Networking :: Adding Two Interface Cards To Bridge - No Connectivity

Mar 1, 2011

I have a network config as follows:
X.8 <---> X.41 X.40 <--->X.16
where X.8 and X.16 are 2 separate workstations and X.40/X.41 are two interface cards in the same machine. Now I apply brctl bridging in the X.40/X.41 machine by adding both the interfaces to the bridge and thereby connecting X.8 and X.16. This part is working perfect. But there is no connectivity between X.8 and X.41 and when I try to ping at X.8 to X.41 it gives Destination Host Unreachable. Is there a way to achieve this since I require some message to be sent from X.8 to the X.40/X.41 bridge machine.

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Networking :: Creating Bridge And Adding LAN Interface

Jun 28, 2009

Setup : internet -- VirtualBoxHost -- WIFI-switch -- clients
VirtualBoxHost hosts several Virtual Machines and has 2 interfaces. Wan-interface is not used by VirtualBoxHost, but is directly mapped to the Virtual Machine Endian Firewall.

What I want:
Access to VM's for the Wifi-clients AND access from WiFi-clients to VirtualBoxHost.

What I have tried:
- create bridge
- add LAN-interface to bridge
- create tap0
- add tap0 to bridge

Virtual Machine uses tap0
Wifi-clients are connected via LAN-interface, via bridge, to VM's. But my host-machine is not accessible from a WLAN-client and also I can not access a VirtualMachine from my host-machine. A WLAN-client can connect to a VirtualMachine without problem. I think with my bridge the local LAN and the VM's are now connected. How to put also my host-machine in the LAN? As a LAN-client.

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Networking :: Set 2 Network Cards In Bridge Mode?

Apr 7, 2010

I have installed CentOs 5.4 for Snort sensor , on the location where i intend to place the Snort sensor to listen for internal firewall leg (LAN) the switch doesn't support port mirror so i would like to create with 2 nic's bridge and pass trough the firewall internal leg my question how do i set such configuration.

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Networking :: Transparent Router / Bridge - Ppp Interface

Jul 27, 2010

The challenge: I am trying to setup a piece of hardware that is transparent to the network that transfers ip packets between two interfaces without adding a "hop". Details The particular problem I'm having is that one interface is ppp, the other is ethernet. It is trivial to setup a bridge between two ethernet devices but I am having trouble finding anything for ppp<->ethernet.

Here, the ppp link is an internet connection, and the ethernet connection has exactly one device attached. Once the ppp link is negotiated, I want the ppp peer to think it's talking directly with the device on my ethernet interface and I want the device on my ethernet interface to think it's talking directly to the ppp peer.

Current solution: The best solution I currently have is to alter the routing table. When the ppp link is negotiated, I am given an ip address. I add a route that directs everything to that ip address to the eth0 device. I also set a default route to the ppp device. Now, anything that comes from the ethernet side gets forwarded to the ppp side, and anything directed towards my ip address gets forwarded to the eth0 side.

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Ubuntu Networking :: Samba With Bridge Interface / Cannot Assign Requested Address?

Sep 17, 2010

I have two network interfaces in my pc eth0 and wlan0 and a virtual one br0.

router <= eth0 (0.0.0.0) => br0 (192.168.1.10) <= wlan0 (0.0.0.0) => other pc.

On startup of my pc (ubuntu 10.04 server x64), samba bind itself only to loopback network interface, as i can see when i do netstat -an , preventing me to enter in my shares from a remote pc.

Here is my configuration regarding samba network:

Code:
interfaces = 127.0.0.0/8 192.168.1.0/24
bind interfaces only = yes
and my /etc/network/interface
Code:
# The loopback network interface
auto lo
iface lo inet loopback
code....

Any idea fo speed up my bridge configuration or to force samba to wait unitl the bridge is ready?

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Ubuntu Networking :: Alix 2d13 - Multiple Network Cards - Unable To Bind More Than One Physical Interface?

Jun 2, 2010

I have a strange problem regarding networking on the Alix 2d13 running Ubuntu 10.04. The Alix has 3 physical network interfaces, lspci says:

Code:
00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
00:0a.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine

[Code]...

It seems, if more than one cable is connected, a random hardware port is chosen as eth0-eth2. If only one cable is connected the port that is connected is chosen as eth0-eth2. Any idea what's going wrong here?

