Ubuntu Networking :: Udev Rule Is Ignored For Eth Devices?

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 :

$cat /etc/udev/rules.d/70-persistent-net.rules
# This file maintains persistent names for network interfaces.


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Networking :: Bind The Devices To Specific Rfcomm Interfaces Via Udev?

May 8, 2010

# rfcomm -a
rfcomm0: 00:1A:89:09:8C:77 channel 1 clean
rfcomm1: 00:07:E0:2E:99:43 channel 3 clean
Then I connect by the mobile, and:
# rfcomm -a
rfcomm0: 00:1A:89:09:8C:77 channel 1 clean
rfcomm1: 00:07:E0:2E:99:43 channel 3 clean
rfcomm2: 00:1BC:0F:5C:AB -> 00:07:E0:2E:99:43 channel 1 connected [reuse-dlc release-on-hup tty-attached]

What the heck is that rfcomm2, when that mobile is bound to rfcomm1? Is it udev that makes fun of me? If so, how to bind the devices to specific rfcomm interfaces via udev?


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Ubuntu :: Write A Udev Rule For Headset

May 23, 2010

I am trying to write a udev rule for my headset but i don't understand where i get the information to make the rule. I know i need to add

Code: RUN+="bash /home/luke-jennings/headset" at the end of it so the script i wrote runs. I don't know how to get any of the identifying info for the headset and which bits to use where. How do I get the information?

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Ubuntu :: Udev Triggers Add-rule Multiple Times?

May 2, 2011

On Ubuntu 10.04 I would like to setup udev to execute a backup script when a specific USB drive is inserted. Udev detects the USB drive, but my script is executed 7 times instead of just once. Can't figure out what's wrong.

My udev rules file:

/etc/udev/rules.d# cat 20-stick.rules
ACTION=="add", ATTRS{vendor}=="Kingston", ATTRS{model}=="DataTraveler G2 ", RUN="/usr/local/bin/sync.sh"
Dummy backup script: connecting USB drive results in 7 times date written to /tmp/test

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General :: Script In Udev Rule Doesn't Run?

Jan 13, 2010

I'm running Ubuntu 9.10 (Karmic Koala) on a laptop and would like NumLock to automatically toggle depending on whether my USB keyboard is plugged in (numlock on) or unplugged (numlock off).

To accomplish this, I first installed the "numlockx" package. numlockx on and numlockx off works fine.

To hook into the device system, I thought I'd use udev. I have read "Writing udev rules", but I'm having trouble getting the udev rule to work.

First, here's an example of the dmesg output:

[20906.985102] usb 3-2: new low speed USB device using uhci_hcd and address 6
[20907.166403] usb 3-2: configuration #1 chosen from 1 choice
[20907.192904] input: Microsoft Natural® Ergonomic Keyboard 4000 as /devices/pci0000:00/0000:00:1a.0/usb3/3-2/3-2:1.0/input/input20
[20907.193100] microsoft 0003:045E:00DB.000B: input,hidraw1: USB HID v1.11


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General :: Udev Rule To Invoke A Script?

Mar 29, 2011

I am not good at writing udev rules. I am using RHEL 4.7, I would like to invoke a file install.sh which is in CDROM as soon as the CDROM is inserted

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Software :: UDEV Rule Not Running A Command?

Aug 1, 2010

I have a UDEV rule below that maps a symlink from a specific usb device and 'Should' run a command.



The symlink part is fine but it does not appear to run the command when I plug the device in. I can run the command "/usr/local/bin/my_command" from the shell fine.


mount /dev/myusbstick_1 /media/TMPUSB && cryptsetup luksOpen /dev/md5 md5_crypt --key-file=/media/TMPUSB/key && vgscan && vgchange -ay && mount -a && umount /media/TMPUSB

What am I missing. I have tried +x in owner,group and other.By the way what does UDEV run as, I assumned +x on ROOT as that is the owner should be enough.

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Hardware :: Creating An Udev Rule Mounting All Usb Drive As 666?

May 12, 2010

i need all my /media/* newly created by insertion of usb drives, chmodded 666.I tried some tips using various threads, but i failed.I'm on Slack 64 13.0.

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Software :: Udev Rule Fails When Symlink Is Defined?

Sep 19, 2010

I'm having some trouble with udev, in that it won't create me a symlink for the infrared device which is part of my Hauppauge Nova-TD-500 TV card.I've got the card installed, and for the most part working, but I want to have the infrared device on /dev/ir.I've created a rule in /etc/udev/rules.d/ called 55-dvb_usb_dib0700-ir.rules which contains this:

SUBSYSTEM=="input", ATTR{name}=="IR-receiver inside an USB DVB receiver", RUN="/bin/date > /home/xbmc/foo", SYMLINK+="ir"


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Slackware :: Udev Rule Not Starting Gpsd During Boot?

