Managing and using network connectivity on a unix system

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661 views

Missing Firmware for Wired NIC on Debian

I'm trying to install debian 64bit from a debian live image using YUMI on my usb drive. I'm installing it on an Inspiron 6400, and there is missing firmware. I can't connect to the internet ...
2
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2answers
3k views

Why doesn't eth0 get an ip address when set up in a bridge?

I'm trying to understand how dhcp for IPv4 is used with bridging. eth0 is configured to be in br0. This is working just fine but only br0 gets a dhcp lease, while eth0 doesn't. Both are configured ...
1
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1answer
510 views

How to get the cloned guest connected to the Internet?

I made a clone of a VM(running a version of Centos 6) on KVM, but the clone wouldn't connect to the Internet. Issuing ifconfig shows no interfaces but the lo. Interestingly, the original system can ...
1
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1answer
585 views

How can I resolve local IPs to hostnames? [duplicate]

Possible Duplicate: How to make a machine accessible from the LAN using its hostname I have is a simple home network with a few machines connecting through DHCP. If everyone and their ...
1
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1answer
2k views

ifconfig + FAILED from ifconfig on solaris machines

please advice - what the meaning of FAILED word from ifconfig command Dose its mean that network from NIC isn't stable until this moment ? Not clearly if ifconfig read network status each some mili ...
0
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1answer
926 views

Why does sshd accept local network inbound connections and refuse external inbound connection?

When I try to connect to my server from the internet, I always get: debug2: ssh_connect: needpriv 0 debug1: connect to address XX.XX.XX.69 port 22: Connection refused ssh: connect to host XX.XX.XX.69 ...
7
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1answer
382 views

Installing USR 5422 on Ubuntu 12.04

I am a newbie to Linux. I was trying to set up the USR5422 USB adapter. It worked fine for the first time, but since then it freezes the computer most of the time. What commands can I fire to see ...
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1answer
1k views

Alternative to ethtool on MontaVista embedded Linux

I am running MontaVista Linux Professional Edition 3.1 on an embedded system. My version of this distribution doesn't seem to have ethtool available, and using mii-tool gives the following error: ...
2
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1answer
786 views

How to config iptables for pppoe?

When I create the only rule disabling all input, iptables -P INPUT DROP I can not connect anything. So it looks like I should allow some incoming activity to get PPPoE working correctly. What rules ...
0
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2answers
111 views

How do I set up a small personal network with Linux? [closed]

I want to take the time to get into building a useful network for use between my personal machines using Linux. I have spent a lot of time scouring the web for resources on how to do this but I am ...
2
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2answers
732 views

Bandwith monitoring in Linux

I just need to get how much bandwidth is used in 3 or 4 days. Do you have any application in the terminal to do it? I'd prefer if it didn't use SNMP. I found iptraf, wireshark, cacti, but they were ...
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3answers
342 views

How can I view and play shared audio files through a network?

I've come up with a quick pet project (which might, maybe, even end up being useful at my home someday); the idea is to allow users of a Linux device (I'll call it A, and it'll probably be a small ...
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1answer
3k views

Redirect Output with Iptables

Is possible on Debian to change the port of packets that are going to a specific port, using iptables? Example: I want packets going in the outbound direction to a.b.c.d for port 1723 to be ...
3
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1answer
625 views

Ubuntu networking: can't connect to LAN

I have a server with Zentyal 3.03 (Ubuntu 12.04) LTS. It has 3 network devices: eth0 - dhcp fast internet (I pay for it) eth1 - static slow internet (it's free for the school) eth2 - LAN I can ...
1
vote
1answer
541 views

No network in slackware

I have just installed Slackware. I am not new to Linux but new to Slackware. I wonder how to install network in it. After the Slackware installation, audio and network were not working. This is ...
0
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1answer
79 views

What to make of system scans reported by psad

My system logs show that psad detects scans like this every minute. psad: scan detected: 192.168.1.10 -> 192.168.1.1 udp: [53] udp pkts: 2 DL: 2 If the first address is mine, and the second ...
17
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3answers
40k views

Can't ifdown eth0 (main interface)

I can't ifdown an interface on a Debian 6.0.5 box; user@box:/etc/network$ sudo ifdown eth0 && sudo ifup eth0 ifdown: interface eth0 not configured SIOCADDRT: File exists Failed to bring up ...
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2answers
1k views

What are the ramifications of setting the hostname?

