RHEL 6.1 [11]

How to configure Red hat Enterprise Linux 6.1?

Program Ver. : Xmanager 3.0
Connect Method : XDMCP connection

Please follow the instruction below to enable XDMCP on RHEL:

var-log-gdm.rar (7.1 KB)  

send you some logs from /var/log/gdm
The behaviour is the following:
The computer icon appears after some minutes at netsarang. If you double click it nothing happens and the connection failed after some time.
After the connection failed the computer icon dissapears from netsarang.
this is happening to centos 6.1 , centos 6.2 for sure.

All the configuration/firewall/networking is fine.

I have just tested Centos 6.2 on VMware Workstaion 7 and can confirm that XDMCP worked. Here is what I have done:

1. Install CentOS 6.2 64 bit edition on VMware Workstation 7.
2. Configure gdm to allow remote XDMCP connections. Open /etc/gdm/custom.conf and set the following values:

[security]
DisallowTCP=false

[xdmcp]
Enable=true

3. Open /etc/sysconfig/selinux and disable by setting the SELINUX to disable like this:

SELINUX=disabled

4. Add UDP port 177 in Centos firewall (System > Administration > Firewall) settings.

5. Change the run level to 3 with 'init 3' command and brining it back up to 5 by with 'init 5'.

Sometimes VMware network driver can misbehave and prevent Xmanager from accessing the remote hosts. Restarting the PC usually fixes this problem.

Also, if you have 3rd party internet security applications installed, it may prevent Xmanger from receiving incoming connections. Try turning off Windows firewall and 3rd party security suites temporaily to find the cause.


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Technical Support

Of course the steps you mention are absolute necessary.
This is very interesting, so I install at VMWare workstation 8.0.1 the following

Centos 6.2 x86
Centos 6.2 x64
Redhat el 6.2 x64

At both x64 the xdmcp failed. At x86 worked immediately.
All vms have exactly the same settings at /etc/gdm/custom.conf and networking

If you can connect to any one of the Linux hosts, it means Xmanager is installed and running correctly. This is probably a network configuration issue. You can try the followings:

1. Make sure the addresses on all Linux hosts are unique
2. Try restarting the PCs where Xmanager and VMware workstation are installed
3. Add your PC IP address in the /etc/hosts file like the following example:

192.168.1.99 PC_NAME

If the problem persists, please send us the Xmanager log file. To get the log file, wait for the connection failure message and then right click on the Xmanager title bar and select Log > File.


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Technical Support

testing new redhat ent linux 6.3 x64 could not connect. at /var/log/gdm
there messages like:



** (:2623): DEBUG: Client registered with session manager: /org/gnome/SessionManager/Client1

(polkit-gnome-authentication-agent-1:2636): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:2636): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
** (process:2638): DEBUG: Greeter session pid=2638 display=:0.0 xauthority=/var/run/gdm/auth-for-gdm-O7uQym/database
gdm-simple-greeter[2638]: Gtk-WARNING: gtkwidget.c:5460: widget not within a GtkWindow
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x240002b (Login Wind)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.
Failed to play sound: File or data not found