Fedora :: X Forwarding Over SSH In A VNC Session - No Xauth Data?
Jun 16, 2010
Here is my setup:
Machine A (fedora, gateway on remote network)
Machine B (fedora on local network)
Machine C (Vista on local network).
I want to connect to machine A from C and run graphical apps on it. I figured that installing a vnc client will be easier then X server (last time I tried X server on windows it did not end well). To ensure security, I vnc into a local linux box (machine B) and then ssh over to the remote box. When I ssh (with the -X param) into A from B, everything works great including the graphical apps. However, when I vnc into B from C and then ssh into A, I get the following message:
Warning: No Xauth data; using fake authentication data for X11 fowrard If I then try to run a graphical app I get cannot open display:
localhost:11.0
why does X forwarding work directly and not through vnc?
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Dec 20, 2010
i wanna use the x11-forwarding feature to connect me to an open session. is that possible? i have a linux-machine on which runs the jdownloader. the jdownloader is only as java-gui-only-tools available. so it runs always on a open x11-session on the linux-machine. i wanna configure this tool from everywhere. how can i make this? (if it is possible i wanna use x11-forwarding).
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Jan 11, 2011
Apache proxy with tomcat is working fine. The thing is that jsp sessions are not working through the proxy. How can I make it work?
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Jul 7, 2011
I need applet which shows the total data usage (In+out) (of the current session or since the uptime) on the panel.I searched a lot, but everytime I had to click somewhere to see my data usage. I don't want that. I want my data usage displayed regularly on the panel.
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Oct 11, 2010
I'm new to this forum and pretty new to the Linux world. I'm currently working for someone and learning this as I go along and we want to be able to set up a machine so that we can display some kind of internet browser in a type of kiosk mode (without the fullscreen) on the gdm login page.
I've been able to find a browser to do that but we cannot edit how the gdm login screen boots to include the browser. I was told to try to see if I could remotely access said machine to start the browser on the same display as the gdm login which happens to use display :0. When I tried experimenting with xclock first, it would not let me run it on the same display short of me using xhost + command. I was told to try to use the xauth application to create my own authority file and allow permission but I don't know how to do this. I've tried several different combinations I've found on other forums and none seem to have worked.
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Jun 27, 2010
No sure exactly what the problem is here? I am trying to get a X app running from a remote site on my desktop. I am using this proceedure:xhost +remote host xauth on local host the get 'Cookie'.
scp Cookie to remote host
xauth merge Cookie into .Xauthority
ssh to remote.
export DISPLAY=local host:0
xfig
xfig fails with "Error: Can't open display: local:0"
If I start another X using '-ac' ( not authinaction) and put to local:1 , all is well.
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Oct 10, 2010
Everything worked fine for several updates to the final system, now suddenly when trying to login dropping out at runlevel 5 and login. When doing login the system starts as root with startx but not as user. This is for me a permission problem. Only: I did not change the permissions and I did not log into as a root-X system. I just did set the permissions in yast to secure. Nothing else. The system complains:
[Code]...
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May 2, 2010
I've been using exmh as my mail reader for years. It's written in tcl/tk and uses the tk send facility to communicate with a background process. This communication depends on properly configured Xauthority.After upgrading from 8.04 to 10.04 I get X server insecure (must use xauth-style authorization)I've removed and re-installed tcl8.4 and exmh to make sure it's not a package problem.The XAUTHORITY env variable is set up properly. xauth shows the proper cookie:xauth> listjohn/unix:0 MIT-MAGIC-COOKIE-1 9d2c3ae970c352a0d21159190d9e5530Access control is enabled.I'm at a loss where/how to proceed. I need to get this working, it's not reasonable at this stage to switch to a different mail client.
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Jun 3, 2011
[URL]
We have the same problem but tried his solution to no avail.
Doing a shh would give me an error..
Quote:
usr/bin/xauth: timeout in locking authority file /var/www/html/felipe/.XauthorityServer sent command exit status 1
When I change SElinux to permissive from enforcing I can login but turning back to enforcing, the problem comes back. I did the following...
Quote:
[felipe@nimitz ~]$ ls -Z .Xauthority
-rw-------. felipe felipe unconfined_ubject_r:httpd_sys_content_t:s0 .Xauthority
[felipe@nimitz ~]$ ls -lZd
drwxr-xr-x. felipe apache system_ubject_r:httpd_sys_content_t:s0 .
[felipe@nimitz ~]$ ps -eZ|grep sshd
[code]....
I tried to create a new user with the default directory in /home and it work fine.
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Jan 21, 2009
I was having problems getting xterm to work via ssh -Y and the problem was that xauth was not installed when I did yum install xterm
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Jun 15, 2011
on boot I got a message that (part of) level 5 was skipped, and I ended up on console. So I tried startx but get this message (probably the reason boot failed also):
xauth: file /home/kostas/.serverauth.3396 does not exist
Fatal server error:Cannot move old log file "/var/log/Xorg.0.log" to "/var/log/Xorg.0.log.old"
consult the The X.Org Foundation support at X.Org Wiki - Home for help.
xinit: giving up
xinit: unable to connect to X server: Connection refused
[code]....
