A computer network allows sharing of resources and information among interconnected devices.
2
votes
0answers
137 views
Ubuntu: How to configure DNS servers in /etc/network/interfaces correctly for resolvconf?
All examples I have seen of configurations (/etc/network/interfaces) showed that you configure an interface and then underneath that gave the dns-* lines such as:
auto eth0
iface eth0 inet static
...
1
vote
3answers
129 views
Block network access of a process?
Is it possible to block the (outgoing) network access of a single process?
2
votes
2answers
2k views
No network connection in CentOS 6.3 Minimal under VMWare Player
I'm trying to replicate in VMWare Player the exact same conditions I have under my Dedicated Server for testing purposes.
Now, the thing is that that when I try to install something, or ping ...
4
votes
1answer
53 views
Ways to give a process “idle” network priority
When I'm playing a game, I don't want Dropbox taking hogging my network connection. I have been able to noticeably reduce my latency by turning it off while playing. The same is true to a lesser ...
2
votes
1answer
149 views
Cannot reach outside network or IP after upgrading to Ubuntu 12.04
I am running Ubuntu 12.04 on my server but since the upgrade from 10.04 I can no longer reach any outside sources of the server.
I can SSH into the box, but from inside here I can not reach anything. ...
1
vote
0answers
130 views
Using a bridge, an LXC container can't ping router, but the host OS can
I've got a virtual machine running under virtualbox, and in that virtual machine I've got an LXC container I'm trying to bridge to virtualbox's NAT interface:
------------- ----------- ...
2
votes
0answers
53 views
To what extent does LXC manage configuring the network interface in a container?
In the LXC config file we can specify an IP address for a container:
lxc.network.type=veth
lxc.network.link=br0
lxc.network.ipv4 = 10.1.0.35/16
lxc.network.flags=up
lxc.network.hwaddr= ...
1
vote
0answers
60 views
Network in LXC not forwading through a bridge
I've got an LXC container, on the host I've got a bridge between the LXC container and eth0.
The LXC container can ping it's Host 10.1.0.5, but can't ping the gateway of 10.1.0.2. The host is able to ...
2
votes
1answer
377 views
CentOS network connection breaks every 5 min
I installed CentOS 6.2 about a month ago and it worked fine. Two days ago I saw that the internet connection is broken, so I reconfigured it. I was able to use it but after a few minutes it broke ...
3
votes
2answers
97 views
Use eth interface to connect to a router and wlan for the internet
I am currently trying to configure a router to which I connect to (to its web interface) using an Ethernet cable through the eth0 interface. That router doesn't have access to the internet.
Now, I ...
2
votes
2answers
77 views
Extra bridge interfaces get added automatically
I have a bridge set up between eth0 and br0, the bridge works fine, but sometimes, for unknown reasons and circumstances, I keep getting these off vethXXXXXX interfaces added to the bridge. When this ...
0
votes
0answers
56 views
Local host always being added to /etc/hosts.deny when trying to SSH
I have a rather odd problem with my server. For some reason the local hostname for my workstation keeps getting added to the /etc/hosts.deny and when I try to SSH I get:
ssh_exchange_identification: ...
4
votes
1answer
2k views
“Destination Host Unreachable” when pinging wireless router
I'm a little new to all the intricacies of Linux workings, so please bear with me if this is a dumb question.
I'm using Linux Mint 12 and I have an Asus PCE-N15 wireless card, which is running the ...
6
votes
2answers
795 views
linux multiple internet connections load balancing with fail handling
I have two ISP connections and need automatic load balancing between them. I also need to handle failed connections (not use one that does not work).
First link is a PPTP connection (ppp0), second is ...
1
vote
0answers
220 views
Configuring network settings manually in Qubes OS
I'm trying to setup Qubes OS on my desktop but struggling to get the network/internet working.
This is the configuration i want to setup -
ip - 192.168.1.2
Subnet - 255.255.255.0
Gateway - ...
0
votes
1answer
37 views
Make application listen to hosts under a different gateway
Network Structure
A typical college network. Different Hostels connected through LAN. All hosts in a hostel use the same gateway. I can directly communicate to hosts in other hostels using their ...
7
votes
4answers
5k views
How to find the IP address of a KVM Virtual Machine, that I can SSH into it?
