Public bug reported:
I am trying to access a remote computer that does not have a publicly-
routable IPv4 address. Let's say that MyHostName.MyDomain.com has an IP
address of 2001:db8::1. If you look it up in DNS, you get no A records
and one AAAA record.
Using both Remmina and gnome-connections, I am unable to connect to the
RDP servers MyHostName.MyDomain.com, 2001:db8::1, nor
[2001:db8::1]:3389. Tonight, I'm on the same LAN as this server; I
tried connecting to its LAN IPv4 address, and that worked perfectly.
I used `nmap` and confirmed that TCP 3389 is open over IPv4 and IPv6
(the latter available over the WAN, too), and `ss` confirms that `gnome-
remote-desktop` is listening for IPv4 and IPv6 connections.
## Server logs
```
Dec 13 21:37:18 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:358]
[10519:12845] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:37:18 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:459]
[10519:12845] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:294]
[10519:12863] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:395]
[10519:12863] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:38:21 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:835]
[10519:12908] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:38:21 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:936]
[10519:12908] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:181]
[10519:12943] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:282]
[10519:12943] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:035]
[10519:12908] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - rdpdr
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - rdpsnd
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - cliprdr
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - drdynvc
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:383]
[10519:12943] [INFO][com.freerdp.core.connection] - Accepted client:
t[21:38:23:286] [10519:12943] [ERROR][com.freerdp.core.info] - protocol error:
invalid cbClientAddress value: 82
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:23:286]
[10519:12943] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:23:286]
[10519:12943] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
```
## Computers
* Server: Ubuntu 22.04.1 LTS, gnome-remote-desktop 42.4-0ubuntu1
* Client: Ubuntu 22.04.1 LTS, tried both Remmina 1.4.25+dfsg-1 and
gnome-connections 42.1.2-1
## Networks
* Both computers have working IPv4 and IPv6 addresses in a dual-stack
configuration, and both can reach the Internet over either address family.
* The remote computer is behind CGNAT, so IPv6 is my only option.
* The remote computer has UFW rules allowing 3389/tcp and 3389/udp, over both
IPv4 and IPv6.
* The remote firewall permits IPv6 traffic on TCP 22 and TCP 3389 to the
remote server. SSH works fine.
** Affects: gnome-remote-desktop (Ubuntu)
Importance: Undecided
Status: New
** Tags: ipv6 rdp
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-remote-desktop in Ubuntu.
https://bugs.launchpad.net/bugs/1999595
Title:
Cannot connect via IPv6: "invalid cbClientAddress value: 82"
Status in gnome-remote-desktop package in Ubuntu:
New
Bug description:
I am trying to access a remote computer that does not have a publicly-
routable IPv4 address. Let's say that MyHostName.MyDomain.com has an
IP address of 2001:db8::1. If you look it up in DNS, you get no A
records and one AAAA record.
Using both Remmina and gnome-connections, I am unable to connect to
the RDP servers MyHostName.MyDomain.com, 2001:db8::1, nor
[2001:db8::1]:3389. Tonight, I'm on the same LAN as this server; I
tried connecting to its LAN IPv4 address, and that worked perfectly.
I used `nmap` and confirmed that TCP 3389 is open over IPv4 and IPv6
(the latter available over the WAN, too), and `ss` confirms that
`gnome-remote-desktop` is listening for IPv4 and IPv6 connections.
## Server logs
```
Dec 13 21:37:18 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:358]
[10519:12845] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:37:18 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:459]
[10519:12845] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:063]
[10519:12845] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:294]
[10519:12863] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:37:19 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:395]
[10519:12863] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:37:20 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:998]
[10519:12863] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:38:21 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:835]
[10519:12908] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:38:21 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:936]
[10519:12908] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.info] - protocol error: invalid
cbClientAddress value: 82
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:939]
[10519:12908] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:181]
[10519:12943] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_CONTINUE_NEEDED [0x00090312]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:282]
[10519:12943] [WARN][com.winpr.negotiate] - AcceptSecurityContext status
SEC_I_COMPLETE_NEEDED [0x00090313]
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:122]
[10519:12793] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:45:363]
[10519:12793] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:094]
[10519:12816] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:36:46:323]
[10519:12816] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:18:331]
[10519:12845] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:560]
[10519:12845] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:19:273]
[10519:12863] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:37:20:496]
[10519:12863] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:810]
[10519:12908] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:035]
[10519:12908] [INFO][com.freerdp.core.connection] - Accepted client: thinkpad
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - Accepted channels:
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - rdpdr
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - rdpsnd
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - cliprdr
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.connection] - drdynvc
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.gcc] - Active rdp encryption level: NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:21:036]
[10519:12908] [INFO][com.freerdp.core.gcc] - Selected rdp encryption method:
NONE
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Client Security: NLA:1
TLS:1 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Server Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:22 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:160]
[10519:12943] [INFO][com.freerdp.core.connection] - Negotiated Security: NLA:1
TLS:0 RDP:0
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:22:383]
[10519:12943] [INFO][com.freerdp.core.connection] - Accepted client:
t[21:38:23:286] [10519:12943] [ERROR][com.freerdp.core.info] - protocol error:
invalid cbClientAddress value: 82
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:23:286]
[10519:12943] [ERROR][com.freerdp.core.peer] - peer_recv_callback:
CONNECTION_STATE_SECURE_SETTINGS_EXCHANGE - rdp_recv_client_info() fail
Dec 13 21:38:23 MyHostName gnome-remote-desktop-daemon[10519]: [21:38:23:286]
[10519:12943] [ERROR][com.freerdp.core.transport] - transport_check_fds:
transport->ReceiveCallback() - -1
```
## Computers
* Server: Ubuntu 22.04.1 LTS, gnome-remote-desktop 42.4-0ubuntu1
* Client: Ubuntu 22.04.1 LTS, tried both Remmina 1.4.25+dfsg-1 and
gnome-connections 42.1.2-1
## Networks
* Both computers have working IPv4 and IPv6 addresses in a dual-stack
configuration, and both can reach the Internet over either address family.
* The remote computer is behind CGNAT, so IPv6 is my only option.
* The remote computer has UFW rules allowing 3389/tcp and 3389/udp, over
both IPv4 and IPv6.
* The remote firewall permits IPv6 traffic on TCP 22 and TCP 3389 to the
remote server. SSH works fine.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-remote-desktop/+bug/1999595/+subscriptions
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