Ubuntu Networking :: How To Find Primary Dns, Secondary, And Default Router

May 1, 2010

im trying to open my NAT on my PS3, and it's asking for my primary DNS, secondary DNS, and default router. how will i find these on ubuntu? i got my ip and subnet mask, just need the other three.

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Ubuntu :: Where To Find Primary And Secondary DNS?

Nov 8, 2010

My question is that simple, how can I find out what is my primary and secondary DNS? I've tried commands: $ cat /etc/resolvconf and less /etc/resolv.conf but they didn't work. Also, when I open the resolv.conf file, it only says code...

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Ubuntu Networking :: Using DSL Gateway As Secondary Router?

Mar 4, 2010

I live on a property with 3 other units and we all share a cable connection. There's a modem connected to a wireless router (I'll call it the "main" router), which until recently I connected to with an 80' or so long ethernet cable because I don't get a good signal, and all I've got is a desktop anyway. When plugged directly into the main router, I can get very fast download speeds - the fastest I've seen over bittorrent, for example, is about 2.2 Mb/s, and it's over 1 Mb/s most of the time for popular torrents or sites with good bandwidth. A friend with a laptop is staying with me for a month, so I wanted to set up a wireless router in my home, and my desktop needed to be moved to a location where running a wire is kind of awkward, so I planned on using the wireless too.

I don't have a spare proper router with an uplink port laying around, but I did have a spare DSL modem/wireless router combo (which I'll call the "secondary" router) that I used to use at a former residence, and I thought I'd try to use it here. I plugged it into my computer, configured its security settings how I wanted (64-bit WEP) and looked through for settings that seemed like they might pertain to using it in this capacity. I didn't really find any except for something that seemed to turn off its DHCP, which I did. Then I unplugged my computer and plugged in the ethernet cable that runs to the main router (which is a normal ethernet cable, not crossover). I found that this setup does "just work" for the most part - our computers see the signal and can log in and access the internet through the main router's cable connection. However:

1. I can't figure out how to access the secondary router's settings once it's been plugged into the main one, even if I unplug it from the main one. What happens is that as soon as I connect the two routers together, it's almost like the secondary ceases to exist independently until it's settings are purged via the reset button. I plug it's IP address into a browser like usual, and nothing happens (it's an Actiontec whose stock one is 192.168.0.1 and the main router is a Netgear with an IP of 192.168.1.1).

I can log into the main one like normal through a wireless connection to the secondary, though. If I look at "attached devices" in the main router's config, it lists all the client computers in the network, but there's no IP that could be for the router (I'm sure of this). Each computer connected through my secondary router gets assigned its own IP like normal, and port forwarding works without a hitch. Again, this persists until the secondary is reset - after the two routers are connected but until the secondary is reset, there doesn't to be a way into the secondary's config. The security settings are acting as they should, though (ie, you need the secondary's WEP key to log on).

2. Internet download speeds when connected to the secondary over wireless are extremely slow compared to what the connection is capable of (can't seem to top 90 Kb/s) but for some reason the max attainable internet upload speed seems to be about the same as normal (around 200 Kb/s). This is puzzling to me. Back when I was using the secondary router for it's intended purpose as a DSL gateway under XP, I downloaded at around 300 Kb/s all the time with it using the same wireless card I am now, so I know the hardware I have is capable of it. Now both of our wireless cards are getting the same mediocre speeds (seemingly bottlenecked at around 90 Kb/s), even with a full signal (ie, the computer right next to the router).

If we connect to the secondary router with a cable rather than wireless, there's no problem and downloads are really fast (note again though that the max upload speed doesn't seem affected whether wired or wireless, as determined by running internet speed tests in both configurations). Ping times over wireless are also extremely high - ie, 800ms+ even when pinging the main router at 192.168.1.1.

It almost seems like there's something inferior or bottlenecked about the wireless signal the secondary router puts out, but I don't know what that could be or how to change it. (I also don't really understand anything about the setup I created here though, other than that I plugged it in and crossed my fingers and it works for basic, non-bandwidth-intense tasks). basically I'm curious whether there's a way to have normal access to the secondary router's settings in this setup, and whether there's a way to make the bandwidth over wireless less mediocre.

