Managing and using network connectivity on a Ubuntu system

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14.04 - Mac Mini - wireless connects but no Internet

I was able to install 14.04 on a Mac Mini pretty easily. However, (and I have searched for answers, here and other sources), the behavior is as follows: 1) Able to connect to Internet via Ethernet ...
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1answer
7 views

Adding firewall rule makes multiple entries

I am trying to add a rule to my Ubuntu 14 iptables to allow NTP (123) though using the command for "Allowing Incoming Traffic on Specific Ports" here: https://help.ubuntu.com/community/IptablesHowTo ...
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2answers
3k views

where is /etc/sysconfig/networking/devices/ directory in ubuntu

I am trying to setup usb gsm Modem. I can't find /etc/sysconfig/networking/devices/ directory to put driver configuration file. In ubuntu where can i find this directory? I want to put ...
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7answers
2k views

What non malicious uses are there for ping's flood (-f) option?

I have been reading up on common ways in which people attack each other on the internet through things like DDOS attacks etc, and how one would defend oneself from such attacks, and I have come across ...
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1answer
22 views

Ubuntu server cannot access internet, however can use SSH

So as stated I can access my server remotely, and locally using SSH, however I dont have access to "The internet". By this I mean I cant access webpages. dtipp@mc-server:~$ ping www.google.com ping: ...
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9 views

Network problems setting up an Ubuntu server in VirtualBox

Before I get into my problem I would like to start with what I am trying to accomplish in case my approach is non-optimal. I want to setup a virtual environment that mirrors our production ...
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0answers
16 views

How do you update the DNS resolver configuration without causing downtime?

A note New question, since everything else on this matter appears to be outdated and/or conflicting. Hold your close votes, please :) The problem On stock installs of Ubuntu 12 and 14 Server, the ...
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1answer
22 views

What is the difference between “Cloned MAC address” in “Edit Connection” GUI and ifconfig command?

I found that there are at least two methods to assign a spoofed MAC address to my network connection: Assign a MAC address to a connection using "Edit connection" GUI in WiFi (or Ethernet) tab ...
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2answers
43 views

How to lock down connecting to a specific WiFi

I have a laptop what has WiFi on the motherboard, but it only supports 802.11a/b and WEP. My WiFi network is 802.11n with WPA2-Personal. So I purchased a USB wireless stick that's compatible with my ...
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7 views

belkin n300 f9l4500 doesnt work on ubuntu 14.04

I am running ubuntu 14.04. I am relatively new and I tried to install ndiswrapper-1.59 and it say there is now directory at all. I do not have a wired internet connection at all (my apartment only ...
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3answers
96 views

unable to click disconnect wifi on my ubuntu 12.04

i have a problem related with wireless network on my Ubuntu 12.04. as you can see, my wifi can connect to network, but when connected, the 'Disconnect' item on my wifi is disabled thus i can't click ...
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1answer
68 views

Can't edit connections/connect/disconnet in Gnome NetworkManager applet

since a few days I'm seeing a weird behaviour of the NetworkManager-applet in Gnome. The "Edit Connections" line is greyed out, so I'm not able to call the nm-connection-editor. From the command ...
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1answer
44 views

WiFi randomly turning off or disconnecting (lenovo t540p, Ubuntu 14.04)

I installed Ubuntu 14.04 on my lenovo t540p. Everything is working good, however, the wireless keeps turning off or disconnecting from time to time. This is my iwconfig: eth0 no wireless ...
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2answers
57 views

WiFi connection to router but no Internet connection?

I installed Ubuntu on my EasyNote-TM86 today. I can't access any websites although I am connected to my router. Other devices (including my laptop before I installed Ubuntu) are able to establish a ...
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0answers
18 views

Network disconnect option grayed out (Issue still apparent on latest releases and updates)

With the latest updates I've received for my Ubuntu 12.04 64-bit machine, I am no longer able to select the "Disconnect" option when I use the drop-down menu under the connectivity task tray icon. ...
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1answer
25 views

how to configure USB mounted WiFi WLAN Adapter

I have a WiFi USB adapter/router . This adapter is using Realtek Semiconductor Corp. RTL8191SU. and supports WLAN 802.11n the output of lsusb gives me the following output ID 0bda:8172 Realtek ...
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1answer
31 views

can not enable wifi on Xubuntu

Please read the question in full before marking it as duplicate, I have just installed Xubutu 14.04 on my VGNFE31H laptop The laptop has two wifi devices. First: The laptop has a built in wifi card ...
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12 views

