Managing and using network connectivity on a Ubuntu system

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fail2ban or denyhosts to block invalid username login attempts

Is there a way to automatically block IP address when a user tries to login as any invalid username? I already have: [ssh] enabled = true port = ssh filter = sshd logpath = /var/log/auth.log ...
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1answer
1k views

How to create virtual NIC and associate them with different vlan

I am trying to connect one physical NIC to two different vlans by creating virtual NIC. Since Switch tags a port with only single vlan ID. If I convert the switch port to trunk mode, is there some ...
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0answers
8k views

Ubuntu 12.10 - “the system network services are not compatible with this version”

Fairly new to Ubuntu, know my way around, but novice user. Started my Laptop running Ubuntu 12.10 this morning, and no wireless or Eth. Look at Network Manager and this message: "the system network ...
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3answers
486 views

Strange networking problem. Google does not work

Google does not work, like just Google. This is the weirdest error I have ever seen. Every 20-30 minutes Google stops working in my browser, any other page works. Then in 5-10 minutes, it just comes ...
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2answers
434 views

What is the best way to trigger scripts or actions when the computer is disconnected from the network?

I am running 12.04 LTS. There are a number of shared resources that I use that are housed remotely on a local server. When disconnected from the network (on say a network, or router failure), I would ...
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3answers
1k views

Server at home with static public IP

Hi I have a problem with Ubuntu 12.04 Server. I have checked the IFConfig it seems all the entries are correct except the nameservers do not seem to get resolved. As such when I run ...
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2answers
2k views

can't connect to wireless network on hp mini after installing ubuntu 12.10

i got a used hp mini yesterdayand installed ubuntu 12.10 today. like others, i cannot connect to a wireless network. "enable networking" is checked but no connection options appear. ethernet works. ...
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1answer
1k views

Dell Inspiron 1545 with Ubuntu

I've installed Ubuntu on a Dell Inspiron 1545 and I'm not sure how to connect to my router wirelessly. It's asking for some information that I haven't seen before. In a window titled, Editing ...
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1answer
5k views

get apt-get stop using ipv6

I'm trying to use apt-get update or any other apt-get command it gives me this error: Hiba történt „2001:db8:dbb:1:1:1:1:221:8049” feloldásakor (-9 - A címcsalád a gépnévhez nem ...
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1answer
541 views

How to prevent non-root user from changing IP address and network parameters?

As I wrote in subject - How to prevent non-root user from changing IP address and network parameters? It's on Ubuntu 12.04. I followed instructions on Sitepoint's link ...
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1answer
505 views

not able to browse internet through wifi, but working fine with ethernet card

Hi I think I can get help from this page... I am using ubuntu 12.10, I am able to access internet through lan wire, my laptop is also able to search my home router(wifi) and is also properly ...
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1answer
429 views

High number of ethernet errors. Tool for testing the ethernet card?

I have an Asus Sabertooth X79. I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying the files to tmpfs. If I copy ...
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204 views

Can' t connect to wireless networks on my macbook

I am new to this "Ubuntu" software (just downloaded it). I have Ubuntu 12.10. I am trying to connect to my wireless network. I have tried everything on the "Ubuntu Help" page but still nothing. I'm ...
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2answers
1k views

All ports are closed until they are opened manually by the user? Is it true?

I am new to Linux and Ubuntu. I googled and read some articles stating that all ports are closed until they are opened manually by the user. Is it correct? And what do you mean by "listening on a ...
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2answers
1k views

How to correctly reinstall network-manager

I tried to install connman and it didn't work, so I removed it. Then I tried to sudo apt-get install network-manager network-manager-gnome` and that obviously didn't work so I found the correct ...
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1answer
415 views

network issue in Lenovo B570e on ubuntu

`I am switched from windows to dual boot with ubuntu 6 months ago. And its network card was working fine. One of my colleague having same model who had just installed ubuntu told me that there is some ...
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1answer
233 views

Weird thing about Wifi in Ubuntu

There is WiFi near my house which I use. It's an open WiFi network but it requires login and password once I connect to it by redirecting to login page. Everything is okay because I have them because ...
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1answer
217 views

Network problems with Ubuntu Server 12.10

Hey guys im new to the world of ubuntu from what ive been doing so far there is loads of help and it been grate but now ive hit a problem. I am running Ubuntu Server 12.10, and my connection speed is ...
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1answer
833 views

Where can I find network connection details?

