Managing and using network connectivity on a Ubuntu system

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slow boot time on two static IPs

I was wondering why I have such a slow boot time when I have two static IPs set in the /etc/networ/interfaces file? auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.8.10.8 ...
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Bonding TUN interfaces

I am trying to do VPN tunnels bonding as explained by Simon Mott - VPN bonding. But after doing the steps, and when I tried to start the bonding I got the same error message as in ...
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1answer
11 views

How to configure external IP in guest machine

How to configure an external IP into a guest machine. The host has eth0 (LAN) and eth1 (external IP). The guest machine should have a LAN ip and the external IP. The host should only have a LAN ip. ...
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Strange behaviour with multiple ip adresses on trusty

I discover a strange behaviour on a server running Ubuntu 14.04 with multiple ip adresses: All outgoing traffic does not use the primary ip address but an application ip address. We configure the ...
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What's the correct way to propagate an IP address change to DNS server on a LAN?

When I change my eth0 network interface configuration between static and DHCP. The interface settings are updated nicely, but there seems to be a problem updating the DNS. Before changing, I can ...
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14 views

Unable to connect to mobile broadband

I try to connect my laptop with Internet by using modem but I received message said "unable to locate the program" How can I fix that?
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Unable to access internet through D-link N300 router

I have Windows and Ubuntu installed on my desktop computer and I use a D-link N300 router for my home. The connection setup for router is working fine within Windows, but I am unable to connect into ...
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15 views

How do I get Network Manager to recognize rfkill state changes caused by wireless hot key?

I've got a Lenovo ThinkPad Edge E520 laptop (model 1143-3BU) running a fresh installation of Linux Mint 17 Cinnamon (based on Ubuntu 14.04) and have been unable to find a way to make the wireless hot ...
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9 views

My eth1 (TF-3200) have an unknown speed and can't connect to the internet

I installed this secondary network adapter which is the TF-3200 and ubuntu recognize it already. My problem with this is that it can't connect to the internet and when I check the connection ...
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18 views

wifi connection fails - error message says password is wrong but it isn't

after having received a new router from my provider I cannot connect my Dell XPS M1330 with Ubuntu 14.04 LTS any more The network is WPA2 encrypted. I use Wicd Network manager and constantly get the ...
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Can't activate my phisical wireless

In my laptop I have windows and Ubuntu, in windows the wireless works perfectly but ubuntu seems to think that I have my phisical wireless disabled, (I mean the wireless of the laptop) and wen I go to ...
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18 views

Wired Network PPPOE not working

I have created PPPOE connection in ubuntu and now my network manager is not showing edit and delete connection as well as all other network manager options are unclickable i am new to ubuntu so ...
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How to make Android share Ubuntu's proxy?

I had make my android mobile connect to ubuntu using reverse tethering mode according to this link forum.xda-developers.com/showthread.php?t=2287494. below is my script, and works well. ▶ cat ...
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How can I install iBall Airway 3G Usb modem in Ubuntu 14.04?

I have bought iball Airway 3G USB modem. I can't configure it on Ubuntu 14.04.
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16 views

WiFi not working after suspend. Have tried fix

Every time after my laptop is suspended (either from closing the lid or manually suspending), WiFi is disabled and clicking on the network indicator says that networking is disabled. The only way to ...
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24 views

apache2.conf tunning help

I set my server to a public IP. When I attempt to connect to it or load a webpage I will occasionally get timed out. I was told to look into the worker threads and script execution location. ...
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1answer
26 views

Workarounds to a lossy network

I have a lossy internet(12% package lost) at home,which leads a extremely slow speed for TCP connections between one of my fully controlled(root access) server and my computer. Is there any ...
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17 views

Help solve the problem with iptables

1) Application virtualbox Allow outbound TCP to HTTPS (port 443) Allow outgoing TCP on POPS3 (port 995) Allow outgoing TCP on SSH (port 22) Allow outgoing TCP port 9001 Deny everything else. 2) Give ...
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Wireless indicator disappeared on Ubuntu 14.04 and can not connect to new wifi

Strangely, wireless indicator has been disappeared. In addition, When I open the network manager, I can not connect to new wifi, so, I am only able to connect to previous connected wifis. Any Help to ...
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How to change pptp vpn remote password 12.04

I'm looking for a way to change my pptp VPN connection password on the remote server, is there any way to do this? I know that from windows if the password expires the connection automatically prompt ...
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13 views

Keyboard pass-through from one Ubuntu PC to another?