May 29, 2011

I'm trying to configure gpsd 2.96 to start automatically from udev rule on a Slack 13.37 box.1. I've compiled and installed gpsd from sources and made sure it starts manually.2. I've copied the /lib/udev/gpsd.hotplug and /lib/udev/gpsd.hotplug.wrapper scripts in their places from the source tree and made them executable.3. I've copied the gpsd.rules file from sources into /etc/udev/rules.d4. I renamed it 99-persistent-gpsd.rules to run late in the bootup process.5. I've copied the /etc/default/gpsd file from sources and made sure it has the right settings inside.

Now, for the results. If I plug the gps usb dongle in while the system runs, it starts gpsd if it is not started, and it connects to it just as it should. But if I start the system with the dongle in, gpsd doesn't get started during boot. I can't find any relevant message in /var/log/syslog or /var/log/messages for boot time. There is stuff there from when I plug the dongle in while the system is running though. It's like udev ignores the rules for it at boot time.Is there something in the Slackware boot scripts that would prevent running those scriptssd.hotplug.wrapper which in turn runs /lib/udev/gpsd.hotplug which is a Python script)?Here is the contents of 99-persistent-gpsd.rules (ignore the comments referring to Debian, it was meant for a Debian box). My usb gps adapter is the first one - the Prolific chipset one:

# udev rules for gpsd
# $Id: gpsd.rules 5861 2009-08-03 13:41:01Z bzed $


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Ubuntu :: Create An Udev Rule To Stop Card Reader From Being Initialized

Jan 24, 2010

I have a netbook (MSI Wind U100 rebrand) that has one of those card readers built into the handrest. The thing is I've never used it once, and it keeps popping up in powertop as waking the cpu when it should just shut up and be quiet.Aside from breaking open the case and tearing it out, the immediate solution is to browse to /sys/bus/usb/devices/usb1/1-6/ and pipe 1 to the file remove. That disables it until system reboot or resume, at which point I have to do it all over again.


$ echo 1 | sudo tee /sys/bus/usb/devices/usb1/1-6/remove

Now I'd like to create an udev rule to make it not get initialized at all. A quick Google search found me this article on creating udev rules, and after toying about with the udevadm tool I managed to produce the attributes/properties of the device.


zorael@lethe:/sys/bus/usb/devices/usb1/1-6$ udevadm info -a -p $(pwd)

Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device.

looking at device '/bus/usb/devices/usb1/1-6':

ATTR{configuration}=="CARD READER


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Debian Configuration :: Creating Udev Rule For Specific SATA Port

Apr 19, 2011

I have a trayless SATA hotswap bay that is really terrific for quickly attaching and removing SATA hard drives. I'm trying to write a udev rule to create a symbolic link to the device node for the drive that is attached through the hotswap bay (/dev/bay -> /dev/sdX). This eliminates any ambiguity when performing destructive tasks (fdisk, etc). I'm running squeeze amd64. I've read through several tutorials and have it working somewhat. Here's the output of udevadm info for a drive attached via the hotswap bay.

looking at device '/devices/pci0000:00/0000:00:11.0/host7/target7:0:0/7:0:0:0/block/sdb':
ATTR{capability}=="52" ....

Here is my udev rule
DEVPATH=="/devices/pci0000:00/0000:00:11.0/host7/*", SUBSYSTEM=="block", SYMLINK+="bay%n"

This produces the desired behavior and gives me an fdisk-able device node. The problem I am having is that the "host" component of the DEVPATH varies from bootup to bootup. I'm just using on onboard SATA, host2-7, specifically host7. There is also onboard PATA, host0-1. It seems to just be random which "host"s are assigned to which controller. For example, the next time I boot the system, the onboard SATA will be host0-5 and the onboard PATA will be host6-7. In this simple case, I could just write 2 rules, one for each possibility and it would still be correct because of the different PCI addresses of the two controllers. But on systems with more SCSI (uh... libata, actually) controllers, a "host" file can point to different physical ports between bootstraps. This would be bad. Does anyone know of a way to write a rule to tie a device node to a specific physical SATA port on the motherboard/hba?

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Ubuntu Servers :: Using Identical Devices With Udev?

Jan 12, 2010

I have two identical hard drives; same make, same manufacturer, same model, and same capacity, which I'm trying to run in a RAID1 mirroring scheme. The problem: configuration files for md arrays only lets me use device names, such as /dev/sdb and /dev/sdc. To keep these the same (and in the same order) when I boot I wanted to write a udev rule for them. Unfortunately, I have no way to differentiate between these two drives, as they seem to be identical. Normal methods of differentiating by size or model name wont work. I think I can use UUIDs; but I neither know how to get the UUID of a device/partition, nor do I know how to use it (if it is possible) in a udev rule.


udevadm info --query=all --path=/sys/block/sdb # or whatever block dev

Look for and use "ID_SERIAL_SHORT" which is unique even for identically manufactured disks. Write a udev rule based on this property.

