A computer network allows sharing of resources and information among interconnected devices.

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Debian 6 VM server - network connectivity problem

I'm having a problem with a Debian 6 VM server where it looses network connectivity and doesn't come back (server does not respond to pings, and can't connect to any services). This is a wired network ...
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1answer
67 views

how to check if the kernel support for ip alias?

it surprisingly that I get no explicit results when I googled "kernel ip alias support", and I have looked up the linux network administrator, 3rd edition, it says: check that you have a ...
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209 views

Unable to reconnect to a WiFi network on Fedora 20?

Problem After leaving my Fedora 20 laptop running overnight, I open it back up and it prompts me to re-enter the password for my home WiFi network. The password is already typed in and censored, but ...
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1answer
45 views

host only ip address: can it be 10.*.*.*?

My router is set to have computers IP range from 10.1.1.1 to 10.1.1.60 I'm trying to run Linux in virtual box in a host computer with windows 7. The host computer has 10.1.1.5 currently, which is ...
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23 views

invisible bridged router with 2 route table

my setup I have 2 ISP connexion : ADSL and SDSL. A qos (named qos, ip : 192.9.201.252) server stands before the ADSL router. It is the only way to access the ADSL gateway (192.9.201.254) through a ...
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0answers
134 views

Broadcom or Modem wireless connection problem

I have a BMC42142 wireless adaptor lspci -vnn | grep 14e4: 02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01) and I can't connect to wireless lan. ...
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1answer
53 views

Can't run boinc on fedora

I'm trying to install boinc to fedora 17 from packages. Everything is fine, client starts properly, I added port 31416 to firewall exception. However cannot add any project or execute any command on ...
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208 views

Backtrack R3 can't find wlan

I have installed Backtrack R3 in virtualbox, but i cant find any wireless connections. Cant find anything in wicd either. What i want to do is to run airmon-ng start wlan0 in terminal, and after that ...
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40 views

setting up a local VoIP to use as a Wifi Headset

I had this idea of using Wi-fi in a vehicle to connect my cell to the car call handler.Just as it works with bluetooth nowadays. Just to demonstrate that such a thing is possible , i had three Linux ...
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387 views

Use iptable do redirect all the HTTP traffic to localhost

I use a Linux machine as WLAN Router with the help of hostapd and udhcpd. There's also an Apache web server installed on the same machine. Now I want to redirect all the traffic which comes through ...
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2answers
116 views

How to set up server networking on Debian?

I'm helping a friend to set up a media server for his new house. I've installed Debian 7.2.0 and I'm trying to get the network up and running. The physical set-up is like this: Other ...
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1answer
107 views

check internet speed from terminal? [duplicate]

How can I get the speed of my internet connection from the terminal? Is there any script or commandline application(s) available? I'm using CentOS 6.5 .
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2answers
116 views

GRE supported in kernel but iproute2 cant create GRE tunnel

Im trying to create IP over GRE tunnel but i get No such device: ip tunnel add gre0 mode gre remote 192.168.152.22 local 192.168.152.21 ttl 255 ioctl: No such device I have compiled GRE support in ...
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1answer
577 views

Linux Mint 15 : how to share wifi connection with other devices connected to Ethernet port?

My laptop connects to our apartment network via Wifi. I'd like to share this connection using the laptop's Ethernet port, i.e. be able to plug another system into Ethernet and have it also use the ...
2
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1answer
47 views

Force IPv6 only through Miredo

I have an Ubuntu PC with Miredo's implementation of the Teredo protocol. I want to temporarily make it so that I can access IPv6-only addresses with all IPv4 networking available solely for Miredo to ...
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0answers
66 views

Command for finding open ports

On my linux servers I have this alias set: alias ns="sudo lsof -Pi|grep -v ESTABL|grep -v CLOSED|grep -v -e '->' | tr -s ' ' '\t' | awk '{print $3 "\t" $8 "\t" $5 "\t" $9 "\t" $1}'| column ...
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0answers
153 views

Route outgoing traffic to different gateway based on port

I am trying to get around my Usenet download bandwidth restrictions based on IP. I currently have two IPs from my ISP to double the download speed. So far I have it working and getting double speed ...
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52 views