I have several Amazon EC2 servers and I'm using Chef to manage the configuration. I'd like to set the hostname so that the default bash prompt is more helpful. Right now after launching a new server ...
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2answers
5k views

How do you configure the MTU for all network adapters via a script?

NOTE: This is for RHEL/centOS. Currently my way of configuring the MTU is via GUI using system-config-network and setting the MTU to 4096. I would like a non-interactive script to do this instead. ...
1
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1answer
198 views

Usb-ethernet device

I have CP210x Composite Device. This device is USB-to-RS232 converter. When I plug it into Ubuntu-11.10, module named cp210x get inserted but I don't know why it did not create "usb0" network device ( ...
12
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3answers
18k views

How to configure external IP addresses for LXC guests?

I'm exploring the LXC features in Ubuntu 12.04 and I really want to set up a network like this: client1: 192.168.56.101/24 lxc-host: 192.168.56.102/24 guest1 192.168.56.201/24 guest2 ...
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2answers
375 views

Linux program to look into what you're downloading

Is there a linux program that allows you to look into your current download traffic? Something that can list all the addresses I am currently connected to and downloading from.
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3answers
20k views

Linux network troubleshooting and debugging

From time to time Linux and Unix users faced with various network problems. Many of these problems are presented here and at some others troubleshooting forums, but the are very concrete and contains ...
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2answers
5k views

Monitor mode wifi only seeing broadcast packets

I have pretty much exhausted every link I have found on google regarding this topic, and I'd like some of the most experienced eyes on the problem, because something obscure must be going on. Systems ...
1
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1answer
695 views

Reducing ubuntu boot time using dmesg

The boot time is 141 seconds. Here's the most interesting parts of dmesg command: [ 2.870498] usb 1-1.2: new high-speed USB device number 5 using ehci_hcd [ 80.669210] ADDRCONF(NETDEV_UP): eth0: ...
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3answers
3k views

How to setup wine for networking in linux

How to setup wine for networking? Unless i have linux access to my windows network, i can't do wine discover the windows network. How to do it?, also wine hasnt cmd line utility so i can't use ...
2
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1answer
3k views

How to Connect to Wireless Automatically? (Non-graphical)

I'm trying to set up my Arch Linux so that, through non-graphical means, I can connect to a wireless network through profiles on my system. I have tried net-auto-wireless, and it does everything I ...
2
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1answer
1k views

RHEL how to sync network settings between GUI and configuration files in /etc/sysconfig/network-scripts/?

In RHEL, we can change network settings either using GUI or editing the configuration files in /etc/sysconfig/network-scripts/. I would like to know how the network settings (e.g. IP address, ...
14
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4answers
1k views

TCP dies on a Linux laptop

Once in several days I have the following problem. My laptop (Debian testing) suddenly becomes unable to work with TCP connections to the internet. The following things continue working fine: UDP ...
2
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2answers
127 views

Cannot Restore LAN Connection

I have two servers, 198.162.0.4 and 198.162.0.10, that were connected across a LAN. They are the components of a DMZ where 198.162.0.4 is the wen server and 198.162.0.10 the application server. ...
2
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2answers
999 views

Quickly check whether many network hosts are up-and-running

Objective: check if a host is up-and-running on the network, with a method that can be efficiently parallelized over many hosts. Emphasis on a QUICK turnaround of the check. Reason to emphasise ...
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0answers
639 views

Can't launch Snort on CentOS 6.3

I have a problem installing Snort on CentOS 6.3 in a virtual environment. When I run snort - ./snort status: Running in packet dump mode --== Initializing Snort ==-- Initializing Output ...
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2answers
304 views

How to schedule a job that depends on network availability?

I have cloned a git repository of some project. I want to automate git pull and compile the project once in a week. I am using a laptop which wont be on 24x7. Now, I cannot use cron as I should keep ...
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1answer
1k views

How do I safely unmount a network share on Linux STB without crashing (I get GSOD)?

