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• Separating two networks

  - by Farhan Ali

  I have two routers, R1 and R2. R1 (a stock linksys router running dd-wrt) is connected to internet and is serving internet to a network of 5 devices/PCs running a DHCP server, with a network of 192.168.1.0/24. R1 also serves internet services to R2. R2 (a ubuntu server 12.04) gets internet from R1. R2 has 3 PCs attached to it, runs a DHCP server with a network of 172.22.22.0/24. My requirement is that the clients on both sides should not talk to each other at all – with the exception that R1 clients may access the R2 router through its IP of 192.168.1.x. At the moment, R2 clients are able to ping R1 clients, which is unacceptable, whereas R1 clients cannot ping R2 clients, which is OK. I believe iptables could be set up but I don't know how.

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• How to mirror filesystems with millions of hardlinks?

  - by Thomas Berger

  We have one big problem at the moment: We need to mirror a filesystem for one of our customers. Thats usual not really a problem, but here it is: On this filesystem there is one folder with millions of hardlinks (yes! MILLIONS!). rsync requires more then 4 days to just build the filelist. We use the following rsync options: rsync -Havz --progress serverA:/data/cms /data/ Has anyone a idea how to speed up this rsync, or use alternatives? We could not use dd as the target disk is smaller then the source.

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• SNMP - Value of CPU processor load not reflecting reality

  - by Ovesh

  Trying to plot CPU load on my server, with the following hardware: ProLiant DL360p Gen8 (same behavior on ProLiant DL360 G7). The machine is running VMWare ESXi5.1 To create a CPU spike I run dd if=/dev/zero of=/dev/null, and I know the CPU is overloaded, because I can see a correlating spike in the graphs displayed on vCenter. However, running this snmpwalk: snmpwalk -v 1 -c ******** 192.168.MY_IP 1.3.6.1.2.1.25.3.3.1.2 Shows the following results: iso.3.6.1.2.1.25.3.3.1.2.1 = INTEGER: 3 iso.3.6.1.2.1.25.3.3.1.2.2 = INTEGER: 2 iso.3.6.1.2.1.25.3.3.1.2.3 = INTEGER: 2 iso.3.6.1.2.1.25.3.3.1.2.4 = INTEGER: 3 Am I not looking into the right MIB? Should I be multiplying these by a constant? By the way, using HP Agentless Monitoring I was able to get some cpu stats, but not what I'm looking for, at least nothing I could find wading through these MIBs.

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• Creating a filesystem on a file in linux for software development purposes

  - by David

  This question originally start at Superuser.com http://superuser.com/questions/130032/available-filesystems-for-linux-that-are-case-insensitive Summary: My client has a PHP web application that was written and is served from a Windows environments. Unfortunately the past developer didn't obey naming conventions so file includes are of the form "/file/At/SomethingHere.php" when on disk the path is actually "/File/at/Somethinghere.php". I do not want to use Windows for development but the filesystems I use (ext2, ext3 ) are case sensitive. I think the solution will be to create a filesystem like FAT 32 or similar, but I am somewhat clueless how to accomplish that. Starting to read up on DD and fdisk to figure out if those are the correct tools I will need.

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• router w/ WOL out-of-the-box, or is known to work with open firmware

  - by Jaroslav Záruba

  I'm looking for a new WiFi router, and one key feature for me is WOL. Seems like many routers won't do this w/ factory firmware. Given my last router (Asus WL-520g) turned into a disco-brick couple hours after flashed to dd-wrt I'd prefer if the new one supported WOL out-of-the-box. other required features would be: dyndns service support port forwarding sometimes it is called "virtual server" I guess NAT loopback so I can access services running in my own network using dyndns hostname or public IP w/o getting too old (for example DIR-615 with factory firmware lets you wait literally minutes) did I mention WiFi? preferably w/ some range extending technology, if such stuff works at all

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• Simple Workstation Imaging Solution?

