Ubuntu Networking :: No Internet Access Through The School Proxy Only For Ubuntu Users?
Jun 11, 2011
I have been using ubuntu for my college work for some time, and suddenly last week for ubuntu users in a specific Department/building lost the ability to connect to the internet through the school proxy.The problem seems to have effected only our department/building .
What is so annoying is even its the same computer we have internet if we use Windows but no internet for ubuntu.When using ubuntu the DHCP server automatically assigns IP's just as before, and we can reach the Default gateway using ping, but cant reach the proxy server. When we ping the proxy we get a message saying it refuses a connection. When using firefox or chrome we get the same message when we try to browse <proxy server not available>. The network guys says that the only change they did recently is to activate ipv6. But i fail to see how this can become a problem.
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Feb 14, 2009
i hav 2 laptops but there is only one LAN port and i recently splitted them with my own router, the problem is the internet works fine, but i cannot access the schools's network e.g. my friend's shared folder in another room, the school's shared folder, etc. i can only access my own local router network.
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Jun 6, 2010
i have squid 2.6 server running on rhel5. by default teamviewer access is deny. i want to allow access of teamviewer but not getting.
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Apr 28, 2010
Ubuntu lts server distro using on remote machine. i have remote site where internet access given via squid proxy. so when we enter in browser it start working internet fine. but on command line(bash shell prompt terminal) like wget,ping,nslookup,traceroute etc these commands does not work.
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Apr 28, 2010
Centos 5.4 distro using on remote machine. I have remote site where internet access given via squid proxy. So when we enter in browser it start working internet fine. But on command line (bash shell prompt terminal) like wget, ping, nslookup, traceroute etc., these commands does not work.
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Feb 28, 2011
I have Fedora running on the comp which is sitting behind proxy, which required username and password to access internet. The username is E-mail address.
I've tried the following to configure internet access:
My question is how can I configure internet access through proxy system wide for all applications and commands?
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Mar 8, 2010
Debian 5.02 on an AMD 64. I removed iceweasel and installed Firefox. On my account, I can access the net ok from FF, but when I login as another user, I cannot get out.
During the iceweasel removal, I suddenly got dumped out. Trying to recover I ended up restarting the box. I then again went to the root and 'aptitude remove iceweasel' and it came back ok. Then I installed FF per [url]. This worked fine on my 32 bit laptop btw. I even added a guest acct and FF worked, but not so on my 64 bit box. Any ideas on where to go?
And the reason for FF was that some media was not playing with iceweasel as it was perhaps too old? I didn't think 3.06 was that old myself, but when I installed FF, the sites that weren't playing fired right up.
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Apr 8, 2010
I've been doing some security testing in a lab environment that does not have direct internet access. From home to connect to my lab machine, I
1. SSH to machineA.
2. SSH from machineA to machineB
where machineB is my actual lab machine. neither machineA or machineB allow anything other than SSH, and machineB is only accessible from machineA. However, I really need to run yum on machineB.I have managed to get internet access via Firefox on machineB by creating a series of SOCKS proxy via SSH.
1. machineB: ssh -L 12345:localhost:12345 user@machineA
2. machineA: ssh -D 12345 user@machineC
3. machineB: configure firefox to use socks proxy, localhost, 12345
where machineC has internet without limits placed. This is the only way I have managed to get internet working. I tried using ssh -L all the way from machineB->machineA->machineC but it didn't work (even when setting Firefox to use http proxy). I tried using ssh -D all the way, but again that doesn't work either. I do have access via Firefox using socks proxy. However, yum update fails to retrieve mirror list, and from what I have found I don't believe yum supports socks proxy directly. Instead, it uses http_proxy / ftp_proxy.how to get yum to go out over the SOCKS proxy I created (same one using in Firefox)? It seems like since Firefox can access the internet and everything without issues, i should be able to get yum to tunnel through the same connection to access everything.... I tried
>export http_proxy="http://localhost:12345"
(yum.conf) proxy="http://localhost:12345"
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May 31, 2011
I am using Squid Server from last 5years. There is a site "http://www.firstflight.net", which was accessible before few days but now I am unable to access this site. If I use IE8 then getting below error:
"Internet Explorer cannot display the webpage"
Or using Google chrome getting error:
"This webpage is not available The webpage at http://www.firstflight.net/ might be temporarily down or it may have moved permanently to a new web address. Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error."
