Ubuntu Servers :: 10.04 Won't Allow Client Computers To Connect To The Internet
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?
I did a search and came up with many different opinions and suggestions, and I could not find any similar threads for this (if there is I must apoligize in advance and did not look hard enough). I am trying to create a backup schedule for client computers and servers; and I would like your opinion on what I came up with. Here is network infrastrusture setup:
16 client computers 6 serevrs - Primary and Secondary Web Server (RAID 1) - Primary and Secondary Domain Controller (RAID 1) - File/Print Server (RAID 5) - Backup Server (RAID 1) with USB 2.0 1TB External Drive
Of course I will evetually upgrade to Tape Drives, but I am saving up for that. Anyways I want to backup ALL client computers, Primary Web and DC server, and File/Print Server. This will be done (of course) on the Backup Server) Here is the schedule:
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?
- CAN connect to other computers - ssh and vnc over the home network (via D-link 524 router). - CAN get an IP address via DHCP - CANNOT get internet connections - including router at 192.168.0.1 - CANNOT even ping router (but I get an IP address - weird) - Other computers on the network CAN access internet - Live CD could not access internet
results of ifconfig
Code:
Code:
I am wondering if his ISP could be doing this - he has received a warning letter about bitorrent. Could the isolate a single computer behind a NAT router?
This is the results from dmesg:
Code:
I have tried:
- to set proxy settings as "Direct internet connection" - disconnecting power to (including 30 sec wait): modem, router, computer + unplugging ethernet from computer - Live CD (he only had an old one 7.10) which also didn't connect to internet, but as I am remote, I couldn't do any more. We are downloading a 10.04.1 iso for him to burn tomorrow, and will try that again. - Uninstalled Crashplan which was the last software that we installed (and it was working ok).
I am currently ssh'ing into another computer on the network that IS working, and then ssh'ing into my Dad's computer - including a VNC session (tunneled through both machines and router).
I am using Fedora 11 all upgrades, wireless network WUSB54G network adapter. I can get to the internet but cannot get to any Windows (192.168.1.100) or Fedora 11 (...104) computers, printer (....101, 105). Here are the tests I have run.
[root@Fedora2 sbin]# ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1.76 ms 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=268 ms 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.63 ms ^C --- 192.168.1.1 ping statistics ---
I set up a server that has dhcp going. This works 100% as I get ipaddresses. My question is how do these internal computers connect to the internet? There is a proxy that needs to be passed as well...
Is this just a simple case of portforwarding or is this a completely different thing?
I have 2 10.04 computers and one win 7 and one vista computer: The win computers can see each other and the ubuntu computers, but the ubuntu computers cannot see each other or the win machines. The ubuntu computers connect to the internet fine and can ping each other. I cannot find settings to correct.
This may sound stupid but I've got to ask. Can I connect multiple computers running Ubuntu & run software from one computer from the other? I know how to connect using SSH & to copy files back & forth but I don't know how or if I can share programs.
Ever need to provide access to multiple PC's and did not have a router only a hub. Maybe this isn't original thinking, but then again maybe you didn't think of doing it this way (which i am sure there are many ways to do it) So I have 2 Ubuntu Servers, 1 Windows Box and a Hub - All 3 with internet access off of single ip and single Ethernet port.
While searching for a backup method today I came across Clonezilla. I was wondering if this was the right thing for me and since I needed to backup my roommates PC for a reformat and install of Windows I decided I would give it a try, but only if it would work. I didn't want the hassle of going into the main part of the house and finding out what cord was what as there is a cable modem connected into a switch (4 static IP's with internet) and one port of the switch hooked to a router) Anyways, didn't work he was on the router I was on the switch)
But this got me thinking. When I setup my server to do this, during one of the setup scripts it said it was setting up Internet access for client machines and that it was assigning them IP addresses threw a DHCP server that it had installed.
So, I dug up the hub connected the internet cable to hub up link and Server 1 on port 1 Server 2 on port 2 and Windows on port 3 The main server gets the internet provided IP address and routes it to the hub via a virtual interface. Server 2 is configured for DHCP and the windows box, It was set to get info automatically but it didn't fill the DNS info so I had to manually do that (just a heads up) I decided to use OpenDNS Servers (208.67.222.222 & 208.67.220.220) but im sure putting in the gateway IP address would have worked too.
So, by now if you need this I am sure you are excited and want to get to it. Like i said there are probably other ways of doing it, ways that don't involve you installing clonezilla and DRBL, maybe even just DRBL is needed, maybe one of them installed whats needed as a dependency- all I know is it works, if you know - elaborate so people know, but hey- this way not only do you have internet access on all PC's you can deploy custom images to them as well.
