Networking :: Getting IP From Plugged In Devices
Jan 3, 2010
I know pretty nothing about networking'n'stuff. I got this linksys wireless router that was somewhere in a box for a few years ... now I want to see whether I can bring it back to life. I know, that I put some different software on it and that it doesn't have it's original ip assigned any more. But I can't remember which ip that would be.
So for starters I just wanted to put the original software back on to see if that thing still works. But how to do that? First I got no clue how to determine the address it is listening to. Once that'd be figured out I guess I'd have to ssh to it and install this ____.bin file I downloaded somehow.
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Aug 21, 2009
I know in windows xp there is a registry key and an entry in the Plug and Play log file as well as maybe an event id, that is produced when a device (say usb) is plugged in. My question is, besides /var/log/ (messages?) Is there any other location that that information is stored in?
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Jan 25, 2010
When I plug in a USB GPS device, using cypress_m8 module, is creates /dev/ttyUSB0 with read/write permissions for owner,root, and group, dialout. My question is really just where are the rules for setting these permissions and how exactly are the owner and group names set when /dev/ttyUSB0 is created, i.e. a serial USB device is plugged in.
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May 26, 2009
I want the following behavior in kubuntu 9.04 when I plug a device (USB stick or CD disk):
1. It should be mounted automatically for me. Now it isn't, though it appears in fdisk -l output: Code: Disk /dev/sdd: 8006 MB, 8006926336 bytes
16 heads, 32 sectors/track, 30544 cylinders
Units = cylinders of 512 * 512 = 262144 bytes
Disk identifier: 0x9b12d290
Device Boot Start End Blocks Id System
/dev/sdd1 * 16 30544 7815232 b W95 FAT32 and if I mount it manually, all goes OK
2. If I mount manually my CD disk and then press the eject button on my drive nothing happens until I manually unmount the drive. But I want it to open immediately
All this worked for me in kubuntu 8.10, and broke with the upgrade.
My fstab entries Code: /dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/sdc1 /media/usb vfat noexec,codepage=866,utf8,nosuid,nodev,quiet,uid=1000,gid=1000,umask=077,user 0 0
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Dec 23, 2009
I am working on h/w device having linux kernel version 2.6.27 with busybox installed. I observed below problems while working on jffs2 image is flashed on the board.
1)When the board is powered-up with n/w cable is connected, it doesn't get IP address automatically, I have to use "/etc/init.d/networking restart" in init script(/etc/init.d/rcS) to get the IP address.(I am using dynamic addressing)
2)When the board is powered-up with n/w cable is unplugged and plugging-in once the device is started, I get "link up" message from the system, but still the IP is missing in eth0 interface.
I have udhcpc(v1.14.1) installed. Giving below commands manually, get the IP for device:
Code:
ifdown eth0
/etc/init.d/networking restart
but It is not pretty solution for me !
What I want is, the device should get IP address automatically once the n/w cable is plugged-in. (as we get in desktop m/c's). Am I missing some scripts or configuration parameters?
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Apr 25, 2009
I was recently asked to get a 3G ZTE 633 modem (not in stores) to connect to the internet whenever it was plugged in. I had it successfully working on my Ubuntu Gutsy Gibbon machine but it does not work on Fedora 10 which is where it is required to work. When the 3G modem is plugged in I use a Udev rule to run usb_modeswitch which changes it from being in usb storage mode to being in modem mode. This part works fine. I then run a second udev rule (on the modem device), this should run a script which connects to the internet. Unfortunately it falls over here. The script does run but it will not connect. However if I run the script manually from root it works fine. I guess that it is a permissions issue.
The device permissions are:
crw-rw---- 1 root uucp 188, 0 2009-04-26 11:31 ttyUSB0
crw-rw---- 1 root uucp 188, 1 2009-04-26 11:31 ttyUSB1
crw-rw---- 1 root uucp 188, 2 2009-04-26 11:31 ttyUSB2
The script and script folders permissions are:
drwxrwxrwx 2 root root 4.0K 2009-04-26 11:46 .
drwxr-xr-x 23 root root 4.0K 2009-04-26 11:13 ..