I have follow this guide (Virtualization With KVM On Ubuntu 11.10) to setup my KVM (Virtual Machines Software) on my Ubuntu 11.10 Server. However, I didn't setup my VM's IP address when creating the ...
1
vote
2answers
148 views
How to transparently monitor SSH access/network traffic in Gentoo/general linux?
What's the most effective way to monitor SSH access in Gentoo Linux?
My Gentoo box is operating locally behind my broadband router. I have SSH port forwarding on the router and a DNS entry pointing ...
1
vote
1answer
87 views
Packet analyzer to intercept and filter incoming traffic before any client app
I am curious if most Linux distros make it possible to intercept incoming network traffic as soon as it enters the system and filter its content based on some rules before any other client can use it ...
1
vote
1answer
88 views
How can I disable IPv6 in custom built embedded setup
I have an embedded system built using buildroot. I have had a number of network issues, one of which is that my machine cannot see its gateway despite it being on the same subnet. I have tried using ...
0
votes
0answers
71 views
No AirPlay in XBMC on EeePC (Debian)
I have a Asus EeePC (900 model I think) and I've installed Debian 6.0 on it. I've managed to get WiFi working on it and I've installed XBMC. It's working with our NAS drive on the network but for some ...
1
vote
1answer
43 views
Custom application running on embedded device - do I need to register my listening port in /etc/services?
I have written an application that will run on an embedded device. The installation is very minimal and uses busybox and not many other things. Part of the software includes a listener thread that ...
11
votes
4answers
283 views
Is there a top-like command that shows the network bandwidths and file accesses of running processes
For example, we'd like to see:
PROCESS IF TX RX FILE(regular) R/W
prog1 eth0 200kB/s 12kB/s -- --
wlan0 12kB/s 100kB/s -- ...
1
vote
4answers
13k views
WiFI access in BackTrack 5 R1
I recently started using a live USB version of BackTrack 5 R1 (A kubuntu-based distro), but I can't find any way to enable access to my home WiFi network. I can't find any comprehensive tutorials on ...
0
votes
0answers
142 views
Tools to find OpenVPN UDP packet corruption
Are there Unix tools to troubleshoot UDP packet corruption? I'd like to avoid writing my own...
I think ping might report when a packet is corrupted, but it doesn't really seem to have options ...
21
votes
1answer
437 views
Why does it take up to several minutes to clean a listening TCP port after a program dies?
If I kill a program that is listening on a TCP port, it takes up to several minutes until the port is reclaimed by the system and usable again. I've seen several Q/A mentioning this phenomenon, but ...
2
votes
1answer
145 views
Very slow response from localhost when pinging
Networking is working fine on my gentoo machine. One connection is made, everything works fine with normal speed. But it is slow to wake-up : starting up connection is taking time. Even pinging ...
0
votes
1answer
229 views
Use of /etc/sysconfig/network-scripts/ifcfg-eth* files
What's the use of /etc/sysconfig/network-scripts/ifcfg-eth* files ? In some cases ifconfig lists the interface eth0 but I don't find the corresponding ifcfg-eth0 file whereas in other instances if I ...
-2
votes
2answers
4k views
How to run “sudo apt-get update” through proxy in commandline?
In my office I want to update and download through wget and here they are using a proxy. How can I get wget to use the proxy from the command-line?
3
votes
2answers
155 views
Use an USB tethered phone as network adapter
I am running CentOS 6 and was able to tether my HTC phone using a proxy called proxoid . This allows me to redirect HTTP. But how do I redirect the entire TCP traffic, e.g. if I need to setup openvpn ...
2
votes
2answers
61 views
Remote access SSH problem
I have been asked to setup a lab with 1 PC (fedora 18 OS) and 4 SGI (IRIX 6.5 OLD OS).
I am using a switch to connect them to university's network, and I asked tech guys to assign static IPs to them. ...
2
votes
0answers
41 views
Solaris 11: How to use ILB to create HA loadbalancer across two backend servers?
I'm attempting to use Solaris 11's ILB to create a loadbalancer across two backend DNS servers. Here's my requirements:
Two external IPs: .XXX.YYY, .XXX.ZZZ - these are the DNS IP's that our clients ...
13
votes
7answers
4k views
Faster way than ping for checking if computer online?
