Fedora Networking :: Bridged Networking Unreliable In VM's ?

Oct 1, 2010

I've got a Fedora 13 box running a bunch of VM's w/ bridged networking.

For some reason, every 10-15 minutes the vm's networking freezes and the vm's become unresponsive to pings and any other network traffic for 10-15 seconds. It eventually gets restored.

I don't see any error messages other than this occasionally on the host: eth0: received packet with own address as source address

Here's the two interface configs:

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Fedora Networking :: Slow And Unreliable Wireless Connection When Using WPA Encryption On F11

Jul 21, 2009

on my laptop (dell d620) when I try to connect to wpa networks I get frequent disconnections and very slow speed.

My network card is: 0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

Insted when I use connetion whitout wpa encyption I've no problems...

how to configure iwl3945 to get decent performance on wpa networks ?

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Fedora Networking :: Bridged Networking And NetworkManager - No Network Connection Because Network Isn't Managed

Mar 2, 2011

I have installed qemu/kvm and created a Bridged network connection which works just fine(Windows 7 VM won't work in NAT mode.)

But when I try to use NetworkManager it says that I have no network connection because the network isn't managed, (I set the settings in ifcfg-br0 and ifcfg-eth0 to be managed)

The real problem is that now I can't use my VPN connections (I have many) in NetworkManager.

Is there a way to have both of these pieces of functionality?

I am using FC14

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Fedora :: FC 13 Vmware Workstation Bridged Networking NOT Working

May 28, 2010

Im using fedora 13 x64 install from DVD. Has anyone else found problems using vmware 7.0.1 or 7.1. My bridged networking will not pickup a dhcp address, and even if I configure static my network will still not work, yet NAT works fine. Even configuring bridged to use a dedicated device doesnt work. Workstation worked fine on Fedora 12 but this seems to be a reoccuring problem in every other release.

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Fedora Networking :: Bridged Successfully But Cannot Access Internet

Aug 7, 2010

Bridged successfully but cannot access the Internet.I installed VMware in my Fc13,and installed XP sp3 in the VMware.I can access the Internet in XP,I set the network as Bridged with Fc13,but Fc cannot open a page,but I ping google.com,it can display: Code: Pinging google.com [] with 32 bytes of data:
then nothing.I still cannot access the Internet in my Fc13.

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Fedora Servers :: Bridged Networking And Virt - Manager?

Feb 1, 2011

I have been trying to set up bridged networking, but I keep failing. I am using Fedora 14 x86_64 KDE as host with qemu-kvm and SPICE. The plan is to install a windows server, a few windows clients and then rawhide as guests on that. Naturally I want to use bridged networking for the windows guests.[URL]..But those both leave the guest without internet access. Is it really this difficult, or am I doing it wrong(tm)?

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Fedora Networking :: VLAN Do Not Work Over Bonded Or Bridged Interfaces

Aug 20, 2011

I'm having trouble getting Fedora 15 to work with my em/bond/br configuration as it did in Fedora 14. I've got a bonding interface over em1 and em2, and then individual bond vlans (bond0.2, bond0.10, etc...), I then have a similarly named bridge interface (br0.2, br0.10, etc...) for kvm. Regardless of if I assign bond0.2 or br0.2 the IP address, I am unable to ping the gateway, but the native untagged VLAN (bond0, br0) has no issue at all.

To try to isolate this issue down to the switch or Fedora 15, I went with a plain em setup and configured em1, and em1.2 which works as expected. This issue has been plaguing me since Fedora 15 came out and I'm about to trash it and go back to Fedora 14 (Which didn't have this issue), but some of the new kvm features have kept me trying to get over this incomprehensible hump.

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Networking :: Wireless Connection Slow And Unreliable?