SNAT / Masquerade with shorewall

I've got a little question about Masquerading and SNAT in combination with shorwall and KVM. The Operating System is Scientific Linux 6.4. Setup is like this at my root server: Virtual Machine IP ...
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1answer
104 views

How to automate route commands

For some reason everytime I connect to my VM I have to manually launch these two commands for it to connect to the Internet. route add 198.245.49.254 dev eth0 route add default gw 198.245.49.254 Is ...
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1answer
114 views

What network interface does Linux route traffic through by default? [closed]

I have a VPS with 4 IP addresses. I am changing the IP address of eth0 on daily basis. eht0:1 has its own IP address. eth0 (192.168.1.3, 192.168.1.4, 192.168.1.5) eth0:1 (192.168.2.1) I have my ...
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0answers
75 views

Debian access point is detected, but provides no Internet access

I am use Debian sid. I want to share my network (ppp0) via AP (Access Point) to my mobile device. This is my configuration. /etc/hostapd/hostapd.conf : # WiFi Hotspot interface=wlan0 driver=nl80211 ...
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0answers
195 views

How to redirect/forward between a tun/tap device and a socket using linux tools?

I have a socks5 proxy that is bind to eth0. It opens two ports, Port1 is used to connect to remote (for example a http server), Port2 is to listen for clients to connect. Then I created a tun device. ...
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4answers
149 views

How to show network adapters with their statistics?

Is there any terminal command I can use to display all the network adapters like eth0, wlanoand their data statistics like data transmitted & received?
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28 views

Support for old network cards in lightweight distros?

I'm planning to revive and old desk pc, but it is hard for me to choose a distro. My problem is to find a distro that has a good support for old hardware, especially of network cards for wireless ...
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1answer
168 views

Send a packet over the network even when its target is the local host

Under Linux if you send a packet to the address of one of its network interfaces, this packet is routed internally, it is never sent over the network. That's the right thing in 99.99% of the cases. ...
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1answer
323 views

Wi-Fi with WEP from command line in Ubuntu 12.04, Kernel 3.8.0-29-generic

I have removed network-manager and am trying to configure Wi-Fi with WEP manually. I am running on an X1 Carbon. Here are the commands I am running: ifconfig wlan0 down iwconfig wlan0 essid ...
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2answers
121 views

Wifi works in local, no internet connection. Debain 7

I installed debain on an old PC, the KDE version. I have internet over wired. I can connect to my router, I and can ping it over wifi - ping 192.168.1.1 is successful. I can ssh into other machines, ...
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78 views

Access devices on a shared internet connection from other devices on home network (Ubuntu, shared wireless to ethernet)

Laptop OS: XUbuntu 12.04 Home PC: XUbuntu 12.04 guest on Windows 7 host Embedded Things: Mix of Raspberry Pis or Beaglebones I'm trying to share the wireless connection on a laptop with multiple ...
4
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1answer
73 views

Does traffic addressed to one of a Linux system's own interfaces ever leave the system?

I have two separate servers running on the same port on a Linux system, one binded to the loopback interface, and the other to the public Ethernet interface. If I connect a client on that system to ...
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1answer
47 views

How to block all the network traffic from my running user [duplicate]

How to block all the network traffic from one user? But other users are alive to the network that the blocked user is able to connect to other users who have the permission to the internet.
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Kernel panic on “apt-get upgrade” with DWA-160

I'm running on a minimal Ubuntu server 12.04.3 install and I installed a d-link DWA-160 usb wifi adapter as per the instructions shown in this page. After successfully connecting using these ...
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3answers
136 views

Can I set my Debian box to use OpenDNS nameservers if it uses DHCP?

I have a Debian box with this in /etc/network/interfaces: auto eth0 allow-hotplug eth0 iface eth0 inet dhcp auto wlan0 iface wlan0 inet dhcp wpa-ssid NetworkName wpa-psk NetworkPass and ...
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1answer
77 views

How to recognize hostname on the port number 8080 in Ubuntu machine?

