Ubuntu Networking :: No Internet Access After Security Cleanup?
May 17, 2011
i installed many security programs as a switching from windows guy and decided to get rid of them last night. I uninstalledgufw, clamav(and all based packages), firestarterusing synapticbefore i rebooted the system the internet was well and working. but after i rebooted i had no internet access;firefox couldn't retrieve, update manager and apt-get couldn't connect.the computer knows it's connected to the router i see the connection established sign but I can't even connect to the router by typing "192.168.2.1".the computer can ping itself(127.0.0.1) but can't ping itself in the network (the dhcp address is 192.168.2.3) and replies "operation denied" or something like that.I rebooted using live-cd and connected with no problems; the my internet connection is fineany thoughts will be appreciated P.S.: I did a fast check on the forums and couldn't find anything related; i didn't check thoroughly though.
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Jul 28, 2011
I'm running Natty and have made two logins on the system. One for myself and family and one for the kids (teens 14-15yr) to play in without Internet access via Admin "Users and Groups". I have hidden the Internet software icons on their screen amongst others i don't want them to see on the menus. On our screen I use a Firefox addon called "Web Of Trust" that can be configured easily for the kids and another addon called 'Blocksite' that I can selectively use for them and myself etc.
I have found out that they have still been able to get on to the net somehow under their login. Will have to observe again!! In the users settings for the kids the tick box for 'Internet'and 'use modem' access is un-ticked so I presumed that would be enough! Not so!!
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Nov 6, 2010
I was wondering if there is any way in Linux in general and Fedora 13 in particular to configure system so that any service that needs access to internet will have to ask for password/permission to do so. So that I can
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Mar 12, 2010
To start off I do not have the ability to post in the Networking/Wireless thread. I attend DeVry university and in my school they recently rolled out "Bluesocket." Now that they have done this I am not able to access the internet utilizing my ubuntu laptop.I am able to connect to the network. When I open my web browser I am redirected to the "bluesocket" login page where I am able to successfully log in. The next step to accessing DeVry's internet service is to allow Bluesocket to do a scan using a Java applet. That scan is successful.
The results of the scan inform me that I am not being allowed to access the network resources because I don't have an antivirus or firewall program installed on my computer. I do not wish to have an antivirus or firewall program installed on my laptop to utilize DeVry's network resources. My question is what steps do I need to take to bypass/trick bluesocket?
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Jul 25, 2010
I wanted to know if there was a firewall program out there that can open specific ports when a program/process is run and disable the ports again when the program is closed.
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Jan 18, 2011
There is this active connection in firestarter: ec2-174-129-193-12.compute-1.amazonaws.com (Port 443 - Service HTTPS - program python)After doing ps aux | grep PID it shows: /usr/bin/python /usr/lib/ubuntuone-client/ubuntuone-syncdaemon...This comes up in the firewall in each login, how do I get rid of it and how did it get there in the first place? Another question is if there is a way to limit a program's access to the internet. For example KCalender.. The things I type up in there may be stored somewhere. How can I disable complete access to the internet for that program and any other program so they can't backup, share, check etc. ?
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Dec 31, 2010
I managed to configure my W890i phone to get access to internet through an ubuntu-based computer. It's very easy to use the phone to give internet access to the computer, but the opposite is quite more tricky. For that I've done the following
----On the phone---
-Set the USB network option to "through computer", so that the phone uses the computer's internet connection and not the opposite.
-Decide and set "Shared Network" parameters: user, pasword and workgroup.
-In "conectivity-> internet connection" set "allow local network" to "yes"
----On Ubuntu 10.04---
-Install samba, samba-client, smbfs, smbclient, firestarter and dhcp3-server
-Configure Samba (System-> Administration-> Shared folders): same workgroup as in the phone, add new user (the phone), passwd this new user. In my case the user was called "w890i" and the password given was the same.
-Once the phone is connected to the computer through USB (then select "phone mode"), a new connection appears in NetworkManager: usb0.The aim is to create a shared network that gives internet access to this device. Edit the IPv4 parameters of this new connection, set them to Manual and give an IP adress (192.168.0.1) and a subnet mask (255.255.255.0); the rest of the fields are left empty.Connect this network.
-Set firestarter to use dhcp3: sudo ln -sf /etc/init.d/dhcp3-server /etc/init.d/dhcpd
-Launch firestarter and follow the wizard. Set "allow internet shared connection", choose the device for the primary internet access, and then the device for the shared network (usb0). Then change the settings for firestarter: activate DHCP for local network, set IP to the one we gave before (192.168.0.1).
