Ubuntu Networking :: Routers Ethernet Ports Are All In Use And Can't Get One Of Them
Apr 8, 2011
My first one is the network: Our routers' ethernet ports are all in use and I cant get one of them. So Im asking you what I need to buy. Our router now is a speedport w701v. The new router should have wlan and good working LAN. It shouldnt be very expensive... give me some tips what I should look for (because Im very new with router...) and maybe give me a link where they tested many routers (and where I can trust the results).
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Apr 16, 2010
I have a system with one (sometimes two) ethernet ports, that works happily in an old Fedora 5 build. But I can't get it to work on a new Centos 5.4 build. Original system: One dedicated ethernet port on card always connected to the systems dedicated equipment and no external access (the system is the DHCP master for that network). An optional second USB dongle that is a second ethernet port, used for debugging and development. (This is a DHCP client with full conectivity. In /etc/sysconfig/network-scripts I have ifcfg-eth0, ifcfg-eth1 and a route-eth0. Neither of the ifcfg files needs an explicit HWADDR, which means the same ones work for all boxes. And when one needs to be connected to the network all is fine.
The system is being moved to Centos 5.4, most is working with minimal change, but I am having problems with the ethernet ports. If it only has the on board ethernet connected, all is fine. If you have the USB dongle connected things go wrong: This system brings up the USB ethernet first, and tries to assign it to eth0 (which fails), and then brings up the on board ethernet as eth1 (which also fails). I have tried forcing the behaviour of the network by setting the HWADDR(s), but this does not result in the on board coming up as eth0, it comes up as __tmpxxxx as follows:
ifconfig -a
__tmp226406138 Link encap:Ethernet HWaddr 00:80:66:07:A8:63
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
[Code]...
Currently the only solution is to unplug the USB dongle through restart and plug in afterwards, and this wont work when the unit is remote and in the field.
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Feb 27, 2011
I had 2 Ethernet ports and neither of them were working on a fresh build a friend was struggling with. After reading the suggestions to fix the issue and thinking that there had to be an easier way I had an epiphany. I would go to my spare parts box and bring out my old Netgear GA311 and pop it into the slot. So after searching for 10 minutes I found it and installed it. Booted up the rig and it found that right away (SWEET) now that's not the fix anybody can do that, once I updated Ubuntu the on-board ports started working (that's what I'm using now). I can't explain what the update did but for a few bucks a used card in the tool box might not be a bad idea!
Mother board is a Gigabyte GAX58A-UD5 Rev.1 Personally I'm an ASUS guy.
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Apr 30, 2011
Just recently got a new rig, and was wondering, is there a way to share internet via a switch. I understand the problems with switches is that they dont assign IPs like routers do, but if my ubuntu machine worked like a router by assigning IPs, could it work? Current setup is as such. I have one ubuntu machine with 1 ethernet port (this shall be the main preferably) 1 mac with a single ethernet port 1 modem with a single ethernet port that cannot assign more than one IP address. And a 5 port switch. Would it be possible to place the modem into the switch, get the ubuntu machine to receive the IP address, and broadcast all other address' to everyone else via the same switch and ethernet cable?
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Apr 9, 2010
I have 2 (some future machines will have 4) ethernet ports. I want to have them configured such that if any gets unplugged, as long as at least one of them is plugged in, it can reach the network (even if via a different IP address), and it can be reached (at least when trying a working IP address). I tried this for /etc/network/interfaces:
Code:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
[Code]...
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Mar 11, 2010
I'm currently using Ubuntu 9.1, and a motherboard which has two Ethernet ports on it.
What I would like to do is bridge these ports, so I can plug in another Ethernet cable and run it to an unmanaged switch in my room (handy for my work laptop when on-call and building other PCs, etc).
I.e. Router --> 8-Port Switch --> My PC.
Eth 0 --> 192.168.1.100 static
Eth 1 --> 5-Port Switch --> DHCP
I believe this is the config to make the ports bridged:
ifconfig Eth0 0.0.0.0
ifconfig Eth1 0.0.0.0
brctl addbr Bridge0
brctl addif Bridge0 Eth0
brctl addif Bridge0 Eth1
ifconfig Bridge0 up
- How do I save this so upon reboot it sticks?
- How do I force Eth0 to remain as a static IP of 192.168.1.100?
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Jun 29, 2011
I've had an issue in KDE where each time I restart my computer, I get 5-7 notifications that it wasn't able to connect to my ethernet port. (Or something close to that) I think it's trying to connect to my marvell port over and over. Has this happened with anyone else? I think I remember this happening with Ubuntu as well only it only tried to connect to that port once and then stopped trying.
