I have one external ip address and a few domains. Would it be possible to have each domain on a internal domain and the box that sits on that external ip route to the internal. This would be for a number of server (mail, apache, imap, pop3, https ) So for example:
Some visit domain1.com ->external ip -> 192.168.10.100 Someone else visit domain2.com ->external ip -> 192.168.10.101 and so one with a number of domains
I would like to redirect a external IP to a internal IP, all done with Apache. Is that possible.
View 4 Replies View RelatedI have two boxes, 1- Centos router, 2- centos web/mail server..
When trying to receive mail using mail.xxx.xxx in the mail client server settings, it will not resolve to any machine on the internal network... I have to enter the internal IP address in the incoming and outgoing email settings..
Same with the website I host.. I have to enter the internal IP to get access..
It just will not resolve the DNS on the internal network.
Everything works as it should outside my network.
Im a computer networking student in my 3rd year and most of it has been based on windows, just completed a Unix Systems Administration course at my University and decided to take the skills home with me, but I have a slight problem and Ive been racking my brains out trying to figure it out. I have 2 Networks in my home and im trying to get connectivity between the 2 networks but to no success
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I have configured CentOS 5.4 as a router/firewall (iptables) as such, and it is working fine:
eth0 - Public IP/Intenet, DHCP
eth1 - 192.168.0.0 internal "net1"
eth2 -10.0.0.0 internal "net2"
I want to add a fourth NIC, eth3, which will be assigned its own Public IP/Internet address (thru DHCP; my ISP provides two). The purpose it to route all net1's internet-bound traffic through eth0, and all of net2's internet traffic to eth3. This allows me to use one router/firewall machine instead of two separate ones. I anticipate that without some specific routing instructions, the default route will be eth0 for all net1 and net2 internet traffic (eth3 will be ignored).
I thought of using just one NIC (eth0) but create an alias (eth0:0), but IPtables (and possible DHCP) can't differentiate between the two (besides, nics are inexpensive). Is there a way to do this through routing commands, or even use iptables prerouting/forward functions (or is using iptables problematic)?
I have an external hard drive with an xfs partition on it. It was using an external journal, but in re-installing Slackware I removed the partition holding the external journal, forgetting what it was at the time. I didn't touch the contents of the external hard drive, but now I can't mount it and the various xfs programs seem to demand that it be mounted in order for them to change anything.Anyone have any ideas on how to change an xfs partition from external log to internal? Failing that, how do I get the information off it?
View 1 Replies View RelatedI'm running Ubuntu 9.10 server at home on VMware Workstation 7. I have two NIC's configured, one NIC is setup to have a direct connection to the network "Bridged", another NIC is setup to have a private network connection on VMnet1.
Network card 1 - 192.168.1.160 (Bridged)
Network card 2 - 10.1.1.1 (Internal access only)
So when I try to access the Internet, I can not go out on the NIC 1. If I try to ping google.com I get a return from 10.1.1.1 "no reply". But I know that NIC 2 is working, because I can ping 192.168.1.160 from the workstation I'm running on.
So I think that my routing is sending traffic out to the wrong NIC, but not sure if this is a metric in the iptables or another place?
The reason for two NICS is to simulate a DMZ where the server will be running Squid, to test proxy from another workstation on the 10.1.1.X subnet.
I have a block of 5 static ip's and 2 servers that push HTTP and other services. What is the best method of configuring/routing traffic to individual boxes on the network?
More detail: One of my static IP's is assigned to a dedicated box for an Ubuntu mirror. Another static IP is assigned to a server with all of the HTTP traffic.
Several configurations function to route traffic appropriately (forwarding proxy or 1-to-1 NAT). However, with 1-to-1 NAT, the box is left open to the world with only the software firewall. Do I really need to place a hardware firewall inline to EVERY server?
Or, what other methods of routing and firewall would you recommend?
i have a laptop that just recently had a hard drive fail so i removed it i have an160 gig external that i want to install Linux on so i got the live cd version of Ubuntu started it up pluged the external drive in whent through the install and set it to boot first but when it boots i get this it says missing modules cat?/proc/modules;is/dev and so on what did i do wrong
View 1 Replies View RelatedI have an older laptop with a broken CD drive so I cannot boot the CD Drive with my ubuntu image. The laptop does not support booting from a USB drive either.So what I did was take the HD out of the laptop and using a USB enclosure plugged it in to my Win7 desktop. Then I booted from my Ubuntu CD and had Ubuntu install on the USB Drive. Took the USB drive off, and put it back in the laptop. It seems to work except it looks like it was installed with my desktop hardware. Also, every time it boots it starts at a recovery screen asking if for several boot options (including win7 which does not exist on the laptop!).
View 1 Replies View RelatedHow can I synchronize my external hdd to a folder on my internal hdd. e.g. when I change something on my external, the folder (on the internal) should be updated to the state of my external (deletes, changes, new files..). but I don't want to make this frequently, so I just need a command to do that. at best secure and without additionally installation.
