Ubuntu Networking :: Linux Blocked On University Network
Feb 13, 2011
I am facing an annoying problem with the wireless network of my university.The network is open, doesnt have wpa/wep, and once connected when requesting any page in the browser it gets redirected to a login page. Basically any pc running windows works fine, however if the os is linux-based than the pc connects just fine, it gets an ip, but the login page never loads. I have tried several browsers, several machines, even my android smartphone is locked out as well as all my friends running ubuntu, arch linux and others linux distros.The technical support never answered my email, and it's now 3 weeks that we are all without internet.
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Sep 16, 2009
When I first installed my OS, Elive17, I had no problems connecting to my wireless connection at home. I scanned for networks, found our home network, typed in the key, and bingo! It still works. However, I can't connect to a open network at university. It's not encrypted, so I should be able to connect. What should I do?
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Nov 12, 2010
I'm unable to get into my university's WLAN network. LAN works just fine, but sometimes it's quite convenient to be able to access stuff wirelessly. It doesn't seem to be a hardware problem, because if I configure my computer according to our computer department's instructions it works fine with Ubuntu (currently I carry around a stick to get into the Internet when I really need it and don't have a cable). Some info:
My device:
Broadcom WLAN controller on a Lenovo G560
My system:
OpenSUSE 11.3 64-bit
The drivers are installed, I can get into normal private networks, but have never managed to get into the university network except for with Ubuntu.
The university instructions tell me to use the following settings:
Security: WPA Enterprise
Authentification: TTLS
Inner Authentification: PAP
Username: My username
Password: Password
CA Certificate: Deutsche_Telekom_Root_CA_2.pem
In the KDE instructions, they tell you to write "anonymous" into the anonymous identity field, but in the GNOME instructions it says to leave it blank. In Ubuntu, I leave it blank and it works.
I've got the recommended settings, which also work in GNOME.
I'd ask the tech support here, but I am the tech support We've got it working with other systems, like I said, but not with SUSE, and I'm a SUSE fan.
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Mar 30, 2011
I'm not able to connect to my university's internet facilities under openSUSE 11.4. I have been able to connect in the past and I am still able to connect in Windows 7.When I try to connect to the university WiFi, a valid IP address is assigned to me and the gateway address appears to be correct, so I don't see a problem in the DHCP negotations. Same with my university's Ethernet: I get a valid IP address, but I can't connect to the internet.When I browse to any site with Chromium/Chrome/ Firefox/lynx/curl, the page is stuck at "Sending request". I have tried disabling my firewall - that didn't solve anything.I don't know what else I can try and the campus' network administrators are puzzled. How can I resolve my issue?
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Aug 24, 2011
I connect in Windows 7 just fine. I got University of Texas at Dallas.
I'd rather use Ubuntu all the time instead of booting up Windows. Plus my Windows is pretty slow.
Is there anyway for me to get around this?
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Aug 24, 2010
I'm having trouble connecting to the internet here at A&M through Ubuntu. It's working fine on Windows 7. I tried using manual connection settings and copying the addresses over from windows 7 and it got a connection, but no internet, and i couldn't ping anything except localhost.
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Mar 23, 2010
my laptop can't find the wireless signal of my university's wifi. My room is a bit far, so I wonder if there are solutions for this.
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Apr 24, 2011
I wonder if someone could please direct me to a really simple guide to adding a Linux Mint 10 PC to a Windows XP home network that gives clear instructions for the actions to be carried out in both Linux and Windows XP? The Linux box is connected to the router by ethernet cable. I have tried the Samba Setup Guide [URL] but it ends cryptically with "Now you need to setup your Windows PC for domain logins" and none of the IT folk I have asked at work know what that means.
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May 7, 2010
Trying to network three computers using dhcp.
Box 1: older Asus A7N8X-E deluxe w/onboard ethernet using dhcp
Box 2: new Asus M4A785-M Micro ATX w/onboard gigabit ethernet using dhcp
Laptop: Dell Studio 1745 w/Intel 5100 a/b/g wireless
Router: Linksys WRT54G set as dhcp server
Both windows boxes are set for workgroup "home"Laptop is "laptop.home"They can all connect outside to the internet but don't seem able to see each other, not even to ping each other.
