Managing and using network connectivity on a Ubuntu system

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apt-key fails behind proxy

Our company uses a filtering proxy which is setup correctly in /etc/environment and apt.conf.d Regular internet access via http and https work but if I try to import a pgp key from ...
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24 views

I'm unable to enable my wifi from network settings after I installed ubuntu 13.10 on windows 7 os [closed]

sudo lshw -C network this is the output of the above command: *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet ...
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16 views

Redirect connections from VPS to IP

I'm trying to develop my own "DNS" server using subdomains. Let' say I have this struture: VPS server with Ubuntu VPS server IP: 1.1.1.1 External computers on: 2.2.2.2 and 3.3.3.3 Subdomain ...
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+50

Aventail VPN tun0 dropping all packets

I'm using Aventail 10.7.1.449 on Ubuntu 14.10 and cannot connect via VPN anywhere, because all packets after the fix one are dropped: tun0 Link encap:UNSPEC HWaddr ...
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1answer
20 views

/proc/net/dev on ubuntu 12.04 x86

How can i prevent reset byte count in /proc/net/dev when there is higher than 4gb of transfert? The 'bytes' counter in /proc/net/dev wraps after bytes > 2^32. I understand that there are other ...
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47 views

How to connect to wireless network and direct connect network in the same time?

I have an old laptop with Ubuntu 14 with LXDE windows manager . I use it to connect by RDP through a crossover cable to a more powerful desktop. The problem is I have to disconnect the wireless ...
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28 views

New install of 14.04 with wired connection. getting error “Disconnected - you are now offline”

Pretty much the title. Feeling really lost. Output of ifconfig: eth0 Link encap:Ethernet HWaddr 74:d4:35:97:a6:97 inet6 addr: fe80::76d4:35ff:fe97:a697/64 Scope:Link UP ...
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1answer
56 views

Ubuntu Phone carrier disappeared

I had my Ubuntu Phone configured with a carrier and working. After enabling / then disabling flight mode, the network never returned on my device. Seems to be related to this defect: ...
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29 views

Is it normal that network-manager manages virbr0? [closed]

I recently upgraded to vivid (I know it's still WIP), and have found that network-manager shows an interface virbr0 as Connected. virbr0 is an interface added by libvirt to handle networking ...
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64 views

Can ping but cannot wget on host with bridge interface

This is driving me mad, since I have spent the las two days trying to solve this. I have an Ubuntu Server 14.04.2 LTS with KVM and libvirt. I have two guests virtual machines: pfSense-2.2: virtio ...
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1answer
35 views

Cannot connect to ftp server via browser but I'm able connect from terminal using ftp server_addr

I installed vsftpd and in the beginning I was able to connect via browser as well as from terminal using ftp server_addr. Now I'm unable to connect via browser but able to connect from terminal Please ...
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1answer
44 views

Wifi is not detecting in Ubuntu 12.04 in hp Probook 445G1

My wifi is not working please tell me how to make it correct. I only knows about how to use commands in ubuntu so I don't know (commands) what other informations related to the system I should ...
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1answer
56 views

How should I configure Ubuntu/Upstart for unusual network configuration?

I recently installed Ubuntu Utopic 14.04 LTS on a new server box I built specifically to host some virtual machines. The network configuration for this box, which contains two NICs, exposes the two ...
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13 views

Issue with BWBAR on a certain interface

I downloaded BWBAR on my vps using sudo apt-get install bwbar . I've set it up to appear in my www folder and the png and txt files does appear there and get updated. (I can see the time stamps) ...
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1answer
30 views

Keeps telling me to enter my wifi password

this is my first experience with Ubuntu OS After I've installed the OS, everything was perfect and fantastic except the wireless. Every time I enter my WI FI password it appears to me again and it ...
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20 views

Error of testing SNORT

I want to install SNORT on Ubuntu 12.04 and when I test with sudo SNORT -u snort -c /etc/snort/snort.conf, I have this error: CAN ´t set daq bpf filter to '-u snort -c/etc/SNORT/snort.conf' ...
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1answer
63 views

Intel pro 5100 AGN wireless connection problem

Hello ladies and centlemen. I recently grow an interest about Ubuntu OS. I was trying to use Lubuntu 3.16.0-31-generic(i686) on my old notebook HP Pavillon dv6. I succesfully manage to boot it. ...
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19 views