Sep 19, 2010

I just got a wireless card and I've been having connection issues under Linux. The chipset I have is a Ralink 2860 (the card itself is an Asus PCE-N13) and supports 802.11n speeds up to 300 mbps. I am connecting to a DLink DIR-655 router, which also supports 802.11n at 300 mbps. I get full bars when connecting to my router, and my router's connection information shows my computer connected as 802.11n with the signal at around 80%, but the data rate is usually around 5.5 mbps. (I've rarely seen it go up to 18 mbps) I can confirm this woefully slow speed with anything I try to do over the network. Additionally, my wireless connection will sometime be disconnected and network manager will often fail to connect. When it fails to connect, my router lists my comptuer with the correct IP address, so I know it is successfully connecting to the router and the router is accepting the connection, but network manager seems to not recognize this.

I am running Debian Squeeze (testing), but I have a custom kernel, which is 2.6.35 and is using Debian's kernel configuration. I have the newest firmware from Ralink's website, and I also tried the newest drivers, which made no difference. (I have since removed those drivers, since I'd prefer to use the drivers supplied with the kernel if possible, but I can install them again if necessary) I put this card in my main computer and booted under Windows, and it was able to connect with 100% signal (it's right next to the router) and at 300 mbps. I also tried it under Debian on my main computer (with the stock 2.6.33 kernel), but it only connected as 802.11g, and even at 100% signal it was only connected at 36 mbps. For comparison, my laptop with an 802.11g card and running Mac OS X can achieve the full 54 mbps at 84%.


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Ubuntu Networking :: Unreliable Broadcom BCM43224 Wireless?

Jun 13, 2011

I'm having all sorts of problems with my wireless connections in an HP Pavilion DM1. I'm sure it was working last week. I have two access points, one with WPA, one unsecured. It's not working with either. I can connect to both of them fine with a wifi USB adapter.

I've tried:
Using Wicd instead of networkmanager
Using the proprietary driver
Installing the linux-firmware package from Oneric (version 1.54)
Changing the frequencies the AP runs on


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Networking :: Bridged VPN With Two NICs

Jun 4, 2010

My brother has a Ubuntu server attached to a LAN with Windows PCs. I set up an openVPN tun service on the server, let's call this VPN1, so that I can connect remotely from my Ubuntu desktop. The server has one NIC and the LAN has a router that is the gateway to the internet.

My brother would like to remotely access his windows network when roaming with his Windows laptop.

Therefore, I would like to set up a second VPN service, this time tap, that is bridged with his LAN. Let's call this VPN2.

The LAN subnet is The internet gateway is

The NIC has a fixed IP set by the router of

How do I set up VPN2 so as not to trash VPN1? That is, if I bridge eth0 with tap0 how will that impact VPN1's tun0 that is using eth0? Do I need a separate NIC for the VPN2 bridge?

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Networking :: STP In Bridged Connection ?

Nov 24, 2010

I am trying to get a bridged connection to work in centos

Here is the network diagram [url]

There are two interfaces in linux system , they are bridged and connected to the windows system I am not sure if I need to enable STP in the bridge or not?

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Networking :: Bridged Interfaces In CentOS

Nov 20, 2010

I have two eth interfaces bridged in CentOS, one of these interface is connected to a Windows Server, I can do a ifconfig down on both these interfaces and there is no change of status at the windows side, I don't get the message that 'network cable has been unplugged'

Is this behavior normal ? I think when you shut an interface than you get the interface down message at other end ? And what becomes the status of the bridge if I shutdown one of its interface ?

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Ubuntu Networking :: Kubuntu 11.04/ Asus U50f/ Atheros/ Unreliable Internet?

Apr 30, 2011

Code: Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)

wlan0 IEEE 802.11bgn ESSID:"DUSTINSEE"
Mode:Managed Frequency:2.427 GHz Access Point: 00:22:2D:A2:D9:48
Bit Rate=150 Mb/s Tx-Power=13 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=62/70 Signal level=-48 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:5 Invalid misc:31 Missed beacon:0

it takes 3-4 refreshes to make a page load, when i apt-get something, my speed is an average of 400 bytes per second. Making it impossible to get anything done. its been like this for a while, i figured it was a bug in 10.10 and ignored it since 11.04 was coming soon. And with windows everything is fine. I'm getting very sick of this. Can somebody please help me? If you need more info, just let me know.

