diff --git a/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java b/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java
index 6e9acdda2e..1ecd1701b6 100644
--- a/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java
+++ b/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java
@@ -62,6 +62,7 @@ import org.apache.http.config.Registry;
 import org.apache.http.config.RegistryBuilder;
 import org.apache.http.conn.HttpClientConnectionManager;
 import org.apache.http.conn.socket.ConnectionSocketFactory;
+import org.apache.http.conn.socket.PlainConnectionSocketFactory;
 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
 import org.apache.http.conn.ssl.SSLContexts;
 import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
@@ -358,7 +359,12 @@ public class GetHTTP extends AbstractSessionFactoryProcessor {
 
             final SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new String[]{"TLSv1"}, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
 
-            final Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("https", sslsf).build();
+            // Also include a plain socket factory for regular http connections (especially proxies)
+            final Registry<ConnectionSocketFactory> socketFactoryRegistry =
+                    RegistryBuilder.<ConnectionSocketFactory>create()
+                            .register("https", sslsf)
+                            .register("http", PlainConnectionSocketFactory.getSocketFactory())
+                            .build();
 
             conMan = new BasicHttpClientConnectionManager(socketFactoryRegistry);
         }
diff --git a/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/PostHTTP.java b/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/PostHTTP.java
index 98056cb83b..1dc7aba38d 100644
--- a/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/PostHTTP.java
+++ b/nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/PostHTTP.java
@@ -64,6 +64,7 @@ import org.apache.http.config.RegistryBuilder;
 import org.apache.http.conn.HttpClientConnectionManager;
 import org.apache.http.conn.ManagedHttpClientConnection;
 import org.apache.http.conn.socket.ConnectionSocketFactory;
+import org.apache.http.conn.socket.PlainConnectionSocketFactory;
 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
 import org.apache.http.conn.ssl.SSLContextBuilder;
 import org.apache.http.conn.ssl.SSLContexts;
@@ -362,7 +363,12 @@ public class PostHTTP extends AbstractProcessor {
 
             final SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new String[]{"TLSv1"}, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
 
-            final Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("https", sslsf).build();
+            // Also use a plain socket factory for regular http connections (especially proxies)
+            final Registry<ConnectionSocketFactory> socketFactoryRegistry =
+                    RegistryBuilder.<ConnectionSocketFactory>create()
+                            .register("https", sslsf)
+                            .register("http", PlainConnectionSocketFactory.getSocketFactory())
+                            .build();
 
             conMan = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
         }