I'm writing a wake on lan script for a set of our lab computers. We have sqlite db with a list of the computer hostnames, IPs, and MACs and currently I ping each of them with '-c1' so it doesn't run ...
-1
votes
2answers
236 views
Unable to connect to remote host using ssh
I have recently installed Fedora in my system. But I am facing some problem in ssh login from remote machine.
I am able to login in that system but every time its requires me to login using GUI in ...
3
votes
2answers
186 views
tshark dump only when string is matched
I'm working on a web capture script where I only want to dump the traffic if the HTML body or URL contains a string defined in a .txt file.
Here is my tshark command which dumps src ip dest url (HTTP ...
1
vote
2answers
239 views
Why TCP TIME-WAIT State is present at both ends after a connection termination?
I am reading how the TCP states work and especially the connection termination part.
All of the books or online material I read, shows that for the termination procedure these states are followed ...
2
votes
2answers
478 views
Network naming on Arch Linux
I've just installed Arch Linux on my old PC, to do the installation I used wifi-menu wlan0, now I've reboot but if I type:
ifconfig wlan0 up
I have as a result:
wlan0: ERROR while getting ...
12
votes
4answers
564 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 ...
0
votes
0answers
115 views
get RSSI using commands?
mu network is group created by WIFI DIRECT, so i need to measure the signal strength RSSI between the client and its owner for android platform.
So, assume we know SSID and MAC address for owner or ...
1
vote
1answer
129 views
No DNS on Debian wifi after unplugging the DNS cable
I have installed wheezy Release Candidate 1 to my old laptop (Benq Joybook A52) right now, and I have some problem with my wireless card (Atheros 5006). It can actually see the wireless networks, I ...
3
votes
3answers
89 views
How to use a “hardware key” to control Linux networking
Sometimes I have trouble controlling myself while in front of the computer and I tend to procrastinate a lot doing Internet surfing. Fortunately I do not need Internet for most of my work.
So I would ...
3
votes
2answers
281 views
Getting current TCP connection count on a system
Instead of doing wc -l /proc/net/tcp, is there a faster way of doing it?
I just need a total count of tcp connections.
4
votes
2answers
3k views
bridged networking with kvm
I'm trying to get a guest virtual machine connected to my network using bridging. I've come across a couple of resources online, but they seem to be out of date, deal with xen or Ubuntu or don't seem ...
3
votes
1answer
76 views
Alternative to mrouted for DVMRP on Debian Squeeze
I need to implement DVMRP protocol to route multicast over Openvpn (tun) connection for some old 3Com NBX phones.
I use Debian squeeze so mrouted is not available (obsolete).
What can I use ...
2
votes
2answers
201 views
Can conky monitor other Linux computers on the network?
I know conky can monitor my personal computer, but can it monitor the other Linux servers I have on the network? I'd like to see data on CPU and memory usage and some critical processes each server ...
1
vote
1answer
115 views
With two interfaces, how can I make one the default route and the other an alternate?
I have wired connection to intranet / lan of my work (with proxy) and one wireless without proxy that doesn't have access to the office lan. (Like Guest Wifi)
My idea is to route all traffic to eth0 ...
3
votes
1answer
113 views
Madwimax: modem connecting but no internet
I'm using the madwimax package to connect a Samsung USB modem to the internet. It has worked well before, on previous versions of Ubuntu, but now that I upgraded to Ubuntu 12.10 I have had problems ...
0
votes
0answers
307 views
Openswan established NATed tunnel but, I can't ping remote end's lan PC
I am establishing site to site tunnel.
192.168.2.0/24===10.103.6.40<10.103.6.40>---10.103.6.1...10.103.6.29<10.103.6.29>===192.168.1.0/24;
Local ip: 10.103.6.40
Local lan: ...
2
votes
1answer
134 views
Route SSH to host through interface
is it possible to route all outgoing requests for SSH (port 22) to mydynamicdns.afraid.org via wlan0 instead of eth0 when both are connected?
Since my IP is dynamic, I would like to use a name ...
3
votes
1answer
235 views
Kickstart: one network card with DHCP, one with static IP?
I am using Kickstart to automate a CentOS install. I wanted one of the interfaces to have static IP so I wrote -
network --onboot yes --bootproto static \
-ip="intended IP" -netmask="intended ...
