Networking :: Add Another Secondary IP On CentOS 5.5?
Sep 21, 2010
I have a problem with secondary IP on CentOS 5.5 With network configuration like this
[Code]...
So I try to add secondary IP
[Code]...
If i try to add another secondary IP (for ex. xx.231.17.166) xx.231.17.166 *can!* be pinging from global network And if i try to add xx.231.17.147 in network configuration script and reboot server (so this address becomes primary) all works fine. So i need to set xx.231.17.147 as secondary IP, but i can't do it..
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Jul 1, 2011
Everything worked fine until very recently, and without apparently ANY change to the settings on the server, a secondary IP that was assigned to my server won't work anymore..Any IP attached to the same server works fine.. So in my case, the problematic IP is 213.8.155.67. The other IP (213.8.155.42) works without any problem.How would I go about troubleshooting this?
ifconfig:
eth0 Link encap:Ethernet HWaddr 00:26:B9:44:11:3A
inet addr:213.8.155.33 Bcast:213.8.155.127 Mask:255.255.255.128
inet6 addr: fe80::226:b9ff:fe44:113a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]...
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Feb 10, 2011
I have a number of CentOS servers with latest 5.xI have 3 nameservers in the resolv.conf files. All 3 nameservers test out fine when checking for domain lookups.I'm having some trouble with ns1 and shut it down.l None of the CentOS machines fail over to the ns2 & ns3 entries. Basically everything stops resolving even though the other 2 nameservers are alive and well.
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Apr 12, 2010
I have a secondary slave dns server setup, it has transferred all the records from the primary master.But when I run a few checks from outside using tools on the net it says:Tried to fetch SOA record for domain, but DNS server ns2.domain.com returned error code Refused.I disabled iptables, and tried again, same result. So I think it is something in the named.conf file? I appreciate any extra set of eyes on it. Just feel like I'm so close!
key "rndckey" {
algorithm hmac-md5;
secret "mysecretkey";
[code]....
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Mar 12, 2009
I am hosting some VPS, and I am wondering the best way to copy the VPS data to a secondary hard drive mounted on /backup on a daily basis.
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Mar 29, 2010
I have installed a secondary Ethernet card, rebooted, but found no eth1 interface. The output of: lspci | grep Ethernet
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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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Nov 22, 2010
I've recently set up a fedora 13 machine to use as a media server, I've been able to get everything going except samba. I've installed a second hard drive which is mounted at /media/Core and works fine on the local filesystem. I can browse the share from my mac however when I connect I get this in the smb.log file
[code]...
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Nov 30, 2010
My friend has a server with 2 ips, 1 primary and 1 secondary/failover. He has given me a shell account and I want to use ssh to route my home http traffic through it like a socks proxy. I connect to his server using the secondary ip like this:
ssh me@secondary_ip -p port -D forwarding_port
It builds a proxy, however it uses the primary ip of the server, not the secondary ip that I logged in with. When using irssi I've bound it to the secondary ip with no problem. If I try to use the -b flag I get the error: cannot bind: Cannot assign requested address.
how I can bind the ssh tunnel to the secondary ip?
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Jan 11, 2010
We recently moved all our Red Hat Linux machines from NIS to LDAP and we're seeing some issues with name resolution.
One thing I should mention is that DNS (the first nameserver in resolv.conf)is being used by LDAP for name resolution.
Now our resolv.conf file has always looked like this.
Search domainname.com
Search domainname2.com
Nameserver xx.xx.xx.xx
Nameserver xx.xx.xx.xxx
The problem is that the above resolv.conf file doesnt work anymore. The only way that our workstations get name resolution is by commenting out the second and forth lines, which happen to be our secondary DNS. This has got me confused because why would resolv.conf be broken by having a secondary nameserver and search path? Shouldnt it just use the first nameserver unless it fails to resolve? Almost seems like just having the secondary in the file breaks name resolution. I cant ping local hosts or anything on the internet unless I do this:
Search domainname.com
#Search domainname2.com
Nameserver xx.xx.xx.xx
#Nameserver xx.xx.xx.xxx
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Jan 21, 2010
I have a program that connects to the internet that I would like to route through one of my secondary network interfaces. I need one specific port routed to eth1 instead of eth0. I believe that I should be using iptables for that, but I don't really know how to do it.
