Ubuntu Networking :: Administer A Server From A Remote Network?
Jun 27, 2011
I have Ubuntu 10.4 Server, it's a local intranet server in back of a router in a "standard" home network. As I understand it laptops, PCs and the server are "hidden" from direct contact with the internet by Network Address Translation [NAT]. The router is a Linksys WRT54G all clients are connected to it, and the router itself is connected to a modem provided by the ISP. The server was given a static IP address. To admin the server I connect from a local client with SSH and get a command-line.
Is there a way to admin the server if I am a thousand miles away from this local network? Putting it another way, Is there a way to "tunnel" through to the server, give the user/pw and get a command-line from the internet? What software or hardware is needed?
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Jan 3, 2010
I've a problem on--how to administer a mailing list on qmail by list owner himself?
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Dec 12, 2008
I'm putting a new system in my wife's classroom that I would like to be able to maintain remotely. I won't be able to ssh into the system becuase it is on a highschool network that I have no control over. I have a VPN running at home so I could setup the system to connect to that, but I'm not sure how reliable that is plus I will then probably have to setup two NICs so that the system can also be present on the school network. Seems to add complexity and possible problems.
Are there other options here? I will do the research, I just need a starting place.
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Jul 7, 2010
I have a set of iptables I have downloaded and modified for my use. I had it working for 1 lan and wan access. I now would like to have: wan access, 1 lan, and 1 wlan. I need to administer the entire network from my wireless laptop on the wlan network so I need to be able to access the lan from the wlan network, and have the wlan access the lan network. Here are my rules:
#!/bin/sh
# IPTABLES FIREWALL script for the Linux 2.6 kernel.
# This script is a derivitive of the script presented in
# the IP Masquerade HOWTO page at: [URL]
# It was simplified to coincide with the configuration of the sample system presented in the Guides section of [URL]
# This script is presented as an example for testing only and should not be used on a production firewall .....
echo -e " Firewall server rule loading complete "
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Feb 7, 2011
I have a web server with LAMP and wordpress on it. I'm going to administer wordpress from a different host on the same LAN as the server (the server doesn't have X and desktop software on it). When you build a site, with wordpress, from a separate admin host what exactly is happening?. Do browser requests from the admin host go to the web server, then out to the Internet, then back to the web server, then the results get displayed back to the browser on the admin host?. Or does it work differently?. Will such a set up work automatically after the installation and basic configuration of LAMP and wordpress on the web server?.
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Jan 5, 2011
I have setup postfix and postfixadmin on a CentOS 5.5 server and the install appears to be ready to go. I have never used postfix and postfixadmin and I am having a hard time finding any documentation on how to setup and administer the postfix server with Postfixadmin. This is simply a test and alerting server and will not be hosting user mailboxes. I am only looking for the basics I am not going to need to setup anything complex
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Jan 28, 2011
I just installed Webmin on this CentOS 5.5 client and would like to know if it's possible to remotely administer the Squid server. The one I'm using for webmin is different from the one where Squid proxy is running.
How do you set it up and where in Webmin?
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Jul 9, 2010
I'm pretty new here and I want to be able to set up my Linux box as a shared drive (so that I can use it as a backup drive to my win7 machine). I'm using webmin to administer Samba and I get to the point where it shows:
Share Name Path Security
homes All Home DirectoriesRead/write to everyone
When I go to my win7 machine it I can browse to the machine (called jira2) and see the folder called homes, but when I click on the folder it says Windows cannot access \JIRA2homes. if I expand the details it says Error code 0x80070035 I am running Ubuntu 10.04.
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Aug 7, 2010
I am trying to setup the most efficient way to remotely administer an ubuntu system. So far I was successful in setting up ssh. I have the server running and made sure it only uses keys to authenticate and changed the default port. I can connect to the ssh-server. This system is behind nat and bots trying to break-in when I forwarded the port. I used the AllowUsers option, which helped in knocking back these rouge connections. I was not comfortable leaving a port open all the time, so I set up logmein Hamachi VPN and closed the ports that were open on NAT.