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OpenSUSE Network :: Setup Bridged Networking On 11.4 With Xen

Aug 20, 2011

Newbie Question: How do I setup networking on openSuSE 11.4 on an HP Proliant DL385 G7 with 4 NICs to host Windows 2008 R2 on Xen? I've installed openSuSE 11.4 with all the patches (and most of the server patterns - Mail and News, LAMP, LDAP, Samba, etc.), and I've installed Windows 2008 R2 in a Xen virtual machine. I'm having problems configuring the 4 NICs eth0, eth1, eth2, eth3 are "bound" without an ip_address as br0

eth0 connects to my ISP - currently through a private LAN - It connects directly to the router with static IP Eventually, one of the other NICs will serve ip_addresses via DHCP to a separate LAN (for use in an office setting), and eth0 will be set with a static IP from the ISP That means, eth0 will be static to the ISP, and the other NICs will attach to a switch serving private ip_addresses in the 192.168.0.xxx range.

Currently, I have br0 unconfigured and eth0 static. I have configured eth0 in the External Zone and br0 in the Internal Zone in the firewall, and all the correct ports are opened (afaik) I have enabled masquerading. Hostname, Domain (workgroup), DNS Server addresses and IPv4 Gateway are configured.

Windows 2008 R2 (Guest VM in Xen) "sees" the other machines on the network, and "browses" the internet, although it will not download patches except intermittently. I have not tried connecting to it from the LAN Eventually, I wish to run Windows Terminal Server. openSuSE cannot "browse" the internet, though it initially did. What am I missing? I "think" I need routing or NAT, or I may have my bridge setup incorrectly, although I've tried almost every combination. Google says Xen should be setup with either NAT or a Bridged Network.

Output of ifconfig:
br0 Link encap:Ethernet HWaddr 3C:4A:92:76:B8:F2
inet6 addr: fe80::3e4a:92ff:fe76:b8f2/64 Scope:Link
RX packets:953 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:119849 (117.0 Kb) TX bytes:368 (368.0 b)

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Ubuntu Networking :: Configuring A Bridged Connection?

Apr 22, 2010

how to configure a bridged connection in where we are required to enter username and password.I am currently using PPOE type connection of my modem(A Nokia siemens ADSL modem).

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Ubuntu Networking :: OpenVPN Routed And Bridged On The Same Server?

Mar 10, 2011

I currently have one of our clients set up to use a routed VPN for their 5 laptops to connect to the server remotley. And this works brilliantly. They are about to bring on a remote office that will need a VPN connection back to the main office, so I was going to set up a bridged connection between the two sites (and possibly more sites in the future).

So my question is whats the best way to go about this? Can I have one instance of OpenVPN running with tun0 set up for a routed connection to the laptops and add a second tun (tun1) to the config that will be for the bridged connection between the sites? Or am I going to have to run multiple instances of OpenVNP, one for the routed and another for the bridged?

If routed and bridged have to run in seperate instances, will I have to add another instance for each new remote site that needs a connection? Can a bridged config connect to multiple sites, or have multiple tuns in the one config?

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Ubuntu Networking :: Host Can't Access Gateway But VM Can With Bridged

Jun 19, 2011

I've set up bridged networking so that I can have KVM virtual machines that are accessible from outside the host. I can access both the Host and my VM from other machines on the local network, and from the VM I can access the internet but from the Host I can only access my local network. Since I can access the local network and the same issue applies regardless of whether I use host names or IP addresses I suspect it's not picking up the gateway properly.

How do I go about allowing the VM host to access the internet while still having bridged networking so I can access my VMs?

