update documents about multiple ports

README.md

@@ -61,14 +61,18 @@ Usage of ./endlessh-go
         when logging hits line file:N, emit a stack trace
   -log_dir string
         If non-empty, write log files in this directory
+  -log_link string
+        If non-empty, add symbolic links in this directory to the log files
+  -logbuflevel int
+        Buffer log messages logged at this level or lower (-1 means don't buffer; 0 means buffer INFO only; ...). Has limited applicability on non-prod platforms.
   -logtostderr
         log to standard error instead of files
   -max_clients int
         Maximum number of clients (default 4096)
   -max_mind_db string
         Path to the MaxMind DB file.
-  -port string
-        SSH listening port (default "2222")
+  -port value
+        SSH listening port. You may provide multiple -port flags to listen to multiple ports. (default "2222")
   -prometheus_entry string
         Entry point for prometheus (default "metrics")
   -prometheus_host string
@@ -76,7 +80,7 @@ Usage of ./endlessh-go
   -prometheus_port string
         The port for prometheus (default "2112")
   -stderrthreshold value
-        logs at or above this threshold go to stderr
+        logs at or above this threshold go to stderr (default 2)
   -v value
         log level for V logs
   -vmodule value

main.go

@@ -116,7 +116,7 @@ func main() {
 	maxClients := flag.Int64("max_clients", 4096, "Maximum number of clients")
 	connType := flag.String("conn_type", "tcp", "Connection type. Possible values are tcp, tcp4, tcp6")
 	connHost := flag.String("host", "0.0.0.0", "SSH listening address")
-	flag.Var(&connPorts, "port", "SSH listening port")
+	flag.Var(&connPorts, "port", fmt.Sprintf("SSH listening port. You may provide multiple -port flags to listen to multiple ports. (default %q)", defaultPort))
 	prometheusEnabled := flag.Bool("enable_prometheus", false, "Enable prometheus")
 	prometheusHost := flag.String("prometheus_host", "0.0.0.0", "The address for prometheus")
 	prometheusPort := flag.String("prometheus_port", "2112", "The port for prometheus")