A computer network allows sharing of resources and information among interconnected devices.
1
vote
2answers
101 views
Can Linux PC serve as network router?
I was wondering if it is possible for Linux PC to substitute router in small networks.
I'm not expert in networking so this question may be stupid, but I don't see why one should not use Linux ...
1
vote
1answer
158 views
Mint: equivalent command line call for airplane mode
OS: Linux Mint 14
Can someone suggest how to turn on airplane mode from command line instead of using the GUI?
Also can someone list what all are turned off by enabling airplane mode?
or how to turn ...
0
votes
2answers
241 views
Heartbeat with virtual IP at Ubuntu 12.04
I have installed heartbeat package at both linux devices so that when ever clients request a service they will be arrived to this IP, and client will not know what are the back-end/actual ip addresses ...
4
votes
2answers
6k views
CentOS eth0 not starting
Why would my new CentOS Virtual Machine not start eth0 on startup? I have to start it manually every time. How can I fix this?
Thanks.
2
votes
0answers
203 views
ping receives no packets, but tcpdump can see them coming in
I'm migrating an old Ubuntu OpenVZ instance (Jaunty) to a new CentOS 6.3 host (using vzdump/vzrestore).
Now networking does not work properly. Facts:
It works just fine if a setup a new OpenVZ ...
1
vote
1answer
194 views
enable networking inside a freebsd jail
So I'm mostly a linux newbie itself. Let alone freebsd, so please bear with me. I just need some very basic clues to get this to work. I use FreeBSD 9.1 64-bit from the list here.
On my freebsd ...
1
vote
2answers
84 views
2 ip ranges / 1 nic OR why does one ip range follow default route before local routes
Updated at the bottom
I'm using Centos as a router, and just replaced the routing system at work. I've got 2 routers to send data around. For the most part it's working. On one router I have 2 ...
0
votes
0answers
38 views
Wired connection going through wrong router
My son has a problem not getting a cosistant wifi signal in his bedroom so he uses another router wired to the gateway. The problem I have is that when I connect to the gateway his router issues me my ...
1
vote
2answers
70 views
Ephemeral port : What is it and what does it do?
I suddenly came across the term "ephemeral port" in a Linux article that I was reading, but the author did not mention what it is.
What is an ephemeral port in UNIX?
2
votes
2answers
153 views
Second loopback network interface (for netem)
I would like to add a second loopback network device on Linux, so that I have lo and (e.g.) lo2. This is so that I can use netem to simulate a throttled network over lo2 without compromising my ...
1
vote
1answer
85 views
kvm guest Network interface no Authenication
i have a kvm host based on ubuntu 10.04 host , and the guest is rhel 5.3 64-bit,
on the guest i tried to execute mii-tool eth0
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 ...
0
votes
1answer
80 views
How do I safely perform the below changes to network parameters on Solaris 10?
I need to change and test some TCP/IP network parameters on a Oracle Solaris 10 as a possible workaround for a bug in 'Oracle Hyperion EPM 11.2.1.0' in the development environment.
I am not a ...
0
votes
1answer
66 views
NSLookup how to interpret output
Hi can someone help me to understand what this NSLOOKUP command's output
[x]$ nslookup sample.abc.com
Server: 161.43.32.162
Address: 161.43.32.162#53<-- ???
Name: sample.abc.com
...
7
votes
2answers
4k views
Does mount always require root privileges?
I was under the impression that any sort of call to mount requires root privileges.
But recently I was told "You should instead create appropriate entries in /etc/fstab so that the filesystems can be ...
1
vote
0answers
298 views
Network Simulator ns-2: Modeling of fragmentation in the network with different MTU on routers
There is a simple network model. Transfer a file between hosts.
There are several routers with different MTU. Here is the complete OTcL code:
...
1
vote
0answers
173 views
Ubuntu 10.04 kvm Virtual Machine guest network speed slow
i have the following situation, i have a kvm host ubuntu 10.04 LTS 64-bit network host speed is perfectly run , as i am testing network speed using iperf , the speed between any network device and the ...