What I've checked so far:
Ping Google DNS ( )
From Host: Destination Host Unreachable
From VM: Suceeds


The issues are only with accessing things outside of my subnet. I can access other machines on the same subnet from the Host just fine.

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Ubuntu :: Virtual Box 4.0.8 - Bridged Networking Crashes Host (kernel 2.6.38-10)

Jun 19, 2011

I have an Ubuntu 10.10 host running in VirtualBox 4.0.8 r71778, and I need to setup a LDAP authentication network between two VM's: a Maverick-based distro and Ubuntu Server 11.04.

Screenshot of the two running perfectly fine:


Using NAT, I can have the two VM's up and running on VBox, but they get the same IP ( I googled it and quickly found out that I needed to change the VM's network interfaces to Bridged Networking. So I tried that. Here's two screenshots of the default configurations:

1- Ubuntu Maverick based distro:


2- And here is one of the Ubuntu Server:


(I'm Portuguese, that's why there are mixed languages in the UI)It's pretty stupid to explain like this, but whenever I try to start one of those two using Bridged Networking, I get a black screen full of errors (I can't take a printscreen of that, so I took a bunch of pictures - yeah, it's lame, I know ). Then, I have to press the power button to shut down my host, and restart the pc.Here they are:


Where I think the problem is:


My host is currently running Linux kernel 2.6.38-10.I have dkms, linux-header-generic and build-essentials installed (and the VB extension package too)And my host is a laptop, connecting to the internet using the router my ISP provided me.How can I solve this? Is this some kind of bug regarding 2.6.38-10 kernel?I don't have other pc's to test my LDAP authentication, so I needed the two VM's to have different IP's.

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Networking :: VirtualBox Bridged Adapter + 8021q = [b]ridiculous Performance[/b]

Oct 15, 2010

I'm configuring a CentOS 5.5 2.6.18-194.17.1.el5.centos.plus server in order to have multiple VirtualMachines in it. The throughput of the machine is at least 300KBps (yes KB), I configured two web servers one on the virtual machine and the other in the physical machine, the difference was: 300bps-3 KBps on the virtual machine, 230KBps on the physical machine.

The configuration is as follows:


If I attach the public ip address to the virtual machine this gets smoothly.

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Networking :: Iptables Rate Limiting For Bridged Connection ( Kvm Created Bridge )?

Oct 27, 2010

I have a bridged network setup ifconfig -a gives following output

br0 Link encap:Ethernet HWaddr 00:26:b9:82:42:38
inet addr: Bcast: Mask:
inet6 addr: fe80::226:b9ff:fe82:4238/64 Scope:Link
RX packets:150779 errors:0 dropped:0 overruns:0 frame:0


3) What are these vmnet1,vmnet2,vmnet3,vmne4 which I see above. I used kvm and virt-manager to create a bridged setup.

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OpenSUSE Network :: 11.2 Xen Bridged Networking - Setup Multiple DomU Through The Default Bridge Setup

Feb 4, 2010

Im trying to setup multiple domU through the default bridge setup. I am able to access only one of them through the network at a time. If you ping one of the domU it works perfectly but you cannot ping any of the others until you stop pinging the one and even then it takes a bit before you can. Ive looked around for a while and seen similar problems but nothing ever seems quite the same. Im probably missing something really stupid. Or is this the way the bridge is supposed to behave? Do i need to use a routed virtual network?


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Networking :: Bonded NICs At Host OS - Ubuntu Server - Bridged To Virtual OS - UServ - In VMware Server

Jul 19, 2009

Just something that struck me while working on our virtual servers today.

I have bonded 3 NICs at the host in Ubuntu Server 8.04 LTS. They are using mode 0 for Round-robin. Point is to increase the speed/performance of all the servers, but mainly the fileserver. The fileserver is a virtual server running Ubuntu Server 8.04 LTS on VMware Server 2.0.