I have two PCs running Ubuntu. Both are on a common LAN and I can even connect them directly to each other with an ethernet cable. Now, it just so happens that I hate the chiclet keyboard on the ...
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Network adapter dissapears after using ubuntu

im starting using linux and I installed Ubuntu 12.10 in my pc with windows 7. The problem is when I use ubuntu, the network card works normally but when i turn off the pc and/or restart and boot on ...
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Trying to use Lubuntu as a simple server in a Windows-8 network

I have a couple of Windows-8 machines and a Win-7, and I'd like to use a small ASUS-eee running Lubuntu 14.04 as a simple fileserver for limited data that I usually need on one PC or the other. I have ...
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How to temporarely resolve a name to a localhost port?

I develop websites with rails, and I was looking for a simple way to setup a dynamic name resolution for my app. The final product I need is to is: Everytime I start a rails application (by typing ...
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VPN Private Tunnel problem. “Connection timed out”

I bought 100GB of Private Tunnel storage few days ago. Private Tunnel works perfect at windows and it works perfect on my phone. Problem is, i followed the guide ...
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Virtualbox VPN settings

I can connect to a VPN using NetworkManager, but I can't do it from Windows XP running as a guest OS. Unfortunately, the VPN is only to access local servers in my organization, and it isn't ...
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1answer
10 views

Restart ntlmaps without logging out?

I installed ntlmaps from the package repositories. Since then it starts automatically when I login. Now I had to make a setting change. The problem is that I cannot turn off the computer or logout ...
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Cannot connect to ubuntu samba server via mac OSX “connect to server”

I have Ubuntu desktop server and MacAir with updated OSX. openssh-server and samba have been installed in ubuntu desktop. I could connect to ubuntu through OSX terminal using ssh, but samba file ...
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1answer
10 views

Network configuration on boot taking longer than 60 seconds… why?

My HTPC was running Ubuntu 13.04 and had no problems, but I've re-formatted the system and installed Ubuntu 14.04 (minimal) from scratch and I've having a problem with my network. When the system ...
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1answer
14 views

Using arping command in ubuntu 12.04

I am configuring a pgpool instance to get a HA of postgresql services. I am following this configuration. I found a command and I ran it manually in my console: arping_cmd = 'arping -U $_IP_$ -w 1' ...
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1answer
25 views

Setting a Static Ip on Ubuntu

I'm struggling with setting my static ip, nothing seems to work. When I enter my interfaces, it says (by default): # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback ...
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21 views

How to Install USB 3G modem in ubuntu 10.04

I am not able to connect to internet using my Micromax MMX 354G USB 3G Modem in Ubuntu Server 10.04 Do I need a specific driver? Where do I get it and how can I install it?
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Port Forwarding [on hold]

I have a Linux Server CentOS 6.3 that has multiple network cards and 10 IP Public, and 10 NIC is connected to the internal network Now I want the each IP to be forwarded to a client in each network ...
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40 views

link 2 computer over the internet

I have 2 desktop computers and I would like to connect both of these computers together over the internet so I could access the information from one room to another. the computer with the files I ...
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1answer
28 views

I have problem connecting to the internet after upgrading to ubuntu 14.04.1 LTS desktop version

I have problem connecting to the internet after upgrading to ubuntu 14.04.1 LTS desktop version. The system was installed in VirtualBox. It worked well before; after upgrading to 14.04.1 LTS, it ...
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1answer
26 views

How do I set up a firewall/iptables using rc.firewall?

