Protocol error when attempting to connect to VBox VRDP using Microsoft's RDP client for Mac -> Fixed in a future version 1.6.6

[Dave King]

Running Windows XP guest system via VBoxVRDP on Fedora 7. VRDP is configured for "external" authentication. The Linux rdesktop command connects to the guest, no problems.

When I attempt to connect to the guest system using the "Microsoft Remote Desktop connection Client for Mac Version 2.0.0 Beta 2 (071001)" it fails to connect. A protocol error is logged in the VBox guest's log against a packet that contains the userid and password being sent by the client. (Dummy "userid" and "password" used in the log entry below in place of my real userid/password.)

The Mac client does successfully connect to other remote PCs.

Log extract:

00:07:07.969 VRDP: New connection: 00:07:07.996 VRDP: Channel: [rdpdr] [1004]. Not supported. 00:07:07.996 VRDP: Channel: [rdpsnd] [1005]. Accepted. 00:07:07.996 VRDP: Channel: [cliprdr] [1006]. Accepted. 00:07:08.084 VRDP: Failed to process incoming RDP packet: VERR_VRDP_PROTOCOL_ERROR!!! 00:07:08.085 VRDP: The RDP packet content: 00:07:08.085 00:07:08.085 09a64854 0000: 03 00 01 43 02 f0 80 64-00 01 03 eb 70 81 34 48 ...C...d....p.4H 00:07:08.085 09a64864 0010: 00 00 00 d3 cb 36 74 b7-b4 2a 08 09 04 00 00 bb .....6t..*...... 00:07:08.085 09a64874 0020: 43 03 00 00 00 26 00 10-00 00 00 00 00 00 00 31 C....&.........1 00:07:08.085 09a64884 0030: 00 39 00 32 00 2e 00 31-00 36 00 38 00 2e 00 31 .9.2...1.6.8...1 00:07:08.085 09a64894 0040: 00 2e 00 32 00 30 00 5c-00 75 00 73 00 65 00 72 ...2.0.\.u.s.e.r 00:07:08.085 09a648a4 0050: 00 69 00 64 00 00 00 70-00 61 00 73 00 73 00 77 .i.d...p.a.s.s.w 00:07:08.085 09a648b4 0060: 00 6f 00 72 00 64 00 00-00 00 00 00 00 02 00 1a .o.r.d.......... 00:07:08.085 09a648c4 0070: 00 31 00 39 00 32 00 2e-00 31 00 36 00 38 00 2e .1.9.2...1.6.8.. 00:07:08.085 09a648d4 0080: 00 31 00 2e 00 32 00 32-00 00 00 00 00 00 00 00 .1...2.2........ 00:07:08.085 09a648e4 0090: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a648f4 00a0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64904 00b0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64914 00c0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64924 00d0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64934 00e0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64944 00f0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64954 0100: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64964 0110: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64974 0120: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ 00:07:08.085 09a64984 0130: 00 00 00 00 00 00 00 00-00 a0 2b 00 00 07 00 00 ..........+..... 00:07:08.085 09a64994 0140: 00 00 00 ... 00:07:08.085 00:07:08.085 VRDP: Connection closed: 00:07:08.085 VRDP: Logoff: dlk-mac (192.168.1.22) build 0. User: [192.168.1.20\userid] Domain: [] Reason 0xFFFFFFFF.

[polskafan]

Logfile of RDP connection attempt

[polskafan]

I have the same problem here. Host: Vista x64, Guest XP x86. - No way to connect using a Microsoft RDP Client. Logfile attached. btw, cool ticked id ;)

[Sander van Leeuwen]

Try again with 1.6.0 and report back if it's still relevant. Thanks.

[jhowk]

Still causes an issue when using null authentication in 1.6.0...

00:13:58.867 VRDP: TCP server listening on port 3389.
00:14:35.910 VRDP: New connection: 
00:14:35.965 VRDP: Flags 0x0000001b
00:14:35.968 VRDP: Channel: [rdpdr] [1004]. Not supported.
00:14:35.968 VRDP: Channel: [rdpsnd] [1005]. Accepted.
00:14:35.968 VRDP: Channel: [cliprdr] [1006]. Accepted.
00:14:35.995 VRDP: Failed to process incoming RDP packet: VERR_VRDP_PROTOCOL_ERROR!!!
00:14:35.995 VRDP: The RDP packet content (read):
00:14:35.995 
00:14:35.995 17980eb8 0000: 03 00 01 07 02 f0 80 64-00 01 03 eb 70 80 f8 48 .......d....p..H
00:14:35.995 17980ec8 0010: 00 00 00 09 25 0c 2a fd-ba 18 cd 09 04 00 00 b3 ....%.*.........
00:14:35.995 17980ed8 0020: 43 03 00 00 00 00 00 00-00 00 00 00 00 00 00 00 C...............
00:14:35.995 17980ee8 0030: 00 00 00 00 00 00 00 02-00 14 00 31 00 32 00 37 ...........1.2.7
00:14:35.995 17980ef8 0040: 00 2e 00 30 00 2e 00 30-00 2e 00 31 00 00 00 00 ...0...0...1....
00:14:35.995 17980f08 0050: 00 68 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .h..............
00:14:35.995 17980f18 0060: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
00:14:35.995 17980f28 0070: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
00:14:35.995 17980f38 0080: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
00:14:35.995 17980f48 0090: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
00:14:35.995 17980f58 00a0: 00 00 00 00 00 00 00 00-00 41 00 6d 00 65 00 72 .........A.m.e.r
00:14:35.995 17980f68 00b0: 00 69 00 63 00 61 00 2f-00 44 00 65 00 6e 00 76 .i.c.a./.D.e.n.v
00:14:35.995 17980f78 00c0: 00 65 00 72 00 00 00 00-00 00 00 00 00 00 00 00 .e.r............
00:14:35.995 17980f88 00d0: 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................
00:14:35.995 17980f98 00e0: 00 00 00 00 00 00 00 00-00 d8 07 05 00 06 00 03 ................
00:14:35.995 17980fa8 00f0: 00 12 00 18 00 30 00 00-00 00 00 00 00 a0 0e 00 .....0..........
00:14:35.995 17980fb8 0100: 00 87 00 00 00 00 00                            .......
00:14:35.995 
00:14:35.995 VRDP: Connection closed: 
00:14:35.995 VRDP: Logoff: jupiter (127.0.0.1) build 0. User: [] Domain: [] Reason 0xFFFFFFFF.

[sunlover]

The problem has been fixed. The fix will be included in the future version 1.6.6.