Fedora Servers :: Xdmcp Double Login Block?
Jul 22, 2010
How can I manage to avoid double login to a user account in the server by remote users? Is there a way to block it or to hide logged user accounts?
I have two server, one f12, the other f13 (behind a firewalled router) and want them to serve desktops to anybody in the local network. User accounts in both servers are established as username: user1 password: user:1 , username: user2 password: user2 ....... Every remote user should take an available user on server but no multilogin to the same user. Remote users are no adult so they can mistake. That's the problem. On the remote dektop section unmark everyone can see my desktop didnt help.
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May 1, 2011
When I SSH into any of my Ubuntu 10.04.2 LTS (x86) server installations I get TWO sysinfos. One for current time and another from April 20.
Code:
Linux ubuntusrv1 2.6.32-31-generic-pae #61-Ubuntu SMP Fri Apr 8 20:00:13 UTC 2011 i686 GNU/Linux
Ubuntu 10.04.2 LTS
Welcome to Ubuntu!
* Documentation: https://help.ubuntu.com/
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Last login: Sun May 1 08:45:53 2011 from 192.168.10.198 At first I only notices the 5 packages can be updated. But after runing apt-get update and upgrade as well as trying aptitude full-upgrade without any packages being updated I noticed the sysinfo actually showing two different days. Any idea on how to get rid of the second one?
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Apr 8, 2010
I have got a small queston: I have got several websites and some time ago I decided to delete some of them. As a result there is no virtual hosts on my web server, but if I will go to my_old_website dot ru I will be redirected to one of my current web sites (or if I will paste an ip address in browser), I want to know, how to block this?My virtual host's looks like this now:
Code:
<VirtualHost *:80>
ServerAdmin my_mail
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May 25, 2011
when I login through SSH, I get a double welcome message:
login as: laurent
laurent@192.168.1.2's password:
Linux server 2.6.32-31-generic-pae #61-Ubuntu SMP Fri Apr 8 20:00:13 UTC 2011 i6
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Jan 5, 2011
Possible Duplicate: Basic ssh tunneling through generic linux ssh server/client. I'm have trouble transfering files again from my work PC, which is a linux machine to my home windows PC.My work has changed it so I now need to SSH twice before I can access my PC.So I need to:
ssh username@server.name
password: xxxxx
I then need to do it again.
ssh computer_name
password: xxxxx
I've tried accessing directly via my computers IP but to of no avail. Is there a way I can use pscp or file zilla to ssh twice so I can transfer files?
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Jun 25, 2009
on Debian/Ubuntu in the login form (i suppose it's "gdm") from the bottom right corner I can pick the option to login to a remote XDMPC desktop (that of course I enabled on the other side..) the network is checked for those open XDMCP service and finally, the login box appears and i can remotely login to a "graphic terminal".
How can I do the same in Fedora? I found some guide about Xnest, Xzephyr, but I was totally unable to find a way for doing this simple task.
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Feb 21, 2010
This applies to GDM as well, but I'm using KDM right now so:
Linux 2.6.31.12-174.2.19.fc12.x86_64 #1 SMP x86_64
I setup XDMCP:
/etc/kde/kdm/kdmrc
[Xdmcp]
Enable=true
Willing=/etc/X11/xdm/Xwilling
Xaccess=/etc/X11/xdm/Xaccess
[security]
AllowRemoteRoot=true
DisallowTCP=false
/etc/kde/kdm/Xaccess (link to the xdm 'xaccess' file) includes:
* CHOOSER BROADCAST
In KDM settings I set it to 'no theme' and 'no custom background'. IPTables & SELinux are both off. The client & server are both on the same switch. I can connect successfully. But all I get is a black screen & an X cursor, never get to see the login prompt. Most things I find have to do with the inability to connect at all, but this connects. I'm having this problem on RHEL5.4, CentOS5.4, & Fedora 12. I'm troubleshooting it on Fedora though. I'm not able to even log in.
I must point out that for CentOS5/RHEL5 I got this working, but I didn't do anything differently that I know of. I just repeated the same process over again....but I'm using GDM on those. Is it possible that I may have to use GDM for KDE because it works with GDM? I'd like to get KDM working because that's what it's designed to do right? work the way it's configured. I've not had a chance to look into it with KDM since the time that I posted this thread.
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Jun 16, 2010
I am going through cygwin's XWin.exe (XWin - queary <hostname>) to start a remote session with a RHEL 5.5 workstation. I have run gdmsetup on the worksation to allow the remote connection. Starting the remote session goes off without a problem. After about two hours, it just exits and I have to start over. This is a problem since all my gui's are killed and I have some important processes running.
/var/log/syslog/messages shows:
Jun 15 16:49:53 <host> gconfd (root-12016): SIGHUP received, reloading all databases
Jun 15 16:49:53 <host> gconfd (root-12016): Resolved address "xml:readonly:/etc/gconf/gconf.xml.mandatory" to a read-only configuration source at position 0
Jun 15 16:49:53 <host> gconfd (root-12016): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 1
[code]....
