diff --git a/server/src/main/java/org/elasticsearch/transport/TransportInfo.java b/server/src/main/java/org/elasticsearch/transport/TransportInfo.java
index c738cbe552c5f..cc69c493d8138 100644
--- a/server/src/main/java/org/elasticsearch/transport/TransportInfo.java
+++ b/server/src/main/java/org/elasticsearch/transport/TransportInfo.java
@@ -11,49 +11,25 @@
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
-import org.elasticsearch.common.logging.DeprecationCategory;
-import org.elasticsearch.common.logging.DeprecationLogger;
 import org.elasticsearch.common.network.InetAddresses;
 import org.elasticsearch.common.transport.BoundTransportAddress;
 import org.elasticsearch.common.transport.TransportAddress;
 import org.elasticsearch.common.util.Maps;
 import org.elasticsearch.core.Nullable;
-import org.elasticsearch.core.UpdateForV9;
 import org.elasticsearch.node.ReportingService;
 import org.elasticsearch.xcontent.XContentBuilder;
 
 import java.io.IOException;
 import java.util.Map;
 
-import static org.elasticsearch.core.Booleans.parseBoolean;
-
 public class TransportInfo implements ReportingService.Info {
 
-    private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(TransportInfo.class);
-
-    /** Whether to add hostname to publish host field when serializing. */
-    @UpdateForV9 // Remove es.transport.cname_in_publish_address property from TransportInfo in 9.0.0
-    private static final boolean CNAME_IN_PUBLISH_ADDRESS = parseBoolean(
-        System.getProperty("es.transport.cname_in_publish_address"),
-        false
-    );
-
     private final BoundTransportAddress address;
     private Map<String, BoundTransportAddress> profileAddresses;
-    private final boolean cnameInPublishAddressProperty;
 
     public TransportInfo(BoundTransportAddress address, @Nullable Map<String, BoundTransportAddress> profileAddresses) {
-        this(address, profileAddresses, CNAME_IN_PUBLISH_ADDRESS);
-    }
-
-    public TransportInfo(
-        BoundTransportAddress address,
-        @Nullable Map<String, BoundTransportAddress> profileAddresses,
-        boolean cnameInPublishAddressProperty
-    ) {
         this.address = address;
         this.profileAddresses = profileAddresses;
-        this.cnameInPublishAddressProperty = cnameInPublishAddressProperty;
     }
 
     public TransportInfo(StreamInput in) throws IOException {
@@ -67,7 +43,6 @@ public TransportInfo(StreamInput in) throws IOException {
                 profileAddresses.put(key, value);
             }
         }
-        this.cnameInPublishAddressProperty = CNAME_IN_PUBLISH_ADDRESS;
     }
 
     @Override
@@ -97,16 +72,7 @@ private String formatPublishAddressString(String propertyName, TransportAddress
         String publishAddressString = publishAddress.toString();
         String hostString = publishAddress.address().getHostString();
         if (InetAddresses.isInetAddress(hostString) == false) {
-            publishAddressString = hostString + '/' + publishAddress.toString();
-            if (cnameInPublishAddressProperty) {
-                deprecationLogger.warn(
-                    DeprecationCategory.SETTINGS,
-                    "cname_in_publish_address",
-                    "es.transport.cname_in_publish_address system property is deprecated and no longer affects "
-                        + propertyName
-                        + " formatting. Remove this property to get rid of this deprecation warning."
-                );
-            }
+            publishAddressString = hostString + '/' + publishAddress;
         }
         return publishAddressString;
     }
diff --git a/server/src/test/java/org/elasticsearch/transport/TransportInfoTests.java b/server/src/test/java/org/elasticsearch/transport/TransportInfoTests.java
index 4a84dc558711f..9bc8140850ba2 100644
--- a/server/src/test/java/org/elasticsearch/transport/TransportInfoTests.java
+++ b/server/src/test/java/org/elasticsearch/transport/TransportInfoTests.java
@@ -24,44 +24,31 @@
 
 public class TransportInfoTests extends ESTestCase {
 
-    private TransportInfo createTransportInfo(InetAddress address, int port, boolean cnameInPublishAddressProperty) {
+    private TransportInfo createTransportInfo(InetAddress address, int port) {
         BoundTransportAddress boundAddress = new BoundTransportAddress(
             new TransportAddress[] { new TransportAddress(address, port) },
             new TransportAddress(address, port)
         );
         Map<String, BoundTransportAddress> profiles = Collections.singletonMap("test_profile", boundAddress);
-        return new TransportInfo(boundAddress, profiles, cnameInPublishAddressProperty);
+        return new TransportInfo(boundAddress, profiles);
     }
 
     public void testCorrectlyDisplayPublishedCname() throws Exception {
         InetAddress address = InetAddress.getByName("localhost");
         int port = 9200;
-        assertPublishAddress(createTransportInfo(address, port, false), "localhost/" + NetworkAddress.format(address) + ':' + port);
-    }
-
-    public void testDeprecatedWarningIfPropertySpecified() throws Exception {
-        InetAddress address = InetAddress.getByName("localhost");
-        int port = 9200;
-        assertPublishAddress(createTransportInfo(address, port, true), "localhost/" + NetworkAddress.format(address) + ':' + port);
-        assertWarnings(
-            "es.transport.cname_in_publish_address system property is deprecated and no longer affects "
-                + "transport.publish_address formatting. Remove this property to get rid of this deprecation warning.",
-
-            "es.transport.cname_in_publish_address system property is deprecated and no longer affects "
-                + "transport.test_profile.publish_address formatting. Remove this property to get rid of this deprecation warning."
-        );
+        assertPublishAddress(createTransportInfo(address, port), "localhost/" + NetworkAddress.format(address) + ':' + port);
     }
 
     public void testCorrectDisplayPublishedIp() throws Exception {
         InetAddress address = InetAddress.getByName(NetworkAddress.format(InetAddress.getByName("localhost")));
         int port = 9200;
-        assertPublishAddress(createTransportInfo(address, port, false), NetworkAddress.format(address) + ':' + port);
+        assertPublishAddress(createTransportInfo(address, port), NetworkAddress.format(address) + ':' + port);
     }
 
     public void testCorrectDisplayPublishedIpv6() throws Exception {
         InetAddress address = InetAddress.getByName(NetworkAddress.format(InetAddress.getByName("0:0:0:0:0:0:0:1")));
         int port = 9200;
-        assertPublishAddress(createTransportInfo(address, port, false), new TransportAddress(address, port).toString());
+        assertPublishAddress(createTransportInfo(address, port), new TransportAddress(address, port).toString());
     }
 
     @SuppressWarnings("unchecked")
diff --git a/x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/action/enrollment/TransportNodeEnrollmentActionTests.java b/x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/action/enrollment/TransportNodeEnrollmentActionTests.java
index 26bb64eb0b073..a4d94f9762e69 100644
--- a/x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/action/enrollment/TransportNodeEnrollmentActionTests.java
+++ b/x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/action/enrollment/TransportNodeEnrollmentActionTests.java
@@ -113,7 +113,7 @@ public void testDoExecute() throws Exception {
                     null,
                     null,
                     null,
-                    new TransportInfo(new BoundTransportAddress(new TransportAddress[] { n.getAddress() }, n.getAddress()), null, false),
+                    new TransportInfo(new BoundTransportAddress(new TransportAddress[] { n.getAddress() }, n.getAddress()), null),
                     null,
                     null,
                     null,