Ubuntu Networking :: Disrupts Internet Connections To Other Computers

Sep 18, 2010

While using Ubuntu two other computers lose their connection. One (main) is connected to the modem, other from the switch to the wireless router, and the one with ubuntu wired via switch. Currently connected with Windows 7, other two are connected. Once booted into Ubuntu rest of the computers disconnect?

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Ubuntu Networking :: 10.10 Lab Computers Dropping WiFi Connections

Jan 5, 2011

Our school has a small 3-computer lab in the preschool department where the kids come in and simply use Firefox to access some educational websites. Due to logistics in the building they're in we had to go with a wireless solution in the following setup:

- Apple Airport Extreme WAP
- 3 HP DX2200 desktops running Ubuntu 10.10
- 3 Trendnet TEW-664UB USB wifi chips

All was running great until we got the computers installed on site and now they are constantly dropping the wifi connection if they are even able to connect at all (which is highly hit or miss).

10.10 picked up the USB wifi card as soon as we plugged them in and showed the available networks, but actually obtaining and keeping connections is a nightmare at the point. The computers are in very close proximity to each other (only about 2-3 feet between computers) and the WAP is in the next room (other computers and mobile devices are able to connect to the WAP with full signal from the same room/location). Thats about all the detail I have off the top of my head, could this be an interference issue with the wifi cards or does this sound like an Ubunutu issue? Again we have had multiple other devices in that room all able to connect seamlessly.

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Ubuntu Networking :: Remote Desktop Connections - Access Files On The Other Computers In My House

May 22, 2010

Alright so i just wanted to try and get remote desktop connections running so i can access files on the other computers in my house. For my first try i went after my laptop. I'm using rdesktop.

First couple times i tried i typed in


After about 15 seconds it would pop back with


I realized that my laptop's firewall was blocking the packets, so i created a custom rule that allows all TCP packets on port 3389. So i fired up rdesktop again. Now it pops back with:


But instantaneously, not after 15 seconds (not sure if thats significant or not.) I checked my firewall's log and it allowed the tcp packets.

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Ubuntu Networking :: Making Internet Between 2 Computers?

Sep 4, 2010

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.

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Ubuntu Networking :: Share An Internet Connection Between 2 Computers

May 30, 2010

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

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Ubuntu Networking :: CAN Connect To Other Computers But Not Router Or Internet - 10.04

Jan 3, 2011

- 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
- 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



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:


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).

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Ubuntu Networking :: Internet Got Extremely Slow On Both Computers?

Mar 10, 2011

I have an old HP pavilion laptop (2005) that was useless.I installed Ubuntu 10.10 on it and it became a working computer again. It was excellent, snappy, it was as if I had bought a lower end modern laptop.Internet was working great.I did not have any complaints (in fact, I thought that a modern computer running Ubuntu would beat my so adored macbook, speed wise). For some time I had 2 efficient computer, a macbook and the hp with the Ubuntu OS. So on the last weekend of February, my internet got extremely slow on both computers. After that annoying weekend (February 28) the internet on my mac was good again,however, the internet on my linux continued to be messed up.I tried disabling IPv6 on my machine and on firefox, tried the openDNS, the MTU stuff, but nothing.I even formatted my disk and installed ubuntu again (all this using the installation CD).However, apparently the installation CD uses some of your existing configurations (for example, the layout of the close, minimize,maximize:menu buttons on the corner of windows did not go back to default). So I'm guessing whatever was messed up with the computer didn't change back to default or the previous configuration when I first installed ubuntu. To give you an idea of how slow the internet is, installing alien (terminal installation),I got low speeds of around 150B/s (no typo here, it was bites, not kilo bites) and the fastest around 5,000B/s. The fastest I got was downloading chrome at 6kB/s but that didn't last even a minute. So given that these transfer rates are obtained both on firefox and the terminal, I'm assuming it is not a browsing problem.

A thick headed solution, would probably be to install windows again to get the network configuration to "standard" and then install Ubuntu formatting the disk again (using the CD).I'm using ethernet,so,thinking it might be cable problems, I did try to use the cable that was on my mac on the machine with linux. No success there.