-rwxr-xr-x 1 root root 95 2009-04-26 11:46 run_internet
One thing to note is that there are three udev devices associated with the modem. They are ttyUSB0, ttyUSB1 and ttyUSB2. I use ttyUSB2 to talk to the modem when connecting. Here are the files. If you require any more let me know:
The first udev rule:
SUBSYSTEM=="usb", SYSFS{idProduct}=="2000", SYSFS{idVendor}=="19d2", RUN+="/usr/bin/usb_modeswitch"
The second udev rule:
SUBSYSTEM=="usb", SYSFS{idProduct}=="0031", SYSFS{idVendor}=="19d2", MODE="0666", RUN+="/outputs/run_internet"
The script:
#!/bin/bash
/bin/echo script
/usr/bin/wvdial &
cp -f /etc/telstra_resolv.conf /etc/resolv.conf
The wvdial config file:
[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = ATS7=60 S30=0 S0=0
Init4 = AT+CGDCONT=1,"IP","telstra.internet"
Modem Type = Analog Modem
Baud = 9600
New PPPD = no
Modem = /dev/ttyUSB2
ISDN = 0
Dial Command=ATD
Phone = *99#
Password = user@bigpond.com
Username = password
Stupid Mode = 1
So what am I missing? I suppose it is related to device permissions. Why does the "mode" command not work? With what rights do udev rules run?
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Aug 15, 2010
I want t understand why my 3G modem work only when it's plugged when my computer boot. If I forget to plug it , I need to restart my machine to get it working. I'm using ubuntu 10.04 when I plug the modem during the boot I get the product id changed from 1446 to 141b and dmesg |grep tty show me that the modem attached to ttyusb0 and ttyusb1 when I plug it after the startup I get also the product id changed from 1446 to 141b but dmesg |grep tty show me nothing.
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Dec 15, 2010
I've got a telstra MF 636 modem that I've been trying to make work in Ubuntu 10.10.
Telstra have the modem report itself as a CD when it is first plugged in, but I've found out how to get around that using the terminal in the telstra software.
Anyway, my problem is that the computer will not recognise that the modem is plugged in. lsusb reports it as there, but the access point does not appear under the network icon 99 percent of the time. On the rare occasion it does, I click it, and it tries to connect, with the little animation and all, but it just disconnects.
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Jun 5, 2010
I have I fileserver on my home network. It has a static IP and is plugged into the back of the wireless router. It is fine on the network but cannot access the internet. I noticed this when I was trying to update my package list. This is what is in /network/ interfaces:
auto eth0
iface eth0 inet static
address 192.168.2.100
netmask 255.255.255.0
network 192.168.2.1
broadcast 192.168.2.255
gateway 192.168.2.1
[Code]...
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May 5, 2010
I have been encountering this problem, not only on 10.4, but on older versions too: I use a wifi router to connect my laptop to the Internet, but sometimes I need to connect directly to another computer to move some files over GLAN. But Ubuntu's Network manager doesn't allow me to configure the eth0 interface without specifying a gateway (no gateway = grey submit button), but when a gateway is specified, it always rewrites the default gw specified already by the active wifi connection and returns back after unplugging the eth cable.
Of course this can be solved by a few route commands, but this is unacceptable since it is needed to establish the cable connection without any further assistance from within and as well without replacing the default gw and thus breaking the Internet connection. Is there, please, any possibility how to prevent Network Manager from replacing these routes?
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Jan 19, 2010
For about the past month I have been having a very frustrating problem When I boot the system with the ethernet cable attached it acts as if the cable is unplugged even though the connection light is litWhen I boot the system with the ethernet cable disconnected and wait until it boots all the way to gnome and then plug in the cable everything works fine
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Jul 15, 2011
Acer 5250-BZ475 laptop, fresh install of Ubuntu 11.04. Boots up beautifully as long as an ethernet cable is plugged in. Otherwise, I get to the login screen and have just enough time to start typing in my password before the entire system hangs hard - no mouse, no keyboard, can't even get to a terminal, nothing. Have to hard power off the machine.
It seems to be a problem with the wireless card trying to initialize, but there doesn't seem to be a bios option to disable wireless on this laptop, so I'm a bit at a loss as to how to fix this problem. By the way, wireless works fine if I boot up with a cable connected - I can see all the wireless access points in my area no problem. I just can't boot without a wired connection, which makes my laptop more or less useless when I'm away from home with it.