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Ubuntu Networking :: AR5001 Chipset - Wireless Networking Randomly Loses Connectivity And Can Not Regain Connectivity

Jun 25, 2011

Wife's laptop has AR5001 Wireless Adapter laptop model is Toshiba Satellite A215

Problem : Wireless networking randomly loses connectivity and can not regain connectivity, the only apparent solution is a full power down , this is not even certain to work. The card works under Windows, she hates Windows. (I love her for this) I know it's not faulty hardware , because it will work for days on end under Windows without problems.

Things I've tried : madwifi drivers (any and all versions available) : These increase stability of the signal and seem to delay the inevitable however it still happens. When using these drivers the only option is to unload them modprobe -r then reboot then remove them again and re add them. It makes no sense why this works, and if I don't remove them prior to rebooting it will not work.

ATH5K drivers : These are pretty much junk, results are unpredictable at best, sometimes it will work perfectly for a few hours, sometimes it will not work at all. Nothing is repeatable, I can't seem to force whatever condition is causing this. rfkill does not show the wifi being blocked (hard or soft), unblocking it anyway does nothing, only way to make this work and it's iffy is to fully power down wait 5-10 minutes turn it back on and it MAY decide to work.

Firmware update : Updated the Toshiba BIOS to the latest version of the firmware 2.0 no joy here either. Same issue both sets of drivers.

Tried different distros and kernels : I've tried Mint 9, 10 ,11 ; Ubuntu 10.10, 10.04 , 9.10 and 11.04 (which is currently installed) , Fedora and OpenSUSE. All are giving the same problems. I have also tried a slew of different kernels no joy from any of them (I'm not at the computer with the issue now I will post exactly what kernel versions I've used when I have access to the machine).

Another useful bit of information, the hard switch to disable/enable wifi WILL disable it but turning it back on does absolutely nothing. The hotkey does nothing at all. The bios does not have an option to disable or enable the wireless card.

I will also post the typical lsmod , lspci , iwconfig all that good stuff when I get back to the computer in question. I'm probably just going to buy a PC card for it and give up on that one, but this is driving me insane and I would really like to see it resolved even if I do replace the hardware.

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Networking :: Setup A Bridge Using Bridge-utils Within /etc/network/interfaces?

Dec 8, 2008

I want to set up a bridge using bridge-utils within /etc/network/interfaces like is shown here in this guide: [URL] The problem is that, at the same time, I want eth0 to have a specific static IP address. Right now I have a configuration for eth0. This guide tells me that I should not configure eth0 outside of the br0 configuration.

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OpenSUSE Network :: Create Network Bridge / Device Hooked Up Via Ethernet Had No Internet Connectivity?

Feb 25, 2011

I'm on opensuse 11.4 (11.3 won't work with my monitor).

My computer gets internet through wireless and I want to share that internet through its ethernet port. So far I've tried using Knetworkmanager to create a network bridge between my wireless and wired connections. I created a new wired connection and shared it using the ip address settings. I was able to get both connections active, but the device hooked up via ethernet had no internet connectivity.

I also tried this command:
echo 1 > /proc/sys/net/ipv4/ip_forward

but another test resulted in the same fashion (no internet on wired). I believe anything I add to /proc should have an immediate effect, correct?

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Fedora :: Bridge Interface Setup (VirtualBox And LAN)

Jun 28, 2011

Does anybody know how to setup bridge interfaces on fedora 15 (VirtualBox4 interface and my LAN interface)?

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Oct 20, 2010

I was wondering if I could create a bridge between two wireless interfaces. So that when there is a WAN that filters MAC's, 2 different computers which aren't in the WAN white list can connect to the WAN via me. Is that possible? And how?