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Mar 29, 2010
I noticed tonight when I go to Places, Network, it will bring up an icon for Windows Network, and I can drill down to my Windows box. But I can't see the other Linux box (a laptop running Kubuntu), and the same behavior occurs on the laptop when trying to view the Linux desktop. The laptop is connected wirelessly, if that makes a difference. Each box can ping the others, but I don't yet know how to browse one Linux box from the other Linux box.
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Mar 27, 2009
i really confuse now..many people gave recommendation for many book.i have little experience on networking
what is the best book for understand Linux Networking from Scratch..
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Mar 14, 2010
I've noticed over the past few months that my internet connection speed (D/Ls, browsing) are getting incredibly slow, but only on my linux box (my laptop, for instance, is fine - in fact, I'm dual-booting with WinXP and it isn't happening there, so I think I've managed to narrow it down to the OS alone):
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Jan 20, 2011
I need to test network card throughput and speed between two computers, one is running Fedora and other running Windows 7. Usually I would use netperf to perform this task, however I can't find Windows build of netperf. Can anyone recommend any network evaluation tool, similar to netperf (clien/server) which has both Windows and Linux versions.
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Jan 15, 2011
I setup Mediatomb on another box in my house to connect to with XBMC. XBMC will only connect though if the firewall is off on the local machine. I have both TCP and UCP ports 1900 and 50500 (the port for Mediatomb) enabled on my laptop (local) and the correct ports are open on the remote machine (my wife's vista laptop will connect through XBMC). I can connect to Mediatomb through it's web interface (to set visible folders/files) but not through UPnP (at least not through XBMC)
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Mar 12, 2010
I am unable to ssh a Linux box from other Linux boxes; also tried to window putty.Although I am getting the password prompt instantaneously.So far, by comparing logs of other server, I am just able figure out that "debug2: callback start" is not coming in ssh -vvv logs.
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Apr 27, 2010
So I set up an Ubuntu 10.04 server with apache2 installed, but for some reason I can't get to it from my browser. the iptables have all changed directories in 10.04 so I can't find the iptables. Apparmor wasn't the problem. The network hard ware is not the problem.There is something inside of 10.04 that is blocking port 80. I can ping it all day using the ip address but when I ping it useing http://ipaddress it can't find the host
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Jun 12, 2010
I dont know how, but somehow all the ports on my comp appear to be blocked except for 24, for ssh and 5900 unknown. I can connect to the network, but as far as I can tell, I'm powerless to do anything. No webpages load, I'm typing this on my phone.
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Jul 15, 2010
In my Ubuntu 9.04 installation, just a few days ago, I lost my usage of the internet. I still had internet access. Firstly though, there was a problem with the router, so I tried a friend's router (both Netgear DG834) and the friend's one worked. But in Ubuntu, I could not access any web pages or email. Skype works.
I tried using my netbook and that could access web pages okay. So then I booted my main PC into the old installation that I kept there of Ubuntu 8.04, which I am using now. And in this the internet works just fine, I can access websites and download and send email.
But in Ubuntu 9.04, it seems like something is blocking my access. I do not recall installing anything new, although something may have been updated recently. I can see the DNS servers from Ubuntu 9.04 and it gets an IP address from the router. What is the likely cause of the Internet being blocked for websites and email (but not Skype)?
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Dec 8, 2010
I recently installed the XRDP server on my desktop edition of Ubuntu v10.04 following the simple instructions available here. I did this on two computers. One computer has Firestarter installed while the other does not.
When I use Windows to connect to the Ubuntu box without Firestarter, everything works just fine. However, when I try to connect to the one running Firestarter, I get a pop up showing an error message (see the attached file).
I checked the incoming rules in Firestarter and I don't see a way to add RDP sessions to the list of exceptions. I also tried adding my IP address in the host section but this too didn't help the situation.