1
vote
1answer
170 views
How do I access a web server behind NAT and proxy?
I have installed a local web server for an web application for a customer. Their server is behind NAT and uses proxy for access internet.
Is there a way to access the web application remotely from ...
1
vote
2answers
147 views
“Network unreachable” outside of LAN
I have a Linux server which runs several services (namely Minecraft :)). Recently, I've been having trouble getting it to connect to the Internet. For example:
root@fcwtech:~# ping google.com
ping: ...
5
votes
1answer
113 views
In bash, can I asynchronously open sockets and use them later?
I had no idea that Bash supported so many advanced features! I started working on a simple network program to try and use some of these things I found. My particular program is a basic redis client ...
0
votes
0answers
38 views
How to tune Unix (Ubuntu) for web crawling?
What are some ways to tune some Unix settings in the kernel(or elsewhere) for web crawling purposes? I am using multi-curl, and am using a multi-threading approach. I've set a higher limit for maximum ...
12
votes
8answers
32k 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
2answers
409 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
vote
1answer
100 views
Compling KUTE traffic generator 1.4 on Fedora Core 5
I am trying to install KUTE traffic generator on Fedora Core 5 kernel version 2.6.15.
When I try to complile I get this error message:
[root@dhcppc128 kute-1.4]# make
make modules
make[1]: Entering ...
3
votes
1answer
1k views
Wireless problem with RTL8723 and Fedora 18: can't connect to a wpa2-secured network
I'm running Fedora 18 on a Toshiba laptop with the notorious RTL8723 wireless card. I've been able to compile the driver using lwfinger's instructions from this forum thread here
wget ...
1
vote
1answer
325 views
Is there a faster interface for info from /proc/net/tcp?
Given a linux TCP socket's inode (obtained via /proc/<pid>/fd), is there a faster way to look up the information that I can get from /proc/net/tcp about this socket?
I have written a ...
3
votes
1answer
189 views
Tunnel AFP over SSH over Internet
I can't seem to figure out how to connect to AFP over SSH. Here is my setup:
[Raspberry Pi] <---> [router] <---> (Internet) <---> [Client]
I'd like to be able to connect to my ...
11
votes
5answers
3k views
How to get my own IP address and save it to a variable in a shell script?
How can I get my own IP address and save it to a variable in a shell script?
1
vote
0answers
41 views
Trying to install DIP (Dialup Networking) package for SLIP protocol
We are trying to interface with a wireless modem that connects to a computer via a com-port DB-9 connection. It uses SLIP in the sense that the modem hosts a SLIP server and requires the interfacing ...
1
vote
1answer
586 views
RaspberryPi drops Wifi connection
I am using Airlink Fully compatible Wireless N 150 Ultra Mini-USB Adapter (AWLL5099) with my RaspPi to get internet. I am also bridging this WiFi connection with an Ethernet cable to provide internet ...
1
vote
2answers
201 views
Can connect to wireless router but can't browse internet
I have a Dell Studio 1450 running Fedora 17. I installed a new wireless router in the office recently. And everybody apart from me is able to connect to the internet via it.
Google revealed ...
1
vote
1answer
347 views
Only routing certain traffic through VPN
I have a central development server, running a VPN server, and a couple clients that need to connect to it. The server is running Apache, but is only accepting local requests (only listening on ...
1
vote
0answers
100 views
Packets not received by TUN device
I created a TUN device(nat64) and created a route so that all the required packets are forwarded to the TUN device from an eth device. But, I see that many packets are not received by the TUN device.
...
2
votes
1answer
61 views
Make a linux network device a router
I am developing an IPv6 network device driver. It should behaviors like a router, i.e. send router advertisement regularly. But now my device is working like a node, send router solicitation. What ...