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Jul 28, 2010
What I am trying to do is the following: I have many IBM MT-M 6223 towers (Intel Xeon processor) that need to run a certain Fedora 9 configuration. It is working on one box, now it needs to be replicated on all of the others. What is being done is the working box is cloned, and then that image is loaded on all of the others.These boxes have 5 total Ethernet devices. There is one on-board port, and there are two 2-port expansion cards for a total of 5.
There was one initial problem out of the gate that has since been solved (or perhaps not completely). What was happening is that the boxes that received the cloned image had their Ethernet devices misnumbered. Instead of eth0 through eth4, they were numbered eth5 through eth9.This was eventually traced to the following file: /etc/udev/rules.d/70-persistent-net-config. That file contained the original settings from the box that was first cloned. It had eth0 through eth4 at the top with MAC addresses belonging the box that was the source of the cloned image. It looks like this mismatch was detected, and five more entries, numbered eth5 through eth9, got appended to the bottom with MAC addresses belonging to the new box.
Once /etc/udev/rules.d/70-persistent-net-config was deleted, and the machine rebooted, the 5 ethernet devices came up with the correct numbering (0 thru 4). /etc/udev/rules.d/70-persistent-net-config was rebuilt with the correct devname-MAC pairing.
Now for this new problem.... Part of the configuration across all these machines is that only eth3 should have an IP address. It is a static IP address set through the /etc/sysconfig/network-scripts/ifcfg-eth3 file. All of the other devices must NOT have any IP address. They are either not used or used only for raw Ethernet.After clearing out /etc/udev/rules.d/70-persistent-net-config, /etc/sysconfig/network-scripts/ifcfg-eth3 was edited to give the new box its own unique static IP address before rebooting.Sample ifcfg-eth3 file:
Code:
DEVICE=eth3
BOOTPROTO=static
[code]....
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Nov 17, 2010
I'm looking for some help on how to troubleshoot the network on Ubuntu 10.04 64 Desktop. It's on a Acer Aspire 721. There's a wireless card but the widget in the top right says there is no network device.
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Jun 6, 2011
Just built a box and once 10.04.2 64 bit was all installed and loaded up I realized instead of showing my Ethernet as connected it had the ol x. So when I clicked on it I got "No network devices available." The mainboard is an Asrock 890GX Pro3, link light completely out.
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Jul 27, 2011
How can I login to some devices that are behind my Server?
My topology is:
So, what I need is to access these VOIP ATA's web interfaces using port forward not using PPTP connections.
Example:
x.x.x.x:2020 ===>> VOIP ATA1
x.x.x.x:2021 ===>> VOIP ATA2
x.x.x.x:2022 ===>> VOIP ATA3
Where x.x.x.x == >> Static Real WAN IP
VOIP ATA1 IP == >> 10.10.10.47
VOIP ATA2 IP == >> 10.10.10.48
VOIP ATA3 IP == >> 10.10.10.49
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Mar 31, 2010
How can I find all the devices(printers,etc...) and computers along with their OS if any installed that are connected in my intranet (devices/computers may be down here)?
I did this earlier using netstat or nmap not sure what I used and how I did.
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Jan 14, 2011
It's installed as a mobile broadband connection. Only works if my phone is plugged in during boot, otherwise plugging in my phone does nothing. For example, I booted my netbook earlier today but my phone wasn't plugged in. Tethering did not work, it just acts as if it isn't present. I rebooted (with my phone still attached) and now tethering magically works.
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Nov 5, 2010
have problems with my Intel 82566MM gigabit NIC. Using the default e1000e module. The module finds and load the nic but it doesn't recognize that i have plugged in cable or not. It always says "cable not plugged in". Using xubuntu now but same problem with regular ubuntu not that i think it matters. I tried downloading and installing e1000 from Intel but it doesn't seem to find the nic at all.
Any suggestions how to work this out? My googling says others too have had problems with this card. Couldn't find any real working solution though. Its Lenovo Thinkpad T61 laptop. Using 10.10 Maverick btw.
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May 18, 2010
Just wondering if there is a way to view all connected devices on my network?? Something similar to view network map in vista?? I know the places network but that only shows me my shares and I want to be able to see everything that is on there ie printers, routers, VOIP, other non-shared computers, etc...