There must be a 2 hour timeout set somewhere - maybe in a gconf xml file?
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Feb 26, 2010
I found this page online. And I thought it was really nice, and I really like the way torrentflux was added, thats a must for me. I am wondering if there is a better approach now, or if this approach is still good, and I was just wondering if someone could double-check the code, see if its good. I have an old dell laying around, and I thought it was finally time to put it to good use. So here it is.[URL]..
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Dec 3, 2009
I use vsftpd, i disabled anonymous users. sometimes i look at the log-files. and there are much entries from bots. they try to connect to the ftp with users like apache or tomcat. they try it 10, 20, 30 or more times. can i block them with vsftpd after 5 failed logins for 1 hour or something like this?
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Jun 19, 2010
My laptop's been locking up in Linux (Ubuntu, Backtrack, Puppy) periodically for a while now. When it locked up, it was always immune to the magic of SysRq, which I thought might indicate a hardware problem. It became so bad that I had to stop using the laptop.
Today, when I turned it on and tried to boot into Fedora 12, I got the following error (just once, it just locked up at various points during the splash screen after this once):
double fault: 0000 [#1] SMP
last sysfs file:
CPU 0
odules linked in:
Pid: 1, co m: swapper Not ta nted 2.6.32.11-99.fc 2.x86_64 #VGN-T 250N
RIP: 0010:[<ff
All the seemingly missing letters were really missing, not my typos.
As you can see, kernel version is 2.6.32.11-99.fc12.x86_64 and my laptop is a Sony Vaio TZ 250N (Core 2 Duo ULV 1.2GHZ). Note that with the other remaining kernels from the updates, nothing ever happened other than the locking up. The core temperatures hover pretty high, about 55-60C peak but this is still below the critical temp. Memtest came up clean when the problem first started happening.
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Mar 22, 2011
I am running a ubuntu server 10.10 with SSH, and OpenVPN. I use it mainly for the VPN, but I have seen log in attempts such as:
Mar 22 14:52:53 UbuntuSvr sshd[2397]: Invalid user support from 85.217.190.69
Mar 22 14:52:55 UbuntuSvr sshd[2399]: Invalid user student from 85.217.190.69
Mar 22 14:52:57 UbuntuSvr sshd[2401]: Invalid user transfer from 85.217.190.69
Mar 22 14:52:59 UbuntuSvr sshd[2403]: Invalid user user from 85.217.190.69
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Is it possible to make it so when some one has tried logging in 5 times with an invalid user/pass that the ip is banned for 10 minutes? I have password auth set to no and am using keys.
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Aug 11, 2009
I keep getting hundreds of SSH failed logins per day. Is there a way with iptables, i can say if a user connects too to port 22 over 8 times in 10 minuntes, then block them for an hour?
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Apr 28, 2011
Is there an ssh or sshd parameter that can be set to block out a user after a set number of attempts tp login ?
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Mar 20, 2010
I am using Fedora 12 and i have enable XDMCP i have boot client with dhcp all is going well but when remote user logout than remote client display XDMCP: fatal error: Session declined Maximum number of open sessions. and after that i have reboot Fedora 12 server than it will work but after logout it will again create same problem.
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May 30, 2009
I can view my website, and ssh in when I've logged in already at home, but if the system gets rebooted, and gets as far as the login screen, I am not able to view the web site or ssh in. I was wondering how to set things up so thatthese services are running independent of logging in.
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Sep 6, 2009
this issue started with F10 and now F11. please how do i login as root during the login prompt or do i need to enable any script of SELinux?
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Sep 16, 2010
How would I get the SSH server to start before I've logged in?Basically, the problem I have is that if I'm connecedt to my computer remotely over SSH, and reboot the machine, I'm not able to SSH back in after it restarts. As far as I can tell, this is because the SSH server doesn't automatically start up until after I've logged in for the first time.How would I get around that? Surely that is a fairly common scenario for network admins (especially ones who have keyboardless and monitorless machines running).
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Jan 23, 2009
I am trying to get fedora-ds running on a machine. I can't log onto the console at all. If I use the command line below the log shows multiple instances on the following lines. fedora-idm-console -D 9 -x nologo
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Jun 14, 2009
I am running NFS and NIS servers in my FC8. Clients are also running FC8. Everything was working fine. I could login remotely to server as well as clients. Suddenly (few days ago) a problem started. I can not login remotely to client machines. I did not do anything. I can login to server remotely, but not the client. When I try to login, it accept password and nothing happens. Also, when I try to login from server to client same thing happens. We share the home directory of the server with client. Another question: there two type of nfs server nfs-user-server and nfs-kernel-server. I just use gui to set up the NFS. I don't know which one I am running. Is there any way to find out which nfs I am running?
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Apr 21, 2010
I recently configured a server that I would like to access remotely. I want to start x through ssh and then log in through vnc, but I get prompted to type in my password in gnome before I have a change to login. Which is a problem because you need to be at the box to enter the password. Is there a way to authenticate this through ssh or give vnc automatic keychain access?
