Managing and using network connectivity on a Ubuntu system

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How to cleanup old wireless networks from the dropdown list

Once when there was a very boring lecture at Uni, 300 students started making random networks. For some reason some of them stayed and are still there. I have never connected to them, and they are not ...
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Ubuntu Mysql Server and Netbense Java Project Connectio Error

@ I Installed Ubuntu Server 14.04.3 LTS (using VMwear Workstation).... Static ip details() address 192.168.137.xxx broadcast 255.255.255.0 network 192.168.137.0 ...
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Cannot connect to or search for WiFi in fresh Xubuntu 14.04 install

I've been using Ubuntu for a year or so now. I've installed a few different flavors on a few different laptops around the house. On a new Acer laptop, however I have had no luck getting wifi to work. ...
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Poor performance from Network adapter with wireless connections?

I'm facing performance issues with my wireless network adapter (or drivers, I'm not sure) on Ubuntu 15.04 and now recently, on my elementaryOS Freya installation. The same works fine when I log into ...
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JBL ON BEAT A WAKE PROBLEM [on hold]

Hey I have a problem with my JBL ON BEAT A WAKE it's showing me on the screen "UP 9" and i cannot use it. Thank You
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7 views

Ubuntu script help with BASH and OPENVPN

I was wondering, how do I run a command when my OPENVPN bash script has connected successfully to a network? I know about the: "command;nextcommand" thing do I do something like this so it runs a new ...
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i am unable to run ubuntu webserver online with private ip address provided by virtual box

i have installed the ubuntu server in virtualbox and virtual box network settings are in NAT .for that virtualbox is providing the private ip address for server to work online but iam unable to ...
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Not able to access some websites after updating Ubuntu 14.10 to 15.04?

I just updated my Ubuntu from 14.10 to 15.04. After that I am not able to open some websites,for example Flipkart.com, Naukri.com etc. All these sites I am able to open in Mobile by connecting to ...
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Ethernet connection kept trying to connect but failing, more issues ensued

Alrighty. I'm brand new to Ubuntu and Linux, so bear with me here. I just installed Ubuntu 14.04 today, as I've been interested in linux and want to get into it, but I'm having a serious issue ...
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9 views

Nmap Error when using the “–script” arg

i just installed the nmap network scanner, and when i try to use it whith the "-script" parameter, it doesn't work: example: soufiane@soufiane-cvc:/usr/local$ nmap -p143,993 -Pn –script ...
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What are the directories and files that I should keep in sync for a cluster server

I am currently wanting to set up new clusters. Each cluster is defined by its software installed, software settings, and its home folder files. I want only the above to be cloned and not things ...
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Ip Forwarding between wlan0 <=> eth0: works in Terminal, fail in Browser?

I enabled ip-forwarding between my interfaces wlan0 and eth0 : in /etc/sysctl.conf sh "echo 1 > proc/etc..." 3 iptables rules. IpTables rules: sudo iptables -t nat -A POSTROUTING -o eth0 ...
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How to connect to WAP on xubuntu 15.04

Problem: Laptop does not connect to wireless access point. My Lenovo tablet shows network KPP1 (28:10:7b:62:76:4e), -68 dBm on channel 6. I get a 12 Mb/s download, 2.3 upload speed. On my xubuntu ...
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2answers
31 views

How can I cut the mac address out of DHCPDUMP?

I am trying to use dhcpdump to recognize people logging onto my home network and give them a tailor made greeting using a credential file. I cannot get the mac address out of the results of dhcpdump. ...
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How to mount a dynamic share (NFS) from a script by a non root user

I need to mount a network shared folder (with rw access) from within a script on a headless ubuntu server. The script will receive the ip address for the share as an argument. The script will be run ...
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26 views

ufw won't allow connections to port 5432

I've installed Postgresql 9.4 on Ubuntu Trusty from the PGDG ppa. I've created a database and set it listen-address to '*'. I've made an entry in the pg_hba.conf file. I can connect locally with no ...
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iptables set-mark doesn't work

My machine has two network interfaces, one is wired (eth0) and the other one is wireless (wlan0). The wired one cannot connect to any external NTP server because there is a firewall outside. The ...
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11 views

