Ubuntu Networking :: Ssh Client Wont Connect?
Sep 10, 2010
Ok so i have a server in which i have setup dyndns setup so that i can use an address such as example.com to connect to my server. The server has openssh installed and it is configured properly.
What I can do:
Code:
Connect to server (locally) from linux terminal
Connect to server (locally) from windows putty client
Connect to server (Over Internet) from windows putty client
What I can't do
[Code]...
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May 20, 2009
I have the following problem:I have to networks in remote places.I have an opnvpn client in one network that connects to the the router (openvpn server).My question is,can i connect the network where the openvpn client is,throught the computer with the client to the other network.If yes,how? (please make it an idiot proof anwser because i have limited knowledge about iptables). I was thinking like forwarding (the router in the network with the openvpn client is also firewalling with iptables) the request of the ip class of the openvpn network to the computer with the client,which masquarades the interface
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Dec 3, 2010
When I try to connect to my company's VPN using the Cisco VPN client, I get a kernel panic. Please don't suggest I should Cisco's client, it only works with Kernels older than 2.6.24 (I have 2.6.35).
So I use vpnc. The error message is:
Quote:
$ sudo vpnc
[sudo] password for phirt:
Enter password for user@group@fubar.net:
received notice of type (ISAKMP_N_NO_PROPOSAL_CHOSEN)(14), giving up
vpnc: quick mode response rejected: (ISAKMP_N_INVALID_MESSAGE_ID)(9)
this means the concentrator did not like what we had to offer.
Possible reasons are:
[Code]...
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Mar 22, 2011
I was wondering if there was a way to connect over ssh "backwards". For example, lets say there's a client connected to example.com via ssh from behind a router. Well you wouldn't be able to ssh to that client unless the proper ports were forwarded on the router right? So I'm wondering if there would be a way to connect to example.com through ssh then from there connect to the client using the already existing ssh connection.
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Feb 16, 2009
in my office all users connect to internet via VPN.in our office there is one special server that we want when users connected via VPN,users can not connect to the special server and when users are not connect to via VPN can connect to that server.
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Jan 5, 2010
More for my own posterity than anything else, I thought I'd document here the way to get to eDesktop through linux (debian, ubuntu) at the University of West Florida (UWF), since they appear to only support Windows through their documentation on the University web site, and the link through Argus (the secure web site) doesn't work in Linux. This is sometimes needed to use the University resources (libraries and computer programs) from remote locations, and otherwise a google search is fruitless. I had to have a guy in the computer science department show me how to do it.This may apply for other Universities with similar setups.
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Jul 29, 2010
I have a Windows machine on which NX Client has been installed. I wanted to test if I could access my Ubuntu box. The Ubuntu Box has NX Server, Node and Client installed. When I try to log in from the Windows machine using NX Client with my Ubuntu username and password I get an error connection refused.
The following service is running: OpenBSD Secure Shell server sshd How can I resolve the issue?
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May 26, 2011
I have configured server ubuntu 11.04. Everything works fine, but there is a need for some clients to connect local hard drive. What should I do? How and what modules are added to the ltsp-image? How to register in the fstab on the client? Maybe I'm going the wrong way?
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Feb 4, 2010
has anyone been able to connect a Linux VPN client to a safe@office 500 using pre-shared keys?From windows, I can establish a IPSec/L2TP(also PSK) connection with no issues(No third party software. Just created a new connection in XP).I have tried using StrongSwan and xl2tpd on Karmic without success.PPPd never gets launched. To me it seems like this should work given I can create a vpn connection directly from WinXP without installing any checkpoint clients.
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Nov 19, 2010
I want to use FTP client (for example ncftp) to connect in active mode. I have firewall (iptables) on my laptop and most of time I am behind rooter. With outgoing packets and with passive mode all is working fine.But some sites accept only active mode.I could open some port range in firewall and in rooter for active data packets, but I don't know how to solve security issues.So how should I correctly manage active ftp connection?
How can I set data port range when opening active connection with ncftp (or maybe another ftp client)?How can I limit that incoming connections to that ports range is accepted only by ncftp or else dropped?
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Feb 3, 2011
Linux VPN client exists which will connect to a Sonicwall firewall?
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Feb 24, 2010
I am not exactly newbie with GNU/Linux, but definitely new to SSH/NX stuffs. I followed the below tutorials for installing FreeNX so that I can access my desktop like TeamViewer in windows.
https:[url]....
https:[url].....
But I don't see the folder NX like the one mentioned here.Then edit the file /usr/NX/etc/server.cfg
I don't see a folder called NX to proceed. Also when I use nomachine client to connect from Windows, it couldn't connect and I get the below errors.
nxssh: <host-name>: no address associated with name.
how to make connect to freenx server from windows using nomachine client?