View 1 Replies View RelatedWould this be a simple case of just installing a fresh copy of Ubuntu 10.04 on my HDD, then copying everything from the USB over? I, of course, would need to update grub to load from the HDD instead of the USB. Would there be any other way to accomplish this?
View 9 Replies View RelatedI just installed maverick netbook edition on an external hard drive, creating my own partition table. When I tried to boot the drive, grub rescue mode told me file not found. I installed again and used the default partition table and got the same error. I gave up and tried to boot my fedora 13 internal hdd but was told that there was no such device. I looked through these forums and ran a bootloader script and was told that my internal hdd had a bootloader but my external didn't. I tried to load the kernel through grub rescue, but the file system was unknown to grub. The files are still on my internal drive and I don't want to reinstall just to boot it.
View 5 Replies View RelatedWay back in the day when I was running Windows I used a Compro Tv Tuner Card which had nice, easy to use drivers for XP. Now that I'm using Ubuntu, I wouldn't mind getting another Card myself (old one died on me) and was wondering what brand was the most linux friendly so to speak?
View 3 Replies View RelatedI had the problems with the external speakers not working in Ubuntu 10.04 on ThinkPad Edge (Intel), my friend advised to upgrade to the kernel 2.6.35.15 and it . But!.. in those kernel version internal microphone is not working, though it works in 2.6.32-24-generic-pae.
View 9 Replies View RelatedI cant boot from my External HD with ubuntu installed.
I get this message:
error: file not found. grub rescue>
In an attempt to fix this problem, I tried using the following sudo command:
sudo mount /dev/sda5 /mnt
sda5 does not exist, I tried 4, then 3, then 2, and it worked, but that was a partition of my internal HD containing windows 7.
I also typed in:
sudo grub-install --root directory=/mnt /dev/sda
not I get the following error when I try to boot from my internal HD:
error: no such device: 57288a24-5d12-4fb1-b27e-eb09a1f9b7c6. grub rescue>
Is there a way to get grub to boot into windows 7 again?
When I type:
sudo fdisk -l
I receive a list of my drives and their partitions, This is my assumption as to what drive is
Which:
/dev/sda1 = Vista loader, for Windows 7
/dev/sda2 = Windows 7 (At least I hope its still there.)
/dev/sdb1 = Bootable Flash Drive.
/dev/sdc1 = External HD.
The text from the terminal is as follows:
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x8da4c52c
Device, Boot, Start, End, Blocks, Id, System.
/dev/sda1, 1, 1355, 10877952, 27, Unknown.
/dev/sda2 *, , 1355, 38914, 301961224, 7, HPFS/NTFS. (The commands changed this from FAT32)
Disk /dev/sda: 8054 MB, 8054636032 bytes
8 heads, 32 sectors/track, 61451 cylinders
Units = cylinders of 256 * 512 = 131072 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier:0x00000000
Device, Boot, Start, End, Blocks, Id, System.
/dev/sdb1, *, 1, 61452, 7865839+, b, W95 FAT32.
Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 =8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier:0x0000a613a
Device, Boot, Start, End, Blocks, Id, System.
/dev/sdc1, *, 1, 30402, 244197376, 83, Linux.
Eventually I would like to fix the error I get when I boot from the external, I would like to to boot to ubuntu, but for now I am concerned with getting my internal HD to boot windows 7. Where I originally found the terminal commands to begin with. I think sda5 is where linux was installed in the example I found, and didn't realize it.
Im running Centos 5.4 with a sftp server, and I�d like to allow all 172.16.0.x ip and 192.168.0.x ip and block everything else. Does someone have a good way to do this with IPTables or any other opensource FW?
View 10 Replies View RelatedI did receive a few errors during upgrade process, one of which was relating to GRUB.
I currently have 2 internal disks, my primary has OS on it, 80GB, secondary is 500gb, both are ect4 filesystem.
My external is 500 firewire 400 and NTFS.
Contents of my /etc/fstab/
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Not seeing any mount points for my internal and external drives
sudo fdisk -l reveals the following info:
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I recently bought an Acer Extensa 5635Z and things were fine until I lent it to my godson for a weekend and got it back with the internal hard drive not functioning; he said it worked one night, and didn't the next morning; now, it's not recognised and an OS is not found during bootup. Whereas this was bad news for me in one way, on the other hand it was the perfect chance to switch to Ubuntu, something I've been wanting to do for years, and I've been really enjoying most aspects of it after using a live disk to be able to do my work over the last couple of days. Now, instead of buying another new laptop, I would like to use an external hard drive that I've just bought in the place of my broken internal hd, and have Ubuntu on it.I've read tutorials on it and they basically say that all I have to do is:
* Run the live disk - done
* Uncheck these options -
Mount removable drives when hot-plugged
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Is that it? Is there anything else I should do for this particular brand or situation (will the BIOS recognise the hard drive?) or any issues I should know about beforehand? How do I choose the HDD as primary boot? Should I insert the external HD before or after unchecking the options? Should I leave any of the 250 GB to '/dev/sda1'? There being no actual internal hard drive won't provoke trouble with the process?