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Security :: Mount 2 Network Interface Card (NIC) And Make A Bridge

Apr 1, 2010

Actually i'm doing an ingenior training in SAGEM company, well i'm trying to develop an application which is able ti disturb the IP Network,my idea was is to mount 2 Network Interface Card (NIC) and make a bridge to pass the IP flow and to exploit the firewall Netfilter using iptables command.The application has to import a text file containing a binary array like this one:

0 1 0 : 0 corresponds to iptables -p ip ACCEPT
1 1 1 : 1 corresponds to iptables -p ip DROP
0 0 1

==> So the expected result is to have 5 ip datagrams dropped

My idea was: if 0 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
if 1 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j DROP

The problem was: After executing the application and parsing the text file,
with iptables -L -v: i have

Code:
-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
-A FORWARD -p ip -m limit --limit-burst 1 -j DROP
-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT

which is logic, but when i sniff with wireshark i find more packets are dropped(6,7 or 8 are dropped), like i had put more DROP rules. and sometimes i found the exact value(usually 5 dropped).

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General :: Adding PCMCIA Network Cards To Slackware 11?

May 3, 2010

I've been searching all over trying to figure out how to get my Slackware box to detect my 2 PCMCIA wired nics. Specs are:

Dell Latitude CPi (old, I know...)
Compaq 10/100 PC Card (series NNB108)
Xircom "Credit Card" Ethernet 10/100+ and Modem 56 (model: CEM56-100.
Slackware 11 (kernel 2.6.21.5)

Both cards work under Ubuntu 9.04 on the same hardware so I know they are both working and linux compatible.

Checking the /var/log/messages file I see entries when I insert or remove the card. States that a PCMCIA card has been added/removed however other than the /messages log entry there is no other activity that I notice. No lights on the NIC card dongles either. Most of the reading I've done on the net indicate that there should be a /etc/pcmcia/network.opts file but I don't even have the /etc/pcmcia directory. Sure would appreciate some guidance on where to go or what to do to get these two PCMCIA nics up and running.

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Sep 3, 2010

how can I go about adding an additional lo interface, like lo:0? I need to create this interface, give it an IP and set it to not arp, so this box can be behind a load balancer. Just copying ifcfg-lo and changing the requisite attributes did not work, got an error saying "Interface lo:0 is not available".

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Ubuntu :: Network Manager - What Is The Relevance Of Adding The MAC Address To The Interface

Nov 26, 2010

Just curious, because it seems my wireless connection works regardless of whether or not the MAC address is listed there. I'm just curious why that option is there to add it if it works regardless.

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Debian Hardware :: Adding Intel Pro 4965 WiFi And Missing Wlan0 Interface

Mar 20, 2016

My Lenovo laptop has an Intel Pro 4965 Wifi adapter,here is the "lspci" detection:

03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)

So installed the needed "firmware-iwlwifi" kernel module, which is a correct kernel module for this adapter.

Then "modprobe -a iwlwifi"........no complaints !

However,
#iwconfig wlan0
wlan0 No such device
and
# lsmod |grep iwlwifi
iwlwifi 87219 0
cfg80211 350041 4 iwl4965,iwlwifi,iwlegacy,mac80211

The wired ethernet is working fine
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1e:37:82:ac:72
inet addr:192.168.1.16 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21e:37ff:fe82:ac72/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[Code] ....

when I go to "Preferences" "Network Connection" ' "Add" "WI-FI" "Create" "Device MAC Address " box is empty.......no Wi-Fi adapter detected !!!

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General :: Usb Driver : Ti_usb_3410_5052 - After Adding My Device (MSP430 USB-DEBUG-INTERFACE) It Doesn't Work?

Feb 3, 2011

I have problems with my USB driver. After adding my device (MSP430 USB-DEBUG-INTERFACE) it doesn't work.

[ 60.476039] usb 2-2.1: new full speed USB device using uhci_hcd and address 8
[ 60.693959] ti_usb_3410_5052 2-2.1:1.0: TI USB 3410 1 port adapter converter detected
[ 60.693981] ti_usb_3410_5052: probe of 2-2.1:1.0 failed with error -5


I try to do: modprobe ti_usb_3410_5052.No changes.It's Linux

Linux ubuntu 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:44 UTC 2011 x86_64 GNU/Linux

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Feb 14, 2010

I just had an ATT Uverse RG installed. However my Smoothwall router that previously worked fine with the ADSL SpeedStream is no longer accepting an address assignment DHCP ip address from this new gateway. (3800HGV-B)Any thoughts ideas or experience working with this hardware? ATT only supports Windows and Mac

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Jul 18, 2011

I have a ppp0 entry with post-up options like this

mapping ppp0
map none photon-plus motorola
map timeout: 12

[code]...