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Ubuntu Installation :: Moving HD From Secondary To Primary?

Jan 18, 2010

Currently I am running Ubuntu 9.10 on an older P4 system with EIDE harddrives. My primary HD has a WinXP installation and GRUB. Ubuntu is installed on the secondary HD.

I am happy enough running Ubuntu that I would like to remove my WinXP disk, move the disk with Ubuntu on it to be the primary boot drive, and then install a new drive as the secondary.

However when I tried to simply move the drive with Ubuntu on it from the secondary to the primary EIDE position the system would not boot. I assume that this is because there is no boot loader currently on that drive.

how do I put GRUB on the Ubuntu drive so that it can become the boot drive? Or is there some other way to accomplish what I am after without having to reinstall Ubuntu?

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General :: Change A Primary Partition Into Secondary In Ubuntu 10.04?

Nov 3, 2010

linux newbie and i made a mistake while installing windows and linuxI made 4 primary partitions for my HD as i didnt know that only maximum 4 primary partitions are allowed.Now 25 GB of my HD is wasted. It is shown as unusable.CAN ANYONE PLEASE TELL ME IF I CAN CONVERT MY WASTED 25GB INTO SECONDARY AND USE IT WITHOUT FORMATTING AND RE PARTITIONING MY ENTIRE HD ???

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OpenSUSE :: Swapping Between Primary And Secondary Language?

Aug 15, 2011

How do you swap between primary and secondary languages for the keyboard (using GUI not terminal codes since this is for someone else who is a beginner at computing)? I installed the secondary language in the "language" section of yast, but can't see any options for swapping on the fly. Lets say they do 99% of stuff in english, but get an email they want to respond to in the secondary language or want to write a text document using the secondary language, is there a way to switch back and forth on the fly?

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General :: Moving From Primary To Secondary Dns Server?

Mar 17, 2011

How long does unix wait till moving from primary to secondary dns server (in /etc/resolv.conf) if the primary is uncontactable?

Where is this setting, so I can change it?

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General :: Primary / Secondary Ethernet Interfaces Via NetworkManager

Mar 12, 2010

I have an Ubuntu 9.10 machine with three ethernet interfaces, eth0, eth1 and eth2. eth2 is connected to a private network. eth0 and eth2 are connected to two different LANs. Either one will provide access to the internet. All three networks have DHCP servers. Using Ubuntu's the default settings (And Gnome), when I boot up all the interfaces are active and my system gets three IP addresses. However any attempt to access the internet results in connection timeouts and other weirdness.

I suspect that traffic is going out on one NIC (like eth0) and coming back in on another (like eth1). I'm not sure what's going on. The only way I can access the internet at the moment is to bring two of the devices down with ifdown. How can I configure eth0 as my primary interface so all trafic goes out by default on that interface, while keeping the other two active? Also, I want to make sure Avahi broadcasts properly on all three IPs so that the computers on the LAN of eth1 can still connect to myHostname.local...

Here's my routing table:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
172.16.151.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2
172.16.30.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 172.16.30.2 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.1.0.1 0.0.0.0 UG 0 0 0 eth1

I want the 172.16.30.2 network to be the primary one and the 10.1.0.0 network to be the secondary one. My nameservers are also incorrect. It seems like Ubuntu is bringing the networks up in order, eth0, then 1, then 2, and the DHCP information from eth1 is overriding eth0, and eth2 is overriding eth1. How can I reverse this so the DHCP information from eth0 is the "master"? This seems to be an issue with Gnome's NetworkManager.

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General :: SSD As Primary Or Secondary Drive On A Small Server?

Jun 6, 2010

I'm pensioning off my 10-years-old home server and replacing it with an Ubuntu 10.04 box. The two storage devices are a Western Digital Caviar Green 2.0TB HD and an Intel X25-M 34nm Gen 2 80GB SATA II 2.5inch SSD (the box has 8GB RAM and an i5 750, if it matters).