But other sites are working fine..
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Jun 26, 2009
Im trying to config my intranet to be accessible from inside the network (lan) without need of password and ask for a passwd for those who are viewing from Wan ....
Today my intranet can only be accessed from Lan, external access give me an Unauthorized message, I took look around, try #irc and still can get the appropriated help, I hope that someone here could help me on that...
A piece of my config:
Code:
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May 14, 2010
I am unable to connect to the Internet in lucid via a proxy server using apt-get or synaptic. Opera & firefox connects to the internet fine with the proxy setting.
I have tried the following solutions:
1) set proxy setting using systems|preferences|network proxy
2) editing ~/.bashrc & /etc/.bashrc
3) creating a /etc/apt/apt.conf file.
4) putting the proxy setting in synaptic
For the proxy setting I have used the both the verbose name as well as the ip address. There is no logon requirements for the proxy server. Either formats work in the browsers.
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Jun 1, 2009
Setting up an Internet proxy In the past I had set a computer to act as an Internet proxy. This would be multihomed, and running dansguardian, tinyproxy and firehol. Then webmin would be used as interface. By time I realised that this system is far from effective. Is there some other way to setup a proxy to be placed between users and the Internet? I would like (the admin) to be able to see in which sites users go and have a lot of control on access..
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Feb 18, 2011
there is a proxy server running on some machine on some specific port. so we connect to proxy to establish the connection over the internet.
now is it possible to connect to internet without connecting to proxy?
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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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Jul 19, 2011
My PC is part of a LAN so while configuring eth0, we specify the Gateway to access all other resources in the network. The PC successfully access Internet through a proxy server configured in Mozilla(manual proxy config) but the update option or the Synaptic Pkg mngr are not able to access internet anyway. I have tried the option "Apply System Wide" in "Network Proxy" but no progress so far.
I also tried to forward all request coming for udp/tcp on port 80 to the proxyserver on a specific port, but with no success. Also I can't ping any website from terminal, reiterating the fact that I can access internet in firefox through the proxy on a specific port.
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Jan 9, 2011
I want to settup a proxy server who just redirect the internet connection to my second computer. I try Squid Proxy but its too complicated for me. Can you sugest me another more simple program to do what i want?
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Mar 14, 2011
I am trying to tunnel through my college's free AP so I can get access to protocols outside of http and https. The school has an in-browser DNS redirect until you log in.The output of "cat /proc/version" on the server OS is "Linux version 2.6.35-27-generic (buildd@palmer) (gcc version 4.4.5 (Ubuntu/Linar o 4.4.4-14ubuntu5) ) #48-Ubuntu SMP Tue Feb 22 20:25:29 UTC 2011" The client OS is Windows 7. What I have done so far is use Proxy Cap to redirect applications to a Putty tunnel connected to the server. Eventually I want to tunnel that SSH connection through my school's firewall, so that I can keep encryption and have a reasonable amount of ease with setup.
I am not particularly educated on the inner workings of the DNS redirecting so I was not sure what to search for. My attempts to connect Firefox over normal http proxies failed and since all ports are blocked besides http and https I didn't attempt any socks or SSH. I have also tried simply hosting the SSH server on http ports with little success. I hope that I can do this without having to purchase a domain, but that's starting to seem like that won't be the case.
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Mar 3, 2010
i am after proxy server, i add the proxy server access username and password
[Code]....
it said the export is succecefully done, but after trying to install something using yum, its give me this [root@locVirtual-linuxtest etc]# yum install samba
[Code].....
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Jun 11, 2011
I've setup a PPTP server on my ubuntu 11.04. PPTP settings seem to be OK and I can connect to my machine from a Windows PPTP client. But then I dont have access to Internet from my Windows machine. Authentication is successful and I can see GRE traffic to my PPTP interface on my Ubuntu, but I can't reach any host (including Internet) after my Ubuntu machine. I suspect this is a routing or NATing issue.