1) I noticed the NIC in the slave OS reported link speed as 1000 and Im unable to change it as the NIC (virtual one) doesnt support it. Does this not really matter, as the NIC doesnt exist, and it will run at higher speeds anyway? Or do I have to remove the bond on the host, bridge all 3 interfaces from the host to the slave OS, and then make a bond in the slave OS?

2) While at it, does mode 0 only increase performance on data being sent from the host or does it also increase the available incoming bandwidth?

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Fedora X86/64bit :: Startup Freeze - Unreliable CPM Thermal Sensor

May 13, 2011

My F-14 x64 bootup stalls with this message: "K10 temp ... unreliable CPU thermal sensor: monitoring disabled". I'm unable to find an explanation/basis for this message. I can boot from CD#1 and chroot onto the disk - near as I can tell, all the data is there. Might this be the result of a corrupt boot up sequence file and, if so, which one(s)?

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Fedora :: Privoxy Service "start On Boot" Unreliable

Dec 12, 2009

In an effort to reduce/eliminate adware, I installed Provoxy from the F12 repos using yumex. The config file is unchanged except for the addition of the this line: forward-socks4a / .

I note that rpm placed the following (/etc/rc.d/init.d/privoxy), and that in that file are the following lines:

I seem to recall that network manager was changed somewhat to allow those using static ip addressing to NOT do dhcp on boot. Could this be the reason for the non-starting of the privoxy service on boot? Sometimes it starts on boot, and other times I must manually start it in Gnome's System->Services.

If these lines and the network starting is the problem, how do I fix it? Can I comment out these lines in this file, or is there somewheres else where I should be looking?

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OpenSUSE :: Mousedown Is Unreliable, KDE 4.4?

Nov 8, 2010

When dragging, or holding the mouse down in general the mouse tends to 'let go'. In some situations the mouse grabs *through* the window. For example, I may be scrolling in okular and suddenly find myself dragging an item in the browser below. The behavior is independent of the application (it may fall through Dolphin onto Okular just as easily). Highlighting text is the worst performing... It usually takes two to three goes to get the right range. Is this a known issue? Known solution?

OS Information
OS: Linux x86_64
Current user:
System: openSUSE 11.3 (x86_64)
KDE: 4.5.3 (KDE 4.5.3) "release 8"


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Ubuntu :: HDMI Sound Is Unreliable?

Feb 8, 2011

I'm using an HDMI connection, and the sound connection is unreliable at best. When it works, it is working fine, then all of a sudden (maybe because it isn't being actively used for an extended period of time)the sound connection vanishes. When at System --> Preferences --> Sound --> Output I'm not seeing any option for the HDMI connection currently and the sound is not working. All the volumes are unmuted and I cannot use a softphone nor .....,nor do videos that I have watched in the past with sound have any.

Last night when this happened, I rebooted and the sound was working just fine then. In the past, I was able to get the computer to recognize the HDMI connection has sound by momentarily unplugging it, then plugging it back in. Though both last night and today that hasn't worked.When I bought my computer, I had Windows 7 installed on it. The same thing was happening then, though it was always fixed via disconnecting the HDMI connection briefly, so there is the possibility of it being a hard ware issue.

I've also tried turning off the device (a HDTV in this case) and turning it back on, but that only solved it once or twice, and neither last night nor today.This is also a 64 bit computer, should that be relevant. Using Ubuntu 10.10, and the only available update to my system at the moment is Google Chrome, which I will be updating after this post.I will be restarting my computer after that update and posting back here if the sound is working, especially with note of whats listed at the System --> Preferences --> Sound --> Output if there are any additional options (from memory, there was an HDMI choice there).