I don't care much about boot times (since I don't plan to reboot all that often;-); the main frequent, performance-demanding task will be (re)building large open source C or C++ software packages from sources (as an open source contributor, I do that often).

So, I thought I'd keep the SSD as the secondary drive and the HD as the primary one, using the SSD mostly for the files that can otherwise demand a lot of seeking (esp. in a parallel make).

However, the friendly vendor (perhaps more experienced in Windows systems than in Linux ones) thinks the "normal" way to configure the machine would be with the SSD as the primary drive. I'm pretty rusty on configuring and tuning systems, so, I thought I'd better double check on SuperUser.

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Server :: DNS Setup - If Primary Fails Secondary Can Take Requests

Mar 12, 2011

I just installed primary dns server now want to install new slave server so that in case if primary fails secondary can take requests.

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OpenSUSE :: Apps Opening On Secondary Monitor Not The Primary Screen

Feb 9, 2010

I have openSUSE 11.2 KDE with NVIDIA drivers. I have a TV on the left and a monitor on the right. In the Nvidia drivers this has also been setup as stated. The TV is on position 0:0 and the monitor is in position 1920:0. The monitor has been ticked in the drivers as the primary screen.

My problem is that all application open on the secondary screen and not the primary screen (monitor) as I expect. How to the OS/drivers that will ensure that application always open on the monitor situated on the right are welcome.

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Server :: Raid 1 - Resync The Drives In The Array Hda Primary And Hdc Secondary Using Mdadm?

Nov 30, 2010

I am learning software raid 1 with centos 5.5. I created the raid with out any problems and removed the first drive to check there was no problems and it booted. I have installed the old drive back in the system as hdc and need to resync the drives (used old drive as partitions correct) I thought I could use raidhotadd but id does not seem to exist anymore. how I resync the drives in the array hda primary and hdc secondary using mdadm

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General :: Secondary Group Users Need To Change File Permissions Of Primary Group Files?

Oct 19, 2009

i want secondary users can able to change the files permissions of primary group?user MAC is having www as a primary and httpd as secondary group. But he want to change the file permissions (chmod) httpd group files. Is it possible or not? I think its not possible. If it`s possible then let me know how?

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Networking :: How To Set Up Router Default Web Page On Debian / GNU?

Oct 10, 2009

I have set up a LAN/WLAN, DDNS server, DCHP server, and a proxy/NAT server using Debian/GNU. Now I would like to redirect the host web browser to a welcome web page so the users of my network can read the terms of use and accept them before having access to the internet. Could some one help me to achieve this?

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Ubuntu Networking :: 10.04 Will Not Find My Router / Network

Jun 27, 2010

I'm trying to get online on my laptop, I just installed Ubuntu 10.04 (Side by side with Windows 7.) I'm looking over the networking help files, as well as the troubleshooting and nothing seems to be working. [URL]. From this troubleshooting guide it tells me to open the terminal and type the command "sudo lshw -C network" and when I do, it asks me for my password but when I try to type it, nothing comes up. So I run it without typing sudo. It says "*-network DISABLED" which in the troubleshooting guide means that my router is off, but I'm clearly online on this computer as of right now.

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Ubuntu Networking :: Find Router, But Can't Connect?

Feb 3, 2011

It says my routor's name and signal strength but when I try to connect it tries for a while and then fails.

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Ubuntu Networking :: Find The Router's External IP?

Sep 1, 2011

My PC is connected to a HW router which in turn is connected to a modem

Code:

internet-----modem----router----PC1

Is there a console command (e.g. in telnet) to get my external (public) IP?

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Ubuntu Networking :: 10.04 64bit - Cannot Find My Router Even Via Ethernet

Jan 16, 2011

I recently installed Ubuntu via "wubi", and tried to set up the Wireless. After looking at a few threads, they suggested using an Ethernet cable to troubleshoot the problem. However, my laptop does not detect the router even via an Ethernet cable. I am running 64 bit(It auto-downloaded with wubi) on an Acer Aspire 5553G, and my router is a Netgear DG834G. I have an Atheros AR8151 PCI-E Gigabit controller, a Broadcom 802.11n Network adapter and TAP Win32 Adapter V9.