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Dec 7, 2010
I'm trying to query the second nameserver on a local network to resolve local domain names to IP's.
Code:
$ ping ids.mydomain.loc
ping: unknown host mydomain.loc
[code]....
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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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Sep 27, 2010
I successfully installed Samba, but have problem with access to any shared folder on my secondary drive. If I try access secondary drive with admin user, everything is fine. If with another account try to access via samba to shared folder on partition with Ubuntu, everything is fine again. Every folder has set privileges to read&write to everyone, so shouldn't be problem here.
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Sep 13, 2009
I have a machine acting as a gateway for a private network. While it can ping hosts on that private network, I can't use samba (smbclient or smbmount) to access shares on hosts on the private network from that machine. Other machines on the private network can access shares on other machines - just not the gateway server.
Here's how the gateway is configured:
When I try to connect to ports 139 or 445 (via smbclient or smbmount) the mount() system call times out. As I mentioned above, I can ping those hosts, so UDP packets work but TCP packets seem to get blocked or lost.
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Dec 14, 2010
a machine with 2+ network cards, need to setup TFTP server on one card and use internet on another.
the tftpd server works on default routing network adaptor with following configuration.
How set the TFTP server on the secondary network adaptor?
TFTP server tftpd by xinetd configuration in: /etc/xinetd.d/tftp
{
protocol = udp
port = 69
socket_type = dgram
[Code]....
Could not find how to change the post <prefix> I remembered clearly I did before.
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Apr 28, 2009
At the school i work in i have a server2k3 server that provides a domain to all the windows clients, aswell as a fedora server that acts as an imaging machine and webserver.
Im rather concious of the fact that if for any reason the Server2k3 server was to die there is no backup of active directory, or anything that can take its place whilst a replacement is found.
So is it possible to use a fedora machine with samba as a secondary domain controller? so it can be used as a login server, and has a copy of AD.
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Feb 19, 2010
I just started setting up a linux box in the office...I have some experience with ssh commands but not setting up a linux system and stuff.The box is connected to our network but I have no clue how to make windows & osx talk with it. How can I go by doing that and also setting up an apache server to be able to connect through network. Right now I have apache/linux/mysql running it works when i go to localhost, but I would also like to let all the computers in office to access it. I would guess that will deal with virtual host which I know how to setup. I just need to setup an IP.
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Jan 18, 2009
I'm having trouble to get connected to the internet on CentOS 5.2 . I have an NVIDIA nForce Networking Controller onboard. And I've been trying to find a driver for this, but I was unsuccesful so far. And if I have a driver, how do I install it? Could anyone please help me to get this working. I'm just a beginner with CentOS and Linux, so I don't have much experience yet. Oh, and I forget to say that Centos 5.2 on VMware does have internet, but I stopped using vmware because it became very laggy on my Vista OS, so I started to use dualboot.
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Apr 27, 2011
I am using fedora 14 now i want to install win7 as secondary os
i have win 7 iso dvd i want to know how to partition my hard disk with NTFS and install win 7 on it..
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Aug 28, 2010
I'm running Ubuntu 10.04 LTS on an old HP Pavilion 710 PC, dual-booting with WinXP. I followed instructions and successfully partitioned my primary hard drive, and installed Ubuntu just fine (I think--everything seems to work, anyway).
Here's my partition setup:
Code:
Code:
The secondary disk is strangely set up for unrelated reasons, and I haven't done anything to it since moving to Ubuntu. My plan is to keep most of my data on that disk, and use the primary disk for system files and applications, but I don't yet understand how Ubuntu decides where to keep things, so I haven't done anything with that disk yet.
Here are my questions:
1. I want to run a MySQL database locally, to test a php/MySQL web site I'm developing. I thought it would be a good idea to set aside a partition just for the database, which is what /dev/sda7 is supposed to be; but I have no idea how to make Ubuntu or MySQL use that partition. (I'm also brand spanking new to MySQL, or I'd probably know.) How do I do that?