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Ubuntu Security :: Set A Rule In Iptables, Does That Rule Also Apply To Ipv6, Or Just Ipv4?

Jul 16, 2010

Question (and Google results aren't making this clear): Ubuntu has both iptables & ip6tables installed. 1. If I set a rule in iptables, does that rule also apply to ipv6, or just ipv4?

2. If "no" to above, then it would be prudent to *also* set ip6tables rules as well if I want to maintain an active firewall, correct?

3. Does ip6tables rules have the same syntax and behavior (more or less) to iptables rules - i.e. can I just copy my iptables rules & change "iptables" to "ip6tables"?

4. Any gotchas or issues that I should be aware of?

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Ubuntu Networking :: Ufw Blocking RST Packets When Rule Show Allow It?

Aug 30, 2010

I've setup ufw rules on my system but noticed that the rule i created to allow traffic from my local network is still dropping some RST packets.here's part of the output of dmesg

[43627.361500] [UFW BLOCK] IN=wlan0 OUT= MAC=00:16:ea:03:9c:3a:00:1f:a7:3d:d5:eb:08:00 SRC= DST= LEN=40 TOS=0x00 PREC=0x00 TTL=64 ID=2210 PROTO=TCP SPT=59521 DPT=9000 WINDOW=0 RES=0x00 RST URGP=0


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Networking :: Add The Rtp Protocol To Iptables Rule?

Jul 29, 2009

i'm new in linux world i would like to know how can i add the rtp protocol to my iptables rule for Netfilter firewall,but without installing the asterisk server

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Networking :: How Many Rule Iptable Can Manage

May 12, 2010

i'd like to know how many rule can manage iptable. I'm asking that because i'd to drop all traffric from my localnet to porn site. I've a database of porn site witch contain about 900 000 domains. I know there are solutions like squidguard. But for my linux box i'd to use iptable to prevent users access to porn site and other blacklist site.

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Networking :: IPTables Rule For Outgoing?

Dec 7, 2010

Unsure about IP tables lingo, so excuse me for not looking this up:I have a server, running IP tables, that I do not want to allow any type of outgoing traffic to

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Networking :: Adding An Additional Iptable Rule?

Mar 4, 2011

This is what I have currently running.


iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT


How do I add this to the ruleset, without doing the whole thing over again?


iptables -A OUTPUT -d -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

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Networking :: Rule To Access Application Server

Aug 25, 2010

I have 2 LANs in my network. They are:
LAN 1:
LAN 2:
Both LANs, communicate with each other. And both have an application server. In LAN1, I can access the web server, internal and external. At LAN2, only works on the internal network.The rule that I'm using is as follows: iptables -t nat -A PREROUTING -p tcp -d my_ip --dport 80 -j DNAT --to

This rule works for LAN1, but not for LAN2. Anyone know what that is can be lockin access?

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CentOS 5 Networking :: Large Iptables Rule Set?

Jan 10, 2011

Loaded up Centos 5.5 final. Configured iptables to block regions of the world based on networks. An example would be:


My /etc/sysconfig/iptables file contains about 10k entries like this. If I use this, the machine lags hardcore network wise.

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Ubuntu Networking :: IPtables NAT Rule Setup - Unknown Symbol In Module

Nov 16, 2010

Trying to setup my box as a router on Ubuntu 10.04. When trying to setup a NAT rule in iptables 1.4.4 like so:

sudo iptables --table NAT --append POSTROUTING -o eth0 -j MASQUERADE
I keep getting:

Can't initialize iptables table 'NAT': Table does not exist (do you need to insmod?)

Looking at lsmod, it doesn't look like I have anything NAT related loaded ( I just have iptable_filter, ip_tables, and x_table ). Doing a locate nat, I find a module that looks like it should work. I'm running 10.04.1 LTS - Kernel is 2.6.32-25-generic #45-Ubuntu SMP and it is pretty much stock - haven't done anything fancy... this module looks promising:

but loading it and I get:

-1 Unknown symbol in module

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Networking :: IPTABLES: Two Unrelated Source IPs In A Single Rule?

May 18, 2010

This isn't exactly of critical importance, but is there any way to block two entirely different addresses in the one rule, rather than writing individual rules for each of them? For example, if the addresses were and, and I only wanted to block these two.

Or alternatively, if I wanted to block two subnets, say and Can this be done in one rule?