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Mar 17, 2009
On our network, we authenticate our users via LDAP and use autofs to mount their home directories. This works fine in Fedora 8. However, in Fedora 10, when the user logs in, it also mounts the home folders of the users that previously logged onto the system as well. This is what I see when I login as "user1" on Fedora 10
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Apr 18, 2011
I have a problem regarding the ubuntu enterprise cloud. I have installed CC,CLC,SC,NC and a client and logged into thje user interface using my browser for the first time with bith username and passwd as admin and downloaded the credentials.But now as I try to login with the same username and passwd, it says that its an invalid login. I understand we have to change the password on the first login but i don't remember doing the same.
I tried recover password option and gave the user name as admin and email address as my gmail id. It says that I have to follow the instructions sent to the mail, but there is no mail sent I have done it like 5 or 6 times with different mail ids
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Jan 5, 2010
I've been all around the net and can't find a "simple" answer how to block our LAN users from downloading torrents. Is it really that difficult?
Here's our setup:
1. The Server's Configs:
2. sudo gedit /etc/squid/squid.conf
3. sudo gedit /etc/rc.local (to start Firewall rules on bootup)
4. Server NOT a DHCP Server
5. No other iptables rules are configured, just the above ones.
Before in a 1 NIC setup, I blocked Workstations MAC addresses in the Router + Squid Proxy Server (Not Transparent), it worked, but some Online Java Apps didn't work and users can't send/receive email so I abandoned the method.
Now, I installed transparent Squid Proxy with 2 NIC cards, it works, but workstations can still download torrents! I know Squid doesn't block ports, right? So the answer must lie in Iptables Firewall? I basically use Squid just to deny access to Facebook, Friendster, or other "unproductive sites".
Quote:
How to block torrent downloading by using a Firewall? Or is there another "simple" way?
I've heard that it's better just to allow regular ports (80, 22, 465, etc...) then block all the rest, this way, you can prevent unnecessary ports.
I'm not an Iptables/Firewall expert so can you pls. explain it a bit more detailed if that's the case.
I'm also aware of just telling our users NOT to download torrents, but I just want to prohibit it entirely.
I know I will be the most "uncool" employee in our office.
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Sep 14, 2010
The following before.rules file will block all connections from:
Korea
China
India
Russia
[code]....
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Jul 13, 2010
I'm hosting a server with Ubuntu 10.04. I've stumbled upon a strange problem.The server seems to refuse any login attempts, either with SSH or via a TTY after a reboot. After a couple of minutes (about 10 minutes or so) I able to login. The memory usage isn't high at login nor the system load. The auth.log doesn't show any login attempt before.problem? Or does anybody have a suggestion I could try to fix this?
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Sep 19, 2010
What is the absolute quickest or easiest way to block an incoming connection by their IP address? I'm running an apache2 LAMP server on Ubuntu 8.10. For example, let's say I'm watching my server error logs and I see someone using a script to check for phpmyadmin and other such folders. Right away I know this is a hack attempt. Firestarter does not allow ANY way to block an incoming connection by IP (to my disappointment) and adding the IP to an apache configuration file requires an apache restart (way too much trouble and time).
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Mar 16, 2011
I am new on ubuntu and I really don't have any background on making a server. To be frank is I am still a student learning ubuntu server, how to make and configure them.
My problem is that whenever I type the command:
/etc/vsftpd.conf
an error message says that:
-bash /etc/vsftpd.conf: Permission Denied
I am still discovering what are the commands on the vsftpd server. By the way I am using the server on VMware.
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Apr 19, 2011
I want to set up Ubuntu Server as a firewall in which I want to direct my internet connection through where Ubuntu Server will block, filter, and monitor anything that come into either three of my computers using the same internet connection. Is this easy to do? sum up the steps that I will have to go through to establish this, and any relevant information, and where I might be able to find necessary information etc. I plan to use ubuntu-10.04.2-server-i386.
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Jun 23, 2011
i keep receiving this damn annoying spam: Quote: No Cost Website Analysis and Ranking Report Rank mysite.com at the top of the 3 major search engines Do you want to know why your competitors are showing up at the top of the three major search engines and how you can rank on top? To increase the number of visitors to your website it is crucial that you have a top search engine position. If you are like most people, you will spend countless hours trying to get traffic to your website.
Our search engine optimization experts will run a detailed website ranking and analysis report showing you exactly where mysite.com currently stands in all the major search engines along with the recommendations of how we can increase your ranking on Google, Yahoo and Bing. For Your No Cost Analysis Report and More Info Please Click Here
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i get about 30 of those a day, everyday, for a long time. ive asked the ISP to stop it (theplanet.com) they are not responding and the spam continues. i was thinking is there a way that i can tell postfix to reject emails that contain "No Cost Website Analysis and Ranking Report" in their subject? there must be a way but i dont know how.
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