I have a very basic question here. This thing is puzzling me a little bit. I have two machines, one is my local desktop running Windows and I have cygwin installed in it and second machine I have is ...
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2answers
174 views

How to Provide login delay in ssh

I wanted to provide login delay while login through ssh .I tried couple of ways of doing same but couldn't find desired result. I tried steps provided by given link. ...
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1answer
100 views

What tool to use to monitor network issues? [closed]

I need a network analysis tool that can help me to find if there are some issues regarding: packet transmission sessions any other stuff is welcome. I'm connected to the appliance I need to check ...
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2answers
112 views

/dev/disk/ lists disks, why /dev/net/ doesn't list network interfaces? [duplicate]

I know that udev manages devices in /dev and I expected to find information about available network cards (hardware) or at least network interfaces (software) there. ifconfig output shows me eth0 and ...
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0answers
30 views

Trouble with adding routes to different subnets

I'm having some confusion with adding routes to different subnets. Here's the layout: I have a vpn connection on tap0 which connects me to 192.168.14.110 That connection, on the other end is routed ...
3
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1answer
59 views

Using shell script to select static IPv4 configuration according to router address

I have Linux Mint 15, I live in a university where the hostel and lab have separate static IP settings. Is there a way to set up the connection mechanism so that my laptop will automatically select ...
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0answers
54 views

mongodb “hijacking” port

I'm having some trouble with Python HTTP Server and MongoDB. In this case HTTP server represents a REST service providing data from MongoDB. MongoDB is running on default port (27017) at all times. ...
3
votes
1answer
39 views

nc both fails and succeeds

Platform: RHEL 5.10 netcat Version: 1.84-10.fc6 I was trying to figure out if my inability to ssh was TCP-level and usually I use nc for this. This time, however, I got something unexpected. ...
2
votes
1answer
762 views

mount to nfs server failed, system error: no route to host [closed]

I have fedora based linux machines in a closed network. In one of the lab machines, I am getting the below error. Mount to NFS server failed. System error: No route to host I restarted the nfs, ...
4
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2answers
95 views

How is the host file actually used in unix/linux networking?

I see on wikipedia that a host file maps IP addresses to human-readable hostnames, much like a DNS server. But does a local computer need to resolve IP addresses? Is the idea that you configure the ...
3
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2answers
300 views

How to redirect http requests to local Apache server on internet connection lost?

I have a little Linux (Ubuntu based) server with 2 network cards, which acts as a router, dhcp, dns server, firewall, etc. One network card is connected to the LAN, while the other is connected to my ...
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2answers
155 views

How to detect network connection failure?

I have a direct Ethernet connection between a Windows box and a Linux box. If I disable the connection on the Windows side Linux still seems to believe the link is up. Is this normal behaviour? I ...
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1answer
35 views

Network issue - only one machine can't access webpage on another machine

I'm trying to figure out why my MacBook is unable to reach the web page served by my Raspberry Pi while other computers on my local network (or on external networks) have no problems seeing the web ...
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47 views

Unable to set wifi frequency/channel on Raspbian

Hey I'm trying to configure my Raspberry Pi to connect to my router on channel 8 (2.447G). The WiFi network adapter I have for my Pi seems to be stuck on channel 1. iwlist scan only lists the one ap ...
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1answer
143 views

iptables couldn't load target allow

I am using the command below to allow all traffic from hosts on my internal network but it says "iptables v1.4.18: Couldn't load target `ALLOW':No such file or directory". What is the problem here? ...
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237 views

Connected to WiFi, no internet access - Linux Mint

I connect to a my AP and I get a message "Connect to ..." but I cant access the internet, nor ping anything exept my gateway. I tried changing the DNS Servers to google ones but with no use. Any ...
5
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2answers
156 views

Create a computer lab using Linux [closed]

I would like to know, how I can create my own Linux lab, like the universities Linux labs. I mean OK, I can install for example Fedora to all my 4 PCs, but how I can login from different computers, ...
3
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0answers
116 views

What do I need to add a virtual IPsec adapter?

I'm trying to set up an IPsec connection manually from the console with iproute2. What I need is a virtual interface (at best, a virtual IP address could also be sufficient) that IPsec-transforms ...