Managing and using network connectivity on a unix system

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1answer
2k views

Start network service at boot time on CentOS

I've recently reinstalled CentOS onto a computer of mine. I have OpenSSH Server on it now, as did I before I reinstalled the operating system. Here's the difference: Before, SSH started without even ...
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0answers
360 views

What problem have I caused to eth1 by resetting my ubuntu machine?

I am using ubuntu 10.04 (Bio-linux 6.0). Last night I tried leaving my system in hibernate mode because there appears to be a bug in this version of ubuntu such that if I do a straight shut-down, the ...
3
votes
1answer
3k views

Heartbeat 3 binding socket error

I've been tying to install Heartbeat3.0.5+Pacemaker1.0.12 on CentOS 6.3 64bit via yum. The installation seems to be successful, but there is a problem when starting Heartbeat. I put some info related ...
4
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1answer
2k views

Is berkeley packet filter ported to linux?

I am doing some research to figure out what distro's of linux contain kernel packet filtering and are compatible with BPF. http://kernelnewbies.org/Linux_3.0 http://lwn.net/Articles/437981/ These ...
5
votes
1answer
469 views

How to make sure OpenVPN is connected?

I need some sort of "safeguard" for my VPN connection. If the connection drops, the machine shouldn't even reach the internet. (I can reach the machine by other means.) Is it possible somehow? If I ...
5
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3answers
2k views

How can I know the process name which is opening a tcp port?

I have two linux servers. Let's say they are C and S. C is client of S On my S machine, I type. $ netstat -an | grep ESTABLISHED tcp 0 0 192.168.1.220:3306 C:57010 ...
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11answers
65k views

Cannot enable network after CentOS 6.3 fresh install

I am trying to perform a fresh CentOS 6.3 installation then run various yum commands such as yum install httpd. The installation runs fine, however I cannot run any network based commands like yum I ...
3
votes
1answer
6k views

Add another IP address to a Bonding Interface

I have a Linux network Bonding interface for two Ethernet interfaces (eth0 and eth1) $ cat /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 BOOTPROTO=static ONBOOT=yes ...
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2answers
939 views

SIOCSIFADDR: File exists after upgrading kernel

Since upgrading my (Gentoo) kernel from 2.6.38 to 3.3.8 (via oldconfig), I can't get the network on eth0 up anymore. It reports "SIOCSIFADDR: File exists" with a number of other SIOCSIF* errors that ...
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3answers
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How do I get to use .local hostnames with Arch Linux?

If I'm using Ubuntu or Linux Mint (the only two flavours I've tried and know work for sure), I can run something like this: wayne@myhost$ ssh wayne@otherhost.local And the name is automagically ...
7
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1answer
3k views

Why is ping so slow?

My setup: Server in the cellar + GBit switch. Long cable to the roof. GBit switch. I have three computers in the roof. One has only 100MBit ethernet, one laptop with GBit and a new computer. Ping ...
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1answer
2k views

connecting (bridging) two networks

I would like to connect (bridge) two networks (ppp0 and eth2). Normally you would do this with brctl but one of the network-interface is a ppp-device so it won't work (ppp can't transport ppp-frames). ...
3
votes
1answer
5k views

How to handle network interfaces on Crunchbang Linux desktop?

I have installed Crunchbang 10 (Statler) which is based on Debian 6 (Squeeze). By default there is network-manager-gnome 0.8.1 (/usr/bin/nm-applet I believe) running with an icon near the clock/tray ...
7
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3answers
19k views

How to check from a command line that network is reachable?

I want to send a growl to myself after SuSE server finishes the boot process. I got this message socket_sendto(): unable to write to socket [101]: Network is unreachable in. How can I check from ...
3
votes
1answer
1k views

Why isn't my application receiving broadcast packets?

I have written a Qt application that listens for UDP broadcast packets on the network interface p2p1. I have installed the application in Fedora 17 i386 in a VirtualBox VM. For some reason, the ...
2
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2answers
3k views

How to install a TP-LINK network adapter?

