Ubuntu Servers :: Networking - Machine Refuses To Give Access To The Internet Via Firefox
Sep 21, 2010
I have a machine (lets called it machine 1) with two networks card, eth0 and eth1. Both have static IPs. Once in a while the machine refuses to give access to the Internet via Firefox (eth0 is the route to router). Other machines on the network have no problems accessing the Internet. Eventually the machine would just magically start working again, but this time it just seems to have stayed broken. I've done some simple diagnostics and found:
a) I have another machine running Apache with a Wiki on our network - [URL]. Machine 1 is unable to connect to this Wiki. I get 'the connection has timed out'. I can ping 192.168.1.73 and it responds in the usual fashion.
b) If I try to ping www.google.com it times out with: ping: unknown host www.google.com. I can ping google using its IP address.
c) On machine 1 I have tried traceroute on both www.google.com and its IP and I just get:
1 * * *
2 * * *
And so on until hop 30. Doing this on any other machine on the network works. So while it seems I can ping internally in our network and outside, but when it attempts anything traceroute or URL related it does not work.
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Aug 1, 2010
How to give nfs share access to only particular user at client machine.
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Oct 7, 2010
I am able to access internet, can ping other machines and can ssh into other machines. But cannot be pinged (it just hangs), and when trying to ssh into machine, it also hangs (no response)I checked the sshd daemon, it is not runningchkconfig --add sshdreboot, the sshd does not seem to come up.
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May 3, 2011
I just loaded Ubuntu 11.04 onto Acer Aspire 5100 computer. I can access the internet through Firefox when I connect ethernet lan cable but it doesn't work when I use wireless connection. Although I do get the indicator in top right that says my wireless connection was established. Why I can't access internet with Firefox in wireless mode? I tried toggling the wireless switch in front of Acer but that didn't work.
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Oct 31, 2009
I have a WindowsXP virtual machine which I need to isolate from the host machine completely (have the host act as a bridge but not be visible on the IP layer at all.) It still needs to have Internet access. Obviously it has to be able to contact the router but I would like to be able to block port 80 (or even just block all SYN packets addressed to the router.) I also want to allow port forwarding from the router to the virtual machine. I can use basic iptables but this is way beyond me.
The host OS is probably going to be Debian Lenny but this is not built yet so if someone can recommend a different distro which is as lightweight as possible but will support VMWare, iptables and tcpdump then that would be great. I was thinking of Slackware but I have not used it in ages and from what I can remember their is no real package management.
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Feb 12, 2010
Apache by defaults points to /var/www/eachdomain. I need to be able to give users ftp access to /var/www/specific domains.
It seems that if I change the owner of /var/www/specificdomains/ to the user in question, then www:data no longer owns the directory and Apache starts to have issues..
What's the best way to set this such that I can allow users to FTP into specific directories, and still have www:data own them? I'm currently using vsftp, but that can easily change.
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Sep 5, 2010
just learning qemu. Been able to figure out everything fine, except one thing: what do I need to add to my qemu command-line to give my VM access to the Internet?
I read online docs, but to be honest, the VLAN/TAP stuff they describe doesn't make much sense to me.
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Aug 15, 2010
I am coming from Windows XP Pro, on the same machine (and where I am writing this post from) so the internet clearly works on XP. On F13, the eth0 connection is activated and the drivers for the NIC chip were installed with the OS. The NIC is Intel Pro/100 VE. The problem that occurs is that the system updater (in GNOME) can access the internet, and installed a bunch of updates after installing the OS. I know it can get to the internet because the updates worked and in the System Monitor, I can see both uploading and downloading occurring during the updates. Now the problem is that when I open FF, I can't seem to get to pages, and I get the usual FF error (pic -- [URL]). However, I CAN get to [URL] as well as [URL] , but I cannot access several other subdomains on fedoraproject.org . I also cannot get to any other page online, ([URL] for example).
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Nov 28, 2010
How do I set up a server to where it does not give a password prompt to access a shared folder?
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Feb 8, 2011
So, I am looking to implement an FTP server with Isolated Client accounts/directories where a client can only access what's in their directory. I also need to provide my internal user's (content managers) the ability to upload, delete, etc from all of the Client accounts. The simple part is creating the secure client accounts. It's a matter of changing DIR_MODE in adduser.conf to 700 or 770, creating a user, having the FTP server chroot them to their home directory, revoke/restrict shell/ssh access and maybe even slap on some ACL to prevent botched permissions.The hard part is figuring out how to give my power users the ability to access all of their folders without thrashing security.
My first thought was to put all of the client user-groups in a parent group and having my internal users inherit group permissions..but you can't have groups inside of groups.My second thought was to put all of the client users in the same group and prey that the FTP chroot is enough to keep them from poking around but then I have the problem of how do my internal users access other user directories if they are chrooted. Do I create a second server without chroot.do I create some weird nested homedir structure..I honestly have no idea how to satisfy both requirements (secure client accounts and privileged user accounts). I need my privileged users to authenticate against Active Directory via Likewise open, LDAP, etc and I don't care how the clients authenticate. Though, I would prefer to have both file and FTP-server level protection just to make sure no one can see the other client's data.