Now I use Hamachi and am very impressed. I use VNC in VPN. But Vino is slow, I tested x11vnc and it was slightly faster. I also tried to set up freenx but nxsetup file was missing. some one posted that file in the forums and suggested copying to the system but I was not sure if I want to download a script from the forum and use it. So for the time being, I thought I will just concentrate on X11vnc until freenx is fixed.
I would like to create a separate desktop on the server and use it to access remotely. This way we will not have to fight over the cursor (sounds funny but very frustrating). From what I understand x11vnc has this function inbuilt (uses vncserver). I cannot get it to work! when using ssh, at the remote machine's command prompt, if I type "evince xyz.pdf", it does not launch the "xyz.pdf". what am I doing wrong? When using VNC, how can I change between different users on the remote machines? Right now I can only use VNC in one account that I first setup. When I try to change to another user, vnc client goes blank. How can I get as much control of the remote system as possible? Right now I need someone to switch on the remote system and login to their account before I can VNC. Can I use ekiga inside VPN, I use skype right now and it's sometimes terrible with dropouts. I looked around and someone suggested using ekiga as it works very well over lan. How do set up ekiga so that I have a direct connection with the remote system? Is there any client that just takes the IP address and creates a connection? Mumble seems to be the popular choice, it's most suited to LANparties, I just need a connection between two systems. I am trying to set this up to help users with hardly any computer knowledge to use the system without any issues.
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Jul 24, 2010
I would like to experiment a "green" idea of virtual desktop where multiple users are served by a single powerful machine.
I have a server running 24/7. The monitor of this machine is turned off most of the time and the OS is on the login screen.
Other users, in the same local network, use less powerful machines, which could be a thin client or an old Pentium 3 machine. They access their accounts remotely and work with the GUI as if they were sitting in front of the server. Each user sees their own desktop (different themes, screen resolution, etc.). And of course it can happen that several users could log in at the same time.
The usage is modest: mostly web browsing and the usual default applications (office, wine, gimp, etc.). In particular no games or any demanding applications. The users want to use their desktop in graphical mode only.
Question: How do we call this way of using a server? Is it possible with Ubuntu? And how to implement it?
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Jul 6, 2011
I hope someone can help me as I am new to Linux and Ubuntu. I am running Ubuntu 11.04 and am trying to get VPN working properly with the pptp protocol. It is connecting but I cant seem to view folders or start a RDP session. I have tried this out with a Windows and a Linux machine and both work. The Linux machine was running Mint 10, in the vpn configuration I had set the gateway, user and pass, then in advanced mschap and mschapv2 were selected as well as mppe, allow bsd, allow deflate, and use tcp header. These settings work fine with Mint but its not working for me using Ubuntu. I did try to ping, sometimes it works sometimes it wont.
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Jul 8, 2011
I have just installed Ubuntu 11.04 and the Cisco VPN client with :
apt-get install network-manager-vpnc
I have imported the PCF provided by my employer into the GUI. The group password also seems ok, when I login to the VPN server, I am provided with the "VPN Login message". (On Windoze, I get an Ok/Cancel popup with the same message). In Ubuntu, I don't get to click "Ok" but it looks like I'm connected properly. The /var/log/syslog file contains numerous static routes added, 30 or so. After the Login Message, I see the couple of line:
Jul 8 12:40:51 ubuntu02 vpnc[1613]: can't open pidfile /var/run/vpnc/pid for writing
Jul 8 12:40:52 ubuntu02 NetworkManager[630]: <info> VPN connection 'VPN to my network' (IP Config Get) complete.
I get an IP from the external network correctly as well:
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:172.16.10.170 P-t-P:172.16.10.170 Mask:255.255.255.0
However, I cannot ping any of the machine on the remote network. None of the network services seems to be accessible. Why the machines on the VPN are not accessible?
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Nov 4, 2010
I am trying to have a serial device connect to my ubuntu machine via the com port, and forward that comport over the network to a windows box so that I can configure/access the device. I have looked into socat/ sredird but still haven't found an option that I can get to work.