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Ubuntu Networking :: Giving Internet To Other Computers Without Router?

May 5, 2011

If I have a desktop with a USB wifi adapter connected to the internet through an ethernet cable, is it possible to create a wireless network using the adapter that will allow other users to connect to the internet through mine? I'm in a fairly low-tech place for the next few weeks and getting a router isn't likely.

If it's possible, anyone have links or instructions for how to do it?

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Ubuntu Networking :: Using Laptop With Wireless To As Internet Source For Other Computers?

Jan 2, 2011

I have an old laptop with wireless, 2 desktop computers without wireless and an Allied Telesyn gigabit ethernet switch (specifically AT-GS908GB). Is it possible to hook the 3 computers into the switch and use the laptop's wireless as the internet source for the other 2?

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Ubuntu Networking :: Internet Connection Is Not Working On Any Of The Windows Computers?

Apr 13, 2011

I have internet on my ubuntu machine (eth0) I am sharing with (eth1) My windows computers are getting IP addresses via DHCP from the Ubuntu Machine, and I can see (and use) samba/windows shares on all computers. Internet connection is not working on any of the windows computers.

I have eth1 set to "shared to other computers" under the IPv4 settings

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Ubuntu Networking :: Internet Connections Is Not Working

Apr 7, 2010

I have the latest Ubuntu (9.10) desktop. My 2 cards are:

WiFi: Intel(R) Wireless WiFi Link 5100
Ethernet: Marvell Yukon 88E8072 PCI-E Gigabit Ethernet Controller

Is there any way to get drivers working? My hardware switch is on and i have Ubuntu 9.10 running persistently on my usb so i can download the drivers etc. and install them.

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Ubuntu Networking :: Monitor Internet Connections ?

Jun 7, 2010

I am a user of Ubuntu 10.04 and I use Firestarter because it lets me know which IPs I am connected to, which ports are used, and which applications are using those ports. The problem is that I can't use Firestarter with my non-sudo account (well, I know that I can change my system settings to do that, but I'd rahther not do it).

So the question is: Is there any application that lets the user monitor the internet connection?

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Fedora Installation :: Network Connections Is Inactive - Cannot Set Internet Connections

May 30, 2011

I recently installed Fedora 15 now, and during installation I set the internet connection manually, then did update and after reboot, the internet connection settings have been removed. Now I can not set because the network connection to the Internet Connection is inactive. I mention that before the update was functional internet connection.

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Fedora Networking :: Cannot Connect To Local Computers But Can To Internet?

Sep 28, 2009

I am using Fedora 11 all upgrades, wireless network WUSB54G network adapter. I can get to the internet but cannot get to any Windows ( or Fedora 11 (...104) computers, printer (....101, 105). Here are the tests I have run.

[root@Fedora2 sbin]# ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=1.76 ms
64 bytes from icmp_seq=2 ttl=64 time=268 ms
64 bytes from icmp_seq=3 ttl=64 time=1.63 ms
--- ping statistics ---

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Fedora Networking :: Share Internet Connection With Other Computers On LAN ?

May 28, 2010

Trying to share my internet connection with other computers on my LAN. I've tried doing this with Debian, Ubuntu & Fedora so far...

My Intended Setup is as follows;

The Problem: So far I've not been able to get an internet connection from any computer connected to the HUB. I currenty have Fedora 13 on PC1 but have also tried with both Ubuntu 10.04 & Debian Lenny. I am open to using any Linux based distro on PC1 as long it has a Gnome Desktop. eth0 on PC1 can be Static or Dhcp, but I would prefer to set Static IPs on eth1 & all of the Client PCs

To the best of my knowledge I have enabled ipv4 forwarding in sysctl.conf (& some other changes);


All changes I made to the Firewall (all other Firewall settings are still at default, no custom rules added yet);

Router is set up to assign dhcp from 192.168.xxx.100 & 192.168.xxx.200

At the moment I have only 1 PC attached to the HUB. It's Ubuntu 10.04 (PC2)
It's details are;
ip 192.168.xxx.103
gateway 192.168.xxx.101

Thus Far I can't ping 192.168.XXX.103 from PC1 & I can't ping 192.168.XXX.101 from PC2. (unreachable) I have an internet connection on PC1 (of course)

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Networking :: 2 Internet Connections With Shorewall?