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Networking :: IPF Pass In Connection To Port 21 Even With No Explicit Rule?

May 26, 2010

I'm running IPF on solaris 10 Note :i believe the idea will be the same it doesn't matter either its linux or solaris

bash-3.00# ipf -V #display ipf version
ipf: IP Filter: v4.1.9 (592)


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Networking :: Iptables Rule To Accept All Connection From Program

Oct 29, 2010

my iptables Policy is Drop..my server ports is open just for httpd,ssh .Is there any rule which can allow all connection from a specific program for ex. i want to scan an ip Address ports.as you know nmap connect to every known port to see if that is open or not so, if i want to allow nmap to connect, i need to include all ports for that, or i can allow connection from localhost to outside in all ports .my server is very secure . i dont want other programs (probably a backdoor) use those ports to connect outside i want to know is there any ability in iptables which can rule connections by name of program like "Allow any Connection from /usr/bin/nmap to everywhere " ?

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Networking :: Ubuntu 10.04 Ignores Eth Udev Rules

Jan 6, 2011

For some reason, Ubuntu keeps assigning my network interface wrong MAC address. This happens only after fresh boot (I have dual boot with WinXP, if I start Windows first and then restart to Ubuntu without switching computer off, the MAC is correct). Contents of /etc/udev/rules.d/70-persistent-net.rules:


# PCI device 0x10ec:0x8136 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:22:19:ef:1c:3d", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x168c:0x001c (ath5k_pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:17:c4:78:f4:f8", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"


EDIT: I made a workaround by adding


auto eth0
iface eth0 inet dhcp
hwaddress ether 00:f3:f5:ef:fe:56

to /etc/network/interfaces and it works. However, I'd still like to know why Ubuntu ignores my udev rules, regardless whether the workaround happens to work or not...

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Networking :: Iptable Rule For Blocking Direct Internet Access

Jun 13, 2010

i have the following system in my lan.

etho(private) -
eth1(public) -

squid server at

my request is that i have to make all out bound internet connection should go from proxy server , not directly to firewall. Please specify a iptable rule for blocking direct internet access. my clients ip ranges from to

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CentOS 5 Networking :: IPTABLES - Should This Rule Take Care Of Port 5090?

Jun 6, 2010

I am new to iptables. The setup tool on a VPS doesn't work. So, I am learning to insert rules. I have inserted so many and some of them show as duplicates now.

1- I want to know how to remove the duplicates. Is there a file that these rules are store in so I can go in and easily edit it?

2- Is there any other utility that handles firewall in Linux that I am unaware of? or is the iptables the ultimate door guard? This is a plain install of CentOS.

3- Since I believe I opened port 5090 but I think it still might be blocked, could SELINUX be the problem? How can I get my way around setting it to permissive or disable if I don't have access to "setup" command?

4- What is the order of iptables reading? does rule #1 supersede all other rules? or does the last rule supersede all rules prior to it?

5- Do the rules below make a fairly safe system? (except for the duplicates which should be remove) I understand that a safe system is dependent also on the applications that are allowed in this category and I am not talking about those. I am talking about dropping all other inquiries and in general is this how iptables are setup? This is what I currently have:

[root@tel ~]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination


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Networking :: Udev Failure With Multiple Interfaces

Jan 7, 2011

I have got a problem in the configuration of the network for my Linux box. The distribution is Slackware 12.2 with the kernel. There are three ethernet NIC, one on the motherboard with Atheros AR8121/AR8113 chip and two on PCI card which with RealTek 8169.
I installed the module for Atheros which is the atl1e.ko and I defined the configuration for the three NICs in /etc/rc.d/rc.inet1.conf.
When I hit the commend ifconfig I see all the three interfaces eth0, eth1, and eth2, but the address are not distributed between the NICs as I'd like so I thought to resolve the inconvience with udev, but I don't know how to proceed because there is a strange situation.

If I control the file /etc/udev/rules.d/70-persistent-net.rules I see a strange situation: Once the file contains nonly a line for the Atheros NIC but if I reboot the system there are the two lines for the two RealTek NICs and everytime the system is rebooted there is a change between these two alternatives. A detail I noted is that the two modules atl1e and r8169 are both always loaded, so udev has always the chance to detect the hardware but for some reason that I don't know something goes wrong. Another related problem that bothers me is the absence of udevinfo and udevtest. Have I perhaps to reinstall udev?

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CentOS 5 Networking :: NIC Alias Rename Using Udev?

Feb 16, 2009

I'm trying to arrange my 4 NIC's on CentOS 5. Two of them are build-in motherboard nic's and the others are PCI-E Dual Intel card. I'm wondering if someone succeed with udev renaming rule based on BUS location like ID=="0000:03:00.0" ... etc

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