  - by Will

  Hey guys, I need a fairly cheap imaging solution for Windows XP corporate desktops. Ideally, I'd be able to set up a desktop exactly as we want it, create an image, deploy this image to a server, then boot a new desktop to a CD/USB Drive/Network and quickly set up the workstation. Ideally, each computer would also have a unique workstation name. Any ideas? Right now I'm using a custom built Linux DD solution, but it's slow, not network-based, can't image multiple computers at the same time as there's only one copy on a USB drive, and can't uniquely name the computers. Thanks, Will

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• Unable to boot to Ubuntu. Inconsistency in disk, X server didn't start. Illegal blocks in Inode

  - by becomingGuru

  I am unable to boot into my Ubuntu system. First I get that fsck died with exit status 4 Then I try to do it manually as prompted and I get that an Inode has illegal blocks and asked to clear it. Upon googling, I found that is because my HD has some problems I booted via Live cd and took a dd of the entire Ubuntu on an external HDD just in case. Is it safe to clear all the illegal blocks. How do I safely restore my environment if I replace my HD. Is there any thing i can do in the meanwhile to continue to use my laptop without significant loss of data. Perhaps a related error, the x server fails to start

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• routing wiredness - traceroute 'vanishes' en route

  - by The Journeyman geek

  I'm attempting to set up one of my boxes as a server (again), but i'm having some odd connection issues- the box itself connects fine to the internet, but trying to connect to my external ip address seems to result in the trace getting 'lost' partway. http://pastebin.com/HCQAGbvn - this is a traceroute from another system that's connected to another ISP - starhub is my own one, while i have another system that i have access to on singtel. I'm wondering if my ISP is messing around with routing, or is something very odd going on. As you note, the traceroute dosen't reach me, but if it helps, i use a dd-wrt router.

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• Clonezilla-SE with another DHCP Server in LAN

  - by aleroot

  I want to install Clonezilla-Server(192.168.1.100) in a network that already have a DHCP Server (dd-wrt with dnsmasq - 192.168.1.1). I've installed Clonezilla-SE on ubuntu Server 10.10, once installed and configured Clonezilla Server i've removed the DHCP-Server and set pxe server address in dnsmasq configuration on DHCP Server : dhcp-boot=pxelinux.0,,192.168.1.100 When i try to start from PXE a Computer in the network clonezilla start, but give me an error that the ipddress of the machine is not given by the clonezilla server and can't continue ... Someone has already tried to configure Clonezilla-SE in a similar enviroment? Is there some configuration on DRBL server of Clonezilla that i need to do ?

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• How can I find a computer on my network that is doing mass mailings?

  - by Alex Ciarlill

  I was notified by my isp that one of my machines is sending out spam. This happened about 3 months ago on windows machine running cygwin that was hacked due to an SSH vuln. The hackers setup IIS and SMTP. I cleared out the machine and all the services are disabled so I think that machine is okay I am wondering if there is any other way to identify which machine it could be coming from? The ISP has NO useful information such as source port, destination port, destination IP... nothing. I am running DD-WRT on my router, Windows 7 PC and a Windows XP PC.

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• Windows 7, file properties, date modified, how do you show seconds?

  - by Jordan Weinstein

  Anyone know a way to immediately show the seconds of a file's date modified property in the GUI? So if you create a file, any file in any directory, right-click and choose Properties, the date modified (if it's recent) will say something like "dd/mm/yyy hh:mm, one minute ago" - reminder this is in Windows 7. Windows XP did it normally. Then they changed something. If you wait a while, eventually you'll see the seconds, I'm not sure how long a while is, but this is incredibly annoying if you want to troubleshoot something that relies on the seconds of timestamps... is there a setting? registry key I can change perhaps? I'm literally using Chrome, pasting in the path of the directory to be able to see the seconds quickly (as a workaround) but would be nice to be able to use Win7.

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• Backup Linux Root Partition (Fedora 12)

  - by SomeNewbie

  I setup my partition scheme to have an extra partition the size of my / partion. I have a separate home directory partition. Essentially, I will be doing things that might make my OS unstable so I'd like to backup the OS state but without bothering my home directory. Can I just backup (maybe with dd?) my root partition to another partition on the HDD? I know to restore it I would have to boot up with a livecd or something and do the reverse procedure. I want this to be as simple and require the least amount of external hardware as possible.