Network Manager StrongSWAN IPSec connection: add exception route

I just upgraded my VPN server from racoon to OpenSWAN (pfSense from 2.1 to 2.2), I managed to craft a working configuration for Ubuntu by following this wiki page. I added '0.0.0.0/0` as a subnet ...
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28 views

Cannot able to connect to another host

After few self tests, I thought I'm having a telnet problem. So I am recreating a shorter version of this question I have two machines: cassandra is running on one machine using IP 172.17.1.XX. ...
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2answers
25 views

Unable to connect to Remote Desktop ?

I am trying to connect to Remote machine (Windows 7 OS) using Remote Desktop Viewer. Protocol I'm using is RDP and Host is local IP of the machine I am trying to connect to. On Windows I have ...
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2answers
51 views

Ubuntu 12.04 In tray Icon -> “Edit Connections…” not clickable

I am use ubuntu 12.04 with gnome-panel, I press network tray icon then Open following small menu, Last "Edit Connections..." not clickable how can I edit my wired and wifi connection?
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22 views

How to get web interface for ubuntu 14.04 [on hold]

I want to enable web interface for my ubuntu in virtual machine over windows 7. Can you suggest which networking adapter should be used.. Thanks in advance
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3answers
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Connected to wireless, but no internet access

After installing Ubuntu 12.04 a week ago wireless internet had been working fine. It stopped working yesterday, however, and I'm at a loss for what to do even after scouring replies to similar posted ...
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49 views

Network issues on 14.10

I have installed Ubuntu 14.10 on my desktop computer in the office, but I'm having troubles with the network. The issue is that I can't make it connect to the network at all, as it displays icon for ...
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1answer
16 views

Connect to remote Ubuntu Server GUI

I have a server running remotely by ip address 5.231.XX.XXX running Ubuntu 13.10 Operating system. I am using Ubuntu 14.04 on my laptop. I am able to connect to my server via terminal by ssh login ...
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Ubuntu 10.4 ETH0 info missing

I have tried finding help regarding this issue at other forums with not much luck hoping someone can help me here. Here is my issue... I am running Ubuntu 10.4 server that's been running good for ...
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2answers
48 views

Ubuntu 14.04 - Hp pavillion dv5-2239la Can´t load Webpages

I recently installed Ubuntu on my laptop, (Linux Mint 17.1 Cinnamon x64) Now, im conected to my router via an access point to amplify area on my house. Note: Ubuntu works well conected directly to ...
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1answer
12 views

Not reaching Gigabit (~30MB/s) with Ubunut 14.04

So I have a dual boot setup (Win7/Ubuntu 14.04) on my Samsung Laptop Np530U3C. When booted into Win I get via wired network transfer to my desktop machine (win8.1) around 80-90 MB/s (read and write). ...
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1answer
99 views

Cannot connect to internet running Ubuntu 14.04 using VirtualBox on my MSI GT60 - Windows 8.1 x64

I'm unsure if I am asking this question in the right place so please refer me elsewhere if necessary. I installed VirtualBox v 4.3.2 on my MSI GT60 running Windows 8.1 x64 a bit ago and created a VM ...
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0answers
12 views

How do I configure Ubuntu to share wifi connection with a single computer on a LAN?

I have 3 computers, 2 laptops with wifi and one PC with no wireless connection. I wish to use one of the laptop as a wireless gateway for the PC only. I know how to share with qll computer on q LAN, ...
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1answer
29 views

iptables - redirect DNS queries

I already have the following iptables rules applied in order to masq all of the wlan1 traffic through wlan0. *filter :INPUT ACCEPT [48:6144] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [47:6078] -A INPUT -i ...
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1answer
33 views

Ubuntu keeps asking for Wifi password

I've recently installed the latest version of Ubuntu (64 bit), alongside my Windows 8 dual booted machine. The problem I'm having is trying to connect to my school network, the school uses a username ...
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3answers
60k views

How to set static routes in 12.04 Server

I have used Ubuntu since Ubuntu 8.10; today I'm working with Ubuntu 12.04 Server. I am having difficulty keeping static routes on booting. I would usually put the route commands /sbin/route add ...
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19 views

