A computer network allows sharing of resources and information among interconnected devices.
3
votes
1answer
241 views
Problem with path MTU discovery over pppd
I'm having an issue with pppd doing PPPoE on CentOS 6.3.
The CentOS system is a dedicated router/gateway which performs NAT (both directions) and various packet filtering. It has separate NICs for ...
2
votes
1answer
261 views
redirect web server with no-ip and port forwarding in livebox
I want my Apache web server running on a Livebox (home router appliance running Linux) to be accessible from the Internet (WAN).
I installed and configured the application noip2 on my Ubuntu PC. ...
2
votes
1answer
556 views
ubuntu server 12.04 lts is there a way to enable sleep mode and wake on lan?
I was wondering if it were posible to make my server go to sleep after a set period of time, but still be listening for lan requests. I use my server as a media server that might get used 3 or 4 hours ...
2
votes
3answers
126 views
Connecting Debian webserver to network
I am currently running a webserver with Debian 5.0.2. It has been working (more or less) fine for the past 2-3 years but recently it went down due to some power-outage. Ever since I have brought it ...
1
vote
3answers
245 views
Check if the residence's connection has internet access
I'd like to be able to test if I have access to the internet. My computer is connected to the residence internet connection.
I thought of using ping like this:
ping -q -w 1 -c 1 `ip r | grep default ...
3
votes
3answers
538 views
What's the easiest way to find an unused local port?
What's the easiest way to find an unused local port?
Currently I'm using something similar to this:
port=$RANDOM
quit=0
while [ "$quit" -ne 1 ]; do
netstat -a | grep $port >> /dev/null
if ...
2
votes
0answers
369 views
Terminal server (ser2net) to configure new HP procurve switch
Switch: HP ProCurve 2910AL-48G - J9147A
This switch is brand new straight from HP.
Anyone familiar with ser2net for creating a terminal server to connect from usb>serial>console port on a HP ...
1
vote
1answer
326 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 ...
1
vote
3answers
2k views
CentOS 6 - nameserver entry in resolve.conf resetting after restarting network services?
In /etc/resolv.conf, I've changed the nameserver line to a new IP address. After saving and exiting, I run service network restart. I then go open /etc/resolve.conf again and see that the IP address ...
3
votes
2answers
271 views
Connecting to wireless router
According to this manual I tried:
$ iwconfig
lo no wireless extensions.
eth1 IEEE 802.11bg ESSID:"g\xC6isQ\xFFJ\xEC)\xCD\xBA\xAB\xF2\xFB\xE3F|\xC2T\xF8\x1B\xE8\xE7\x8DvZ.c3\x9F\xC9\x9A" ...
0
votes
1answer
405 views
Setting mobile broadband connection in Fedora 17
I am using a Dell Precision M4500. I've realized that there is a SIM slot underneath the battery slot, I suppose it is for using mobile broadband access.
I am usually connecting to the internet ...
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 ...
2
votes
0answers
293 views
Send print job to printer immediately without queueing, aka increase print performance
I have a ruby/rails web application, one action of which sends PDF files that have been generated by the app to a Xerox 4127 printer on the network. This is accomplished via shelling out and running ...
1
vote
1answer
251 views
Extract binaries from pcap using command line (script)
As the title says, I'm looking for a way to extract binaries from PCAP's using the command line. I realize it is possible using Wireshark -> File -> Export -> http objects etc. But tshark doesn't seem ...
3
votes
4answers
357 views
Tools that monitor the network bandwidth based on IP?
In a networked environment, such as SOHO, is there any tools that can monitor the network bandwidth usage based on the computer's IP or mac address? So that we can know which user has the highest ...
3
votes
1answer
138 views
Using source routing (LSRR) - any ideas?
What I want to do is conceptually very simple, but I can't find any information or help about how to go about doing this.
Basically, I want to configure my networking to use source routing (LSRR). ...
0
votes
0answers
74 views
How to scan websites that are not available [closed]
I noticed that my cable provider isn't allowing me to access certain websites. At first I thought it was just my system, but after checking several other devices (Windows and iPad), I noticed it ...
0
votes
1answer
224 views
pcap and raw socket [closed]
I want to develop an application (module or user-level if possible) to create a raw socket in RHEL stealing all level-2 packets directly from kernel (without being routed or handled by other open ...
0
votes
2answers
235 views
Best way to find out what Linux Version is used on a Webserver
Is this feasible? Can I find out which distro is used to host specific webpages? Whois doesn't have info for this.
1
vote
2answers
121 views
How to find transmission speed?
Two host machine's one as a client and other as a server, i am testing udp load-test in these two machines.Machine Ethernet speed is 100 Mbps but i want to send 30000 packets each of 512 bytes at 1 ...