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• why my server has a dir named "?"

  - by liuxingruo

  These are all the dirs in my server: ? bin boot dev etc home lib lost+found media media2 misc mnt net opt proc root sbin selinux srv sys tmp usr var why there is a "?" dir? Thanks very much. BTW: the touch command was found on my server(wiered). I list the bin dir: alsacard cp dd env hostname loadkeys more ps sed tcptraceroute alsaunmute cpio df ex igawk loadkeys.static mount pwd setfont traceroute6 arch csh dmesg false ipcalc logger mountpoint raw setserial tracert awk cut dnsdomainname fgrep kbd_mode login mv red sh view basename date doexec gawk keyctl ls netstat redhat_lsb_init sleep ypdomainname bash dbus-cleanup-sockets domainname gettext kill mail nice rm sort cat dbus-daemon dumpkeys grep ksh mailx nisdomainname rmdir stty chgrp dbus-monitor echo gtar ksh93 mkdir pgawk rpm su chmod dbus-send ed gunzip link mknod ping rvi sync chown dbus-uuidgen egrep gzip ln mktemp ping6 rview tar touch is missing, how can i get it back?

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• Custom firmware for Asus WL-520g

  - by Jaroslav Záruba

  What custom firmware works with Asus WL-520g? (Note this is not 520gU, 520gC, etc.) I failed to flash it with Tomato (Tomato_1_28_ND.zip) - the admin UI does not accept the file, and when trying to tftp the file as adviced for 520gU all I get is this: Transfering file tomato-ND.trx to server in octet mode... Error occurred during the file transfer (Error code = 0): Error in SendPacket() call. I just saved the router form rather unsuccessful flash to DD-WRT (after few hours the router fell into coma), and I'd like to keep it as a backup should the new one die or whatever. (Unfortunately the stock firmware does not support WOL.)

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• Clonezilla-SE with another DHCP Server in LAN

  - by aleroot

  I want to install Clonezilla-Server(192.168.1.100) in a network that already have a DHCP Server (dd-wrt with dnsmasq - 192.168.1.1). I've installed Clonezilla-SE on ubuntu Server 10.10, once installed and configured Clonezilla Server i've removed the DHCP-Server and set pxe server address in dnsmasq configuration on DHCP Server : dhcp-boot=pxelinux.0,,192.168.1.100 When i try to start from PXE a Computer in the network clonezilla start, but give me an error that the ipddress of the machine is not given by the clonezilla server and can't continue ... Someone has already tried to configure Clonezilla-SE in a similar enviroment? Is there some configuration on DRBL server of Clonezilla that i need to do ?

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• Is there a way to change the date format used when InfoPath saves the form data to xml?

  - by Robert

  I have an InfoPath Form template that has some Date Picker controls in it bound to elements in an xml data source. I know I can change the display format of the date by going into the Date Picker Properties and setting the date format. This foramt is only used for display puposes when the form is being filled out. When the form is saved as an xml file the date is always stored in the format YYYY-MM-DD. Is there a way to change the date format that gets serialized to xml? I'm using InfoPath 2007.

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• Startup Disk Creator tool for Debian

  - by user61954

  I was trying to create a USB bootable in Debian to install my new system. I couldnt find any easy to use tool in Debian. I tried downloading the hybrid iso image from the Debian site and copied it to the USB using the dd command as said in Debian site. But it didnt boot. Next I used the Startup Disk Creator tool in Ubuntu and it worked like a charm. Is there any similar tool in Debian? I know that there is Unetbootin but its difficult to install