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Sep 10, 2010
I'm running Lucid on a laptop client and a desktop server. The server has windows partitions that I'd like to connect to from the client using nfs over a wireless link on my home network. Is this possible? (I'm currently using samba but find it slow and stalls shutdowns on the client.)I've successfully connected to ubuntu partitions on the server via nfs, but most of the data is on the windows partitions, and must remain there.
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Sep 17, 2009
I'm trying to connect to a Microsoft ISA PPTP server from my Linux box. The box I'm connecting from is itself a router. I have no problem connecting a Windows XP machine to the VPN via this machine. This is fine, but I would rather connect via the Linux machine, giving me far more advanced routing options (i.e. no to send every packet from the XP box completely unnecessarily via the PPTP tunnel). The Linux router is running Debian Lenny.
I've checked iptables. There were initially some issues. I've fixed those.
Invoking pppd from the console, I can see that authentication succeeds, but then some negotiation goes wrong and the server terminates the connection. Here's the output from pppd, with the more sensitive stuff removed:
Code:
<hostname>:~# pppd call <peer> nodetach debug
using channel 19
Using interface ppp0
Connect: ppp0 <--> /dev/pts/2
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe3e45f75> <pcomp> <accomp>]
code....
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Jan 6, 2011
trying to create a "local network" by directly connecting an IBM Thinkpad with Debian Linux installed on it to an Alix computer running Voyager Linux. I'm following a "how to" I found to create a music server, hence the requirement. My issue is I can't get a static IP address to be configured on the Debian machine.I've trawled the net and have found the instructions about editing the /etc/network/interfaces and have tried to do this. First I tried to get DHCP working so I could connect the Debian machine to the net and this proved successful. I edited the interfaces file to look as follows:
# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
Then I tried adding a static IP address to the machine. As this is a network purely between two machines I made up the IP addres and used 192.168.0.1 and used a NetMask calculator to give me a NetMask of 255.255.255.254 (I told the calculator there would be 2 machines on the network). I then edited the interfaces file as follows:
# The loopback network interface
auto lo
iface lo inet loopback
[code]....
I re-booted the machine (ifdown eth0 followed by ifup eth0 keeps saying that eth0 hasn't been configured - a problem there that I don't understand), but during boot up time it failed to assign the Static IP address to eth0 and made me go into SU mode. To fix it I simply replaced the interface file with the static IP inputs with the file that had the DHCP entries (I'd made a copy of the DHCP file), and re-started the machine. Everthing came up fine. So the first question is how do I get a static IP address to be assigned to eth0 such that whenever I shut down and restart the machine the static IP address is always loaded?
The second question is around creating the network via the cross over cable. From what I've found via Google, all I should have to do is create a static IP address on the Debian machine and a static IP address on the Voyager machine. Once they're connected by the cross over cable they should see each other. Is that correct, or do I have to do anything else?
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May 6, 2010
xrdp
gnome
ubuntu 9.10
I have xrdp installed running on the PC. how to allow remote Linux PC to connect Ubuntu 9.10?
Do I need to install;
libcurl4-openssl-dev
libpam0g-dev
vnc4server
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Oct 13, 2009
I bought VPS Linux server, but i would like remote desktop thought NX Client. Firstly I installed on server ubuntu like this:
Code:
gpg --keyserver keyserver.ubuntu.com --recv-keys 493B3065 && gpg --export -a 493B3065 | sudo apt-key add -
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install kubuntu-desktop
Then I proceed as described in this tutorial:
Code:
[URL] but it's not work when I try loging to the server via NX Client. Then I try this tutorial:
Code:
[URL] but I don't receive public key (when I put this code sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 2a8e3034d018a4ce) .
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Mar 12, 2010
I'm trying to set up a private irc server. I install ircd-ircu, modify the configuration file, restart the daemon, and everything works great. After the next server reboot, the server shows the daemon is running, but I can no longer connect to the server from my irc client. I've tried restarting the daemon with no luck. I can then uninstall and reinstall it with the same outcome. Everything works initially, but after rebooting, the irc client can't connect..
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Aug 4, 2011
I am looking for a softphone that I can connect over a client VPN to my cisco uc520. It works great in windows. Does anyone know of one that works? Cisco doesn't seem to have one that runs in linux.
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Oct 10, 2010
I got the following message when starting the Jack Control.
Could not connect to JACK server as client.
- Overall operation failed.
- Unable to connect to server.
Please check the messages window for more info
15:25:37.902 Patchbay deactivated.
15:25:37.903 Statistics reset.
15:25:38.020 ALSA connection graph change.