3G-modem Smartlink DG-BA3314 doesn't work in Ubuntu 14.04.1 LTS

I've bought 3G-modem Smartlink DG-BA3314 from hands and try to use it with my SIM-card on Ubuntu 14.04.1 LTS with KDE. But nothing happens on the user level. Only if I insert SIM-card with PIN-code it ...
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14 views

2 SSID's but now 1 does not work

we have 2 SSID that are advertised, a private one for company owned laptops, and then a public access wifi. 3 weeks ago it started, people could connect to the public ssid, get an IP from the dhcp, ...
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1answer
51 views

No Wireless interface on Ubuntu 14.04 with Broadcom driver on Asus R556L

I can't seem to enable the wireless interface on the newly installed Ubuntu 14.04 on Asus 14.04 I've tried the solutions on: Installing Broadcom Wireless Drivers but it still doesn't work I've ...
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65 views

No wired or wireless networking available on Ubuntu 14.04 after update

I have using Ubuntu 14.04 for sometime now but a strange thing happened yesterday. My laptop does not detect wifi or lan connections. I did some search and ran some commands. Here are the commands and ...
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1answer
30 views

What should I do not to see message about network?

Ubuntu 14.10 desktop is installed on my laptop. A message is seen whenver I boot that 'Network Service Discovery Disabled.' It seems that a problem is to be solved reading text below. What is ...
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1answer
54 views

Mobile broadband connects to 3G after selecting 2G in Ubuntu 14.04

I am using a Huawei e303c HSDPA modem to connect to a wireless network on Ubuntu 14.04LTS. The modem configuration was done using the Connection manager and the HSDPA network works flawlessly. ...
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1answer
47 views

1.9 GB iso file is shown empty [on hold]

I recently downloaded a windows game which is 1.9 GB iso file. I mounted it to install with wine and I know it works with wine but no files are shown at all!!! EMPTY! Extracted it but still EMPTY!!! ...
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24 views

How to connect multiple subnets

I have a server with 4 ethernet ports: 1 used to connect to internet e 3 used to manage 3 local subnets. I configured the DHCP server, the routing, packet forwarding for IPv4 and NAT; everything ...
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32 views

Openswan unable to connect to sonicwall [After system update]

I was able to connect to VPN previously but after my recent system update I am getting an error while connecting. WHILE CONNECTING VPN GETTING BELOW OUTPUT AND ERRORs- 003 "sonicwall" #1: multiple ...
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1answer
37 views

Can't connect to network even when it is directly plugged in to the Ethernet port of motherboard

Can't connect to network even when it is directly plugged in to the Ethernet port of motherboard. No wireless connections so has to be wired. Not sure what is wrong.
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16 views

how to configure jitsi with getonsip?

I want to test jitsi with getonsip, can I do that with freephonebox? Or, what's good echo test service, maybe SIP 5060? I want to establish, a positive test, that I've configured the client ...
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1answer
67 views

How to connect to wifi using Qualcomm Atheros AR9462 Wireless Network Adapter, for an acer v3 772g machine running Ubuntu 14.04 LTS?

I am trying to connect to wifi using Qualcomm Atheros AR9462 Wireless Network Adapter, for an acer v3 772g machine running Ubuntu 14.04 LTS. According to lspci -nn there is this card installed: ...
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1answer
113 views

Command “sudo apt-get update” runs with some error

I am new to Ubuntu. I am facing some problem running the sudo apt-get update command. It shows the below mentioned error. My system configuration: Ubuntu 12.04 LTS 32 bit Command: sudo apt-get ...
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16 views

How to create hostspot with Centrino Advanced-N 6200 wireless device?

I'm using Ap-hotspot script. but when I enter sudo ./ap-hotspot configure It say: Your wireless card or driver does not support Access Point mode Is there any way to change the device driver ...
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1answer
59 views

Slow and unstable wireless connection on RTL8723AE on Ubuntu14.04

I've been having some problems with the wi-fi connection on Ubuntu 14.04. I have a Toshiba Satelite with pre-installed Windows 8 which I un-installed. The wi-fi connection on Windows was really good, ...
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36 views

how to check whether wireless driver is installed or installed normally in my ubuntu system?

my wireless network is not working properly in my ubuntu system. I want to know whether wireless driver is installed or installed normally in my ubuntu system? what are steps to identify wireless ...
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17 views

Problems port forwarding apache?