Route only traffic on specific port through VPN

I would like to route only traffic on a specific Port. In my case for torrents through a VPN. For Transmission the port is 51413 I think. I only found tutorials how to set this up on a router but I ...
2
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1answer
23 views

Porting WiFi network from NetworkManager to /etc/network/interfaces

I'm trying to move a WiFi network configuration from NetworkManager to static configuration in /etc/network/interfaces. The fully working NetworkManager configuration that I have right now is: ...
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1answer
510 views

Can not connect Qubee Shuttle (UH235) Wimax USB Modem in Ubuntu14.04

I am using Qubee Shuttle (UH235) Wimax USB Modem with windows 8.1 which works fine. But when I try to connect it with ubuntu, it can not recognize the modem. I talk with my friends from university, ...
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0answers
11 views

using sctp_recvmsg is the best? How?

I have just started with sctp and wrote my first program with it. I chose one-to-many communication style. Mainly I did things according to RFC 6458. (I used other source as well, but mainly I was ...
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1answer
34 views

Why can't I access my Ubumtu box on my LAN?

I can definitely access the external internet... via ping, wget, apt-get install, web browser..., but for some reason, I cannot ssh to my 14.04 server or ping it or or access any of the web sites i'm ...
0
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1answer
15 views

Can't connect to Internet via D-Link Dir-600 Router on Ubunto 14.10

I recently installed Ubunto 14.10 and have trouble accessing the internet with my current network setup at home. (Cisco EPC2308G Moden - D-Link DIR-600 Router - Samsung R540 Laptop) I can access the ...
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Sniffer: Request ARP

I need your help. How can I detect if there are several ARP REQUEST coming from the same machine "sniffer" in my local network, I need a source code example in python and not tools. thanks,
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0answers
22 views

Access a file on a remote Ubuntu machine using Java

From java running on Windows, I need to access a file on a remote Ubuntu machine. I use the following: URL U = new URL ( "http://" + SERVER_IP + ":" + SERVER_PORT + "/" + ClsName + ".class" ); ...
0
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1answer
10 views

Network failure when booting with network cable plugged

I now ran into this problem with my laptop. I can't establish an ethernet connection when I boot the system with network cable on. However, when I boot with network cable unplugged but connect it ...
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2answers
14k views

Proxy authentication with terminal Ubuntu 14.04

I would like to access the internet to update files etc. from the terminal on a secured proxy network. I've already tried the following: Adding to /etc/apt/apt.conf, /etc/apt/apt.conf.d/01proxy, ...
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0answers
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Ubuntu loses network connection and dpms becomes re-enabled after unplugging AC adapter on Macbook Pro

On Ubuntu 14.01, when I unplug my AC adapter, the network connection is lost (even with connected to wired via eth0). Also, the dpms settings are lost. So even though I run "xset -dpms", that setting ...
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Why can't MAAS VM Node Commission properly

My issue appears to be with the MAAS Proxy. I used Ian Zoratti's VirtualBox extensions link to his GitHub site so that the MAAS Cluster Controller is able to start up the VM properly and pushes the ...
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1answer
86 views

Link aggregation on a LXC bridge

I'm working on a server with a number of various interfaces (eth0-3) and I currently just use one for both host traffic and another for my LXC bridges traffic. Since I have a few spare ports just ...
0
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2answers
36 views

No coffee shop WiFi for just me

I am currently in a coffee shop I frequent regularly and I am finally fed up with my issue. Some how I am the only one in the entire building that cannot use their WiFi. I see OSX and Windows ...
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0answers
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MAAS Network and NAT

Here is the case: 1) I have a public network connected to internet LAN #1 2) I have another private network for MAAS and its DHCP and DNS , LAN #2 3) For internet connection i need to enable NAT ...
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6answers
13k views

How do I fix broken networking in cloned virtual machines?

I've set up a virtual machine configured with bridge networking. After making eight clones of it, the new machines can't connect to the network. I've instructed VirtualBox to re-generate the ...
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0answers
14 views

N WiFi Adapter only working in G mode

So, I have a PC running Ubuntu 64-bit in my bedroom, and I am trying to use the onboard WiFi (Broadcom 43228 802.11a/b/g/n) to connect to the router which is 2 floors down on the ground floor. The ...