-Open dhcp3-server config file sudo gedit /etc/default/dhcp3-server And set INTERFACES="usb0"
-Set the policies of firestarter: in incoming connections, allow connections from the IP adress given to the phone (192.168.0.1). Then add rules for the ports that need to be open for this connection. I opened HTTP, HTTPS, SMB, SMTP, POP3, IMAP, IMAPS, DHCP for all the connections in the local network.
-Apply policies and start the firewall.
------------
After all this, the phone can access the internet through the computer. Two problems appeared:
1. I couldn't get access to https sites, like webmails. The phone gave a "communication error". But then I tried with Opera instead of the browser built in the phone's firmware, and I could finally get to https sites.
2. I couldn't retrieve mail, neither POP nor IMAP nor IMAPS. I thought it was a firmware problem again, and I tried out several mobile phone email clients written in java, but none of them worked.
So this is at the moment the problem. If I connect from the phone to the internet directly through 3G, the email clients work for all my accounts. I don't think it's a firewall problem, because the ports are opened for this connection
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Jul 6, 2011
I connected my laptop running with Ubuntu 11 in the LAN but I couldn't access internet.But I could ping to the other computers connected in the LAN. I tried the same thing with windows 7 in the same laptop and I could access internet.
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Feb 6, 2010
I am trying to configure my Linux router to restrict Internet access for one computer on my LAN. It needs to be restrictive based on the time of day and the days of the week. I am using the MAC address of the computer to single out the one computer that needs to be blocked. However, this is my first attempt at making any rules with iptables, and I am not sure if I am doing this right. If some one can take a look at this I would greatly appreciate it. This is what I have done so far.
Here is my thinking. Create a new target. Check the MAC address, if it is NOT the offending computer return to the default chain. If it is the offending computer check that we are between the allowed hours and dates and ACCEPT. If we are not within the time/date range then drop the packet.
Code:
Here I am trying to route all packets regardless of the computer on the LAN into the blocked_access chain for checking.
Code:
Is it a good idea to route all traffic through the blocked_access chain? I do run other servers that are accessible from the Internet, so I am not sure how this setup will affect that. I also use shorewall on the router to setup iptables for me. How would I integrate this with shorewall?
I am using squid to block access when he is using the web browser. However, he is still able to play games(World of Warcraft) and the like.
I am using Debian sid, iptable(1.4.6), shorewall(4.4.6), kernel 2.6.32-trunk-686.
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Aug 26, 2010
I have a linux box (fedora) with two ethernet cards eth1 and eth2. On eth1 I successfully configured a PPPOE internet connection. Such that from the server I can browse the internet. On eth2 I wired it to a wireless router essentially to provide the wireless cloud. On eth2 I also configured dhcp, such that the Linux box is both PPPOE and DHCP server.However my clients on the LAN cannot access the Internet.
On passing the routing command I get
Destination Gateway Iface
196.44.x.y 0.0.0.0 ppp0
192.168.1.0 0.0.0.0 eth2 (my subnet)
0.0.0.0 0.0.0.0 ppp0.
The router (functioning as a wireless access point mainly) has a fixed IP address of 192.168.1.2 and eth2 has IP address 192.168.1.1. The dhcp file running on Linux has been set with option router (Gateway) 192.168.1.1. I cannot figure out how to correctly set the routing table such that my clients on wireless can access the internet cloud. I googled and googled but no solid solution. Any suggestions?
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Feb 5, 2011
Could you pleaseme out.I have installed Virtual BOX on windows 7.Ubuntu i have installed on virtual box.Now i want to access internet from the Ubutu VM.
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May 16, 2011
I'm trying Ubuntu 10.04 but I can't figure out how to connect to the Internet. I've run lspci -k & sudo lshw -C. This is the result code...
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May 27, 2011
I am new to Linux, But, I installed it, all went well, but now, I can't access the Internet.So, I don't know what info you guys need, so just ask.Also, if it helps, I am using Ethernet (Well, I think it's Ethernet, it is a yellow cable with a rectangle end.
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Jan 25, 2010
I can not access the internet from within ubuntu. I have tried pidgin firefox and ping but I do not get a reply with any of them. I do however get full access using Virtual Box OSE running Windows server 2003 running inside the machine. This is not a one off as I often have trouble connecting to internet from inside ubuntu but usually disabling then enabling networking works.
My system:
OS: Ubuntu 9.10
Wireless card: Edimax wireless 802.11b/g Turbo Mode PCI adapter.