I recently made an Ubuntu server running the latest version. I installed lamp, I assigned a static IP address to it and I can access it within my home network. My problem is when I try to forward it, ...
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1answer
66 views

Prevent Skype resolvers getting your IP on Ubuntu

I am running Skype version 4.3.0.37 on Ubuntu 14.10, and I know that on the Windows version there is an option to only allow direct connections to your machine through Skype for Skype contacts, which ...
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1answer
69 views

Cant access apache webserver outside/inside local network

I apologize in advance if I use any technical words in the wrong way. I'm still a newbie to Linux/networking Ive been trying to figure out this problem for over a week and none of the related ...
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1answer
35 views

Apache2 Virtual Hosting ServerName in Ubuntu Server 14.04 in LAN not Working

i am very new to Ubuntu Apache2 World. I have a Apache2 in my Ubuntu Server (14.04) in my home installed. I tried to visit this Apache Server in my LAN environment. (Server IP is static: ...
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1answer
62 views

Connect to internet on Ubuntu 14.10

I recently downloaded Ubuntu 14.10 on my HP Pavilion. I try to connect to internet by wired connection but Ubuntu doesn’t recognize the Ethernet card. When I follow the instructions at: ...
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69 views

Wifi connection unstable

My laptop is with ubuntu and windows. when I use windows, the wifi connection is fine. but when I use wifi. the connection is not stable. Sometimes, it often disconnect to the wifi. Sometimes, even if ...
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1answer
30 views

nm-applet gives errors

nm-applet always gives me a hard time when connecting to wireless. I often have to restart it and make several attempts till it connects to a network. This time I ran it from CLI and I got this: ** ...
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40 views

Recognize ethernet adapter on Ubuntu 14.10

I try to connect to internet on my Laptop HP Pavilion using Ubuntu 14.10, but there is a problem that Ubuntu doesn't recognize the wired connection or the Ethernet adapter: When I type ifconfig, it ...
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40 views

Wifi barely functional with Ubuntu Studio 14.04 and RTL8188EE

There are numerous reports of Realtek wifi cards misbehaving on Ubuntu. Over the span of about two years, with various updates my HP ENVY's wifi has alternated between perfect, intermittent, and ...
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1answer
33 views

wlan1 interface disappeared from ifconfig

I was trying to make a virtual interface on my wlan1 card (like set hostednetwork from windows) by editing /etc/network/interfaces: auto wlan1:0 iface wlan1:0 inet static address 192.168.4.1 netmask ...
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42 views

browser unable to resolve host

I want to visit some websites, but I always get "unable to visit", unable to resolve the host. I tried ping, and I get: esolve@mypad:~$ ping http://www.santaihu.com/ ping: unknown host ...
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1answer
22 views

Follow the path of an incomming packet

I want to find out why some of my routing rules are not working and where my packet takes a "wrong" turn. Is it possible to listen to a Port ( 22 in my case ) and then follow an incomming packet ? ...
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1answer
48 views

Can Connect to OpenVPN but no internet access

I have set up an openvpn server, generated a certificate and downloaded it to my client machine. After importing the client.ovpn file in the network manager, I can still ssh into the server itself, ...
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1answer
47 views

Can no longer access Ubuntu Server 14.10 remotely after upgrade/reboot

I rebooted my Ubuntu server this morning (as updates needed a reboot) and now I can't reach it. Here's what I determined: It was running fine before the reboot! I can't ping the server from another ...
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1answer
15 views

Zabbix-agent shows in netstat even when not installed

I am looking trough my ESTABLISHED netstat connections and what seems not right is zabbix-agent running without being installed. One of my lines on $ sudo netstat | grep ESTABLISHED is the following: ...
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51 views

Setting no proxy, proxy and Authenticating network from terminal [duplicate]

Somehow I can not access my desktop and have access to command-line. I can ONLY see wallpaper after login (no icons), I think I messed up with lightdm. Other posts suggests that I can reconfigure it ...
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1answer
45 views

Internet Connects, but only works sporadically

I've installed Ubuntu 14.04 LTS on my HP Chromebook 14. Unfortunately, I've been having some networking problems. When I connect to the Internet, one of two things happen. Occasionally, the Internet ...