Ubuntu Networking :: Laptop Is "unknown" For Router?
Feb 13, 2010
Any Ubuntu system that connects to my router (Netgear Super Wireless ADSL Router DG834GT) does not acquire a host name on the network. The router reports the IP, and "unknown" as the "device name". As a consequence, the PC can only be reached over the intranet using an ip address, not using a hostname.My mybookworld network drive, that also runs a flavour of linux, does appear to my router with the name "networkspace". This must therefore be a network configuration issue of Ubuntu.I have a hostname set in my Ubuntu system.
Code:
vanadium@vanadium:~$ hostname
vanadium
[code]....
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Nov 6, 2009
I have a desktop PC running Ubuntu 9.10 and Windows 7, and a Eee PC 701 laptop running EasyPeasy Ubuntu 9.04. I'd like to connect the desktop to the laptop with a wired connection (eth0), then the laptop to my ADSL router using wireless (ath0).
I have a crossover ethernet cable (I bought on ebay). I have set up my laptop with a static IP address on my LAN and it uses OpenDNS.
I have added this to /etc/sysctl.conf on the laptop:
net.ipv4.ip_forward=1
Then I tried this on the laptop:
sudo iptables --table nat --append POSTROUTING --out-interface ath0 -j MASQUERADE
sudo iptables --append FORWARD --in-interface eth0 -j ACCEPT
This is a variation on what I found on other sites describing how to set up a router. I don't understand iptables very well, but I gather that the above two lines should set up forwarding so that traffic from my router to the laptop will be forwarded to the desktop, and vice versa.
But this doesn't work. The connection doesn't even establish between the laptop and the desktop.
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Apr 27, 2010
I had previously been having loads of problems getting my wireless printer to work with Linux [http://ubuntuforums.org/showthread.php?t=1453697]. Everything is working fine now. However, something that confused me is that whenever I tried to ping the printer _before_ I got it working, it would fail with a _different_ IP address. That is, the command 'ping x.y.z.3' would fail with a message saying it was unable to contact 'x.y.z.2'
Now I am looking at my router - for something unrelated - and I've noticed that rogue IP address shows up in the list of connected devices. It has a MAC address but for the device name it lists "<unknown>". Should I be concerned about this? how to figure out what this device is?
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Feb 6, 2010
I have a router with 2 IBM Thinkpads connected. One Thinkpad is running Ubuntu, and the other is running XP.
They connect to the router with no problems.
I installed Ubuntu on a Sharp Moebius laptop and plugged in the network cable.
NOTHING.
I have tried pinging the laptop; nothing.
I am not sure where the problem is, because my Thinkpads have no problems connecting to the router, with both Ubuntu and XP
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May 11, 2011
i wanted to know if i can use my laptop as a wifi router; with encryption password and all security so if another computer is in the range can detect the signal and then try to connect to it with the encrypt pass.
also i have one more doubt. can a wireless router be used as a wifi ethernet card and detect wifi signals nearby and connect to internet. suppose i have a wireless router and i connect it to my desktop(with lan cables) which has ubuntu installed, and theres a wifi connections nearby can i connect the desktop to the internet.
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Mar 12, 2010
I've not changed my configuration, but after temporarily unplugging my laptop from the router, I can no longer persuade it to connect again.Have restarted it repeatedly, but to no avail.A similar problem has been occurring with my Huawei 3G Dongle which has suddenly started behaving.Are there any troubleshooting guides for the Network Manager's wired connections? Don't know where to start.
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Jun 18, 2010
\How can i setup my computer (currently running Ubuntu 10.04 lts) into a router so that other laptop can have a wireless connection to it and be able to access the Internet?
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Jan 21, 2011
Running Ubuntu 11.04 on a Gateway LT3103U netbook. It's running fine except for that fact that when it goes to sleep (timeout or lid closed) or going into suspend or otherwise restarted/shutdown, my router restarts. It's a DLink DIR-655 that has been working fine until I changed this netbook to Ubuntu.After installing Ubuntu on the netbook, it found my SSID being broadcast and I added the connection by supplying the WPA2 password. I have full network access (local and internet).
It's just the router restarts and all my other machines lose connections. The router is using DHCP but supplying IPs based on MAC. Netbook is set to use DHCP.