I am new to Ubuntu and am having a bit of trouble getting my firewall set up for my Network Security class. We are set up with 3 virtual machines - a Gateway, a Server, and a Client. We are supposed ...
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Track up and download of UMTS USB Stick

Is there any easy to use application for ubuntu that can monitor the up and download ammount of my USB-UMTS-Internet Stick and has a GUI?
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1answer
46 views

Computer automatically disconnects from wifi: I have to restart to get back online

My Lenovo Ideapad G50-70 will automatically disconnect from the Internet at random moments on 14.04. The network will first just stop working without any warning, and after a while, it will disconnect ...
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23 views

WLAN gets disconnected (deauthenticated from … (Reason: 7))

My Wifi gets disconnected every few minutes (or sometimes hours). This is what I typically see in dmesg output: [ 1303.488008] wlan2: deauthenticated from 84:a8:e4:ed:f1:6e (Reason: 7) [ 1303.557239] ...
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14 views

Ubuntu Server low client dowload speed

In the work we have a Ubuntu server 14.04 working as a proxy server, dhcp and Firewall, we assigns the clients Ips Manually in the dhcp for each Mac Address. The most of the clients go out through ...
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24 views

UFW for OpenVPN

I want to configure ufw (uncomplicated firewall) for OpenVPN. Connections are only allowed through OpenVPN. Everything else should be blocked. So if OpenVPN is disconnected -> no internet! I found ...
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8 views

USB 3.0 port not detecting USB modem

I have HP 250 G2 laptop with Windows 7 and Ubuntu 14.04 (dual-boot). The laptop has USB 2.0 ports and one USB 3.0 port. I am using USB 3G mobile broadband modem (Huawei K4201), which is working ...
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1answer
11 views

Updated some VM's from 12 LTS to 14.04.1 LTS, and now network throughput is bad, any ideas?

I decided to bite the bullet after seeing the messages about going to 14, and ran the upgrade scripts. This all seemed to go well, so I kept going and updated all 3 of my VM's that are running Ubuntu ...
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1answer
10 views

TWC arris cable modem. browse but no port forward

I have am arris cable modem tg1672g62. i'm running ubuntu 12.04 lts Genuine Intel® CPU 585 @ 2.16GHz 32 bit. i connect to firmware by typing 192.168.100.1:8080 in theory it should be 192.168.0.1 i ...
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No 'wlan0' on 14.04.1 LTS [duplicate]

Just installed Ubuntu 14.04.1 LTS 32bit on my "mature" Asus X50R laptop. Basically working fine and I'm using it to write this post, with a wired network. However wireless doesn't work. The ...
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37 views

Share Internet Connection via Ethernet connected Router over the LAN

I have a USB modem that works perfectly with Ubuntu but doesn't work with my Wifi router. I want a set-up where the USB modem is connected to my PC and my PC is connected to my Router (via ethernet) ...
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getting following error messages when updating ubuntu [duplicate]

Err http://security.ubuntu.com quantal-security/main Sources 404 Not Found Err http://security.ubuntu.com quantal-security/restricted Sources 404 Not Found
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1answer
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Ubuntu Server/Network Advice

What I basically want to is make so that any one of my family members can log on at any of our Pc/Laptops and still assess their files. I know kinda of know what to do but not completely. Would this ...
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21 views

How to set up ssh on a lubuntu vm (VirtualBox) and windows host

I've set up a Lubuntu vm using VirtualBox on my Windows 8 desktop and I want to connect my laptop, which is dual-booted with Windows 8 and Ubuntu, to the Lubuntu vm via SSH. I've gotten as far as ...
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Ubuntu 12.04 LTS disconnect from Wifi when another device connect

Novice Ubuntu user here. I have a very strange problem. I have a wireless connection at home. At one time there could be 3 machines that are connected using wireless (Windows 7 laptop, Window XP ...