My internet connections works well, but where can i find it's configuration files? I tried to find it here: /etc/network/interfaces /etc/NetworkManager but, there is nothing relevant to my eth0 ...
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1answer
738 views

Why no internet access despite appearing to be connected to wireless network?

I downloaded and burnt Xubuntu 12.10 to a CD and installed. When installation first started it said that I was connected to the internet but at the next step it let me choose my wireless network and ...
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2answers
1k views

How to automate ethtool?

I tried Lubuntu on my desktop beside Windows XP. I really love it except for the following problem: I have a LAN broadband internet connection which flawlessly works in XP, but not in Lubuntu. Each ...
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1answer
3k views

Going to Network path

My computer is connected to a network. Network administrator allows us to open some files, which are saved on server. In windows, I simply open run and type //192.168.2.2 and then it asks me for ...
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1answer
7k views

How to mount a CIFS share so it doesn't warn about external file modifications

This is the current fstab entry for the mount. //qnap/share /data cifs noauto,user,username=qnap,uid=1000,gid=1000 0 0 This works fine and most of the time without any problems. However when ...
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2answers
137 views

Beginner question of lan and ubuntu server

I am very new to network. I don't know what should I do in order to have highest security secure on my home network and internet. I got a router have only one port and I connect it to hub and split ...
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1answer
2k views

how to enable internet with ubuntu 10.04

I have installed UBUNTU 10.04 dual with my windows 8. but the internet is disabled, both the Ethernet and wireless, I try this link but when type this commands sudo apt-get update there are ...
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1answer
211 views

cannot connect to network in ubuntu server 12.10

I had recently installed an ubuntu 12.10 server edition and i am new to this. During the installation I skipped the configure network section, and now i cant connect to any network. I used the lshw ...
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1answer
957 views

How to prevent system freeze on Wifi activation?

Without myself modifing any configuration setting, my system starts to completely freeze after I activate the wifi network via the network manager or at a sudo rfkill unblock all. I would like to ...
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2answers
1k views

How to tell what interface a TCP connection will go out on?

I have a server with multiple ethernet interfaces. What's the easiest way to tell what interface an outgoing TCP connection will go out over? The results of "netstat -rn" is greek to me, so if your ...
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2answers
1k views

Server 12.04 - Secondary IP won't route outside of local network

I am using Ubuntu 12.04 as the platform for a VirtualMin installation which will host multiple websites for the same organization. For this, I need to bind multiple IP addresses in the same subnet to ...
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2answers
10k views

In Ubuntu 12.10 how to enable /proc/net/ip_conntrack?

I've tried sudo modprobe ip_conntrack to no avail. I can't find anything about enabling this. Does anyone know how?
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1answer
326 views

can not find eth0 when first boot machine, it's ok when reboot the system, help!

some commad's results are following: spci -k|grep -i -A2 net 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 06) Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe ...
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0answers
503 views

How to connect Ubuntu to University LAN (Windows, Dynamic IPs) to use Internet

I have recently switched from Windows to Ubuntu so I don't know much about it. The issue is that I am unable to connect my Ubuntu laptop with the computer laboratory of my university via LAN cable so ...
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3answers
16k views

How to stop NetworkManager?