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May 30, 2010
In my home network, My Ubuntu 10.04 LTS (fully up to date) is having trouble being able to ping other computers by their computer names instead of by their IP#s. I've checked over the settings of the router (D-Link that provides wired and wireless connectivity, DNS, Gateway, etc.) and I'm pretty sure it is set correctly. My Ubuntu system is a dual-boot (Ubuntu and XP), the other computers are all XP except for one which is running Windows 2000 Pro. All the other computers are able to ping each other by name, and can ping this one by name when it's in XP or when it's in Ubuntu.
But this computer (when in Ubuntu) cannot seem to ping the other computers by name. Some it can be pinged by name from the Ubuntu system if I include the .local to the name, but others do not. I have checked and compared the network settings on each of the computers to make sure they were set identically (only the computer name is different). All of the XP systems are DHCP configured, The Win2000 is set static and is also reserved at the router. NONE of them have any of the computers listed in a hosts file. I want to avoid editing hosts files if I can.
There are seven computers in all. Only the Ubuntu has difficulty pinging other computers by name. What should I check? What can I set? I would like to know what it is that I'm missing.
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Jun 3, 2010
I'm trying to set my network interfaces so that they don't get random every boot.(eg assign eth0 to a network interface with a given MAC addr, and eth1 to the other one)I trew in a udev rule (in fact just modified the rules that was automatically generated and set the ethX in it) but the system ignores my udev rule.What am I missing ?Here is all the info :
Code:
$cat /etc/udev/rules.d/70-persistent-net.rules
# This file maintains persistent names for network interfaces.
[code]....
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Mar 31, 2010
I did a forum search and too much came up that was not the answer I was looking for. I have only Linux devices at work and I was wondering how do Linux Administrators connect to Cisco devices via serial console cable. Cisco recommends 'Hyper Terminal' which was a Windows add-on applications licensed to XP. I think Vista and 7 no longer have the license to use Hyper Terminal. Regardless I don't have any versions of Windows and would like to use a serial cable from Com port 1 to the console port on the device. I can't use SSH since some devices don't support SSH and or I have to do a password recovery.
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Jun 23, 2011
I'm doing a few tests with fedora 15. I'm surprised because they changed the naming way on network devices. eth0 is now called em1.At every fedora I have found the configuration files in /etc/sysconfig/network-scripts, but today I can't find them.
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Apr 7, 2011
To use my home broadband, I am connected to a wireless router. How can I scan for other devices connected to that router? I am using Ubuntu 10.10.Is there both a GUI and CLI method?The IP of my router is URL... Please rename this thread title from 'How can I scan for other devices connected to that router?' to 'How can I scan for other devices connected to my router?
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Jul 1, 2010
i've put together a slackware box that acts as a "virtual web" to answer pings from devices that ping various pages (such as www.yahoo.com) to test their connectivity. this is for bench testing the devices to verify such complaints as "cannot connect to the internet" or "fails connectivity test". so far, so good, except for a few devices that seem to be also try to load a particular page wirh an embedded browser. this i need help with. currently, all that's needed to return a ping is to look at the DNS requests the device makes and add the requested web address (www.yahoo.com for instance) to the hosts file. what i need is a redirect to a particular html file based on the address requested (i.e. yahoopage.html for www.yahoo.com, lgepage.html for www.lge.com, etc) any deas on how to accomplish this?
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May 6, 2009
Right now I have this error
On my top right hand corner. No network devices available.
My distro is Centos 5.3
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Nov 6, 2010
I`ve boot my laptop by centos. then my devices cant be found.
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Dec 4, 2010
Does anyone know of an application that continually scans for devices on a network and notifies you if a device connects/disconnects to/from the network? I just want a way of knowing when a computer is connected and when it's not.
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Jan 14, 2010
I've got a co-worker who is trying to connect multiple devices to his wireless router - Xbox, Wii, TV, Dishnetwork box, etc. Not all of the devices are wireless however. He's had several thoughts on how to get this done and I know very little about this kind of thing so I thought I'd ask some of you.
His first thought was to buy a multi port bridge, but he doesn't like any of the ones he's seen so far.The other thought was to connect all of the devices to a switch and then use a single bridge, but he isn't sure if this would work.
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