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Oct 29, 2010
I have an OpenSuSe Server configured with DNS, Samba (PDC + WINS), LDAP, Squid All this is in a hybrid scenario with other OpenSuse acting as clients and some Windows 7 also as clients. Everything works perfect. Both systems are able to join and authenticate in the Samba server very smoothly.
My problem is that in my workspace I have several different subnets/VLANS. So I have another OpenSuSe client here that needs to join the domain and authenticate with the samba server, but he just cant find it via the Windows Domain Membership setup screen (where I usually configure the others).
The server can pe pinged, and it does resolv local domain names. It seems the problem is that I have no place to configure a PDC/WINS server in Linux Client. It only asks me for the domain to join, and then it doesnt find it (Im guessing this happens because it cant receive the broadcasts from the server network).
Is there any way to declare the Samba/PDC/WINS server on the client side?
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May 31, 2011
I have a server machine that is running SUSE Linux Enterprise Server 11. I set up a mysql server there. Now I want to access this mysql server from my laptop. I used the following command,
> mysql -h 12.246.5.70 -u davidehs -p
I found if the firewall on the server machine is running, I can not connect the mysql server from my laptop. If I stop the firewall first, and the do the connection, I can access the mysql. how to keep the firewall running and allow the remote mysql incoming requests?
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Jan 28, 2011
I have a server machine that is running SUSE Linux Enterprise Server 11. I set up a mysql server there. Now I want to access this mysql server from my laptop. I used the following command,
> mysql -h 12.246.5.70 -u davidehs -p
I found if the firewall on the server machine is running, I can not connect the mysql server from my laptop. If I stop the firewall first, and the do the connection, I can access the mysql. Do you guys have any idea how to keep the firewall running and allow the remote mysql incoming requests?
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Jul 25, 2011
I have logged into one Linux VM and I want to test remote access to another Linux server on the same network but I cannot recall the Linux application to call?
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May 21, 2010
Some FreeNX start-up troubles here, need a hand. 1) I am trying to establish a connection from my workplace PC on my workplaces's LAN to my home PC on my private LAN (LAN-to-LAN). Just typing in the public IP of the target LAN in the "Host" field gets me nowhere, as it fails to connect due to a denial at port 22 SSH - even though I've done the forwarding in my home router and punched the required hole in the local firewall of the target machine.
This resembles what I'm looking at: [URL]..2) My home PC is 64-bit Mepis and my workmachine is a 32-bit Ubuntu. Is this a problem?
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Feb 12, 2011
I have a virtual Linux box with a static IP in the cloud.
I have remote sites that have networked PCs that normally act as terminals but also have more than one printer on the Windows Network.
I would like software on the Window's machine to access the known IP address of the server and advertise the printers on the network so they can be printed to with lpr or cups. I don't have a problem manually setting up the printers on Centos if that is necessary. (But I need to know how to do that as well).
I need to know if I can setup a VPN on Windows without it stopping regular internet traffic and how to do it.
I need to know all the steps (what to install, what to issue commands for) to make this happen without using a GUI if possible and if the GUI is easier I need to know which GUI to install.
I also do not have a problem with using a VPN router at the client side if that makes it any easier. Like a Cisco RV120W.
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Feb 28, 2010
I've got problems uploading files to a remote FTP server using passive mode with enabled SuSeFirewall2 (Using 11.2)
I've disabled Firewall and everything went ok. Why firewall disables or terminates OUTGOING connections to a remote FTP?
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Jan 27, 2010
Is there any one know how to deploy a remote OS installation for a host with public network address? In a LAN with private network, we can use PXE, kickstart... but what we could do with the hosts have only public ip address?
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Sep 7, 2010
I have installed Ubuntu Server (lamp+openssh) on a laptop in order to use it as a testing web server for my projects. After configuring it I've also installed the GUI to make things easier as I'm not very proficient using just the command line.
I'm using the wireless connection on the laptop to communicate with the router and my main desktop (Windows). I've assigned it a static local IP (192.168.1.99) in order to be able to access the sites on my web server from my desktop, and everything works fine.
Now comes my problem: I need to be able to access those local sites from a remote location (outside of my local network) as well. How can I do that?