2. It occurs to me now that I ought to put the database on my secondary hard drive, which is much bigger and faster than the primary. If the answer to #1 doesn't tell me, how do I do that?
3. My home directory is on /dev/sda right now. Can I move my data files to /dev/sdb without moving the whole home directory? Or must I move everything and keep it all together in one directory?
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Sep 18, 2010
I have an HP computer which I recently installed Ubuntu on with a secondary HD that I installed. I set this new hard drive as the primary hard drive and it was working fine booting up GRUB and asking if I wanted to use Windows 7 or Ubuntu. This morning, however, it has stopped doing this and goes straight into Windows 7. If I go into the boot menu and tell it to boot with the primary hard drive it will go into GRUB, but otherwise it seems as if it is going straight to my secondary HD with Windows 7 on it. This seems weird since up until today it was working fine.
Does anyone know why this is and how to fix it? I tried reinstalling Ubuntu but that didn't change anything.
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Aug 1, 2011
I have an Acer Aspire 1 Netbook - this is running Ubuntu 10:10.My question is - can I continue to have Ubuntu as the Main Op System and install Windows Xp as a secondary running alongside. My Hard Drive !! is on SD Card and is only 8 Gb. Can this be increased easily? Windows would be used only in rare circumstances where Linux will not "fit the bill".
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May 13, 2011
I recently purchased a new 1TB seagate harddisk to store backups of my music, movies etc. I use paid software in Windows 7 to manage backups. However I run the software once every month and so the hard disk gets used only then. Rest of the time it just remains idle. And I use linux most of the time and the secondary hard disk is never mounted on linux. So I just wanted to know if there was a way to shutdown the second hard disk using linux. I dont want it spinning uselessly when I am using linux.
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Jul 26, 2010
We have hosting all the domains to one ISP domain and we want a secondary MX record. Is it possible to have a secondary MX record to another ISP so that if our internet is down we don't lose any email. the first ISP are not providing any secondary MX records
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Jul 24, 2010
I have a second 8GB partition but for some reason I cant write in it at all. I formated it but still doesn't let me write in it. I tried doing this:Quote:sudo chown -R username:username /media/BTBut this is what I get:Quote:
chown: changing ownership of `/media/sda2/FOUND.000/FILE0000.CHK': Operation not permitted
chown: changing ownership of `/media/sda2/FOUND.000': Operation not permitted
chown: changing ownership of `/media/sda2': Operation not permitted
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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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Dec 19, 2010
I have 2 laptops. Currently I have installed Ubuntu 10.10 on one of them. I have Windoze XP installed on the 2nd laptop. I would like to use my second laptop as my secondary monitor since I hardly use Windoze. Is there a way we can use a laptop as a secondary monitor with Ubuntu installed on the first machine (again a laptop in my case).
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Dec 6, 2010
My question is one of my users was using open suse on his workstation (690 DELL),there are 4 harddrives connected to the machine one is of 160GB and the other three are of 1terrabytes.His 160GB HDD got corrupted the one which is having OS and we replaced it to the new one.User advised to install RHEL 5.2 so i installed RHEL 5.2on 160GB HDD by disconnecting the other three HDD.After installing the machine i tried to mount the other three HDD but could'nt.The error message iam getting is 'Not valid partitiion table'.
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Dec 6, 2010
I'm gonna set up a HA-cluster with the help of DRBD. I have installed DRBD and it's working on the Primary node, I synced them and formated it to ext3 and mounted it successfully on the Primary.
When I'm gonna mount it on the Secondary node it just tells me that I need to specify a filesystem.. so it looks like is hasn't been synced properly or something but both nodes are up to date.
This is my drbd.conf:
Code:
global {
usage-count no;
}
resource dbcluster {
[Code].....
and could mount it without any problems on dbcluster1, but it doesn't work on dbcluster2.. according to the documentation and various howtos I'm suppose to be able to use it, mount it on both nodes etc. unless I've missed something.
Does anyone know if there is something else I need to do to get it running properly on the Secondary?
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