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May 17, 2010
I have a laptop running Ubuntu 10.04 with wireless working out of the box. I've been using it for the past few weeks because my iMac G5 has really slowed down with OS X. Today I installed 10.04 on the iMac G5 as well. However, wireless isn't working out of the box as it asks me to install the Broadcom wireless driver. The problem is, without this wireless driver, I can't install the drivers.
I am wondering if I can connect the laptop, which has wireless, to the iMac with a spare ethernet cable to give the iMac internet so it can download the driver.I'd rather not have to unplug it and move it downstairs to the router just to install the drivers.
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Jun 6, 2010
I dual boot windows xp and ubuntu 10.04 LTS and the wireless card works perfectly fine in xp so I know its not a hardware/network issue. In ubuntu, it detects wireless networks, will connect to network and work for about 20 seconds.
[Code]....
and it continues on after this alternating between a normal 20ms and high ping over 200ms. The connection refuses to load anything off the internet/local network.
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Feb 13, 2011
I try to access my ubuntu machine via my Windows Machine (Samba Server on Ubuntu Machine). Anytime I try to access the machine it asks me for my password...I enter it but it says it is invalid....is there anyway to reset it? I have already tried to remove and purge everything Samba related and then tried reinstalling, but that still didn't do anything
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Mar 18, 2010
I have an ubuntu kk laptop connected via wireless to my mixed network (xp, win7, other ubuntu), but i can not ping said machine or connect via ssh. Internet and smb-browsing ON this machine work, as does pinging FROM it. If this was a windows machine, I'd say a firewall is in the way, but since it's a vanilla karmic install, this should not be the case (or should it?).
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May 13, 2010
i want to know that which application in linux will give me access to the router like in windows we use hyper terminal or i have to install a particular package
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Mar 31, 2010
I've just installed Ubuntu 9.10 in my laptop. Everything works fine except for my wireless. It works, but much, very much slower the through RJ45, which is perfectly ok. When using wireless i can't even connect to any online messaging service and I need to reload pages oftenly. My security setting is WEP 128 bits ASCII and since I'm trying to follow the format suggested on the thread "HOWTO post a Wireless issue" I'll try to provide the infos like requested on it. Laptop brand and model (I'm from Brasil, so it's a brasilian model)
Code:
Semp Toshiba IS 1412
Wireless Card
Code:
ID 0bda:8189 Realtek Semiconductor Corp. RTL8187B Wireless 802.11g 54Mbps Network Adapter
Interface
[code]....
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Dec 16, 2010
I am in a pvt n/w 192.168.0.0/24 and my friend is is another n/w 192.168.1.0/24 . He is in another location. Can I access his machine through vnc over internet ? I have centos 5 and he has suse 10.
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Apr 9, 2010
I need to access a Windows Server 2000 machine using a Linux machine via KDE, but that will migrate to Gnome. The Linux user to connect to Windows machine, you should open an application 'XYZ' automatically, and only this, denying any unauthorized access. When you close the application 'XYZ' communications (RDP?) Should be terminated. Do I need a log of accesses and possible attempts to circumvent the system and access other application.
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Mar 1, 2011
I've run into a weird problem. Two of my linux machines (A and B, both running CentOS 5.5) are connected to the same wall ethernet socket via a hub. Bothf them are configured for static IPs. The trouble is that when machine B goes offline or hits a kernel panic, machine 1 goes offline too. What I've noticed is that in this condition the "route" output from machine A does not show any entry for the default gateway either The contents of /etc/sysconfig/network-scripts/ifcfg-eth0 for machine A are:
Code:
# Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller
DEVICE=eth0
[code]...
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May 12, 2010
I have 17 system (sys1,sys2,sys3.....sys17) in my office, and i am willing to setup a dedicated system to act as a firewall for that i have selected sys1 with two NIC(eth0 for local network and eth1 for internet) and i have configured to access internet in my office for that i have opened a wellknown port 80.but my clients are not accessing the internet..
and please check my sample IP configuration !!!
interface : eth1 (ISP IP)just for example
IP :192.168.0.2
gateway:192.168.0.1
dns:202.56.230.5
dns:202.56.230.6
Interface : eth0 (my local lan )
192.168.1.1
255.255.255.0
IP address of xp clients ranges form 192.168.1.2 to 192.168.1.16 with default 255.255.255.0
my question is that which gateway address and dns i have to give to my clients for accessing internet ?...
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Mar 29, 2010
host - ubuntu 9.10 desktop
virtualizer - VirtualBox
What will be the easiest way to ssh connect a VM on VirtualBox, exporting its desktop to host, while it is already running ? I found; Howto Access via ssh a Virtualbox Guest machine.