10
votes
2answers
582 views
Driver is sometimes loaded, sometimes not
I was assigned an Ubuntu desktop with some stuff already on it. I did not reformat it, but attached a mini-PCI wireless card over a PCI to mini-PCI adapter. I manually built the madwifi driver and ...
1
vote
1answer
496 views
Redirect Packets from ppp0 interface to ethernet interface in linux
My question is similar to this question, however with some change.
I have a PPPoE connection on my Linux Machine (CentOS kernal 2.6.32) as a client, so that when I setup this connection, another ...
2
votes
0answers
527 views
tunneling FON traffic via Tor
I would like to tunnel the traffic of my FON router through Tor.
For that I added a second network card to a local server and connected the FON router to it. Then I set up a DHCP server and configured ...
5
votes
1answer
410 views
Bonded network interface is not available after a reboot
I have some servers with multiple network interfaces, setup with bonding and some VLANs. Whenever I reboot the server, one of the bonded network interfaces is not reachable from other servers, nor can ...
2
votes
1answer
102 views
directions about customized Layer 2 implementation in linux
I have some machines running on the same network. One node is the control node which distributes traffic coming to it to the other nodes. The thing is that I want to have a custom protocol header ...
1
vote
1answer
51 views
Why does dladm rename-link fail with “invalid argument”?
I am running Solaris 11.1 (in a VM) and have two NICs installed.
At a root console, if I type dladm show-phys, it lists net0 and net1 and some info for each.
I want to name the links more ...
1
vote
1answer
170 views
How do I set up several interfaces all bridged onto eth0?
I have found several guides to bridging a single interface (eg br0) onto eth0 but none for multiple interfaces (eg br0, br1 etc).
Is this possible?
2
votes
2answers
242 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 ...
2
votes
1answer
128 views
How to fix networking driver boot load failure after replacing hardware?
After replacing the motherboard, which is the same as after replacing the network adapter interface hardware (NIC), our Debian 6.0.6 no longer loads the networking driver on boot.
The manual approach ...
0
votes
2answers
169 views
Bandwidth, CPU & Memory stats returned in single line from terminal
I'm trying to create a simple monitoring system that will show a graph of sales that is linked entirely to data of bandwidth, CPU and Memory stats as they relate to sales. So if I sale 1 widget per 5 ...
1
vote
0answers
364 views
Debian, two network cards - “no route to host” on eth1
I have added a secound nic in a debian box. That nic is ment for doing some test stuff, so those devices connected should just be able to access the debian box or be accessed from it.
To set up the ...
0
votes
2answers
751 views
Dropbox doesn't connect properly on boot
I'm having a problem with Dropbox (version 1.1.35). When I first boot it takes some time before Network Manager connects to the WLAN. Then I see the Dropbox icon in the task list, claiming to be ...
4
votes
1answer
943 views
How to create an ad-hoc connection?
I need to make an adhoc connection on Archlinux (netbook used as a wifi repeater), I was using this tutorial to do it on Ubuntu :
At the terminal install execute sudo apt-get install dnsmasq-base ...
3
votes
1answer
315 views
The n mode on “iwlist wlan0 scan”
I know how to determine if scanned AP uses B or G mode, but how to know (using "iwlist wlan0 scan") it uses N protocol ?
if I use "iw dev wlan0 scan" and see if the cell has a "HT capabilities" block.
...
1
vote
0answers
77 views
Deny/allow a user's access to a port dynamically
I have stumbled upon this little tech dilemma yesterday, and know that there is a solution to it (IRC BNC resellers have it implemented already). However, the exact details and implementation elude ...
3
votes
1answer
138 views
Why does wlan1 not get a static IP?
I have a Raspberry Pi with two USB wlan adapters. wlan0 is configured with DHCP and wlan1 is configured with a static IP address and hostapd (access point) is running on this interface. The adapter ...
2
votes
2answers
228 views
Averaging output of dstat
I need to average upload and download speed using dstat -n. How can I add all the received and sent data sizes that appear after dstat -n, so that I can add them and find average upload and download ...