Here is the corresponding bit from lshw:
Code:
*-network
description: Wireless interface
product: RT2561/RT61 802.11g PCI
vendor: RaLink
physical id: 0
bus info: pci@0000:05:00.0
logical name: wmaster0
version: 00
serial: 00:1f:1f:24:43:ca
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list logical ethernet physical wireless
configuration: broadcast=yes driver=rt61pci ip=192.168.1.255 latency=32 multicast=yes wireless=IEEE 802.11bg
resources: irq:20 memory:ea100000-ea107fff
I'm really confused as to why a VM would be able to access the net and not the host.
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Jan 5, 2010
I have a Compaq Presario R3000 with Ubuntu 9.10 32 bit that I just installed last night. I'm using a Zyxel G-102 Wireless card and Actiontec GT701WG wireless modem.
When I try to connect to the 'net, the network does show up and it connects strong (100%). It also shows multiple neighbors networks. It pings at 99% success (with over 900 sent as I write this) but when I open Firefox it can't connect, it just times out. I've used WEP security and have switched off security as well. I tried hooking up to the modem via USB and get the same result. It acts like a Firewall issue but there isn't one installed - at least that I can find and the Firewall in the modem is off. I ran FF in root with gksu firefox as suggested in another thread. I tried www.ubuntu.com and the header loaded but that was all. Then it timed out.
I'm new to Linux but have used Puppy Linux with this machine and card, etc. so I know it can/does work with Linux. I wanted a more refined distro and chose Ubuntu.
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Jan 21, 2010
the bsnl modem cannot access the ubuntu 9.10
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Feb 13, 2010
I have a usb modem : huawei e220.I am using ubuntu 9.10. I can't access the internet using it. I made a connection form the mobile broadband tab but every time it disconnects .Ubuntu identifies the modem but every time i try to make a connection it fails.
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May 29, 2010
I have used other distros on and off in the past with no trouble, but for some reason I seem to have had this problem with several versions and flavours of Ubuntu on various systems. I've never solved this problem the previous times I've had it, just given up. But this time I actually need to get this working. I've recently upgraded my computer, so my old system has been relegated to HTPC duties in my lounge. I installed Ubuntu 10.04 and I'm having issues getting internet access with some programs, while others work fine.
Firefox and Evolution haven't been able to access the internet from the start.Empathy IM has no trouble connecting to my MSN and Facebook accounts.I had no trouble downloading and installing Google Chromium browser through Ubuntu Software Center, and have no trouble accessing the internet with Chromium.On the first boot after the install, Ubuntu automatically told me to update my nVidia drivers online, and did so without error.Update Manager detects updates, but fails to download them.
I successfully and flawlessly downloaded installed XBMC Media Center and some related skins and things through Synaptic, but XBMC cannot access the internet. However it can access shared files over my LAN, including Windows 7 shares.Ubuntu itself cannot access any files on my Windows 7 computer. It can access the work group and see my Win7 shares, but refuses to mount them. Strangely, XBMC can access these shares and stream media from them fine.
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Jun 21, 2010
I recently installed Ubuntu 10.04 and it appears to be working fine except for one problem: the internet access does not work at all. It is supposed to connect through a wired LAN and can talk to the router but when it comes to opening a webpage or pinging a server it doesn't work. Firefox says that it can't connect and the ping does nothing.
The computer can connect fine when booting Windows XP, but on Ubuntu it can't. Here are some details about the two OSes:
XP: Connects to network and internet
Ubuntu: Connects to network but can't mount the 'Windows Network' folder which is the only thing in the Network directory. Can't connect to internet.
I'm on a Dell Dimension 2400.
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Jul 11, 2010
I just Don't get it I did a lot of research before I downloaded ubuntu to put on a netbook because I wanted so badly to get away from windows all the raves were about ubuntu being the best I really like it except I have been so frustrated because I am not able to set up a internet connection. I am trying to use my blackberry 8320 from tmobile for this with the unlimited internet and blackberry package the net book is an acer aspire AOA 110. This is what I have tried and I am getting so frustrated.
1. paired blackberry and laptop with bluetooth both recognize each other but laptop only recognizes the blackberry as an A/V remote control so it wont even let me set up DUN it gives me 3 serial port options to connect to Dialup Networking (which the connection fails on every time) blackberry desktop servive and blackberry bypass service which it will let me connect to and it tells me they are connected but when you go to the browser and try a website it wont open a web page.2. I have obtained all the information from tmobile and tried to use the network manager to set up a mobile broadband connection and I know I have put in the info right but the connection never shows up in the connection manager so I dont know what to do from here with this either.
