Ubuntu Networking :: Cannot SSH To The Laptop
Jul 3, 2010
I have a laptop at home (A) and a PC in my office (B). I can SSH from A to B but not from B to A. Both A and B run Ubuntu 9.10 and have openssh-server installed. My laptop at home (A) is behind a router and I read somewhere that this could be the reason why my connection times out when I try ssh my_username_on_my_laptop@the_WAN_ip_address_of_my_ router.
The error I get is "ssh: connection to host the_WAN_ip_address_of_my_router port 22: Connection timed out". Therefore, I logged into my router and enabled the service "SSH(TCP/UDP:22)", typed my DHCP gateway ip address (also the DNS proxy ip address) into the entry for the LAN server ip address and made sure that the remote ip address is the_WAN_ip_address_of_my_router.
I'm sure I don't know the meaning of what I just wrote. I just looked that stuff up after having logged into the ip address of my router. A first question I have is whether I was supposed to use my personal ip address that I have inside the network at home (figured it out by staring at the output of ifconfig) in place of the DHCP gateway ip address (also the DNS proxy ip address) when filling out the LAN server ip address.
Then, of course, I wonder what is still going wrong. Sitting at B, I'm able to ping the_WAN_ip_address_of_my_router but I cannot ssh into my laptop (A) that is behind the router. The router allows me to change about 1000 settings but I have no clue what to do with them.
The following seems important in this context too: As I already said, I can ssh from A to B but not the other way round. Now, assume I change settings in the router. Can I test the usefulness of these settings by ssh-ing into B (from A), from which I then try to ssh into A (from B). Does this circular ssh-ing make sense?
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May 15, 2011
I until yesterday when trying to configure the wireless (broadcom) on my laptop could browse the internet and install packages normally. but now none of the connections are working
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Sep 8, 2009
I'm having great difficulty with networking on a new Acer 5516 laptop (smolt):Firstly, the NIC card isn't recognized out-of-the-box so I followed Ubuntu forum thread. No luck*
I installed the appropriate Broadcom drivers. No luck*
* However, when I plugged in a USB Ralink DWL-G122 wireless adapter, this worked and, incredibly, the internal Broadcom BCM4312 started to work (see below). Even more bizarre, after turning the laptop off and unplugging the power, upon reboot with the Ralink adapter plugged in, the NIC was on and I did a yum update through eth0.
Sadly, none of the laptops internal networking works unless the Ralink adapter is plugged in. In fact, the gnome desktop is almost unworkable and unresponsive without the Ralink adapter up. Further, I sure that this was the reason the initial F11 install was frustrating with periodic unresponsiveness.
I've tried installing both F11 386 and x64 and have booted with a F10 live USB with no luck either.
I'm contemplating trying Ubuntu next but really would like to know if someone has been successful with Fedora.
Code:
[root@localhost bin]# ifconfig
eth1 Link encap:Ethernet HWaddr 00:26:5E:15:78:7F
inet addr:192.168.1.208 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::226:5eff:fe15:787f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:12 errors:0 dropped:0 overruns:0 frame:14
code....
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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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Sep 13, 2010
I have two dual-booted Windows/Ubuntu machines--one desktop and one laptop--and both have SSH servers installed. At home, I use port-forwarding to connect to these servers externally.
I am interested however, in being able to connect to my laptop's ssh server no matter where it is. I am interested in this partly due to anti-theft precautions and partly just curiosity. I know there is anti theft software that lets you remotely modify your computer--from ANY IP address--and I want to know if you can do this with SSH. Imagine someone stole my laptop and connected to the internet in a random location. Assuming i somehow know this ip address, is there any way I could SSH to it? (I doubt the router would forward port 22 or whatever to this computer...)
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Oct 9, 2010
I have a laptop and 2 desktops all running ubuntu 10.04. The desktops are slower than sh|t and I've already upgraded their memory to the highest that they'll take, they're just really old. The laptop is super fast and amazing. Is there any way to use the operating system of my laptop from either one or both of the 2 desktops? I know how to connect to my laptop from the desktop over ethernet, and once i accidentally logged in to my laptop from a desktop in the terminal, then forgot I was logged in to the laptop and entered sudo reboot and rebooted my laptop, but I'm not trying to browse it, I want to use the video of the laptop over the ethernet to the desktop, and use the desktop's video to be a second monitor, and be able to use the mouse and keyboard of either to input. Or somehow tie them all in together and combine all their memory to running a single operating system somehow?