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Ubuntu Networking :: 9.10 - Wireless Network Manager Cannot Find My Router

Feb 8, 2010

To start off I have a Rosewill rnx-n2x wireless adapter and a Dlink 4500 router. The problem is, the wireless network manager detects every wireless router in the neighborhood, except mine. I see this persons, and this persons, but no "My router Not yours". I even tried doing the hidden network setup and still nothing.

I have read that the rnx n2x isnt supported by linux, although I've seen solutions to make it work (which didn't work, mkdir command kept getting denied during make) link to what I'm talking about: [URL]. What I don't get though, is that if the rnx n2x isnt supported by linux, wouldn't I not be getting my neighbors connections to begin with?

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Networking :: Router - How To Find Port Number For Web Management

Aug 1, 2010

I enabled D-Link (DSL-502T) router web management (I am aware of security implication). I was able remotely to login to the router (by typing http://23.45.xx.6y) before changing the default number 80. Then I changed the port number from the default value 80 to 21908 (https option is not available) for better security, and when I tried to login to the router by typing this :

http://23.45.xx.6y:21908

Yes I am aware that if I am physically near to the router then I can check that , but this is not the case with me. How can I make sure that I had changed port number form 80 to 21908? Does NMAP do a trick to reveal which port is used for web management ? or are there other better options?

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Ubuntu Networking :: Computer Unable To Find Wireless Signals Despite Right Next To Router

Apr 4, 2011

just switched from Windows Vista to Ubuntu 10.10 on my Toshiba laptop and I'm loving it, except for some wireless connection problems. About 70% of the time, my computer is unable to find any wireless signals whatsoever, despite being right next to the router. When it does find the signal it connects fine and runs great, but most of the time it doesn't show any signals at all. I can't find any pattern to when it does or doesn't find the signal. My result for the "sudo lshw -C network"

[code]...

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Ubuntu :: How To Find The Primary Resource

Jul 1, 2011

i want to leaning from smple basic ,how and where to choose will be better ! who can refer to ?

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Fedora :: Desktop Icons Default To The Left Monitor Not The Primary?

Jun 25, 2010

I swapped my monitors and reconfigured x using Nvidia-settings. My main monitor is set as primary display and absolute. My secondary monitor is set to left of..

My desktop Icons default to the left monitor not the primary.

Is there a way to change this?

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Networking :: Find The Default Content Of Snmptrapd.conf ?

Mar 22, 2011

I deleted the snmptrapd.conf from /etc/snmp/ and now I want to see the default content to create that file.. Been searching the web but can't find it.

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General :: Find Out Primary Interface On RHEL?

Apr 14, 2011

find out the primary interface on RHEL Linux. I came across [URL]. Is this the best way?

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Server :: Script To Add A Secondary Group To All Users Except System Default Users?

Jun 28, 2009

script which can add a secondary group to all existing users except system users in linux.

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Ubuntu Networking :: DLink ADSL Router As Main Router And The Belkin N1 As Repeater?

Apr 13, 2010

Because of the configuration of my house, I need two routers.I have a DLink ADSL router as my main router and the Belkin N1 as my repeater.I have set up the IP address in the Belkin to be 10.1.1.10 - my DLink is 10.1.1.1. I have disable the dhcp in the Belkin and set the DNS as ISP provided. [URL]..I have set the channel to 11 and in the Ubuntu Network Manger I have set the IPV4 to Link Local Only. I can see the Belkin and connect with my PC.but it will not take me through to the internet.

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Networking :: Setting Up Linux Box As IPv6 Router To Replace Netgear WNR1000 Wireless Router?

Jun 18, 2011

I want to set up a Linux box as a wireless router to replace our existing Netgear WNR1000 router, as I believe the Netgear does not support the coming IPv6 protocol. Unfortunately, it is not flashable with OpenWRT or DD-WRT presently.