3. I have downloaded berry for all and have all the necessary things installed then I can get it to recognize the phone but it wont connect either (I read that the program needs to be in root and I dont know how to get it there because I am so new to this linux thing I really want to learn this and this is why I am so frustrated but I need to have an internet connection.Oh and the wireless works flawless if I take the netbook any where there is WIFI it lets me on in two seconds so I at least know I can get on the internet that way but I do not always have acess to it so would really like to get this figured out.
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Sep 9, 2010
can no longer access the internet,Deleted Network Manager thinking I could reinstall it and it would be back to its default settings. Had not been able to get online for days. Offcourse now I can't get Network manager back as I have to be online for that. I think I had stuffed up the proxy settings but can't work out how to get that back to default either. What do I do now and how do I do it?
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Sep 17, 2010
I cant connect to the internet with my wireless( or my lan for that matter, but i mainly want to use my wireless). I am going to follow the ticket provided by one of the sticky threads [URL]
1.Machine Brand and Model
Actually i am using a computer i built myself using following components
AMD Phenom II x4 965 CPU
ASRock 890FX Mobo
[Code]....
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Sep 22, 2010
I am using Ubuntu 10.04. My problem is that I am unable to access my internet using Ubuntu. My internet is running fine on Windows 7 installed on same system. I am a bit unfamiliar with Linux. I tried to configure my network settings but it didn't help. I have my system connected to my dsl router via LAN.
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Sep 22, 2010
I have loaded Oracle VM on my box which is running windows XP on my place of works network. My MCSA instructor showed us Linux and gave me a copy. So I loaded Oracle VM as I did in School, and Linux loaded up just fine and runs prefect. But i cant access the internet like i can with my VM at school. I put the network adapter to internal on the VM settings so it will use the Nic on my host.
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Oct 8, 2010
I am trying to completely switch to ubuntu as I am encountering viruses on a daily basis here in China and I'm sick of it. My problem is that I need to use a VPN to access unrestricted internet from here. The company that I buy VPN service from has pptp and l2tp but the pptp is too detectable by the great firewall and is unreliable at best.
On xp I am able to set up a l2tp connection directly using just ip address, username and password. Is there anything in ubuntu that I can use so simply? Everything I have looked at so far wants me to have a shared key or a certificate.I'm probably missing some important point which will make it work, but until then I'm stuck with xp and viruses galore.
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Nov 21, 2010
I have an issue my host os is ubuntu 10.10 and i've installed bt4 in virtualbox and i am not able to access internet from my guest os. NAT and Bridged dint work
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Jan 22, 2011
I am using Ubuntu 10.04, when connected to the ethernet through , Atheros Communications AR8152 v1.1.I can successfully access the internet. But when I try to use the wireless I can connect to the network using Atheros Communications AR9285, but can't access any internet sites. Or ping any other devices on the network.I'm using an Acer Aspire One D260
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Jun 13, 2011
I want to connect to a wireless open ad-hoc network to have internet access. It worked a while ago (1/2 year or something) but some update must have messed something up so it doesn't work any longer. Situation: There is a laptop that is running windows 7 and is connected to the internet via cabel. A open ad-hoc network is configuered with sharing of internet connection, status of the ad-hoc network is "waiting for users to connect". I want to connect with a second laptop that is running ubuntu 11.04. I can find the network and connect to it.
Problem: I cannot get any internet access while being connected to the ad-hoc network. So my questions are: how can i find out if what causes the Problem? I suspect a driver issue, but I'm not sure. required information from Howto post a wireless issue:
[Code]...
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Jun 19, 2011
I have a server that was set up by a friend so I have a location to save all my documents for work in a RAID array.
It is on a static IP address, I can ping the hub and other computers on the network absolutely fine.
I can't connect to the internet, the router in question is a Netgear CG3101D. Logging into the router I can see that the server is a trusted device and in all the parameters are the same as other computer running Ubuntu Studio.
Does anyone have any tips of how I can find out how to find what is wrong?
It is Ubuntu 10.04.2 LTS (Lucid).
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Jul 12, 2011
I have 3 laptops with 3 different OS - XP PRO, Win7 and Ubuntu (Linux). I try to connect to Internet in different locations using 2 different Internet Service Providers (ISP) and straight cable connection (not wireless).
Scenario 1: ISP number 1 - all 3 laptops can access Internet
Scenario 2: ISP number 2 - only Microsoft OS based laptops can access Internet
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