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Aug 1, 2011
I just installed 11.04 on my laptop and the wireless works fine connecting to a AT&T 2Wire router when the ac power adapter is connected. When running on battery power I stay connected to the router but barely any information is transmitted. ie. if i restart the router connection on my computer I can load a web page like google.com then nothing else will work unless I restart the connection again. If I am right next to the router it will continue to work but very slow ( takes about a minute to load ......com when it only takes 2 seconds on ac power ). When I run windows 7 everything works fine when on battery power.Also every thing works fine on a linksys router with ac and battery power.Dell Inspiron 14R Processor: i5-2400MWireless Card: Intel Centrino Wireless-N 1030Ubuntu 11.04 Natty Narwhal
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Jan 6, 2011
My Desktop is wired through eth0 to my wireless router. The router is connected to the internet. the ipaddress leased to my desktop was done with dhcpcd. My laptop is connnected to the wireless router through the wifi card known as device eth1 and i used dhcpcd for that also. How can I network my laptop via wifi through the router to the Desktop?
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Apr 12, 2009
I'm sure that some of us techies have found the need from time to time to have a portable wireless bridge (see ascii art below) on our jaunts into the big bad user-woods, and I am here to ask the question of HOW to pull this off, with the least installation/configuration possible, as my tech lappy is also my main computer. What I want to do is this:
Code:
(ISP) -> (wlan0 - [MyLappy] - eth0) -> (Client computer)
Basically, thats a mess, so i'll explain it further:
wlan0 grabs the netz, and a computer connected to eth0 via switch/router/crossover cable can access those netz.
1. No configuration on the client would be prime choice rib for me.
2. Client should be any OS/Arch.
Any grand ideas out there? Currently using FC10, with various extra repos enabled.
Oh, and N00by alert, I'm learning quick, and am not shy to try new/complicated things, just bear with me!
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Feb 20, 2011
I have two network cards in my computer (Debian). One (eth0) is connected to the router which is connected to the internet, the other one (eth1) is connected to my laptop (Gentoo). Now I want to surf the web both on my computer and on my laptop. I obeyed some tutorials "Linux as router":
1. On my Debian system IP-Forwarding is on:
Code:
takada:/home/sam# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1
2. Laptop has IP 192.168.0.2 and this is the output of 'cat /etc/network/interfaces' on my computer:
Code:
takada:/etc/network# cat interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
But a ping from my laptop to 192.168.1.1 (router to internet) still gives:
Code:
connect: Network is unreachable
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Jan 25, 2010
I have a machine running linux with 3 ethernet interfaces attached.
My Ifconfig:
My route output:
eth0 is attached to a laptop, eth1 is attached to a PC. eth2 is attached to a DSL modem, and the server is successfully acting as my internet gateway. The trouble is, my PC cannot see my laptop and vice versa. E.G. cannot ping, host seems down.
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Oct 15, 2010
Since I have 3 Network cards in my Desktop PC I've configured it to act as a Router using GNU/Linux Ubuntu Lucid in combination with Samba so I could share my internet connection. It works on any laptop a connect to it using any of the network cards ports [regardless of the operating system installed on the Laptops], but when I plug that same network cable to any Desktop PC [regardless of the operating System installed] it doesn't even light the LED in the netcards. From the Client PC seems like nothing is plugged in the the netcards.
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Aug 7, 2010
I'm using a cross-over ethernet cable to connect a Desktop Windows 7 box, and a laptop running on SUSE 11.2. I want Windows to connect to the internet via the laptop's wireless interface.
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May 20, 2011
Environment
Linksys WRT54G Wireless
Laptop wireless Windows/XP
Windows/XP Hyper Terminal
Desktop Server Linux OEL 5 (not wireless) cable connected to the WRT54G router port. (I can go to the Internet with this server, but not able to communicate other computers on the WRT54G Wireless Network. Even though, the Linux Server is connected to the WRT54G router port.) From the Hyper Terminal Wireless laptop Windows/XP, I want to connect to my Linux Server.
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Mar 10, 2010
I installed 11.1 when it first came out. The PC I used gave up the ghost and I bought a refurbie, HP xw4100 and installed the 11.1 drive in it. All works except Internet connection. I am befuddled, bemused, confused and at a complete loss! The router on USB is not detected.
Boot Time - Status blinks, LAN is OFF and remains OFF. DSL blinks several times.
Booted - Status continues and DSL blinks.
YaST (NetworkManager is useless)
Network Devices - DSL
Config Overview
- DSL Devices - Not detected
- Add - PPP over Ethernet
Mode Dependent Settings
- Ethernet Card
- DS: Connection - Unknown - No IP address assigned
- Configure Network Cards = On Hotplug
Network Settings
- Enable IPV6 (as previously set)
- DHCP Client Options - left blank
Overview
- Unknown Device
- IP Address - Not configured
- Unknown Network Device (no hwinfo)
Edit
- Dynamic Address - Zeroconf
Next
- Loop back to Overview - Unknown Device
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Aug 9, 2011
I recently bought a HP laptop which is showing some issues. To make it precise:
1. I can connect to ethernet & wireless when i am at my university, which are quite good connections.
2. At my home, i share the internet with another guy. The connection is not very stable, in the sense that, sometimes the download speed is 1MiB/s, and sometime 250 KiB/s. I have a old laptop which can connect to it without any problem.