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Aug 15, 2010
lspci reports 07:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 12) 08:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 12) eth0 is picked up (light when I plug n the cable lights up). nothing for eth1.
other OSes on the same machine pick up both.
My /etc/network/interfaces file looks like
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
iface eth1 inet static
[Code]...
For those who are interested, I have an adsl modem and a router is connected to the modem. eth1 is a connection to the modem. eth0 to the router.
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Jun 28, 2010
I need to ask about Virtual Interface, as I need to use my ethernet interface to act as two ethernet ports. As I need to give eth0 an IP address and give eth0.5 another ip address, and make some natting and other issues. Can I do that with the same interface?
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Apr 12, 2010
I am trying to setup a VPN on my FC 12 box. Looks like getting openvpn to work behind NAT is as easy as just forwarding the ports. Do I need to forward any specific protocols (GRE, etc)? Also, can I do this with one Ethernet port (IE: RJ-45 jack), or do you recommend a second ethernet port? I could add in another PCI ethernet card if it makes it easier. Anyone know if a single ethernet jack will work or do I need two?
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Apr 9, 2011
I have a Opensuse 11.4 workstation that has two ethernet ports and I was wondering if there is the chance to use the other ethernet port as a switch to a Mac/PC?
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Aug 23, 2010
I have loaded Suse 10.3 on a system that has 4 Ethernet ports, all Intel chipsets. 2 ports have the 82571 chipset, 1 port has the 82573 chipset and the last one has the 82567. The 82567 chipset can use the e1000 driver and the 8257x chipsets require the e1000e driver. We are only actually using the 82571 ports.
When the system is booted, the 82567 seems to get bound to the e1000 driver and the 82573 gets bound to the e1000e driver. Doing an "lsmod" I see both drivers loaded. It appears the 82571 drivers are getting bound to the e1000 driver which is a major problem. They work for a while but eventually they lock up with enormous error counts according to "ifconfig". How I know the e1000 driver is bound to the 82571 ports is that when I remove it(modprobe -r e1000) and then try to use one of them, I get a "network unreachable". When e1000 is loaded these ports seem to work fine. I tried modding the file in /etc/sysconfig/hardware that corresponds to the PCI address of these ports(i.e., hwcfg-bus-pci-0000:08:00.0) to force the module to e1000e, but no luck there either.
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Jul 8, 2010
When I try to copy a file from a shared folder of other laptop, the whole of data passes through the router.This affects the internet bandwidth within the network. Is there a way to access the shared files without necessarily going through the router and also without affecting the internet connectivity.
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Apr 1, 2011
I connect to multiple wireless system each day but when I encounter a Linksys-n router the computer will recognize it and connect but does not go online.
Does this give any clue for why it will not connect?
Code:
802.11a/b/g
System wireless is: Toshiba Satellite M115-S3094 with Intel PRO/Wireless 3945ABG (802.11a/b/g), Ubuntu 10.04
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Sep 1, 2010
I have 2 routers both with 5 network cards (both different subnets). On both machines I have the following configuration: Eth0 is the internet conection, Eth1 is the conection to the other router and the other network cards are for the subnets.My current Ip tables script allows all the subnets of one router to see each other but not the subnets of the other router.
In the new situation I want not all but specific subnets to see each other (no problem here)The issue is that some of theese subnets are subnets of the other router. For example the subnet of eth2 router1 should be able to connect to eth 3 on router2. This is were eth1 comes in play. My plan was to configure iptables so that in above example eht2 would be forwarded to eth1, which will forward to eth1 on router2.Then the iptables configuration on router2 will forward it to the network card of the correct subnet.
eth2 (router1) -> eth1 (router1)
eth1 (router1) -> eth1 (router2)
eth1 (router2 -> eth3 (router2)
[code]....
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Mar 26, 2010
I have two routers. One is a Verizon ProLine and the other is a Dlink. My setup is myComputer-Dlink-ProLine-Internet. I'm trying to get port 80 requests from the outside, access my http server on myComputer. I tried port forwarding on both routers, but that didn't work. I also tried to make the ProLine treat the Dlink as a DMZ, but that still doesn't work.
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May 14, 2010
I want to make changes on my router bios for my server I have to go to my windows booted laptop rather than just 192.168.1.1 right here at my server. I only have to do a 360 in my chair and I am at my laptop but I don't want to. Everytime I type the gateway ip it reads off the name of my router and looks fine. But I enter my authentication info and it just returns the login window blank... something ubuntu-side?