Active Directory Domain Controller Not Appearing in Network Folder

I'm having issues with my Active Directory domain controller, where my server does not show up on Network or My Network Places. I am running Samba 4.1.6-Ubuntu on Ubuntu Server 14.04.3. This issue ...
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Wireless on Ubuntu 14.04 not working all the time

This is my wireless driver: product: BCM4313 802.11bgn Wireless Network Adapter vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:02:00.0 version: 01 width: 64 bits clock: 33MHz ...
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9 views

Iwconfig set bitrate impossible

I've got a problem with iwconfig. Prelude: I had a slow wifi connection, after some research I found that can be caused by a bad bitrate configuration. I launch iwconfig and Bingo ! : eth0 no ...
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19 views

Failed to connect Internet

I'm currently using Ubuntu 15.04, my computer is a Sony Vaio 32 bits, AMD E-450 APU. Suddenly, with no previous problems before this, I tried to connect Internet and out comes this: Failed to ...
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IPForward fail with wlan0 AP + eth0 WWW

I did it: wlan0: Wifi AP (Dhcp) eth0: Internet access I can verify the WWW is joinable by eth0. Clients can connect to Wlan0 AP. It works well if I redirect all traffic to localhost with ...
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How do I debug a large pause before network transactions when Network Manager is disabled?

I have had a network problem since upgrading to 15.04 for which I have tried a new network card and clean installation of ubuntu, neither of which worked. My system was fine under 12.04 and 14.04. If ...
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3answers
26 views

Block connections to open WiFi networks

My users are using Ubuntu on corporate laptops. They don't have sudo permissions. IT security policy deny connections to open WiFi networks. How to setup Network Manager to deny connections to that ...
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Dual Boot Win 7 and Ubuntu and can not get wired connection to work

Recently I decided to try out Linux and chose Ubuntu. After backing up all my files I went ahead and installed Ubuntu 15.04. I did this in a partition as a dual boot knowing my family would still want ...
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Failed to add/activate connection. (32) Insufficient privileges

I am doing a fresh install of a minimal Ubuntu system with MATE desktop environment. When I click on NetworkManager's icon and then a wireless network to connect to, I receive a dialog box that says: ...
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Setting IP routes using script

My Setup In this setup, the server can see the routers but not see each other causing the clients to not be visible to each other as well. The VPN is set up using PPTP and the routers have DD-WRT ...
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Waiting for network configuration (on boot-up)

I've noticed lately on my new 14.04 Server that I get the following on boot-up: Waiting for network configuration followed by: Waiting up to 60 more seconds for network configuration and ...
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7 views

Linksys Wireless-G USB Network Adapter WUSB54G ver 4 Can't Connect to WiFi

I'm a newbie to Xubuntu and am having trouble with getting my usb adapter to work properly. If anyone tell me how to do it step by step it would be greatly appreciated. I'm currently typing this ...
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18 views

WIFI fails after connecting

After connecting to the WIFI, my connection fails (this is normally after 15-30 minutes). I then go to network manager and find all the WIFI points have disappeared. The only way to connect up again ...
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15 views

BCM43228 not working after reboot

I am posting this thread after trying the solutions already provided in the forum but it does not work for me. Installed ubuntu 14.04 LTS version on Dell Latitude E6420 with a broadcom wifi devicie ...
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WiFi Has Stopped Working on MacBook Pro 7,1 with Unbuntu 14.04

Okay, so I'm very confused about what is going on with my computer. Below is my initial query, followed by an update to the situation. Initial Query I have recently removed OS X on my MacBook Pro ...
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Network Drives Not Mounting on boot untill ufw is disabled/enabled

I am relatively new to Linux but I am enjoying it and even more enjoying learning it. Here is what I set out to accomplish. I have an Windows media box (running win7) that i want to connect the shares ...
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Ubuntu 14.04 showing port 80 as filtered

I am having a problem connecting my ubuntu 14.04 machine to the Internet. The machine was working fine and suddenly stopped working. I can ssh into the machine using ssh gateway but I can't ping the ...
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Realtek rtl8723be.conf file doesn't exist | wireless not working | HP probook 455 G2