2
votes
1answer
244 views
Changing service startup order
I use wpa_supplicant to configure the wireless connection. Now I have a problem in that the network service starts before wpa_supplicant so this happens:
Bringing up interface wlan0:
Determining IP ...
3
votes
2answers
225 views
Meaning of log entries from an iptables configuration
My router has Linux as its OS. The system log has a lot of rows about iptable and klogd that I don't understand, could someone explain them to me?
The iptables setup:
iptables -t nat -A PREROUTING ...
1
vote
2answers
370 views
How to tell who is connected via vnc to my machine?
How do I check how many vnc connections or different users are currently connected to my machine? Only through wireshark? And how do I kill any other users connected through vnc?
2
votes
2answers
335 views
DNS Master vs Slave and Primary vs Secondary
I'm a little confused about the difference between a "secondary name server" and a "slave name server" and a "primary name server" and a "master name server" Â
I understand that a slave name server ...
0
votes
1answer
433 views
How can I make the NetworkManager work?
I am running a version of RHCE6 on my laptop, and lately I've been trying various stuff about network configuration through command line. Last night, I tried removing the NetworkManager using "yum ...
1
vote
0answers
155 views
How can I renew lease when it kept printing eth0 lease expired x seconds ago?
My guest VM cannot get an IP address from my host.
It keeps printing:
eth0: lease expired x seconds ago
I've tried to start dhclient -r and dhclient and restart eth0 to no avail, see here for ...
2
votes
2answers
129 views
Set internet connection order or preference
I have SL 6.3 installed on two machines.
Machine A is a workstation and has two interface eth0 and wlan0. Using eth0, it is connected to Machine B (public facing server) with static IP address. Both ...
4
votes
1answer
183 views
What is “link beat”?
I have a Linux 2.6 box that uses ifplugd to bring up the network. While initialising, the logs say, "Initialisation complete. Link beat not detected." and then it goes into releasing the present ...
7
votes
2answers
689 views
How do I find the process generating a lot of network traffic?
My machine is generating a lot of network traffic, all from the same source port, with many different destinations (found this out by running iftop -P, and from my router's logs).
How do I find the ...
0
votes
0answers
267 views
Changes made to ifcfg-wlan0 doesn't seem to make a difference
I am running RHEL6 on my laptop. The wireless adapter configuration file ifcfg-wlan0 didn't come by default under /etc/sysconfig/network-scripts. So I created it myself. The problem is, whatever ...
2
votes
1answer
197 views
Configuring Wireless Network
After a long struggle I finally seem to have installed the non-free wireless firmware for my wireless NIC. I'm trying to set up a file server, so I want to configure the network to be static. Would ...
3
votes
2answers
1k views
Driver for Intel 2200BG wireless network card
I'm trying to make work my wireless network card Intel 2200BG in my laptop Acer Travelmate 4002WLMI.
I tried so far:
$ sudo lshw -C network
*-network:1
description: Wireless interface
...
2
votes
1answer
323 views
nsswitch.conf versus host.conf
Suppose that /etc/nsswitch.conf file contains
hosts: files dns
and /etc/host.conf file has
order bind,hosts
then in which order the system would use /etc/hosts and DNS look-up to resolve a host ...
2
votes
2answers
1k views
Where could I find the ifcfg-eth0 file?
I am using RHEL6, but I could not find the Ethernet interface configuration file ifcfg-eth0 under /etc/sysconfig/network-scripts. Issuing ifconfig -a shows that eth0 does exist. Could it be that the ...
1
vote
1answer
991 views
What is the difference between virbr# and vnet#?
I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
1
vote
1answer
408 views
Network Interface Names output from ifconfig
So this has been driving me nuts for a good couple of hours, so I thought I'd ask about it here (let me know if there's a better forum for this question).
I have a CentOS Virtual Machine on ESXi. I ...
1
vote
0answers
101 views
Unable to access internet if wireless enabled
The following is my route output. eth0 is my wired network and eth1 is my wireless network. Only wired one has access to internet. If I enable wireless, I am not able to access internet, it tries to ...
2
votes
0answers
256 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 ...
1
vote
2answers
659 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
vote
1answer
127 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
vote
1answer
163 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
vote
1answer
287 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
votes
1answer
236 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 ...
0
votes
0answers
101 views
Apache webserver DNS Configuration [duplicate]
I've configured Apache web server and I've mapped my IP to some web address (like www.webaddress.com) and put the entries in /etc/hosts file also. Now I want to access the same www.webaddress.com from ...
6
votes
0answers
148 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 ...
1
vote
1answer
276 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
votes
1answer
225 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
votes
2answers
74 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 ...
1
vote
3answers
167 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 ...
1
vote
1answer
469 views
Redirect Output with Iptables
Is possible on Debian change the port of packets that going to a specific port, using iptables?
Example:
I want packets going out the direction a.b.c.d for port 1723 to be redirected to the address ...