Is there any way to stop NetworkManager applet and switch to manual configuration of /etc/network/interfaces?
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688 views

Can't start ethernet network connection

After electric surge grub loader has stoped working which i fixed with 'grub-install', but now i can't make ethernet working again. Bootable version of Ubuntu doesn't working too. What is the ...
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1answer
483 views

rosewill wireless pci card not working

Relevant specs Rosewill RNX-N250PC2 pci wireless adapter Biostar A780L3c motherboard Ubuntu 12.10 On first install on 12.10, wireless card worked perfect out of the box. However, after updating ...
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2answers
1k views

Why doesn't Ubuntu automatically disable wireless networking when a wired connection is active?

When I have Wireless enabled and plug in my Ethernet cable, the wireless connection stays active, even when the wireless and wired connections are through the same network. I'm aware of this question ...
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0answers
23 views

Wireless not working on Dell XPS M1530 [duplicate]

I have just installed Ubuntu on my Dell XPS M1530. The installation worked fine, but I can't find any available routers. I have made sure that the wifi switch on the side of the computer is on, I have ...
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1answer
979 views

Ubuntu 12.10 WIFI card not activated

I have a Dell XPS-15 on Ubuntu 12.10 with a wifi card Intel Centrino Advanced-N 6235. I don't know why but I don't have access to wifi anymore, my card is detected but I can't activate it. Here is ...
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1answer
1k views

How to allow PPTP VPN access through APF firewall

I'm attempting to connect to a PPTP VPN. I have opened ports 47 and 1723 in the ingress rules. When APF is turned on, it fails. When APF is turned off, it works fine. I have turned on as many logging ...
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1answer
405 views

Want some advanced configuration with ufw

I've read the ubuntu developer docs regarding the ufw here, but couldn't find what I was looking for. It allows me to set rules for controlling in/out traffic based on source IP or port numbers, but ...
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1answer
402 views

blocking mac address query

I tried to use the following command from iw tools: dev <devname> station set <MAC address> plink_action <open|block> like this : iw dev wlan0 station set 30:14:4a:3e:f0:98 ...
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2answers
6k views

Access Windows machines from Ubuntu on local network by hostname

[I've searched a LOT for a solution to this issue, but if someone wants to point me to a related question and/or answer, please do!] I have a local network over a broadband router with 3 Windows 7 ...
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1answer
3k views

How can I configure wired network connection on 64-bit Ubuntu 12.04 LTS?

I've just installed my first linux installation on a donated computer that I plan to network and use it as a shared storage drive for all of our pictures and videos. We have a DSL modem with both ...
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1answer
64 views

how to network in ubuntu client on windows host?

I have Ubuntu 12.10 installed on my windows7 on Vbox. Is it possible to access disks and folders from the windows host like system C drive or D drive? Or maybe networking between both machines to ...
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1answer
51 views

Apache Error 98

Whenever I boot up Apache, this error occurs: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down I've dug around the forums, ...
12
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1answer
27k views

what does mean dns-seach option in /etc/network/interfaces

can anybody describe me about dns-search directive in /etc/network/interfaces file: iface eth0 inet static address 192.168.3.3 netmask 255.255.255.0 gateway 192.168.3.1 dns-search ...
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1answer
354 views

Bluetooth DUN Connect with the command line?

I use my mobile (Samsung Corby GT-S3653) to connect to the internet and my mobile network gets automatically disconnected periodically when I'm using it for GPRS so I always have to click that ...
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1answer
296 views

wired network not working DELL 17R SE

Wired Network not working; it shows connected to network but I get no Internet access..! System DELL 17R SE Output of lspci -nnk | grep -iEA3 "(network|ethernet|wireless|broadcom)" lspci -nnk | grep ...
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How do I connect a Windows XP Pro and Ubuntu 12.04 together over the network

How do I connect a Windows XP Pro and Ubuntu 12.04 together over the network. I used the networking wizard in Windows to create a networking setup. I am not sure I did it right, so maybe someone can ...
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1answer
65 views

Wired Connection issue

I have recently installed Ubuntu 12.10 on my Lenovo G580 series had an issue with the ethernet this was solved after installing Atheros network driver. The laptop was working fine and able to do ...