()
+                .up().up().up()
+                .addIf("containers")
+                .addIf("container").attr("type", "green")
+                .add("cid").set("abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789").up()
+                .add("ports")
+                .add("in").set(String.valueOf(firstport)).up()
+                .add("out").set(String.valueOf(firstout)).up()
+                .add("in").set(String.valueOf(secondport)).up()
+                .add("out").set(String.valueOf(secondout)).up()
+                .up()
+                .add("dir").set("/fake/dir").up()
+                .add("tank").set(tank)
+        );
+        step.exec(ctx);
+        Mockito.verify(balancer).update(domain, firstport, tank, firstout);
+        Mockito.verify(balancer).update(domain, secondport, tank, secondout);
+    }
+
+}