diff --git a/Duplicati/Library/Backend/FTP/FTPBackend.cs b/Duplicati/Library/Backend/FTP/FTPBackend.cs
index 68bb91169..00a3cea94 100644
--- a/Duplicati/Library/Backend/FTP/FTPBackend.cs
+++ b/Duplicati/Library/Backend/FTP/FTPBackend.cs
@@ -107,6 +107,10 @@ namespace Duplicati.Library.Backend
         /// </summary>
         protected virtual string CONFIG_KEY_FTP_LOGPRIVATEINFOTOCONSOLE => "ftp-log-privateinfo-to-console";
         /// <summary>
+        /// The configuration key for the FTP log to console
+        /// </summary>
+        protected virtual string CONFIG_KEY_FTP_LOGDIAGNOSTICS => "ftp-log-diagnostics";
+        /// <summary>
         /// The configuration key for the FTP absolute paths option
         /// </summary>
         protected virtual string CONFIG_KEY_FTP_ABSOLUTE_PATH => "ftp-absolute-path";
@@ -198,6 +202,10 @@ namespace Duplicati.Library.Backend
         /// </summary>
         private readonly bool _logPrivateInfoToConsole;
         /// <summary>
+        /// The flag to indicate if diagnostics information should be logged
+        /// </summary>
+        private readonly bool _diagnosticsLog;
+        /// <summary>
         /// The flag to indicate if all certificates should be accepted
         /// </summary>
         private readonly bool _accepAllCertificates;
@@ -240,6 +248,7 @@ namespace Duplicati.Library.Backend
                 new CommandLineArgument(CONFIG_KEY_FTP_UPLOAD_DELAY, CommandLineArgument.ArgumentType.Timespan, Strings.DescriptionUploadDelayShort, Strings.DescriptionUploadDelayLong, DEFAULT_UPLOAD_DELAY_STRING),
                 new CommandLineArgument(CONFIG_KEY_FTP_LOGTOCONSOLE, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionLogToConsoleShort, Strings.DescriptionLogToConsoleLong),
                 new CommandLineArgument(CONFIG_KEY_FTP_LOGPRIVATEINFOTOCONSOLE, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionLogPrivateInfoToConsoleShort, Strings.DescriptionLogPrivateInfoToConsoleLong, "false"),
+                new CommandLineArgument(CONFIG_KEY_FTP_LOGDIAGNOSTICS, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionLogDiagnosticsShort, Strings.DescriptionLogDiagnosticsLong),
                 new CommandLineArgument(CONFIG_KEY_FTP_LEGACY_FTPPASSIVE, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionFTPPassiveShort, Strings.DescriptionFTPPassiveLong, "false", null, null, Strings.FtpPassiveDeprecated),
                 new CommandLineArgument(CONFIG_KEY_FTP_LEGACY_FTPREGULAR, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionFTPActiveShort, Strings.DescriptionFTPActiveLong, "true", null, null, Strings.FtpActiveDeprecated),
                 new CommandLineArgument(CONFIG_KEY_FTP_LEGACY_USESSL, CommandLineArgument.ArgumentType.Boolean, Strings.DescriptionUseSSLShort, Strings.DescriptionUseSSLLong, "false", null, null, Strings.UseSslDeprecated),
@@ -341,6 +350,7 @@ namespace Duplicati.Library.Backend
 
             _logToConsole = CoreUtility.ParseBoolOption(options, CONFIG_KEY_FTP_LOGTOCONSOLE);
             _logPrivateInfoToConsole = CoreUtility.ParseBoolOption(options, CONFIG_KEY_FTP_LOGPRIVATEINFOTOCONSOLE);
+            _diagnosticsLog = CoreUtility.ParseBoolOption(options, CONFIG_KEY_FTP_LOGDIAGNOSTICS);
 
             _ftpConfig = new FtpConfig
             {
@@ -661,7 +671,8 @@ namespace Duplicati.Library.Backend
                     Host = _url.Host,
                     Port = _url.Port == -1 ? 21 : _url.Port,
                     Credentials = _userInfo,
-                    Config = _ftpConfig
+                    Config = _ftpConfig,
+                    Logger = _diagnosticsLog ? new DiagnosticsLogger() : null
                 };
 
                 client.ValidateCertificate += HandleValidateCertificate;
@@ -772,5 +783,22 @@ namespace Duplicati.Library.Backend
 
             return false;
         }
+
+        private sealed class DiagnosticsLogger : IFtpLogger
+        {
+            private static readonly string LOGTAG = Logging.Log.LogTagFromType<DiagnosticsLogger>();
+            public void Log(FtpLogEntry entry)
+            {
+                var type = entry.Severity switch
+                {
+                    FtpTraceLevel.Verbose => Logging.LogMessageType.Verbose,
+                    FtpTraceLevel.Info => Logging.LogMessageType.Information,
+                    FtpTraceLevel.Warn => Logging.LogMessageType.Warning,
+                    FtpTraceLevel.Error => Logging.LogMessageType.Error,
+                    _ => Logging.LogMessageType.Information
+                };
+                Logging.Log.WriteMessage(type, LOGTAG, "FtpLogMessage", entry.Exception, entry.Message);
+            }
+        }
     }
 }
diff --git a/Duplicati/Library/Backend/FTP/Strings.cs b/Duplicati/Library/Backend/FTP/Strings.cs
index cd72bda65..fa16fd2f4 100644
--- a/Duplicati/Library/Backend/FTP/Strings.cs
+++ b/Duplicati/Library/Backend/FTP/Strings.cs
@@ -39,6 +39,8 @@ namespace Duplicati.Library.Backend
         public static string DescriptionLogToConsoleShort { get { return LC.L(@"Log FTP dialog to terminal console"); } }
         public static string DescriptionLogPrivateInfoToConsoleLong { get { return LC.L(@"Use this option to log FTP PRIVATE info (username, password) to console for debugging purposes (DO NOT POST THIS TO THE INTERNET!)"); } }
         public static string DescriptionLogPrivateInfoToConsoleShort { get { return LC.L(@"Log FTP PRIVATE info to console"); } }
+        public static string DescriptionLogDiagnosticsShort { get { return LC.L(@"Log diagnostics information"); } }
+        public static string DescriptionLogDiagnosticsLong { get { return LC.L(@"Use this option to log diagnostics information to the log output. This can be useful for debugging purposes."); } }
         public static string MissingFolderError(string foldername, string message) { return LC.L(@"The folder {0} was not found. Message: {1}", foldername, message); }
         public static string ListVerifyFailure(string filename, IEnumerable<string> files) { return LC.L(@"The file {0} was uploaded but not found afterwards. The file listing returned {1}", filename, string.Join(Environment.NewLine, files)); }
         public static string ListVerifySizeFailure(string filename, long actualsize, long expectedsize) { return LC.L(@"The file {0} was uploaded but the returned size was {1} and it was expected to be {2}", filename, actualsize, expectedsize); }