As we have Comcast, our cable modem acts as a dumb modem according to the customer support guy I talked to, and our router is the one that asks for the IP address from DHCP. Thus, when Comcast switches over to IPv6, I don't believe my existing router would work, correct?

My idea is to take a Linux box and put two NICs and a wireless adapter in it, using IPCop or Smoothwall to set up a router. I could then enable IPv6 support for when we have IPv6 with Comcast. Is that possible? Would there be a way to get BIND to hand out private IP addresses in the same subnet on the both the LAN NIC and the wireless card?

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Networking :: Set Up A Laptop As A Router To Connect Wirelessly To ADSL Router?

Nov 6, 2009

I have a desktop PC running Ubuntu 9.10 and Windows 7, and a Eee PC 701 laptop running EasyPeasy Ubuntu 9.04. I'd like to connect the desktop to the laptop with a wired connection (eth0), then the laptop to my ADSL router using wireless (ath0).

I have a crossover ethernet cable (I bought on ebay). I have set up my laptop with a static IP address on my LAN and it uses OpenDNS.

I have added this to /etc/sysctl.conf on the laptop:

net.ipv4.ip_forward=1

Then I tried this on the laptop:

sudo iptables --table nat --append POSTROUTING --out-interface ath0 -j MASQUERADE
sudo iptables --append FORWARD --in-interface eth0 -j ACCEPT

This is a variation on what I found on other sites describing how to set up a router. I don't understand iptables very well, but I gather that the above two lines should set up forwarding so that traffic from my router to the laptop will be forwarded to the desktop, and vice versa.

But this doesn't work. The connection doesn't even establish between the laptop and the desktop.

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Networking :: Network Setup - Router - Wireless Router Card ?

Apr 24, 2010

I'm having trouble getting my network set up the way that I want it/had it. You see, when I first set up my network, I just had my cable modem going directly to my standard wired router (A D-Link DI-604), which had DHCP,and was connected to all of the computers on my network. I had one switch hooked up to one of the ports of the router, but this was a regular switch, and it would not try to assign IP addresses, it would just pass through the DHCP info as I wanted.

Now however, my network setup has changed. My room mate and I both got laptops, and we decided that we wanted to have wireless access so we didn't have to constantly plug in to the router.

Now my network is set up like this: The modem is hooked up to the router(DI-604), which is hooked up on the LAN side to our computers, our switch (which is hooked up to 3 more computers), and to a wireless router card (A Gigabyte GN-BC01).

The wireless router card has two jacks for ethernet. One for WAN, and one for LAN. The LAN side we have plugged only into the computer in which the card is installed.

Now the problem is this: The wireless router card comes with DHCP by default, and it's assigning addresses to the laptops and to the computer hat it's in, and worse, the IP addresses are on a different subnet than that of the main dlink router. The Main (dlink) router assigns addresses from 192.168.0.1 (itself) to 192.168.0.254, while the wireless router card assigns addresses from 192.168.1.1 to 192.168.1.254 (itself).

Because of this, I cannot access services on the wireless network from my wired network or vice versa. The first thing I tried was setting the card to assign addresses from 192.168.0.12 to 192.168.0.253, however it just said "internal error" when I tried to do this. I decided that this may be because it sees that it was being assigned an address on it's WAN side on the same subnet. So the next thing I tried was disabling DHCP and setting the "LAN IP Address" to 192.168.0.12, hoping that the DHCP would just go through the card, like a switch. I would have set the LAN IP address to be assigned by DHCP, but this was not an option, so I decided that'd be the best thing to set it to.

Once again however, setting the LAN ip address to an address on the same subnet as that of the IP assigned to it's WAN side caused it to report an "internal error". I verified that this was the issue by setting the LAN address to several other private IP addresses to test (I.E. 10.0.0.1, 192.168.3.1, 192.168.5.12).

My question then really is: How do I set up both routers so that I can access services and computers from each network from the other network. Should I set them with different subnets and set the gateway on the wireless network to the main router? To the wireless router card? Should I put them on the same subnet? Will it know how to communicate?

Here is a link to (picture) my network diagram. Network Diagram

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