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Jun 8, 2010
I've just set up OpenSSH on my Ubuntu 8.04 box. Observe no firewall in system services list on ubuntu box. Attempt to ssh using putty from windows laptop attached to same router. Putty connection times out. Can ping ubuntu box from laptop.
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Jan 3, 2010
I feel I am really really close at getting this connected.
The native ath9k driver did not work. I blacklisted this driver and then proceeded to load a windows driver that came with the card through ndiswrapper.
The system sees my wireless router but I could not get connected to the router. I get the circle of death of it trying to connect though.
I then replaced the Network Manager with Wicd.
I try and connect, after setting the preshared key, and it stops at the very end saying it could not obtain an IP address.
I then try to set a static IP, and at the very end it comes back with, "could not contact wireless access point".
I feel I am so close to getting this connected I just don't know if it is a setting on my router I need to change or to look for a different driver. Driver should be fine but I'm no expert.
I have two other computers wireless'ly connected to this router currently and one of them is connected via a dual boot, Ubuntu and Win7, so at the very least these two computers don't have any issues connecting to the router.
Or I am just going to live with WinXP installed on it instead. BTW: I had no problems getting a wireless connection from this laptop when I had WinXP installed, but I have since wiped it off with a clean install of Ubuntu 9.10. Goes to show how much I want to rid myself of Windows on the laptop.
I even installed 8.04 to see if I could make a connection with that version but to no avail I could not. I have since reloaded 9.10.
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Jan 16, 2010
I am currently trying to set up two network interfaces in my laptop. The wireless connection wlan0 works fine and it's the one that I use to connect the internet. It's in the range of 192.168.0.x/24 (gateway: 192.168.0.1). The wired interface eth0 is connect to another router (gateway: 10.0.0.13 with IPs in the range of 10.0.0.x/24. The router is set up to work as an AP and the 10.0.0.x network will only be used to control a robot, so no internet access will be required in this network. The problem is that when I have both connections up, I can't access the Internet anymore. I can still ping both routers, I can enter both routers configuration pages but I can't connect to the Internet. If I unplug the network cable, Internet gets accessible again.
I'm still a novice in linux and I can't figure out how to fix this. I don't want to get into static ip for the wireless connection since I'm constantly using the laptop in different places. The objective is to use the 10.0.0.x router to have a development platform for the robot that can be used anywhere without having to reconfigure the robot for a new network, which is a real pain.
In detail, the laptop connects via wireless to the network with intenet (192.168.0.x) and also connects via cable to another wireless router(10.0.0.x). The wireless connection of the second router is used to connect to the robot. Since I can ping both routers when they're both connected, I think it may be something related to the ip routes. I'm using Ubuntu 9.10 with kernel 2.6.31-17-generic
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Jan 17, 2010
I installed 8.04.3 Ubuntu into a used laptop for a friend, it was an ex business model HP I think, it installed well and wireless was no problem, if the ethernet cable was not plugged in, I could see the wireless signal indicator, it seemed to be there automatically and I could see the available networks displayed.The user has now apparently been using it a lot on ethernet cable for a month or two and wants to begin occasionally to use wireless. She says her daughter gets wireless ok in the house on visits, so I guess that the wifi is always on and available from the (BT, UK) home hub device in the house.
The user is reasonably adventurous, and it is possible that her exploration into a new machine and a new (to her) Ubuntu from previous windows use, she may have inadvertently clicked something and turned off wifi?The user is reporting that without the ethernet cable plugged in, there is no sign of wireless being recognisedA right click on the top panel network icon shows that there is 'no network available' (X sign) and a menu item exists for 'Edit Wireless networks'I have little or no experience about wifi use, so I would be grateful for comments on how I can guide the user to elegantly make use of either wifi or cabled connection
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Jan 20, 2010
This must be a repost, but I still want to ask, how do I activate the wireless on my laptop? I've been given advice about this a while back, but forgot. Just reinstalled a fresh copy of 9.10
Or is there an alternative way to do this?