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Dec 30, 2010
The question is related to one single desktop machine, with 3 users.
1) the superuser (me)
2) My elder son
3) My younger son.
As superuser, I can access the network (internet router) via "Wicd" perfectly well.
Both Client users can't.
Do I have to give them special user priviledges? If yes, which ones?
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Jan 4, 2010
I installed Ubuntu 9.10 onto my laptop, and having wireless issue. I was able to connect to wireless at home, but cannot at school. Then recently, I reformatted by desktop at home, and now I can no longer connect to my own connection. But yet, I'm able to connect to my neighbor. I considered installing ndisgtk package, but then i thought if I'm able to connect to some connections that means I'm not missing windows driver (maybe I'm wrong ).
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Oct 5, 2010
I'm running ubuntu 10.04 on my laptop with broadcom BCM4322 wireless card.Basically what keeps happening is my wireless will stop working, then network manager will notify me that I have lost signal. It will then try and reconnect, but it never seems to be successful. The only way I can get the wireless to work again is if I disable wireless then re-enable wireless (or do a complete system restart).
However, it does not seem to have this problem at home. The only difference I can think of from home and school is either encryption types (the university uses WEP, I use WPA) or the fact that at home there is only one access point and at university there are multiple access points all with the same SSID.Anyone have any idea how to make my laptop stop dropping connection all the time?
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Feb 1, 2011
I am trying to map to my schools shares VIA their network.
Normally on windows, I would just say Run and type the network path and it would open a window with the folders.
the path is \KNA11.XX.ON.CA you need to be on our VPN to connect to it, which I am.
How do i access this directory in ubuntu? And even better, make it a permanent shortcut or mountpoint so that i can easily access it later without having to re-mount it.
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Mar 30, 2011
i have a website named [URL]... now i want to access this website using proxy server(squid,or etc...) under my personal server named [URL]...means that [URL]...
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Jul 24, 2011
I find FTP server software confusing in Linux. Using ServU for Windows for an example, all I need to do is to create users via the ServU interface and choose a folder I want that user to have access to and their permissions, and viola, they can connect to that directory, and that directory only.
But in the the land of Linux, it apparently can't be managed this easy. I have a web server with multiple domains, and therefore multiple users need access to their own web root. So with that in mind, what FTP server software should I use (there are plenty out there) and how would I go about to create a user per domain, so that they can log in using FTP to manage their site, and only have access to their own web root, and nothing else?
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May 5, 2010
I am using Ubuntu 10.04 LTS - Lucid Lynx(great interface!). But I am experiencing a very weird problem. The wireless internet works just fine at my apartment. But when I am in my school, it just stops working at all. It didn't use to be like that. It used to work in school too few weeks before. But I don't know what happened all of a sudden. I have checked with my school system administrator to know if there has been any change with the network. He said the network has always been the same.
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Aug 23, 2010
In my university linux lab I have access to a linux network drive where I save programming code.I have ubuntu as a guest in virtualbox on my xp computer in my dorm. How can I map the linux network drive to ubuntu for use in virtualbox? I already have it mapped in windows, but can't get it mapped in ubuntu / virtualbox
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Oct 28, 2010
At home, I can easily connect to my home network with ubuntu. But at school, things are differently. The wireless security is tighter, and I need more then just my username and password to connect.
(See attachment for Screenshot)
The last two lines, okay, but I seem to need a certificate, and that MSCHAPv2, Anonimous identity. I don't understand what I need to enter in those fields. I only got a username and password from school and that's all I need for windows. So why does Ubuntu want/need more info?
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Apr 30, 2011
I just installed Ubuntu on my laptop and I found that I cannot connect to my school's wifi network while i have no problem connecting using windows. Also I can connect to my home's wifi network. The details of the wifi network are as follow:
SSID: Universities WiFi
Authentication: WPA
Data Encryption: TKIP
EAP Type: PEAP (EAP-MSCHAPv2)
[Code].....
I have downloaded the certifate required and put it in my home directory and selected that .cer when setting up the connection But I still can't connect to it
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