[Code]...
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May 10, 2011
I have Ubuntu server 11.04 (LAMP, SAMBA) installed with the ubuntu-desktop interface (I am not yet experienced enough to run without it).My problem is I am trying to share the www directory through samba so I can edit the site, but no matter what I do I get errors when I try and access the directory form the other machine.I did add it to the smb.conf file, and it does show up fine on teh network, however, when I try and open or change the contents of the directory it says I am unauthorized.I tried:
Code:
sudo chown <sambausername> /var/www
even tried
[code]....
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Dec 15, 2010
I have an acer aspire one notebook (I gather firefox 2 is interwoven on the system?). Anyway, keep pressing firefox icon and it churns over put nothing happens. I found the following advice on another site: (Sorry this is so long, but I wanted to give you as much info for you to help me)
Press Alt+F2 to show the Run program window. Check Run in terminal, leave the input field blank, and click Run to open a terminal. If you're not familiar with the Linux command line just follow the instructions step by step. The easiest way is to simply paste the commands into the terminal with Ctrl+Shift+V. Most of them will only give feedback if an error occurs.
The first command uses wget to download Firefox 3.6 from an official mirror. You can edit the lang variable at the end, in this case en-US, if you'd like another language. All available languages are listed here, just hover over the download link to get the language code from the status bar.
wget -N [url]
The next step extracts the just downloaded file and modifies a link to point to it. In a few cases a connection refused error message may be triggered by sudo, which is not an error but a bug in sudo and can be safely ignored.
The next step links all plug-ins (not to be confused with extensions) to it.
Launch the profile manager using the command below. Create a new profile, name it anything you like and select it. If you want to keep your bookmarks export them via the bookmark manager first. You can then delete the old default profile.
firefox -profilemanager -no-remote
As a bonus you can also change the icon to the official Firefox icon.
Finally reboot the AA1 to make the desktop aware of the new icon and browser location.
However when I try the above I get the following responses at each point:
I do now have a new icon on the desktop! but still no internet.
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Sep 6, 2009
I have just upgraded my system from fedora9 to fedora11.IN 9 i didnt hav any problem in accessing internet from firefox.but here in fedora11 firefox is not working .firefox cannot establish a connection to the server.i have tried to fix the problem by disabling firewall and proxy.but still im having the same problem..
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May 19, 2010
After my "upgrade" to 10.04 I am unable to access the internet at home with wireless using Firefox, but am able to access the router. I am however able to access the internet at work, both use WPA password protection. I was also able to do the updates over wireless at home, despite not being able to access the internet. I am currently at work, and downloaded Google Chrome and did not import settings from Firefox, to see if there were any settings issues with Firefox itself.
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Jul 1, 2010
I installed samba server in my external HDD. But it is not shown in system ----> Administration. Is there any problem. Then How to give permission to access home folder.
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Jul 3, 2009
I just tried installing Google Earth on my fresh 64 bit Fedora 11 install using autoten, which I used earlier to install java and some codecs. I also used leighs guide to install 64 bit flash and remove nspluginwrapper. All was working fine. Then I decided to use autoten to install googleearth. It failed early giving an error saying:
First error was:
resolving dnmouse.org... failed: Name or service not known.
wget: unable to resolve host address `dnmouse.org'
Error getting repository data for googleearth, repository not found
# checking installation..
Size of report file is 0 lines
Error window opened up saying:
Google earth, was not installed correctly, please check you have an active connection. From this point on, Firefox cannot access the internet. I can ping google.com and dnmouse.com successfully. I did the update that included the new firefox 3.5, so accessing the internet and my connection is active. Konversation is working correctly. Just firefox is having the problem. Message: Firefox can't find the server at start.fedoraproject.org, or google, or redhat etc.
I renamed the .mozilla folder, and restarted firefox, no luck. My /etc/resolve.conf contains the correct nameservers. Also tried a reboot, no luck, still have active eth0 connection but no FF internet access.
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Mar 11, 2011
After about a week of successful running Xubuntu 10.10 off a live USB Firefox suddenly fails to work with the message "Firerfox can't find the server" Opening the error terminal in firefox yielded the message "Livemark Service: feed processor recieved an invalid channel for http://fxfeeds.mozilla.com/en-US/firefox/headlines.xml"
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May 31, 2010
Im having trouble setting my SAMBA server correctly. I have two Win machines, one with WIN7 and one with XP. I have one Ubuntu machine and Ubuntu Server 10.04. My problem is that I can only acess files from the Win 7 Machine. When I try to map out the shared dirs on my serverI get asked for user and password, when I enter my creditensials it dosent help.. What to do? I used the sample smb.conf file and open for no restrictions..
[Code]....
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Feb 5, 2010
After a reboot (why did I do that???) one of the hard drives on my machine refuses to mount with the following message:
Code:
mount: wrong fs type, bad option, bad superblock on /dev/sdd1,
missing codepage or helper program, or other error
[code]....
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