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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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Feb 14, 2010
searching broadcom ubuntu in google results in a thread that is five years old. has there been any changes? i still cannot set up my 4 year old laptop's wireless to run and i have just about given up. why should i spend my valuable time getting something that is suppose to work when i could just run windows 7 and be done with it. now this is coming from a 4 year old laptop, has anything changed? i want to hear yes but i know that wireless support in linux is absolutely atrocious and sickening, even more than 4 years ago since wireless is now the norm and linux refuses to give proper attention to wireless drivers.
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Feb 17, 2010
I occasionally stay at hotels where I get free wired internet but not wifi, I'd like to use my laptop as an access point so that I can have internet on my Ipod Touch. I know it's possible because after trying unsuccessfully in Ubuntu 9.04 a few times I decided to try it with windows vista and it took me a matter of seconds and both the laptop and ipod touch were surfing the internet. I'd prefer not to boot into windows just for this.
In ubuntu when I create a new wireless network, network manager shows that I'm connected to both the autoeth0 and the wireless network I created but neither computer has internet access.
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Feb 18, 2010
I'm totally sick of my WiFi Card, a Realtek 8187 connected by miniPCIe, althought internally designed as USB, I've tried all there is, and I've decided to change it. Which brand do you guys recommend? In my experience, I want to avoid Realtek and Atheros, but which brand offer the best "out-of-the-box" experience, and less overall issues? Intel, Broadcomm, maybe another Atheros or Realtek model, or whatever you guys think it's the best choice
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Feb 22, 2010
I was wondering if anyone knows how to find internet connections on ubuntu?i can`t find anyone, and i have installed ubuntu on a mac laptop!
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Feb 23, 2010
I have an old computer I have set Ubuntu up on to use it to learn about web services, networking and sys admin.As a first step I have installed the LAMP packages successfully. I want to reach my ubuntu computer from my laptop through my home wireless setup.
On the server I open a browser put this in the address bar and get to the "It works!" page so assume its correct.I go to my laptop, put the same number in the browser and am told that there's a problem loading that page.I figure ok, could be security or ports or something so i ping it to see if it work on that level and it doesn't.I go to my laptop, get the ip for it and then try to ping from ubuntu to my laptop - that doesn't work either.Pinging the router from both computers works fine though.What do I do now?
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Feb 26, 2010
I'm using 9.10 on a laptop that has Win7 in another partition. Within Win7 I get strong full bars for the wifi signal strength. On the same laptop in the same location, I get only 2 bars (low) wifi signal strength when I'm in Ubuntu 9.10.
I'm using the wifi transceiver built into my Acer Aspire 5732Z laptop.
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Mar 1, 2010
Can I run a laptop as a wireless server? My friend runs his laptop off of his cable box and does not have a multi-port router. How can I have his laptop wireless act as an access point?If I can't be wireless, how do I have his laptop act as a server through a usb cable to my laptop?
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Mar 12, 2010
I have a linksys networkrouter WiFi a laptop Windows Vista an a Laptop Ubuntu.On the vista machine i have 54mb/s on the ubuntu i have sometimes 1 and sometimes 25 mb/s When it was a Windows machine it was also 54mb/s.So y question what can i doo to speed it up ?
Some test results:
Windows:
Download 1368.2 kbyte/sec
Upload 86 kbyte/sec
Connection 631 conn/min[code]...
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Mar 19, 2010
I run Ubuntu 9.04 on a Toshiba NB205. I am suddenly having trouble connecting to the internet using my router or my cable modem for that matter. The weird thing is that I can:(1) connect to other networks just fine, and(2) my router/internet connection work fine when plugged into my desktop.I can't connect whether I'm plugged in with the ethernet cable directly from my modem or from my router, although both work fine when plugged into my desktop. Basically two green lights show up on networkmanager but it doesn't go from there to connecting.So the usual troubleshooting of moving the wires around and trying to connect like that just suggested that my laptop doesn't connect on the one router/internet connection that I happen to need.
sudo ifconfig
gives:
eth0 Link encap:Ethernet HWaddr xxxxxxxxx
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Apr 13, 2010
I am running Ubuntu 9.10 from the install CD on a Vaio VGN TX650P laptop to try it (my first time with Linux so please bear with me) and it all works EXCEPT it is not recognizing my wireless connection.I went to Ubuntu Help and in Section 5 - Wireless Troubleshooting, Check for Device Recognition, it recommended:1.Open a Terminal (Applications → Accessories → Terminal) and type the command: sudo lshw -C networkYou should see an output, along with the words "CLAIMED, UNCLAIMED, ENABLED or DISABLED"What I get is below (It also lists the ethernet connections as network 0) but I don't see any CLAIMED etc.