3. My new laptop can connect to it when the connection is better with download seed ~1MiB/s, but could not connect to it when the download speed goes down.
4. "could not connect" means even ping to router takes long time with 90% packet loss. But I can always get connection and ip address from dhcp although i can not ping thereafter. This is true for wired & wireless connection both. Is that a router issue? but then, why can i connect through the other laptop.
[Code]....
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Aug 19, 2010
Mine is, ever since I installed the (wrong) opensource video driver for my Ubuntu 9.04 & Lenovo ThinkPad T41 (the one model, imho, they should never have let out the door!), uninstalled it by far-less-than-recommended means (ie, I used Synaptic and sudo apt-get remove and apt-get purge). End up is now my screen has a max resolution of 800 x 600, and Display panel insists that this laptop's screen is an "Unknown" Monitor.
Any tweaks to /etc/X11/xorg.conf (adding vertical refresh and horizontal sync rates for example) has resulted in its own weird behavior. On having my password accepted at login, there's a half-second of white that "rolls" over the screen horizontally. The next thing I see is a diagonal broken streak of white about 2 1/2" down from the top of the screen and 3 inches in from the right-hand side. The next thing I see is a buzzed,jagged rendition of my normal desktop. Nothing at all is clear, and the jags seem to redouble themselves the further one scans down on the screen. The only thing one can do in this situation, and I've done so enough times to know, is a hard reboot (power button for ten seconds or however long it takes).
And as I don't rate sh*t for a shilling on the Ubuntu forums, and as Google has been worse than useless every time I search for problems as detailled as these (it's like K-Mart: it has what you want until you go to look for it!), and as my one self-styled "Lunix-Geek" friend (now in the UK) has only briefly battled the xserver-xorg beasts, I'm coming here to see if anyone knows something else I could do besides bite the bullet, say goodby to my accumulated goodies, and reinstall Ubuntu.
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Dec 31, 2010
I have an acer aspire one netbook and in display properties it says the monitor is unknown. The trouble is that the screen is widescreen (16:9) but it has it as (4:3)so the screen is sort of stretched. Is the a terminal command as another way round this or how can i get the screen recognised?
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Sep 30, 2010
I have windows vista. i tried installed linux-ubuntu 9.10 but not knowing after a point on how to proceed further, i quit half-way. so my partition (14 gb)remained wasted. i tried installing again in a new partition and got it done. from my newly installed lunux, i tried to delete that 14gb partition. and now when i restart my laptop, i get this error :
GRUB loading.
error: unknown filesystem
grub rescue>
I would like to know what exactly has happened and how do i get this resolved.
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Apr 13, 2010
Because of the configuration of my house, I need two routers.I have a DLink ADSL router as my main router and the Belkin N1 as my repeater.I have set up the IP address in the Belkin to be 10.1.1.10 - my DLink is 10.1.1.1. I have disable the dhcp in the Belkin and set the DNS as ISP provided. [URL]..I have set the channel to 11 and in the Ubuntu Network Manger I have set the IPV4 to Link Local Only. I can see the Belkin and connect with my PC.but it will not take me through to the internet.
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Jun 18, 2011
I want to set up a Linux box as a wireless router to replace our existing Netgear WNR1000 router, as I believe the Netgear does not support the coming IPv6 protocol. Unfortunately, it is not flashable with OpenWRT or DD-WRT presently.
As we have Comcast, our cable modem acts as a dumb modem according to the customer support guy I talked to, and our router is the one that asks for the IP address from DHCP. Thus, when Comcast switches over to IPv6, I don't believe my existing router would work, correct?
My idea is to take a Linux box and put two NICs and a wireless adapter in it, using IPCop or Smoothwall to set up a router. I could then enable IPv6 support for when we have IPv6 with Comcast. Is that possible? Would there be a way to get BIND to hand out private IP addresses in the same subnet on the both the LAN NIC and the wireless card?
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Apr 24, 2010
I'm having trouble getting my network set up the way that I want it/had it. You see, when I first set up my network, I just had my cable modem going directly to my standard wired router (A D-Link DI-604), which had DHCP,and was connected to all of the computers on my network. I had one switch hooked up to one of the ports of the router, but this was a regular switch, and it would not try to assign IP addresses, it would just pass through the DHCP info as I wanted.