P.S. My computer is 64-bit capable and I've been using a 64-bit Ubuntu disc. I've had trouble viewing things in this interim period, particularly videos, and incapable of installing codecs. Should I just get a 32-bit Ubuntu disc? Or will the problems be resolved when I have a rewritable disc on which to operate?
Im setting up a server thats connected to a large network. Now my external ip on the network is static and is 10.0.12.15. What I want is to create a dhcp network using the second port of my box. The first port eth0 goes to my network with the static ip 10.0.12.15 and my second port is connected to a switch with the static ip 192.168.12.1. Now dhcp works fine but none of the boxes that are connected to the internal ip cannot connect to the internet. Iv tried using squid and manual static ip routes. Im not using network manager or anything cause its a command line server.
View 1 Replies View RelatedDisable internal wireless card & enable external? Can I do this really by network-manager or should I use some other program. If I plug-in external both are connected. If I disable internal by laptop button, I cannot enable wireless anymore in nm-applett (external on).
View 7 Replies View RelatedI have an HP Pavilion that was/still is running Vista. I recently decided to dual-boot to Ubuntu from an external hard drive. Both systems will boot up fine its just that for some reason it won't boot to the internal drive (with vista) unless the external is connected. I just put the HD in another laptop only to have the same problem.
View 7 Replies View RelatedI would like to turn off the internal wireless card since my external wireless card has better signal. Problem is if I turn of the internal card the external card turns off as well. My external card is an alfa awus036h 1000w. Laptop Gateway NV53. How would I disable the internal card and use only my external card?
View 2 Replies View RelatedI have an Ubuntu 9.10 server installation which have been working flawlessly for some months. The server runs bridged networking, because of some VMs that runs on it. But, a couple of weeks ago the network connectivity have started to disappear now and then (usually once a day or so). Running "sudo /etc/init.d/networking restart" always kicks it back to life.
After a bit of debugging I noticed that when OK the routing table looked like this:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 br0
192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
default 192.168.1.1 0.0.0.0 UG 100 0 0 br0
While when in the non-working state it looked like this:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 br0
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0
default 192.168.1.1 0.0.0.0 UG 100 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 100 0 0 br0
Deleting the two routes to eth0 restores the networking again. Why these "erronous" routes gets added, and what adds them? How to further debug this?
Since a few days i can no longer use my external hard drive (USB). During my quest i noticed the following things: Running openSUSE 11.2 / KDE 4.4.3 / single boot My internal HD is on /dev/sda2 (mounted /) partition manager (YaST) or gparted don't start up (they just hang during start-up) I had to change permissions suddenly to read a CD (i was not in de cdrom group, but i have been using CDs for a while)
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> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 113306052 84757232 22793136 79% /
udev 2052352 4140 2048212 1% /dev
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I have a SuSE server (sorry but no idea what version of SuSe it's running.. I'd take a guess at 10.0) on a network with several other SuSE servers. They are all able to be SSHed externally as well as internally and all have their local firewalls disabled. I just had to reboot one of the servers and it is behaving quite strangely. I am able to SSH in and out of it externally, but can't SSH in and out of it internally.
When trying to SSH out internally I get the message:
"ssh: connect to host *.*.*.* port 22: No route to host"
When trying to SSH in internally I get the message:
"ssh: connect to host *.*.*.* port 22: Connection timed out"
Using ssh -v doesn't give any more useful information.
I have double checked that the IP is correct and that the internal firewall is disabled etc. The external firewall hasn't got anything that would prevent it (and shouldn't be an issue anyway as it's an internal only problem... SSH externally works fine). Also, it might help to know that I have the same problem with ping. I can ping this server from an external system, but not from an internal one.
I have a (virtual) server with 3 NIC's: 1 external (inet), 1 local and 1 DMZ. This server is my gateway.
I would like my internal network, where every server has a static 192.168.0.x IP, to access the internet via the gateway.
That means the traffic has to pass from the 'local' NIC to the 'external' NIC, connected to the internet.
Which setting do I change to accomplish this ?
Please check the sceenshot (attachment) for my current setup
we have a DNS server is being used for external clients .Recently we installed awstat monioring tool in ordr to collect either ftp or mail statistic. Since our server is DNS server by defenition we may see all external clients requests to the ftp/mail services .But a LAN clients cannot be resolved by their IPs . The second nameserver line doesn't work. DNS server's conf file looks like :
search mycompany.com
nameserver 127.0.0.1
nameserver LAN_IP_Address
How to configure the server it will resolve both external and corporate clients ?
We have a STM32F103ZET6 microcontroller.It has an ARM cortex-M3 core.We use keil as compiler.We have both an external and internal SRAM.Now I want to declare variables in either of the RAM as I wish.For example some time critical section variables in internal and others in external.How to do this.?
View 1 Replies View RelatedJust curious to see what everyone's opinion on using routing vs. bridging for openVPN. I'm installing openVPN on a linux box that I'm using as a router. What I was wondering was your opinions on which one of these two options to use.
View 2 Replies View Related