diff --git a/internal/room/cmddialer.go b/internal/room/cmddialer.go
deleted file mode 100644
index 145b1d8..0000000
--- a/internal/room/cmddialer.go
+++ /dev/null
@@ -1,93 +0,0 @@
-package room
-
-import (
-	"fmt"
-	"io"
-	"net"
-	"time"
-)
-
-type cmdDialer struct {
-	stdin  io.WriteCloser
-	stdout io.ReadCloser
-}
-
-// Read reads data from the connection.
-// Read can be made to time out and return an error after a fixed
-// time limit; see SetDeadline and SetReadDeadline.
-func (c *cmdDialer) Read(b []byte) (n int, err error) {
-	n, err = c.stdout.Read(b)
-	fmt.Printf("Read: %s\n", b)
-	return
-}
-
-// Write writes data to the connection.
-// Write can be made to time out and return an error after a fixed
-// time limit; see SetDeadline and SetWriteDeadline.
-func (c *cmdDialer) Write(b []byte) (n int, err error) {
-	fmt.Printf("Write: %s\n", b)
-	return c.stdin.Write(b)
-}
-
-// Close closes the connection.
-// Any blocked Read or Write operations will be unblocked and return errors.
-func (c *cmdDialer) Close() error {
-	if err := c.stdin.Close(); err != nil {
-		return err
-	}
-	return c.stdout.Close()
-}
-
-// LocalAddr returns the local network address, if known.
-func (c *cmdDialer) LocalAddr() net.Addr {
-	return nil
-}
-
-// RemoteAddr returns the remote network address, if known.
-func (c *cmdDialer) RemoteAddr() net.Addr {
-	return nil
-}
-
-// SetDeadline sets the read and write deadlines associated
-// with the connection. It is equivalent to calling both
-// SetReadDeadline and SetWriteDeadline.
-//
-// A deadline is an absolute time after which I/O operations
-// fail instead of blocking. The deadline applies to all future
-// and pending I/O, not just the immediately following call to
-// Read or Write. After a deadline has been exceeded, the
-// connection can be refreshed by setting a deadline in the future.
-//
-// If the deadline is exceeded a call to Read or Write or to other
-// I/O methods will return an error that wraps os.ErrDeadlineExceeded.
-// This can be tested using errors.Is(err, os.ErrDeadlineExceeded).
-// The error's Timeout method will return true, but note that there
-// are other possible errors for which the Timeout method will
-// return true even if the deadline has not been exceeded.
-//
-// An idle timeout can be implemented by repeatedly extending
-// the deadline after successful Read or Write calls.
-//
-// A zero value for t means I/O operations will not time out.
-func (c *cmdDialer) SetDeadline(t time.Time) error {
-	if err := c.SetReadDeadline(t); err != nil {
-		return err
-	}
-	return c.SetWriteDeadline(t)
-}
-
-// SetReadDeadline sets the deadline for future Read calls
-// and any currently-blocked Read call.
-// A zero value for t means Read will not time out.
-func (c *cmdDialer) SetReadDeadline(t time.Time) error {
-	return nil
-}
-
-// SetWriteDeadline sets the deadline for future Write calls
-// and any currently-blocked Write call.
-// Even if write times out, it may return n > 0, indicating that
-// some of the data was successfully written.
-// A zero value for t means Write will not time out.
-func (c *cmdDialer) SetWriteDeadline(t time.Time) error {
-	return nil
-}
diff --git a/internal/room/containers.go b/internal/room/containers.go
index 683699a..2997c77 100644
--- a/internal/room/containers.go
+++ b/internal/room/containers.go
@@ -9,9 +9,9 @@ import (
 
 	dockerTypes "github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
-	"github.com/docker/docker/pkg/stdcopy"
 
 	"github.com/m1k1o/neko-rooms/internal/types"
+	"github.com/m1k1o/neko-rooms/internal/utils"
 )
 
 func (manager *RoomManagerCtx) containerToEntry(container dockerTypes.Container) (*types.RoomEntry, error) {
@@ -145,8 +145,6 @@ func (manager *RoomManagerCtx) containerExec(id string, cmd []string) ([]byte, e
 
 func (manager *RoomManagerCtx) containerExecDialer(id string) func(ctx context.Context, network, addr string) (net.Conn, error) {
 	return func(ctx context.Context, network, addr string) (net.Conn, error) {
-		fmt.Println("dialer", network, addr)
-
 		// split addr
 		host, port, err := net.SplitHostPort(addr)
 		if err != nil {
@@ -156,16 +154,17 @@ func (manager *RoomManagerCtx) containerExecDialer(id string) func(ctx context.C
 		exec, err := manager.client.ContainerExecCreate(ctx, id, dockerTypes.ExecConfig{
 			AttachStdin:  true,
 			AttachStdout: true,
-			AttachStderr: true,
-			Cmd:          []string{"wget", "-O-", "http://" + host + ":" + port + ""},
+			AttachStderr: false,
+			Cmd:          []string{"nc", host, port},
 			Tty:          false,
 			Detach:       false,
 		})
+
 		if err != nil {
 			return nil, err
 		}
 
-		c, err := manager.client.ContainerExecAttach(ctx, exec.ID, dockerTypes.ExecStartCheck{
+		res, err := manager.client.ContainerExecAttach(ctx, exec.ID, dockerTypes.ExecStartCheck{
 			Detach: false,
 			Tty:    false,
 		})
@@ -173,22 +172,6 @@ func (manager *RoomManagerCtx) containerExecDialer(id string) func(ctx context.C
 			return nil, err
 		}
 
-		// Read all
-		// io.ReadAll(c.Reader)
-		dat, err := io.ReadAll(c.Reader)
-		if err != nil {
-			return nil, err
-		}
-
-		fmt.Println("dialer", string(dat))
-
-		// new pipe
-		stderr := stdcopy.NewStdWriter(c.Conn, stdcopy.Stderr)
-		stdout := stdcopy.NewStdWriter(c.Conn, stdcopy.Stdout)
-
-		return &cmdDialer{
-			stdin:  c.Conn,
-			stdout: c.Conn,
-		}, nil
+		return utils.StdCopyDialer(res), nil
 	}
 }
diff --git a/internal/utils/stdcopydialer.go b/internal/utils/stdcopydialer.go
new file mode 100644
index 0000000..050d2fc
--- /dev/null
+++ b/internal/utils/stdcopydialer.go
@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"io"
+	"net"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/pkg/stdcopy"
+)
+
+type stdCopyDialer struct {
+	net.Conn
+	stdout io.ReadCloser
+}
+
+func StdCopyDialer(res types.HijackedResponse) net.Conn {
+	stdout, dstout := io.Pipe()
+	go stdcopy.StdCopy(dstout, io.Discard, res.Conn)
+
+	return &stdCopyDialer{
+		Conn:   res.Conn,
+		stdout: stdout,
+	}
+}
+
+func (d *stdCopyDialer) Read(b []byte) (int, error) {
+	return d.stdout.Read(b)
+}