How can I install a TP-LINK network adapter? I have 8 files for Linux driver they are: compat.h, crc32.h, ethtool.h, Makefile, mii.c, mii.h, sundance_main.c and readme.txt. I am new to Linux and am ...
5
votes
3answers
12k views

How can I restart a network interface?

How can I restart a network interface? I have a vm that doesn't update its IP address correctly when switching between home and work. The vm runs Ubuntu server and uses a bridged network adapter.
5
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3answers
817 views

periodically can't access google

On a daily basis, at around the same time each day (early morning and early afternoon), my computer stops being able to access google or any sites that use google code (including sites that use google ...
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1answer
426 views

How to configure ADSL connection using bash?

I know it's possible to configure the modem to automatically connect the internet using a browser, but I want to do it using bash. I would like the network to automatically connect when the system ...
2
votes
2answers
155 views

need explainations on this network route

I'd like to get some insight as to how I can possibly access network devices that are on a different IP range (obviously not mine) compared to what is configured on my wifi router? setup home wifi ...
2
votes
1answer
1k views

Networking is not starting up?

I have a Raspberry Pi and while its plugged into the network via ethernet, my setup works and I can connect to the static IP. Today I bought a wlan adapter and after install it works great too... but ...
5
votes
1answer
2k views

How can I use netconsole to help solve a kernel panic?

When I try to use a raid as root, my system panics. I want to read the kernel output right before the panic, but can't scroll up. After Googling a bit, I wanted to try netconsole. but I get no output ...
2
votes
1answer
256 views

Where can I find the wireless driver for BCM4311 for OpenIndiana 148?

I know that OpenIndiana 148 doesn't have the network driver (BCM4311) for the laptop. I wonder if anyone out there can help, or point the way to me where I can get the driver?
3
votes
1answer
4k views

Why would my Linux host suddently stop receiving multicast? All other nics on private network are receiving

Here is my dilemma. Suddenly, as of yesterday, multicast packets are no longer being received from eth1 (private gigabit network) from one node. Routing between all the nodes is fine, no collisions, ...
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1answer
3k views

How to configure VirtualBox to route through tor?

How can I configure VirtualBox to route all network access of a guest OS through TOR? My host system is running Linux, and I've already set up TOR on it.
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4answers
2k views

Clock skews on remote machines

I am performing some experiments on a network of about 10 remote Linux computers which are geographically scattered. I suspect some of them have clock skews but they are seen transiently (eg. once in ...
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1answer
1k views

Network Printing in Fedora

I´m having problems setting up network printing in Fedora 16. In the printer setup box it says FirewallD is not running and gives a list of protocols that need to be enabled. I cannot find a FirewallD ...
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1answer
2k views

How to enable WIFI on VMWare Fedora 12? (It's detecting and working fine on Windows 7)

I am new to Linux. I have Fedora 12 running on my VMware. I am unable to see any options to enable WIFI connection on Fedora. When I am accessing Internet through WIFI and its working perfectly fine ...
2
votes
2answers
211 views

IPv6 in IPv4 over LAN

I want to setup IPv6 in my LAN, but also want to have some machine to use IPv4 only. How do I do such setup so that every machine can communicate with each other ? All machines supports dual-ip ...
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votes
1answer
1k views

Installing openSUSE 12.1 on Asus Zenbook UX32VD

Tales of woe (or, the backstory) So my boss who hates the idea of windows and virtualization had brought me his fancy new Zenbook UX32VD wanting openSUSE 12.1 to be installed on it. SO far I have hit ...
7
votes
4answers
7k views

Traffic stats per network port

I have two machines with two applications that talk to each other on few network ports (TCP and UDP). I want to count traffic that they send and receive. I need not only overall count but stats per ...
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6answers
15k views

How to remove mounted locations that have been added using the mount command?