WRT160v2 linksys wireless N router (Of course I have cat 5 running to my server)
Ubuntu 10.04 LTS running desktop ontop (because I am still learning how to navigate the console)
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May 6, 2011
I have a 6to4 tunnel running on Ethernet (subnet 2002:ad4c:16cc:1) without problem. It runs radvd and announces a default route back to the Internet like this: "default via fe80::6a7f:74ff:fe0a:fbec dev br0"
On this same Ethernet I have a Linux plugbox (fe80::225:31ff:fe01:cc) which is a gateway to a network of IPv6 enabled sensors. I've assigned this second subnet 2002:ad4c:16cc:2. How do I get the plugbox to announce "2002:ad4c:16cc:2 via fe80::225:31ff:fe01:cc" so that the hosts on the Ethernet (2002:ad4c:16cc:1) will automatically pick up the route? The route works if I add it to the boxes manually. I've tried getting radvd on the plugbox to do this but I've had no success.
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Jul 25, 2011
I have a modem connected to my router (pfsense on 192.168.1.1) which is then connected to a wireless AP (192.168.1.253). A number of PCs pick up the wireless and all is well.I've just received another broken PC that I've kicked into life and was going to run a FreeNAS box with it to back up a number of the PCs on the network. I've actually hooked this up via ethernet to my "server" PC (192.168.1.125 on its wlan NIC). Its all set up so that the server eth NIC (10.42.43.1) is connected to the FreeNAS box (10.42.43.2) and the FreeNAS box can ping both interfaces of the server, the router and the net, and any other box on the 192.16.1.x network. The problem is that I can't for the life of me get any of the 192 boxes to ping the FreeNAS box. I'm presuming its a routing / gateway issue with the server box but being pretty damn hopeless with these things I've been stumbling about breaking things.
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May 20, 2011
My boss gave me the task (on a very tiny budget) of wanting to connect our remote offices to our network. Solution I came up with is Site-to-Site VPN.
I want to use OpenVPN on the Linksys Routers (again very tiny budget) and have them connect to our Cisco ASA5505 Firewall, but I am running into major problems.
Question is, even though they both use IPSec SSL are they compatible? If not, is there a work sround?
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Jun 14, 2010
So I have 3 home routers, 1 belkin and 2 netgear. I have my ISP internet connection coming into my belkin, which I then have the 2 netgear routers (from their WAN) plugged into Belkins LAN ports. Now the Ubuntu computers I have on Netgear LAN 1 and Netgear LAN2 can get to Belkin just fine (at 192.168.1.1), but I am unable to access a computer on LAN1 from a computer on LAN2 and vice-versa. My Belkin is 192.168.1.1, my Netgear1 WAN is 192.168.1.100 and Netgear2 WAN is 192.168.1.200. I have the netgears both assigning DHCP IP's from range of 192.168.0.100 to 192.168.0.150 on their LAN ports.
Now, I have set Netgear LAN1 port 80 NAT'd to go to one of my computers on it. I try to access 192.168.1.100:80 from a computer on Netgear LAN2 network and it say host unreachable.What am I doing wrong?
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Sep 1, 2011
My laptop was working fine on wireless till the userinterface changed and it defaulted to ethernet and now it won't let me go back on wireless How do i disable ethernet?
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Feb 23, 2010
I was pondering over whether or not Linksys routers ship with a host file in it...if it doesn't, can you just manually add one via an FTP transmission?
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Sep 2, 2010
I was going to buy a TP-link wireless router (802.11b/g/n) but while I was reading the consumer's reviews I saw some people were saying that they couldn't make it work with ubuntu. So, I'm starting wandering if there is somewhere any compatibility list? I mean if for instance TP-link or D-link would work with broadcom's chip. I would like to use my laptop's built-in wireless module which is HP Broadcom corp. BCM4306 802.11b/g. My laptop is a HP Pavilion zv6000.
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Sep 7, 2010
One day I lost my WiFi connection while doing nothing particularly interesting. OK then...I investigate, and I find that it only connects occasionally, and when it does, even then it will render a page almost none of the time. I can't even ping anything. I tried going to the router's config page (192.168.1.254 for this one) and found that even that won't load. I power cycled the router, and it did nothing. I thought that the router was dying, but I realized when I switched to Windows 7 (this is a dual boot machine) it works fine. Also, when I went back to Ubuntu and tried connecting to a neighbor down the block's WiFi, it also works fine (this is what I'm using to post this message.) I did all I could to fix this, even to the point of dismantling the machine and moving cards around and such, but it did nothing. I finally formatted my Ubuntu partition and reinstalled, and it also did nothing. It also doesn't work from the Live CD. The router works fine on all the other computers in the house, wired or wireless, and also my phone and PSP's.