15:25:38.216 ALSA connection change.
15:25:39.777 Startup script...
15:25:39.779 artsshell -q terminate
sh: artsshell: not found
15:25:40.182 Startup script terminated with exit status=32512.
15:25:40.183 JACK is starting...
15:25:40.183 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p1024 -n2
15:25:40.190 JACK was started with PID=2052.
no message buffer overruns
jackd 0.116.1
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Jan 23, 2011
This is my first attempt at a server, and I running Ubuntu 10.04 server. I had to reconfigure my network, so now I am attempting to use it as a server. I have a Linksys WRT54G2 connecting various machines-- Windows XP, Ubuntu builds, and LinuxMint 10 Julia.
The long and the short of it is that the server connects to the Internet-- I can get updates and install programs via terminal. The server also connects to the router, as tested by pings. The client computers all ping back and forth nicely, and I can access the file share via FTP from the local side and externally (this is part of a larger network).
How can I get it so that my client computers can access the Internet through the router and server?
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Feb 3, 2011
I am running CentOS release 5.5 (Final) with PROFTP installed.
I am able to connect to the ftp server from local, but when I try it from dream weaver CS5 it can't connect to the server. I ran a port scan and 21 seems to be open:
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
53/tcp open domain
[Code]....
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Nov 19, 2010
I followed this tutorial:
http://www.howtoforge.com/virtual-us...l-ubuntu-10.04
Minus the Quota for the mailboxes, since I don't really care about that. But I don't think that should cause any problems in the configuration.
The server is in my local network.
I tried to connect with Thunderbird and Kmail. Kmal brings up an error message eventually, saying something about a time-out.
Squirrelmail says code...
I searched everything & everywhere only to see that more people have that same error message come up with Squirrelmail. From my understanding some have fixed the issue but I couldn't actually find a solution to this.
Does anyone know how to fix this?
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Aug 13, 2010
Until today I have never encountered problems taking over my old Windows-machine. But now it doesn't work anymore... Could it be that something changed with an update of my Ubuntu (10.04) which caused this?
The Windows machine does not update or change, and I cannot imagine that I changed something myself at that machine...
I can still reach it using "smb://192.168.1.33/"
But when I try Remotedesktop Client with that IP it gives the message;
Error (grdesktop)
Autoselected keyboard map en-us
ERROR: 192.168.1.33: unable to connect
When I try using Terminal Server Client (I read in another thread that could solve the problem) I get the same response...
Where can I find out what the problem is?
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Mar 20, 2010
I have reinstall my server. I think everything was okey. But i can not connect my server with NX Client.
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May 22, 2011
until 2 weeks ago I had o.S11.3 on both my Siemens and Asus laptops. I have installed NX No Machine. ( I know it's not open source,I am using the free version). With commandline ( root) /usr/NX/bin/nxclient I was able to connect to the other machines. I got Qt: Locales not supported on X server, the NX menu popped up and I was able to connect by inserting resp codes. After fresh install of o.S.11.4 on the ASUS the commandline (root) answers:
xlib: connection to":0.0" refused by server
xlib: No protocol specified
nxclient: cannot connect to X server:0.0
The ASUS can still be reached from the other machines (one with o.S.11.3,the third one with o.S.11.2 ) SSH ( Lan)connections are all working forth and back between the machines, even to and from Win XP, however only from Win 7 on the ASUS, but that's a Win7problem. Comparing the installed xorg-x11- server-extra : on o.S. 11.3 Additional X servers ( Xmdx,Xephir,Xnest,Xvfb ) ,on o.S.11.4 the Xvfb is missing, might that be the reason?
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Mar 25, 2010
I am getting this error when i try to connect a client to a server in windwos ,anybody knows why ?
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Jan 28, 2010
So a while back I was able to mount a directory from my OpenSuse server as a NFS on an Esxi server. After restarting the Esxi server, the NFS became inactive and I was unable to remount it. The error given was that the Esxi client was unable to connect to the Suse server. I was looking into the showmount -a command on the Suse server and it showed the mount point on the Esxi server. Could this be causing the Suse server to reject new attempts to mount the directory? What else can I try to fix this problem? Also I should note that both servers can ping each other.
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Oct 5, 2010
I recently donwloaded boinc and every time I launch I get this error "cannot connect to core client." I went through the guides and opened port 31416 in external zone, am I doing this right? The guide said to put it in the DMZ, what's the difference?
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Dec 2, 2009
I have Samba PDC server on CentOS 5..we have 10 thin clients in our network which were working fine previously with the windows Terminal services... Now i have replaced my windows 2003 Domain to Samba Domain Controller.. Is there any why i can connect our thin clients with SAMBA DC in the our environment?
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