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Mar 8, 2011
I am using Fedora 14 x86_64 as the host and Windows XP under VirtualBox 4.0.4. I have added two ports (TCP and UDP) to the firewall settings in 'other ports' in the Fedora firewall setings. Do i need to do this?I noticed the port forwarding option in the Fedora's firewall settings which asks for either the ports to be forwarded to either local or an ip address. Do i need to do anything here?
In the settings under VirtualBox under Network adapter 1 (which is enabled) and attached to NAT, there is a port forwarding option in the advanced settings. Can the host and the guest port be the same number? If i use 'open port checker' to check if the tcp port is open in windows xp, will it work as it does in firefox under Fedora?
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Dec 12, 2009
I have just set up shorewall on my router running Arch Linux. The external network is on eth0 and the internal network on eth1.I have set it up for masquerading and that works fine and I can open ports to the firewall. But I'm having trouble with port forwarding to my internal machines.The problem I have is that when port 22350 is forwarded to 192.168.1.3 on my local network, checking the port with nmap from a remote computer gives me:
Code:
PORT STATE SERVICE
22350/tcp closed unknown
[code]....
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Jul 22, 2010
How to set the display size avoiding taking up the whole screen.e.g.$ ssh -XC -c blowfish user@ip_address display:1 "gnome-panel"Does it take up the complete screen?
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Jul 22, 2010
I have a server that sits between two LANs, and I wish to enable multicast routing from one LAN to the other. I have multicast routing enabled in the kernel but didn't know how to enable it. Tried to add mc_forwarding in /etc/sysctrl but doesn't work.
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Apr 12, 2010
hypothetically speaking, can i write a script in which a telnet session is opened and then some more commands are forwarded to that session?
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Nov 10, 2010
I have a very bad attempt at hashing the components of an tcp session to assign/locate the session in a hash table bucket. I am pretty sure that it has a very high collision rate and when there are a very large number of tcp sessions my application is having to search a long linked list to find the session within the bucket.
All the hashing functions I have found take a single string input where I need to input several integers and hash them into a single result. My guess is that any real hashing function is going to produce better results than what I am currently doing.
[Code]...
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Mar 22, 2009
I have a question regarding port forwarding. I have a fedora server, with two eth cards: eth0 ---> external IP, eth1 ----> LAN IP I use SNAT for connection sharing. I also have an internet domain hosted on this server... let's call it [URL] Anyway, one of our computers in the LAN has some kind of web server on it, which must be accessed from the internet on the port 23700.
So, using iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 23700 -j DNAT --to 192.168.1.25 (the IP of the network computer) Everything works perfectly fine from outside the lan. When I type [URL], I connect to that computer. My problem is that inside the lan, typing [URL] does not work! It only works if I enter it by IP 192.168.1.25:23700 Is there any way to make the server forward my request to that specific computer even if I'm inside the LAN?
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Apr 23, 2009
I am running Fedora Core 10 and KDE 4.2.1. My KTorrent is having trouble finding online peers lately. I suspect this is a port forwarding issue. I have set up my router to forward port 4444 (UDP) and port 56000 and more (TCP) to my machine's IP address. I have also set my local firewall (system-config-firewall) to allow these ports through.But when I try to test ports 4444 and 56000 via this Open Port Check Tool, it tells me they are closed
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Jun 2, 2010
Okay I have searched how do I enable ipv6 forwarding?
There is no ip_forward in /proc/sys/net/ipv6/
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Mar 31, 2011
I'm trying to implement remote NFS in our network
So I read a lot of posts on the Internet, but I don't understand which ports I have
to open/forward for this.
On some posts I see a lot of ports, I don't want to do this.
If this is the case, and I would set up NFS through an ssh tunnel, then do I only need the ssh port and does this mean it will always work if the server is reachable through ssh?
Or is this wishful thinking ?
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Jun 7, 2011
I installed Fedora 15 to my server. I preffer to work over SSH and I enable X forwarding. My configurational file:
/etc/ssh/sshd_config:
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
From my laptop I run next commands
ssh -X user@xx.xx.xx.xx
startx
and the session start on server, no redirect occur. Next output I saw in terminal
[Code]....
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Oct 2, 2010
How do I setup Self Port Forwarding on Fedora 13 x64 How Port Forwarding Works Port forwarding allows access to a local area network by a remote user through forwarding ports that provide ftp access and web server access. The operating systems use a kernel or ipfirewall to carry out the port forwarding process.