While connected, in Firefox, sites sit at "looking up", "waiting for", or "connecting to". It seems to be at random which one. They all time out, none of them say server not found. I thought it was a DNS problem, so I tried some DNS's I know (Google's, OpenDNS, DNS Advantage etc.) but it did bupkis.One thing I notice is that while connected, I have a fantastic signal strength of about 85%, when before any of this happened, it was more around 70%. I didn't move the antenna anywhere or anything having to do with the reception. Also, once connected, it stays connected, it's just getting it initialized that's the problem, but even while connected it doesn't seem to work well.
This is incredibly frustrating, as I did not change anything with the router at all, in any way shape or form. It just spontaneously decided to not like Linux. The router's model is 2700HG-B.Could it be that my wireless card is dying? I've had the thing for 6 years, and had no sign of it failing. I'm thinking that can't be it because it works with the same computer and network, but with a different OS. Could there be something wrong with the Ubuntu driver for my card, ath5k? I was going to say there's something up with wpa supplicant, because I use WPA-PSK for authentication, but I turned that off from another computer and it still does not work.
Again, the problem is that Ubuntu works with every router I can connect to EXCEPT mine, and Windows 7 on the same machine works with the same router. My router works with every other device in the house. I have changed nothing networking related, and even reinstalling Ubuntu did nothing. I would try it with Ubuntu on another machine, but my machine is the only wireless one in the house (and I can't put Ubuntu on the wired ones, that would PO some people),and I would try it with a different wireless card/USB thingy, but I don't have another one.
EDIT: I got some other Live CDs out, I tried Kubuntu 10.04, and Ubuntu 9.10. NEITHER WORK!
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Dec 22, 2010
I have 2 routers, each are assigning IP with DHCP on. One router is plugged into cable modem second router is downstairs plugged into first router. Wire runs in WAN of second router. Each router has its own IP subset. First router assigns IP's to 192.168.1.xxx second router IP's to 10.0.0.xxx
I know I can use the second router as an AP with DHCP OFF. BIG BUT though is my wifi verizon phone got no IP assigned when running like that and wirelessly connecting to the second router. Laptops were just fine. SO, I reconfigured second router with its own subset IP being handed out. Now verizon phone is perfect.
How can I share files between connected PC's using it this way?
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Jan 19, 2011
Does an ISP have to throw away all their old routers if they're trying to upgrade to IPv6?
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Mar 1, 2011
I recently bought a new wireless router to replace my old wireless router. So now I have a spare router. I also have one or two spare NICs around. I read some articles that I can cascade the two routers (connect one LAN port of one router to the WAN port of the other router) so that I can have two subnets such that one subnet is private to the other subnet.I want to create a guest network similar to this configuration such that it can't access other resources. But from what I read, the guest network must be connected to the first router (which is directly connected to the cable modem) and move everything else (i.e, resources that I want to protect) behind the 2nd router.
Well, this isn't what I really want because all the machines behind the 2nd router will be penalized for performance, e.g. NAT will be done twice by each router if any machine needs to access the internet.Since I have a Linux box (running SuSE 11.3), this is what I am thinking and I am not sure if it can be done and I need some advice. I am thinking to install a 2nd NIC on this box, and connect a CAT5 cable from this 2nd NIC to the WAN port of the 2nd wireless router. This little separate network will be my guest network. My goal is to use iptables on the SuSE box to ensure(a) no traffic is allowed from one network to the other network and vice versa. (b) the guest network can share the cable modem to go the internet.I am still picking up the knowledge of iptables so I don't know if this can be done or not
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Mar 26, 2009
Here's the issue: from time to time I have to take away my son's access to the internet, so I exclude his laptop from my wireless Linksys router. Works like a charm, or it did until he discovered that my neighbor also has a wireless router, and hasn't secured it.
So my son sits in the corner of the house closest to my neighbor and uses their internet.
Is there any way I can tell his laptop to NOT access a particular router? Or even better, to only access my router?
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Aug 4, 2009
Every time I start up my Samsung NC10 the wifi doesn't seem to find my wireless router at all and instead tries to connect to my printers network. To solve this I need to disable and re-enable wireless until it automatically connects. I know this isn't exactly a major problem, it's just getting pretty annoying. I'm using Fedora 11 btw.
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