I've mounted few shared locations using the below command. mount -t cifs /mnt/systemfolder -o username=name,password=password //10.10.1.1/My-Shared-Folder A few incorrect locations* have been ...
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1answer
2k views

Changing DD-WRT's default IP address

I have Buffalo WZR-HP-G300NH wireless router and I updated the firmware to DD-WRT (the newest build). The rest of my home network is in IP scope of 192.168.0.100-200 and this router has it's own. The ...
1
vote
1answer
3k views

Bridging ethernet interface

I have a server with 4 public IP's. I have it with this configuration and I want to bridge the interface eth0 for using it with KVM: So, I have 3 IP's (A.B.C.144, A.B.C.145, A.B.C.146) and another ...
2
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1answer
287 views

Debian system - Network security tools

I am using Debian 6 and i need help on best GUI/CLI tools which can help me on port,IP scanning and stalking of I/O data though the network .
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2answers
1k views

Network file sharing between Linux and OS X

I want to share a drive/folder over the internet from my Debian machine back home, such that I can mount it on my Macbook when I am on the move. Basically I want to store my music at home and just ...
6
votes
1answer
3k views

Terminal commands equivalent to NetworkManager's “Use as Hotspot” option

I'm making a gui application which will control my laptop in order to make it act as a wifi hotspot. I may change distributions so I want to find a solution which will work generally for all ...
1
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1answer
188 views

crontab sets up user variable, redirect output, and detect connetcted network

I have three problem, all of them are about crontab. Can I access $HOME variable in crontab ? for example, use $HOME like this: PATH=$HOME/bin:$HOME/scripts:$PATH ? or * * * * * echo "test" > ...
2
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2answers
1k views

debian wireless networking configuration

When I issue the command iwconfig wlan0 essid NAME it sometimes takes a really long time to actually be able to view any webpages through a browser. I don't know why that is. Right now the ...
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0answers
900 views

How to use Public IP in case of Two ISP which difers from each other Pfsense [closed]

Please bare with my long explanation but this is important to explain the actual problem. Please also pardon my knowledge with PFsense as i am new to this. I have single PFSense box with 3 Ethernet ...
1
vote
1answer
237 views

RTL8139 not being detected on openSUSE 11.3 - can installing openSUSE 11.0 on VirtualBox help?

http://en.opensuse.org/HCL:Network_(Wired) This hardware is getting shown in BIOS, but lspci dosn't show it on openSUSE 11.3. So, if I plant openSUSE 11.0 on the VirtualBox on 11.3, will that get it ...
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2answers
2k views

iperf gives wrong output

I ran iperf on Windows and Linux machine to check bandwidth speed. Windows bandwidht speed, I explicitly set to 10Mbps/Full and Linux's BW speed is 100Mbps/Full. Following is the strange output I ...
6
votes
2answers
4k views

How do I share internet with Windows from my Linux box?

I have a Linux (Ubuntu 12.04) PC connected to the internet with a Greenpacket WiMax USB modem. I want to share the Internet connection with another computer running Windows 7 Home Premium, connected ...
5
votes
2answers
4k views

How to know if a network interface is tap, tun, bridge or physical?

As far as i know, there are 4 main types of network interfaces in linux: tun, tap, bridge and physical. When i'm doing sys admin on machines running KVM, i usually come accross tap, bridge and ...
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3answers
3k views

How to know if a process is attached to a tap interface?

I sometimes come upon machine with tap interfaces (eg, when KVM is running). How can I know which process is attached to the TAP interface?
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2answers
1k views

How does iperf calculate throughput and jitter?

I've read that iperf basically tries to send as much information down a connection as quickly as possible reporting on the throughput achieved. This tool is especially useful in determining the volume ...
3
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1answer
2k views

debian wireless networking through terminal

I'm starting to use the wmii windows manager and I want certain pieces of information to display on a status bar. If I were to want to display the ESSID for the network, I would have to find it ...
3
votes
2answers
402 views

Network issue in vsat

In my server-client architecture, I multicast 100 MB files to many clients from server via satellite link. Network traversal is through 5 hops. I have the 10Mbps ( i.e. 1250 Kilo Byte per second ) ...
2
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0answers
1k views

Printing failure at a network printer in linux

I added a network printer to my network by the RedHat Enterprise workstation 6 linux GUI. It seemed that the printer setting did find the network printer. However, whenever I tried to print, the job ...
4
votes
1answer
532 views

Control source address for whois queries

is it possible to execute the command "whois" and choose the outgoing ip for the query? I have mounted several IP's on my network interface "/etc/network/interfaces" for ssl porpuses, but would be ...