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Sep 18, 2010
I can't seem to establish a conncction to my site (that I'm hosting in the same computer as the gFTP client- running Lucid Lynx desktop as a server). My site is 'out there', with a domain etc. and also I work on it with localhost. I wanted to use ftp as Joomla has a 'ftp layer' for files permissions etc. But it keeps saying that I can't connect, or the connection 'was reset by a peer' whatever that means. For 'hostname' I use site.com (site is my site's name) and even tried the whole thing like http://www.site.com (I clicke on 'connect to remote, and enter that in the url). or just put it where 'host' goes (when I'm not using localhost) For user name and pass, I just enter what I usually put to access the administrator's back panel in joomla, but maybe I am supposed to use what I use to log on to ubuntu when I start my computer? note sure. Anyway I used a telnet command in the terminal and found that port 21 was blocked. MY isp says they don't block any ports so I don't know. I was able to do this last year so I don't know what is so hard about this lol In the router, I have 'ftp 21 to 21 and ip address 192.168.1.100 (ip is the same for http which is working as I have my site up) now it seems to be open as I used a command at the terminal (found from google). It's open but my ftp still can't connect to my server either localhost or to my site. there is no firewall blocking it and I think my router is set right.
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Jul 2, 2011
Recently My ISP provider blocked any kind of http proxies can be used in browsers. When I put my proxy settings in my browser, it keeps loading with no response. I've squid proxy running on my own server and worked fine before that modification.
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Mar 2, 2011
All ports are blocked only 22 and 80 are open. I scan localhost and ports are open. When I scan IP address ports are blocked.I have no firewall rules.
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Nov 28, 2009
The firewall in Fedora 12 seems to block UPnP by default, but opening port 1900 for UDP, as I have seen suggestedes not resolve the problem.have the following three scenarios:Firewall Enabled: Transmission cannot open a port by UPnPFirewall Enabled (1900 UDP allowed): Transmission cannot open a port by UPnPFirewall Disabled: Transmission opens a port via UPnP fineAny ideas? Yes, the port that I'm trying to open is also allowed. Router is a Linksys BEFSR41 v4.3, should you care
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Feb 15, 2011
Fedora 13 64. NetworkManager tries to unlink /etc/hosts and is blocked:
Code:
SELinux is preventing /usr/sbin/NetworkManager from unlink access on the file /etc/hosts.
Additional Information:
[code]....
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Nov 29, 2010
I connect to the internet at work through an authenticating proxy, and to avoid having to enter the proxy info into every app I use (e.g. firefox, wget, kde, etc) I have set up squid as a local transparent proxy which authenticates and routes all traffic to the work proxy. It has been working fine, but lately I haven't been able to connect to any https sites. I don't think I have changed the configuration, so perhaps it is the result of an upgrade, or something badly configured on my system from the start. I have tried connecting to https sites without squid and iptables and it works fine. My system is Arch linux, and my squid.conf file is: Code:
acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80# http
acl Safe_ports port 21# ftp
acl Safe_ports port 443# https
[Code]....
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Oct 13, 2010
In my work I am trying to connect my home server behind symantech gateway but I cannot but when I try to connect with telnet to ssh port I can make connection.How can I connect my server via ssh client.
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May 17, 2010
Last night I installed all the updates that were available for CentOS. Today, I discovered that all connections to port 25 (Sendmail) are being blocked except connections coming from localhost.
I tried disabling the firewall to see if anything would change but it is still blocked.
If it is not the firewall doing the blocking, what else might it be?
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Jul 10, 2011
Recently I discovered that we were accidentally running a POP server (port 110), when we only should have been running the encrypted version thereof (port 995). This wouldn't have been a problem if the port was blocked in the first place.Isn't the default iptables setup on CentOS to block unspecified ports? Specifically, this line from /etc/sysconfig/iptables
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
Right? Well, this doesn't seem to be working for me. I added some rules to allow additional ports and commented out a couple (crucially port 110), but for some reason, port 110 is open.Here is /etc/sysconfig/iptables and the output of iptables -L below that:
# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
[code]....
Why isn't "-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited" doing what I think it should be doing?
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Nov 27, 2009
I want to configure linux CentOS 5 as a router using iptable, .Im new in linux so I need the steps to do that
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Nov 21, 2010
I am in China, where some web sites(....., facebook, etc) are blocked. So I have to access these blocked site by VPN. But how can I access blocked sites by VPN and unblocked sites by my direct ADSL?
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