I just recently constructed a computer to create a nice Fedora Linux server to replace a Mac Mini server that I have been using for a few years. I'm attempting to create a Samba share for my machines, a Windoze 7 machine as well as a couple MacOS 10.6 machines. I've set up Samba, started the service, allowed Samba in the firewall, and used system-config-samba to set up a share with a user. I created a User called "space", and a share /media/peliculas/Movies (a mounted hard drive). When I type in \IP_ADDRESS in the address bar in windows 7, I get the option to log in. I log in correctly and I see two directories "space" and "Movies." Unfortunately when I click on one of them I get the following error message:
Windows cannot access \IP_ADDRESSMovies Check the spelling of the name. Otherwize, there might be a problem with your network. To try and identify and resolve network problems, click Diagnose. I also get something similar when I attempt to connect with my mac machine. Using "Connect to Server" I type in: smb:\IP_ADDRESS, and login, I have the option to mount "Movies" or "space." If I select any of these, I get the following error message: There was an error connecting to the server "IP_ADDRESS." Check the server name or IP addres, and then try again. If you are unable to resolve the problem contact your system administrator.
Also, if I type 'smbclient -U space -L IP_ADDRESS' I can see the "Movies" in the "Sharename." At this point I'm not sure what else to do, and have been trying to figure this out for the last few days (losing sleep due to being baffled). The only thing that I can think of is that I have something wrong with the smb.conf file. Here is what it currently displays:
Global Settings
workgroup = WORKGROUP server string = Samba Server Version %v log file = /var/log/samba/log.%m max log size = 50
[code].....
One last thing, when I check the log files, there are error messages that state: smbd/service.c:1009(make_connection_snum) '/home/space' does not exist or permission denied when connecting to [peliculas] Error was Permission denied --Windoze 7 and MacOS 10.6 log files
I have Cisco Switch 2960, and it has been configured with dhcp (from 192.168.43.31 to 192.168.43.) and all my client connected to It. I have a modem and Its IP is 192.168.1.1, I used Fedora Linux system in between Modem and Switch , and made IP forwarding (Only one ethernet port is avaliable in Fedora Linux System), so that I can use the Internet through out the LAN. But When I try to ping modem form client system, I get an message icmp_sep=1109 Redirect Host: (New nexthop: 192.168.1.1), I am not able to connect Internet from my Client system.
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..
I am back to the same issue internet connection sharing using NAT .I use the following command it work for me for an hours.
Code: sudo iptables -A FORWARD -o eth0 -i eth1 -s 192.168.0.0/24 -m conntrack --ctstate NEW -j ACCEPT sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT sudo iptables -A POSTROUTING -t nat -j MASQUERADE
Code: sudo iptables-save | sudo tee /etc/iptables.sav Edit /etc/rc.local and add the following lines before the "exit 0" line:
Code: iptables-restore < /etc/iptables.sav
Code: sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
After restarting my server NAT is not working .client system can ping to my server through the server's eth1 ip but Internet is not accessible to the client pcs.
I'm trying to run Web server (nginx, does not really matter) "behind" VPN tunnel (i.e., on VPN client - the idea is that Web server is available at VPN endpoint IP on VPN server). Stock Ubuntu 9.10 Server with stock openvpn 2.1. No network changes done, only ufw is enabled and IPv6 is switched off. I need this box to be available at main IP address, no default route for VPN tunnel.
Tunnel itself works nicely, no problems at all. Hand-made static routes work via tunnel just fine. Problem is in-going traffic - I can see that it at least comes via tunnel (via OpenVPN debug), but is blocked (or dropped) by firewall or kernel. As far as I know, specific VPN server does not filter anything and is used for running Web servers on other IPs. I think I might need to set up some sort of IP forwarding for tap0 device to localhost - but don't really know where to start.
Tried disabling firewall, making Web server listen on all IPs (from localhost to VPN tunnel) - no luck. The box is in another country and KVM will be time and money, so I really don't feel like experimenting. openvpn.conf (IPs are obscured, non-relevant options removed, based on recommended config for that server):
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.
I would like to know how to install a webmail server and a suitable client to help connect to it that is compatible with both windows and linux ubuntu.