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Ubuntu Networking :: Dual Ethernet Networking - Lose Internet Connectivity?

Apr 18, 2011

I have a server with two ethernet ports. I configured eth0 to be static, set at 10.1.10.148. I plugged in another router into the other ethernet port in order to configure that router. I configured eth1 to use dhcp. Using /etc/network/interfaces rather than gnome network manager. When I did this, I lost internet connectivity (internet routes through eth0 of course)

- Why did I lose internet connectivity?

In order to recover internet activity, I had to disconnect the new router on eth1 of course, and do sudo ifdown eth1. That wasn't enough however. After rebooting numerous times and pulling out my hair, I finally tried configuring eth0 as dhcp, rather than static, and this fixed the problem.

- Why didn't sudo ifdown eth1 solve the problem? What information was saved between reboots that somehow remembered that I plugged in the new router? Because my thinking was if /etc/network/interfaces was identical, and the network topology was identical, after a reboot everything should be restored, but it wasn't.

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Dec 1, 2010

I have a dns server started with 2 NIC Cards in it. The bios sees both cards but they both dont show in ifconfig. is there a way to activate the second card?

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Mar 30, 2011

i have two ISP, and i want to bridge each IP. Here my example;

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can we setup for two ISP with different gateway ??

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Dec 16, 2010

How can i check my FTP is working properly or not? or check out this connectivity?

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Apr 19, 2010

I use a laptop with a built-in WiFi card (Intel PRO/Wireless 3945ABG [Golan] using iwl3945 module). It's OK but sometimes is not very stable, occasionaly it simply dies and I have to reboot. It was even worse but I improved it by applying a new driver.I also have a very nice USB WiFi card (D-Link System DWA-140 802.11n Adapter [ralink rt2870]). It's much better and faster.

So the problem is that in Ubuntu 9.10 (2.6.31) I can use only the built-in one. The other one (D-Link) also works but I can't make it connect to my router. The built-in card connects to it but the D-Link even does not list it among possible connections (but it lists other possible connections which I do not want to use).The funny bit is that this problem disappears when I use an old Kernel (2.6.28-18 ) : both cards work fine and can connect to the router at the same time (obtaining different ip's). I then disable the built-in one and happily use the external card.

Unfortunately the old Kernel has issues with sound and video, so I would like to use the latest Kernel with the external card. I tried WICD but it didn't change anything.I can add that under the old Kernel the USB card is used as a ra0 device while the new Kernel lists it as wlan1.

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Apr 4, 2011

I have an issue with my Dlink DWA 547 802.11n PCI adapter, I'm under LUCID fully updated.I have no trouble connecting to any wireless but after a few minutes I'm loosing the connectivity strenght (getting ping reply from my router that vary from 2ms to 200ms). But as soon as I'm rescanning the network using the command (sudo iwlist wlan0 scan) everything is fine (constant 1-2ms ping). I'm using wicd as network manager. I have tried to schedule a job in crontab to launch every 10min a network scan command, but didn't succeed to have it working, morehover I don't think that's the good way.

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Jan 14, 2011

The goal: ipv6 connectivity using 6to4 The problem: no connectivity on some internal hosts (mixed win & debian) and no ipv6-web access on any host. Let's start with my external box. It is headless debian lenny dhcp/local-dns & cache/firewall. It has the following interfaces after a reboot:

[Code]...

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Jun 9, 2010

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Jan 13, 2010

Machine 1) I have a Server with RHEL5.
eth0 = 192.168.48.x (static class C ip connected to VLAN switch)

Internet available via HTTP proxy through vlan but from other main server but not from machine below.

Machine 2) I also have a Server with RHEL4.
eth0 = 124.30.XXX.xxx (public IP for availing internet)
eth1 = 192.168.60.xxx (class c ip to share internet via squid on the same LAB)
eth2 = 192.168.16.xxx (class c ip connected to VLAN switch)

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Mar 28, 2010

I am working on a project to build an embedded board with WIFI connectivity. My present status:

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I need help in deciding how to get WIFI connectivity to the board. I guess it would mostly be using WIFI dongle? Any suggestion for a WIFI dongle?How should I get it working? Where should I look for proper reading material? I am am planning to do some basic program practice using WIFI on my laptop. How can I do that ?

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