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Mar 29, 2011
We have installed Ubuntu Server 10.04 LTS for file share (Samba) at our local network.
I want to access my local server (Local IP 192.168.1.200) via internet from remote location. I have already installed SSH on our ubuntu server. I understands that using "Putty" we can access our server. Furhter, our Internet IP is dynamic (which is not an issue for us).
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Jul 9, 2011
I want to get all the directories from a remote server using ftp. I know how to use mget for files, I would like to know if there is a similar way to get the whole directory with the files included obviously.
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Jun 16, 2010
I'd like to administrate my parents' computer over the Internet. When I google for a tutorial on what I have to install and configure on my and their PC, I always end up with tutorials on servers and the like or tutorials for a connection between Ubuntu and Windows.
Does anyone know of an easy tutorial for remote desktop when two private, simple (Ubuntu-installed) PCs are involved?
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Dec 8, 2010
I've been trying to set up guake to automatically open 2 programs in two different tabs via ssh on my remote server. I have succeeded in doing this, however whenever the last command is run the terminal tab locks up and I can't enter any input, the only command that works is ctrl+c to kill (in this case) iptraf. I think it might be something to do with how I'm sending my ssh password using echo and pipe. This is my script:
Code:
#! /bin/bash
# script to launch multiple guake windows on Network21 local server
guake --rename-tab=Htop21 --execute-command="ssh -t 192.168.1.137 'htop'" &
sleep 5 &&
guake --new-tab=2 --rename-tab=Iptraf21 --execute-command="ssh -t 192.168.1.137 'echo password | sudo -S iptraf'" &
The first and second commands always work, whilst the last one loads iptraf then the cpu maxes out and i can't enter anything unless I kill the program. I've also tried nload and a couple of others, with the same results.
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May 2, 2011
how to configure remote server....and how many maximum user loging remotely
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Apr 30, 2010
I cannot access a remote server(Ubuntu) using ssh or even using sftp from my ftp client. I've been accessing this server regularly for many months with no problem until now. There is a web server running and that's OK, so no problems there. I asked the owner of the server if he could access using ssh from within his LAN, which he could! So openssl is working from within the LAN, but not ouside of the LAN. I access the remote server by using one of [URL] free domain names. I'm aware that this service requires renewal or activity at least once a month and as far as I know this is up to date and working OK.
Is this a router gateway problem? I suspect that port 22 has been blocked, but what could block this port? It's been working well for so many months. As far as I can tell the owner of the server/LAN has not been tampering with the router, so what could be blocking port22? I'm currently accessing the server using vnc4server.
Another really weird thing is that when I access the terminal on the remote server via vnc4server and I ssh back to the server using one of [URL] free domain names, it works! So as I understand ssh is accessing itself by going out of the LAN and back to itself. This would suggest that port22 on the gateway router is working. But when I try to ssh from a pc outside of the LAN, I just get timed out!
* openssl working from within the LAN but not outside of the LAN.
* sftp not working.
* domain name from dyndns.com working and up to date.
* Web server is working OK.
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Jul 27, 2009
I install one server in my system(linux 5.0) and accessing that server through the 127.0.0.1 private ip address(lo). While i connect to a remote server for validating registry it gives me the error and unable to connect to remote server. here some of the files i give here in below to know my system network configuration
/etc/hosts
------------
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
127.0.0.1 cp.softidsolutions.org
[code]....
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Mar 22, 2010
I'd love a hint or two on the following problem. I've set up iptables rules to forward all connections to port 3306 to a non-standard mysql port on a remote server. This works, except that I need to deal with the loopback interface in a special way and I'm stuck.
Code:
iptables -t nat -A PREROUTING -p tcp --dport 3306 -j DNAT --to 128.XXX.XXX.XXX:3197
iptables -A FORWARD -p tcp -d 128.XXX.XXX.XXX --dport 3197 -j ACCEPT
iptables -t nat -A POSTROUTING -j MASQUERADE
Since locally-generated packets will never hit the PREROUTING rule, you'll need to setup a near identical rule using OUTPUT to make it work. Here is what I've tried:
[Code]...
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