Mar 24, 2011

I've got a Ubuntu Server Linux router that I've got 2 internet connections hooked to. One of them is DSL and the other is cable.

What I'd like to do is have everything go through the DSL connection EXCEPT for one desktop, I'd like that system to go through cable for everything.

Here's a diagram of how I've got things set up.


I don't have any more expansion slots on the mainboard of my server for another NIC, also I do a lot of file transferring between a laptop and the desktop I want on the cable connection so I don't want that slowing down the rest of my network.

I've got both providers set up in the providers file and I've got everything going through the DSL connection right now. So far everything I've tried has stopped the desktop from connecting out at all.

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Ubuntu Networking :: New Install Of 9.10 & No Hardwired Internet Connections

Oct 29, 2010

I Installed Ubuntu which was on the laptop before and this install doesn't want to work with a Internet connection. I know my connections is good and the Laptop is fine because it used to have dual boot and windows connected fine.

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Ubuntu Networking :: Bridging Internet Connections And OpenVPN?

Jul 13, 2011

I'm trying to set up an openVPN server for a small office. I've gotten the server running, and configured keys, and been able to connect to the server. The trouble is that once I connect with my windows machine to the server, I am unable to bridge through to the www. I have combed through so many settings and tutorials, and I am confused as to how to set up the interfaces configuration file. Here's a sample of my routing table:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface * UH 0 0 0 tun0
XXX.XXX.XXX.0 * U 0 0 0 eth0 UG 0 0 0 tun0
default XXX.XXX.XXX.1 UG 100 0 0 eth0

How should I be configuring this so that when I'm in the VPN I can get through to the internet?

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Ubuntu Servers :: Differentiate Between Connections From Windows And Computers

May 21, 2010

I have a question about connections with an ubuntu server. Is there a way to know if the terminal computer (which is connected to my linux server) is using WinSCP to connect (on a Windows platform) or a linux system? It seems they are using the same port (22) and I think the exact same protocol (SSH / SFTP), is there a way to differentiate between the two though? And going farther there, is it possible to limit the connections only to linux terminal computers and reject requests coming from Windows computers?

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Fedora Networking :: Two Internet Connections On F10 Server?

Feb 25, 2009

I have a question, regarding the use of two internet connection on the same server. So, the thing is like this: The server will have 3 network adapters: connected to a DSL modem (on this adapter I have one of the internet connections, a PPPoE connection. It's only purpose is to share the internet connection to all LAN users using SNAT.

eth1 ----> the other internet connection, a much more expensive one actually, used for hosting a website, a domain name server, and a qmail server. eth2 ----> LAN connection So what I want is to make eth1 the "default gateway" (for outgoing mail, DNS requests, etc) and, as I said, use the ppp0 connection on eth0 only for internet sharing in LAN.

My question is (since I'l configure this server in about one week), does anybody have any suggestions regarding how could I accomplish this? I mean, I'm affraid that ppp0 will also try to use the default gateway from the other internet connection and vice-versa. Now, I know I can use the ip route/ip rule commands, but for many reasons I'd like to keep it simple and not use them.

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Fedora Networking :: Use Two Internet Connections At The Same Time?

Jun 22, 2009

I have two internet connections. One is wired ADSL Broadband & another is USB EVDO modem. I can use only one source at a time. That means the traffic will pass through either ADSL or EVDO. Other connection just sits idle. I want to use both the connections together so that I will have increased bandwidth. Is there a way to do that?

My computer has one NIC card. Both ADSL & EVDO use dynamic IPs.

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Networking :: Balance The Internet Requests From LAN Using 2 Connections?

Feb 17, 2010

I have a firewall ( a pc with debian 5) with 2 internet connections. each connected to a ethernet card (the firewall has 2 ethernet pci cards so it has one connection per card)how can i balance the internet requests from my LAN using this 2 connections?

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Networking :: Squid Server With Two Internet Connections?