I have a network share named dreambox on C:\dreambox that is shared with the group Everyone in Windows. I have mounted it to /hdd on a Linux-based STB with OpenDreambox (OpenEmbedded) using Telnet ...
2
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0answers
918 views

Can't ping gateway after bridge

I am running CentOS 6.3 with NetworkManager disabled. I was trying to set up a network bridge to try out setting up guests w/ kvm. I was creating a bridge before setting up stuff with kvm, just since ...
2
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1answer
528 views

What does “kernel-resident” mean?

Quoting from the ifconfig man page: ifconfig is used to configure the kernel-resident network interfaces. It is used at boot time to set up interfaces as necessary. After that, it is ...
6
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1answer
432 views

Why the difference between network addresses reported by hostname and ping?

I have tried hostname and ping in a cluster machine, with different outputs. I am wondering what is the difference between the two? For example, on the same machine, hostname outputs node4.XXX and ...
3
votes
1answer
670 views

Network interfaces for Jails

I have been reading over the creation of Jails on FreeBSD, and one stumbling block I have is regarding network interfaces. Say my local router is 10.0.2.1, and the BSD box is 10.0.2.5. I would like ...
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2answers
3k views

Easily connecting to the internet with FreeBSD

I am a beginner at using UNIX, and I have a small Toshiba notebook computer which I installed FreeBSD 9.x on. I looked at the online handbook to try to find out how to connect to the internet, but ...
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2answers
4k views

Cannot get Realtek r8168 ethernet card up

I've working on Arch Linux and in 99% of time I connect to internet by WLAN but sometimes I need to use ethernet connection, so today I see something strange. My eth0 device is down, and I can't get ...
0
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1answer
188 views

How to use linux tools to verify a site's authenticity

When I go to certain websites where it's important for me to know that I'm connected securely, certain browsers will say that the site failed the authenticity check. Firefox won't say anything, but ...
4
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1answer
117 views

Play sound when connecting to network

I thought it would be fun to play a sound when connecting to a network of some sort (wireless or otherwise), kind of like the dial-up sounds of yesteryear. EDIT: Clarification: when connecting to the ...
3
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4answers
23k views

How to put Mac OS X wireless adapter in monitor mode

I'm searching for a equivalent of "iwconfig eth0 mode Monitor" in Mac OS. From man iwconfig mode Monitor does the following: "the node is not associated with any cell and passively monitor all ...
3
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2answers
1k views

Does Linux have support for network interfaces over an AT-Command serial modem?

I've got a Telit GM862-GPS module, which is a GPRS modem with a serial interface and uses the standard Hayes AT command set (with some extensions). What I'd like to do is to be able to connect this up ...
4
votes
1answer
3k views

Connect to hidden Wifi AP with wpa-supplicant?

I have a headless Debian machine, with a Wifi dongle connected. I used to hide the Wifi AP, but now I can't. If I unhide it, some lines in the /etc/network/interfaces will allow me to connect: auto ...
9
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2answers
15k views

Fast way to copy a large file on a LAN

I am having some trouble with NFS, and I'd like to try using just plain old TCP. I have no idea where to begin, though. Hardware-wise, I am using an ethernet crossover cable to network two netbooks. ...
1
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1answer
2k views

iptables forwarding and routing

In fact, this question is about openwrt and CoovaAP, but I guess it's the same in other linux distributions. I've two interfaces, a "wan" and a "wlan" interface. Is there by default any filter, ...
3
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2answers
499 views

Modifying TG3 Broadcom driver

I was wondering whether it's possible to modify the said driver in order to prevent adapter from using embedded SRAM, and use system RAM instead. And if so, how to do it. I have a laptop with ...
3
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2answers
3k views

Bridge not working

We want to create bridge (mybridge) on our board over eth0 and eth1 interface. The board runs Linux 2.6.34.9. Following are the commands: brctl addbr mybridge ifconfig eth1 0.0.0.0 ifconfig eth0 ...
6
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1answer
4k views

Find processes using a network interface

I'm trying to find a way to safely shutdown a network interface, i.e. without disturbing any processes. For this I need to find out what processes are currently using that interface. Tools like ss, ...