"*-network:1
description: Wireless interface
product: PRO/Wireless 2200BG [Calexico2] Network Connection
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Apr 24, 2010
I have been googleing for the last hour and a half trying to find the easiest way to set up a static IP for my laptop's wireless connection.The most promising link I found required me to delete the network manager but I do not want to do this as I often take my laptop with me so I need to be able to connect to new wlan easily. I just want a static IP so I can set up port forwarding.Is there a equivalent process to windows XP where you just manually assign a local address like 192.168.2.9 or something like that? I tried setting it up through the network manager but later read that it doesn't work for encrypted connections.
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May 5, 2010
I installed Kubuntu 10.04 on my laptop (HP Pavilion dv5-1010) and the networking was working fine for the most part, but then not sure what happened, the screen just kinda went blank so I restarted the laptop, and now the wireless won't turn on. There's a button on the laptop to turn it on and off, but I can't seem to get that to function in Linux. I'm assuming it's just a simple matter of getting the wireless to switch back on again, unfortunately I can't figure out how to do that .
Edit: I've tried to whole booting into windows and turning the wireless on there, and before that's worked, but it doesn't seem to be working this time around.
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May 6, 2010
would it be possible for anyone to give me step-by-step instructions on how to set up port forwarding on my laptop? I've been using Karmic Koala and just upgraded to Lucid Lynx and not really bothered to port-forward before, so not too sure where to start - googling gives me a lot of terms I don't understand.
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May 16, 2010
My son has been using 9.10 and when he wanted to play on his XBox live, we just connected a ethernet cable to the Xbox and laptop then clicked on the wireless icon and clicked on wired connection and then he could play on his Xbox. But since upgrading to 10.04 this just will not work. We have tried with the XBox off and on, the wired connection connects but the XBox will not find the connection.
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Jun 4, 2010
I am relatively new to Ubuntu, and Linux, and I am having a problem with it that I was hoping to get fixed. Whenever I try to connect to my home wi-fi network, on Ubuntu 10.04 Lucid Lynx, it keeps disconnecting and reconnecting...which makes it really hard to download various things. It works just fine whenever I used "shudders" Windows Vista but whenever I try to use it on Ubuntu, it won't work properly. The router I bought, to replace my old, broken one, was Linux compatible, or at least that's what it was advertised as. The laptop is an HP G70 and the method I used to download Ubuntu was the Windows Installer.
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Jun 8, 2010
I tried to follow this guide on how to setup wake-on-lan with a laptop, but instead of
Quote:
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Link detected: yes
I got this:
Quote:
Auto-negotiation: on
Supports Wake-on: g
Wake-on: g
Link detected: no
I must confess I didn't see any setting in the BIOS that directly referred to WoL, but I enabled something and hoped it should be right. Is this the problem? Is there any way to check if the hardware supports WoL other than looking through the BIOS?
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Jul 28, 2010
I have successfully created an access point on my Laptop via Madwifi drivers. A second laptop can successfully associate with the created AP. But ping is not possible from both sides.
AP on the first Laptop:
ifconfig ath0 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255 up
Second Laptop:
ifconfig ath1 10.0.0.50 netmask 255.255.255.0 up
route add default gw 10.0.0.1
Association works, but ping command is not possible from both sides:
ping 10.0.0.50
ping 10.0.0.1
What could be the problem?
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Aug 10, 2010
I have finally gotten my courage up and decided to take the plunge into Linux. I bought a used HP Pavilion zt1135 laptop, and loaded Ubuntu 10.04. The laptop has no other operating system on it. Everything seems to work fine except it won't connect to the internet. I am using a Comcast cable modem, which uses DHCP and a wired connection. It works fine on my XP computer, but on the Ubuntu laptop it claims there is no network connected. Firefox gives a message something like "No server found".
I have tried recycling the power to the modem and then booting up the laptop. I have tried unchecking "Enable Networking" and then re-checking it. I have checked the ethernet cable on another machine and found it OK. Is it possible Ubuntu does not have drivers for this laptop's ethernet connection, or that the laptop is defective?
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