Now however, my network setup has changed. My room mate and I both got laptops, and we decided that we wanted to have wireless access so we didn't have to constantly plug in to the router.
Now my network is set up like this: The modem is hooked up to the router(DI-604), which is hooked up on the LAN side to our computers, our switch (which is hooked up to 3 more computers), and to a wireless router card (A Gigabyte GN-BC01).
The wireless router card has two jacks for ethernet. One for WAN, and one for LAN. The LAN side we have plugged only into the computer in which the card is installed.
Now the problem is this: The wireless router card comes with DHCP by default, and it's assigning addresses to the laptops and to the computer hat it's in, and worse, the IP addresses are on a different subnet than that of the main dlink router. The Main (dlink) router assigns addresses from 192.168.0.1 (itself) to 192.168.0.254, while the wireless router card assigns addresses from 192.168.1.1 to 192.168.1.254 (itself).
Because of this, I cannot access services on the wireless network from my wired network or vice versa. The first thing I tried was setting the card to assign addresses from 192.168.0.12 to 192.168.0.253, however it just said "internal error" when I tried to do this. I decided that this may be because it sees that it was being assigned an address on it's WAN side on the same subnet. So the next thing I tried was disabling DHCP and setting the "LAN IP Address" to 192.168.0.12, hoping that the DHCP would just go through the card, like a switch. I would have set the LAN IP address to be assigned by DHCP, but this was not an option, so I decided that'd be the best thing to set it to.
Once again however, setting the LAN ip address to an address on the same subnet as that of the IP assigned to it's WAN side caused it to report an "internal error". I verified that this was the issue by setting the LAN address to several other private IP addresses to test (I.E. 10.0.0.1, 192.168.3.1, 192.168.5.12).
My question then really is: How do I set up both routers so that I can access services and computers from each network from the other network. Should I set them with different subnets and set the gateway on the wireless network to the main router? To the wireless router card? Should I put them on the same subnet? Will it know how to communicate?
Here is a link to (picture) my network diagram. Network Diagram
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May 17, 2010
I am using ubuntu lucid and am able to connect to my ThomsonTG585 wireless router, but my mother who uses win7 is unable to connect, except by Ethernet cable, which is not convenient, how can I get her connected. When I try to connect, It it says "limited connectivity" and does not let her utilize the internet. My brother is dual booting ubuntu karmic and winXP and is able to connect on both os's. I am absolutely sure I am entering the correct pass-phrase and ssid.
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Jan 20, 2011
I'm currently moving a lot (200G) from an external hard drive on one pc to an external hard drive on a laptop and I'm using scp to do it. I have a bt home hub 2.0 and as luck would have it my laptop keeps getting disconnected from the network.I'm worried that this will result in data loss or corruption as this has happened about 5 or 6t times just that I was aware of.
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Mar 26, 2009
These r IP provided by my ISP that i've put on Fedora 8:
WAN IP:xxx.xxx.xxx.17 (eth0)
Subnet:255.255.255.252
Gateway:xxx.xxx.xxx.18
Valid static(public) IP set of 2:
IP:xxx.xxx.xxx.147 & 148 (eth1, eth2)
Subnet:255.255.255.240
i want to run xxx.xxx.xxx.147 as a web server & xxx.xxx.xxx.148 as a ftp server. but I'm able to ping only xxx.xxx.xxx.17(WAN IP) from outside world. Can any1 tell me that how can i bring my 147 & 148 IP online without router.
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Mar 25, 2010
I was wondering whether or not it is possible/advisable to install and run Snort on a single laptop with a wireless router (firewall enabled)? Does Snort require root privileges and are there any other issues one needs to be aware of when installing and running software like this?
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Dec 8, 2010
i have a problem with my new router and ubuntu 10.10. The problem is that my internet connection show me that my laptop had connect to internet but my browser can't open a website ( this problem is the same with my netbook ) to fix it always must turn it off and after on either it never makes.
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Dec 29, 2009
I've just spent the entire night trying to get my computer to share Internet with my laptop. I have DSL Internet with the modem configured to bridge mode. On the openSUSE server I have two NIC's. When setting up the DSL (pppoe) it created a dsl0 which is using the NIC eth0. So now I have dsl0, eth0, and eth1 I configured eth1 for DHCP server. When I connect with my laptop using DHCP it gets an IP address just fine. However I can't access the Internet. I think my problem is in the Kernel IP Routing Table. Here is the output from /sbin/route -n
[Code]...
dsl0 obtains IP from ISP eth0 is set to DHCP although that confuses me because how can the same NIC have two IP Addresses? eth1 static IP 10.30.60.1
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