I just recently installed ubuntu 11.04 server on an emachines etower, 400MHz intel celeron, 256MB RAM. I've tried installing apache2 and python3, but cannot get it to connect to the internet. while I understand how to work in a command line, I'm not sure what to do to diagnose the problem. I can list all the packages if it would help. (it's a fresh install so far), as well as the ethernet statuses (two cards for a firewall type setup)
I have a openSSH server, it works to connect to it within the local network but I can't connect to it from the Internet. What I would like to do is to connect to the server using filezilla client, simply by using username and password.To make it secure from brute force attacks will I only allow connections from specific IP number.
I have a server with the static internal ip 192.168.1.5, port is 2222. My global ip is 10.4.5.6 and I would like to connect with filezilla client from ip 11.1.2.3. How do I connect?
1. I can connect to my slack 13 laptop via PuTTY on my GF's windows laptop. Can I actually copy things from my laptop to her machine using 'scp', or is PuTTY just used for browsing my linux filesystem on a windows machine? Google has been telling me about some software called 'WinSCP', which can copy files over, but I was just wandering if i can do this anyway using PuTTY?
2. The first time i did connect to my laptop from my GF's laptop (and also my ubuntu desktop) I get the warning about the host key is not cached in client machine("the server's rsa2 key fingerprint is: ssh-rsa XXXX xx:xx:xx:xx:xx:xx: etc etc). I understand why this happens, but I have no idea where to find this value on my host laptop. I can find the actual key, but not the fingerprint (i.e. the xx:xx:xx:xx:xx:xx:xx" etc). i blindly typed "yes" to get SSH working?
3. When i connect from the internet (rather than over my home network) will i need some kind of 'shell login account' to do this cuz i dont have a static IP. ie i'd like to do 'ssh tom@myAccount.com' rather than 'tom@123.432.32.23'? Where or how can i make this happen?
I'm going to load ubuntu server to a computer just for testing and learning. There is one ethernet card on this computer that will only be used occasionally to connect to the internet. This computer will not have any computers or routers connected to it. So my question is, once installed and running, will DHCP just sit quietly and wait for a request or is it going to complain a lot that it is not finding any other computers?
I have installed lamp server on a computer i have for website development. i use the latest ubuntu server 9.10, apache, php, mySql, Webmin - all the latest versions. it has been running very smoothly for a while now, accessing both from internal network as well as from outside.my problem is very strange - whenever i connect using ftp client to my server from outside, to do a "massive" file operation like uploading a big number of files or deleting an entire directory, my computer/server "crashes" and i lose connection to it for a few minutes. i cannot access it via ftp, not ssh, and neither of the website installed on it run (http). i just have to wait about 10 minutes for the server to come back again.Like i said - it only happen when accessed from the outside (internet). if i do the same operation from a local computer (the same network) no problem there.
I want to be able to access my desktop from work so I first set up a DNS. I can ssh into my own computer and using the ip address but when I try to ssh using my DNS (this is from my home wireless which is Linksys E2000), I get the following error:
debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to ****.com [74.79.145.28] port 50000 debug1: Connection established. debug1: identity file /home/andy/.ssh/id_rsa type -1
[Code].....
I set up the settings on the Linksys to accept DDNS but I am thinking there might be something else I overlooked? I do not understand completely what is happening to debug this. It seems like it initially accepts the connection and then something strange occurs.
i have two computer first one is the main computer, he is connected to the internet throught DSL ubuntu 10.10 beta installed
the second is ubuntu 9.10, and i want this computer to connect to the internet of the first computer
they both connected to a B-FOCUS router 270pr but i dont want to make the router to be the one that connects to the internet i want the first computer will connect to the internet and the second will be accessing the internet of the first computer connection.
I have 2 Ubuntu Computers on my home network. I haven't figured out the ways that I can connect these 2 computers to share files, remote desktop, etc. What are all my options?
I have 2 computers,one is connected directly to internet with a classic rj45 cable. it has a usb wireless dongle too (ralink)the second has a usb wireless dongle but no network card.is it possible to connect the second computer to internet through the first? (second computer connect to the first computer through wireless and through it to internet)infact in first computer share internet with usb dongle.
I have two Ubuntu 11.04 machines connected via cable to the same D link ADSL router. how do i connect one to the other so i can see from the other computer files and transfer them using nautilus?
I had two computers and each had a wireless card, there is no router and no cables or usb sticks etc. Would it be possible to connect the two computers together somehow through the two wireless cards? If so how
i have two machines both on ubuntu 10.4 connected to a network via port switcher, 2 rj45 network cables auto eth0 is setup to share with other computers, i can ssh in and out of both, so the network is all running but i want to know how to share my single dongle internet connection between the 2 computers
