Bug 442196

Summary: gdm rejects any X11 TCP requests despite 'DisallowTCP=false' in custom.conf
Product: [Fedora] Fedora Reporter: Philippe Leclercq <philec>
Component: gdmAssignee: jmccann
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 8CC: cschalle, rstrode
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Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2008-04-12 23:56:24 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
libpcap trace of failing X11/TCP transaction
none
gdm custom.conf file under /etc/gdm none

Description Philippe Leclercq 2008-04-12 17:13:29 UTC 
gdm rejects any X11 TCP requests despite 'DisallowTCP=false' in custom.conf

Description of problem:
gdm Window Manager ignores the 'xhost +' cmd and rejects any incoming X11/TCP
requets despite the 'DisallowTCP=false' added to the custom.conf file.

Version-Release number of selected component (if applicable):
Fedora 8

Steps to reproduce :
prerequisite :
---> custom.conf must override unmodified 'default.conf' file, allowing TCP
access for X11 requests ( see file hereby attached )

1. on the Fedora 8 X/gdm server, issue the 'xhost +' command in a terminal window
[philec@philec-linux ~]$ xhost +
access control disabled, clients can connect from any host

2. rlogin or telnet to any other Linux, Solaris, HP-UX, AIX
3. initialize and export the $DISPLAY variable
[philec@philec-pro ~]$ export DISPLAY=philec-linux:0.0 
4. launch the 'xterm' command on the remote system
[philec@philec-pro ~]$ xterm
xterm Xt error: Can't open display: philec-linux:0.0


Expected results:
xterm window starts on the 'local' X/gdm server

Additional info: 
When sniffing the X11/TCP transaction, the Fedora 8 clearly returns a 'host
administratively prohibited' ICMP packet ( see trace attached )
Comment 1 Philippe Leclercq 2008-04-12 17:13:29 UTC 
Created attachment 302234 [details]
libpcap trace of failing X11/TCP transaction
Comment 2 Philippe Leclercq 2008-04-12 17:15:26 UTC 
Created attachment 302235 [details]
gdm custom.conf file under /etc/gdm

main default.conf file in /usr/share/gdm remains unmodifed
Comment 3 Philippe Leclercq 2008-04-12 23:56:24 UTC 

*** This bug has been marked as a duplicate of 243551 ***