Feb 3, 2010

I have to configure squid server which will have two internet connections on two separate lan cards and both will run simultaneously.I know how to configure squid server with one internet connection

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Ubuntu Networking :: Manage Multiple Internet Connections With Different Cards?

May 25, 2010

I'm running ubuntu lucid and i was thinking in purchasing one or more extra wifi cards to try to configure my computer to manage different conections at the same time, with different isp's. The thing is that I'm not quite sure if what i want to do is actually possible.

The easiest way that crossed my mind was to try to configure a / multiple virtual machines that are redirected threw proxies to ubuntu and try to configure that each proxie port goes threw a different internet gateaway. This way i might be able to divide threw different sessions of JDownloader, installed on each virtual machine, the things i want to download. The negative aspect of this idea is having multiple jdownloader sessions will make my laptop work to almost 100% for sure...

Another thought i have was to make JDownloader manage its downloads in only one session redirecting them to my internet conections; the negative thing is that i think i will have to try to modify its source and learn java...

And well my last possible configuration i had in mind was to try to make ubuntu directly add up all my internet conections manage as if it was one. the negative thing here is that i might not be able to get multiple downloads from some sites

Well, all this where just thoughts, im struggling whether to buy another card or not to try to setup any of this configurations but im not really sure if any of them are actually possible. Is there an easy way to manage this?

I just want to take the most out of my internet conections... if i'm at college i have to options that are quite slow, adding them up with two cards would be great, i might also be able to add a third and a fourth conection. Also if i'm on a coffe and i need some bandwith i could try to make it go with an open network arround, etc.

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Ubuntu Networking :: Computers Connect To The Internet Fine And Can Ping Each Other Cannot Find Settings To Correct?

Aug 8, 2010

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.

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Networking :: Binding 2 Internet Connections On Same Fedora Server

Apr 11, 2009

Can I bind 2 interent connections or more on same fedora server to create bigger one with double bandwidth ,or it needs a specific router to be able to do this.

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Networking :: Blacklist IPV6 To Speed Up Internet Connections

Sep 18, 2009

I have seen several threads lately about slow internet connections here and elsewhere, but I haven't seen anyone post a reply about blacklisting ipv6 so I am curious as to why?Is ipv6 enabled only on certain distro's or is there some other reason that it's not mentioned?

<If anyone wants to try it, to see if it would work for them>

On Slackware 12.2 and Salix 13.0 just add "blacklist ipv6" to the /etc/modprobe.d/blacklist file. I'm not sure about non-slackware based distro's. Unfortunately, I don't know any way of doing it without rebooting.

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Ubuntu Networking :: Load Balance Or Aggregate(combine) Internet Connections

May 12, 2010

My problem is that I would like to load balance or aggregate 2 separate Internet connections on my laptop. Currently a hard line ISP is not available so I'm using an Sierra Wireless 885 USB air card. Thing is the card is quite slow. I also can tether an iPhone to the laptop. The ideal solution would be to have both connections being utilized to help speed up the overall experience, even if it is only a modest gain in speed.

as I do not know much about iptables and basic TCP/IP routing, I'm finding it difficult to implement those solutions. If someone can point me in the right direction ( a slightly dumb down how:to? or better explained? )

BTW, both phone and aircard get dynamic IP's. Running Ubuntu 10.4

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Networking :: How To Allocate Percentages Of Internet Bandwidth For Different Local Connections?

May 18, 2010

My linux box has 3 network adapter. eth0 connects with ISP, eth1 is for staff network, eth2 is for public user. I want to limit the usage of internet bandwidth. for example, the traffic going through eth0, 75% is for staff network, 25% is for public user.In addition, I setup shorewall on it for port forwarding and filtering, but I felt the traffic shaping of shorewall is complex. I don't need the specific TOS, but only the percentage. could you give me some suggestion?Which software or package I should use to achieve this goal?

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Ubuntu :: 2 Pptp Vpn Connections - When I Dial One Of My Vpn Connections, My Other Vpn Connections Be Disabled?

Feb 7, 2011

have a problem with my network-manager in ubuntu 10.10.when I dial one of my vpn connections, my other vpn connections be disabled and I can't use them!I tried to restart network-manager and gnome-panel, but it does't seem to solve this problem.

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