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Ubuntu :: Printing From OpenOffice Is Unreliable

Jul 10, 2011

In general, OpenOffice is quite buggy. My latest problem has been printing. I have this .dot file. When I print it to a networked printer, the document never prints. However, these work:Print to PDF. Printing to a file, transferring the file to the destination machine, and printing it works. Transfer the document. If I print the document directly on the destination system using LibreOffice, it works fine. Printing a web page. This works fine. Since I have a workaround, it's not so crucial that this be fixed. I'm just venting .

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OpenSUSE Install :: Unreliable Boot With Hdmi Out?

Jul 28, 2011

I have a TV connected to my 11.4 laptop all the time, when I boot Grub outputs its options on the TV screen, then lizard appears for a couple of seconds and then it switches to notebook monitor to continue booting. Or not. About half the time both screens, TV and notebook, go black and nothing happens.

So far I just reboot and wait until the switch from tv to monitor is successful, if that happens everything boots and loads fine. It's like unwatched milk - everything is okay until the moment you turn away and the milk boils over. Boot hardly ever fails if I sit and watch it but sometimes I get two fails in a row.

Never seen this behavior with 11.3 on the same notebook with the same hdmi always plugged in.It's a Core i5 with integrated Intel and a separate nVidia graphic card, what other info is needed? Grub? Dmesg output? Maybe there's a boot log file somewhere, too.

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Ubuntu :: USB Serial Adapter Unreliable On Startup

Mar 8, 2011

I am using a Sealink PN 2202 USB serial adapter on a linux box (Ubuntu 10.4) running kernel 2.6.32-28-generic. I have written a perl script to simply log the incoming RS232 data (9600 8N2) and it works fine when I start it from a bash shell:
perl /home/pk/PerlCode/RS232_D4_v11.pl

However, I need the computer to boot and start logging after a POR. If I try to use Startup Manager to execute my script everything seems ok but I randomly loose about 20% of the incoming RS232 data. In Startup Manager I use the command
gnome-terminal --title="D4 RS232 Log" --execute bash -c "perl

If I close the automatically-started script and restart it from a bash shell, I again will randomly loose about 20% of the incoming RS232 data. It almost seems like I have screwed up the driver by using the Startup Manager. The only way I can get reliable logging again is to remove the script from Startup Manager, then restart the computer and manually launch the perl script. I was thinking that maybe the order in which the driver was loaded and perl script started might be an issue. So I tried a bash script that sleeps for 15seconds, then starts the perl script. Again, I loose random pieces of incoming data when this is initiated by Startup Manager.

Here is some more info:
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 004: ID 0c52:2223 Sealevel Systems, Inc.
Bus 002 Device 003: ID 0c52:2213 Sealevel Systems, Inc.
Bus 002 Device 002: ID 03eb:3301 Atmel Corp. at43301 4-Port Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub .....

sudo cat /proc/tty/driver/usbserial
usbserinfo:1.0 driver:2.0
0: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0c52
product:2213 num_ports:1 port:1 path:usb-0000:00:1d.0-2.1
1: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0c52
product:2223 num_ports:1 port:1 path:usb-0000:00:1d.0-2.2

ls -al /dev/ttyUSB*
crw-rw---- 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1
I am a member of the group dialout.

I though it may have something to do with su vs my ownership of files. If I do a sudo chmod 777 /dev/ttyUSB* then
ls -al /dev/ttyUSB*
crwxrwxrwx 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crwxrwxrwx 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1

However, after rebooting it reverts to
ls -al /dev/ttyUSB*
crw-rw---- 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1

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Hardware :: HP 5610 All-in-one Fax VOIP And Unreliable Fax Transmission?

Feb 10, 2009

I have this HP 5610 all-in-one fax machine and have always had the issue of faxes failing either receiving or sending ever since I began using VOIP at home about 5 years ago. I have played with the setting of the fax machine and turned off error correction and etc and it has improved but mostly still fail. Voice quality if fine and my network has no problems that I can tell. I have read on the internet that this is a common issues with VOIP and fax machines. This issue is also happening at a friends house as well.

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