I have 15.04 Ubuntu MATE build and i cant get my wireless to work. I've tried everything , installing rtlwifi_new drivers, this is also happening with MINT and 15.10 beta 1 release. I tried it with ...
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Wifi problem rtl8723be card

I installed Ubuntu 14.04 in a laptop with a rtl8723be card and I can't get an stable wireless connection. After 2 or 3 min my wifi disconnect and I have to reboot. I have tried this solution: echo ...
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19 views

How to perform NAT to DDNS provided ip address using iptables

I have a device connected to the internet via a 3G Cellular link. I can't get a valid static IP address for my connection due to the network operator rules. On the server side, the application which ...
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2answers
31 views

Problem with wireless 14.04 (RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller)

I just installed Ubuntu 14.04, and am h aving trouble getting my wireless working. I've run Ubuntu desktops before, but I just can't get it working, and I'm not sure what to do. This is the output of ...
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ubuntu 14.04 not enable wifi (wireless type : RTL8723AE)

sts@sts:~$ sudo lshw -C network *-network DISABLED description: Wireless interface product: RTL8723AE PCIe Wireless Network Adapter vendor: Realtek Semiconductor Co., Ltd. ...
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I want to use ipv6 but when it's on the adapter sends deauth packets… what's going on?

The internet works fine when I don't enable ipv6, but when it's on I get deauthentication packets in dmesg outputs: root@grepsly:/home/isme# dmesg -T |grep deauth [Mon Aug 31 23:18:24 2015] wlan0: ...
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1answer
29 views

Wireless network disabled

i have a hp pavillion laptop. i have installed ubuntu 15.04. for the first time ubuntu has problem detecting wireless network. i am posting data here. if anyone could help me out it would be of great ...
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Unable to Boot OS of Cloned VM

Using VMware version 5.5.0, I cloned a virtual machine running Ubuntu 14.04 LTS (GNU/Linux 3.13.0-24-generic x86_64). Prior to powering on the cloned machine, I disconnected it from network adapters. ...
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2answers
33 views

how to obtain ipv4 address of ubuntu server running in virtual box along with ipv6?

i have installed ubuntu server on virtual box. When i execute the "ifconfig" command it shows the info of eth0 and loopback with inet6 address .but i want ipv4 address instead of ipv6 and i am not ...
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Inconsistent Wifi on Ubuntu 14.04 fixes work for a day then never work again

So for the past week I've been having an issue where Linux is saying my wifi is disabled via hardware switch. The only problem is that my laptop has no hardware switch for the wifi but it has a ...
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1answer
15 views

Moving a file from machine1 folder1 to machine1 folder2 using machine2

I hope I can explain my question clearly, bare with me. I have a machine I use as server (transmissiondeamon, plex, fileserver, that kind of stuff) This machine is headless so if I need to move a ...
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1answer
33 views

No internet connection over cable (but wifi works) [on hold]

I have Ubuntu Desktop 14.04 installed on MSI GT660. I am Linux newb. I can connect to internet using wifi but not over cable. contents of /etc/network/interfaces: # interfaces(5) file used by ...
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Facing issues with Realtek RTL8723BE wireless adapter

I am facing issue with realtek RTL8723BE wireless adapter. Very poor reception and for a very short range. I tried installing the new driver from the github How to install Realtek RTL8723BE wifi ...
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1answer
34 views

VPN slows down whole internet connection

I used to connect to a home server through a private VPN and I used it just to access phpMyAdmin and the MySQL database (from my application). When connected to the VPN, my internet speed was not ...
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1answer
49 views

How to make static IP address dynamic in /etc/network/interfaces

I need to set the IP address of a ubuntu device() to be read from an EEPROM. The user has he option to change the IP address as well. I know the commands to read and write to the EEPROM. But how ...
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1answer
31 views

Why my Ubuntu block wlan & how to unblock?

Everytime I boot Ubuntu, my wifi lan is Soft-blocked. ( I did rfkill list, rfkill unblock wlan to verify the case. In addition I note that it is blocked some seconds after boot is finished). how can ...