There are several different ways that port forwarding is accomplished. * Self Forwarding: Self forwarding is port forwarding that is accomplished on a local area network that has multiple computers connected to the network. Since all of the computers share the same IP address, the port forwarding must be conducted within each computer on its own system. If the local area network router has a network access translator then the computers that are connected to the router must also do port forwarding within their own system.Port forwarding can be accomplished with Unix systems however the port can only be accessed by the root administrator. This is a less common method of port forwarding due to the fact that using a root administrator poses risks to the system because the users will often take a detour to a higher port number to gain faster access to the server.Double port forwarding involves the use of multiple routers that join computers on a local area network. As a result, the ports on one router are forwarded to another router that acts as a gateway. The gateway router then forwards to a host on the local area network (LAN). This type of port forwarding involves the communication of several components which include the session server, session client, and session port. When the user establishes a connection the session server will connect to one of the session ports that are to be forwarded which will in turn, forward the port to the session client. Reverse port forwarding is used when access is required to a port that is protected behind a firewall.
While port forwarding is convenient, there are a few things to be aware of when using this type of technology. If you use port forwarding only one port can be used at a time and the machine that is receiving the port forwarding can only view the information as coming from the router instead of the original machine. Additionally, port forwarding can open up network access to other machines that may be able to find the port forwarding by gaining unauthorized access. I know how to setup port forwarding in my router along with Dyndns.org free ED, but my local area network has multiple computers connected to the network on my router. All of the computers share the same external (public) dynamic IP address; when I setup port forwarding only my Web Server can access the internet, so how do I setup Self Port Forwarding on Fedora 13 x64
[Code]...
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Mar 9, 2010
Firstly I remote login to a PC by telnet/sshAfter thatI type vncserver in the terminal.Then I gotvncserver: couldn't find "xauth" on your PATH.May I know what it is about and how to setup vncserver?
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Feb 10, 2009
I've recently installed OpenVPN on my dedicated server (Fedora) in order to have full internet access for all of my WinXP clients. In case somebody is interested in the details of the OpenVPN installation, I followed this documentation: Rootserver-as-OpenVPN-Gateway. The installation runs quire nicely, I'm able to surf the net and even file-sharing programs work on the XP clients - at least to some extent. There is a slight problem though: the file-sharing programs complain that they have a "NAT problem" or that they are "Firewalled".
Most likely, this problem can be addressed by configuring remote port forwarding (RPF) on the server. The only routing rules which I've added on the server during the OpenVPN installation are these:
Code:
# initialize natting for openvpn
iptables -t nat -F POSTROUTING
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -s 10.66.66.0/24 -j MASQUERADE
Let's assume a certain application on a client is listening on e.g. port 1234. How do I configure RPF for this port on the server side.
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Nov 24, 2009
My X crashes when I...
1) ssh to a remote centos server using X11 forwarding
2) open the virt-manager remote application (the virtualization management app)
3) Open the remote console
Just to be clear, my local X11 crashes. I get back to the log in screen.
I get in my Xorg log:
Backtrace:
Fatal server error:
-Is this enough for a bug report?
-How I can make X dump a core file for better debugging?
-Do -debug RPM packages still exist, and if so, should I install one for the X server and will this help with debugging, and if so, how do I install it.
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Oct 29, 2010
I have a set up with a computer that has two network cards and is connected to two networks. Both networks connect to the internet via separate routers that have DHCP enabled. I can set one of the routers up to do port forwarding to the computer without any complications but if I want to do the same on the other router the port forwarding from it doesn't work and I can't reach the system.
I know for a fact that the services are accessible from both networks and both routers can forward ports to other computers in their network. The networks are 10.10.0.1/24 and 172.22.0.1/24. I've tried turning off iptables but that didn't change anything.
Is there any kind of setting that could prevent the interface on the computer to reject traffic using NAT or something?
If I disable the interface on the working network (ifdown eth1) then suddenly eth0 on the other networks starts accepting requests sent to it via the router that does the port forwarding. I do however want to emphasize that services work just fine as long as the requests originate from either of the networks they are on.
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Jun 23, 2010
I am accessing a LINUX cluster machine via the internet from my PC. My PC is using Windows XP. To access the cluster I use VPN Client and PuTTY. I can access the cluster from my PC without any problems as long as only the command line and no graphical interface are involved. To allow for graphical interface I installed Xming and I enable X11 forwarding for PuTTY. However, the graphical interface/output of the program I am using (GrADS) does not appear. Instead I get the error message ?Segmentation fault?.Does anyone know what what I need to do in order to see graphical interface/output via PUTTY
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Nov 1, 2010
Is there a session manager I can use with 10.10? I would like to try Openbox but am not sure how to select it as a startup session. I would like to be able to choose between kde, gnome and openbox.
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Dec 7, 2009
If I forward port 5764 to port 80 to my VOIP device, I can nmap and get a proper connection. If I forward port 5764 to port 22 to my server, it comes up filtered. It even happens if I try forwarding port 80 to my server. So I'm sure it has something to do with my server, but I'm not sure.Here's my Linksys iptables:
Code:
:wanin - [0:0]
-A FORWARD -i vlan1 -j wanin
[code]....
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