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• Using a MiFi via WDS

  - by Joril

  I have a Huawei R201 MiFi connected to the internet, and I'd like to use its internet connection even from devices that don't have WiFi, so I grabbed a wireless router I had lying around and configured WDS so that it'd connect to the MiFi, and this is working nicely (I can ping the MiFi from the router web interface). The next step was connecting my PC to the router via ethernet cable, but now I'm stuck... The PC can ping the router, but not the MiFi (they're all on the same subnet). Since the router can ping the MiFi, I guess this is some kind of routing issue? Should I get a more "flexible" router, such as one with DD-WRT maybe? Is what I'm trying to do even possible? (For the record the PC is running Lubuntu 11.10)

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• Create an image of a pure Ubuntu-Installation on Macbook Pro

  - by Stefan Müller

  I'm running Ubuntu 11.10 on my Macbook Pro (Late 2009) as the only operating system, so theres's no Mac OS X oder Bootcamp installed. It runs fine and now i'd like to create an image of the current installation. Unfortunately my Acronis True Image cd doesn't boot on this device and my attempts to create an image with partimage or dd from a bootable ubuntu live cd to a external hd failed ("can't read from block 0"). Are there any others out there with such an installation and if yes: how did you succeed in imaging your partition/device?

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• Servicing a WIM image with the recently released SP1 for Windows 7/Server 2008 R2

  - by noonand

  Hello, I normally hang out over on SO but wanted to ask this question in a more appropriate forum. I have, for the sheer fun of learning how to do (as I'm sick of GHOST and dd images) set up WDS and captured a reference WIM file. One of the things that I remember being promised was the ability to do offline servicing of WIM files. I'm just wondering what the actual procedure is for this? I have the full SP1 ISO down (covers 7 and 2008R2) and was wondering about next steps. If someone could point me in the right direction I'd appreciate it greatly. Thanks - Derek

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• suggestions for migrating a windows 7 install to a new 4K sector disk

  - by myCubeIsMyCell

  Hi, I'm looking to upgrade the disk on a windows 7 box to a new larger drive. In the past for such migrations I'd just hook both drives up and use a linux boot disk and use dd to copy from one disk to the next... boot up the new drive & expand the partition. The drive I just purchased however is a western digital using 4k sectors... not sure if there'd be any complications using my old method moving from a 512b sector drive. Current plan is to try the migration by doing a win7 system image backup to an external drive... then restore the image to the new drive via system restore boot disk. Any suggestions or recommendations on how to best complete this migration would be greatly appreciated. Thanks!

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• Forwarding wifi traffic to wired pc

  - by brydgesk

  I'm trying to play around with Wireshark on my home network, and was wondering if there is a way to create a new connection on my PC that receives all wifi packets on the network. The PC is a wired Windows 7 machine, and I'm using DD-WRT on an Asus RT-N16 router. I'm not trying to hack anything, I have full admin access to the router itself. My searching has led me to articles about client bridges and repeater bridges, but none of them seemed to apply entirely to my situation. I'd like to continue using my standard wifi connection, but make my PC act as a repeater that receives all wifi traffic. Again, the PC has no wireless connection. I've used tcpdump which is installed on the router itself, but I'd be more comfortable analyzing the packets in Windows, as I'm trying to learn Wireshark. Thanks

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• Linksys WRT54GS V6 Router Blinking Power Light

  - by Frank

  I have a Linksys WRT54GS V6 Router in my possession got it at my local goodwill for 5$. Upon start up the Power LED starts flashing like crazy and at the same time the Ethernet ports all light up once then turn off (DMZ and WLAN never turn on). I can ping the router only by setting a static IP on my Pc. I can also successfully push a file (official Linksys OS and DD-wrt) into it via TFTP but this currently does nothing (no 192.1681.1 Access). Any ideas as to what may be wrong? I think its pretty obvious that it's bricked but.. I keep hearing a whole lot of "if it pings it's fixable" on the internet.

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• Resizing mysterious partition written by DDing an ISO file

  - by Jon

  I downloaded clonezilla and then wrote it to a USB flash drive with this: dd if=clonezilla.iso of=/dev/sdb I've confirmed that the system boots and clonezilla runs from the flash drive. I want to store a clonezilla backup on the same flash drive clonezilla is running on, but I tried it and ran out of space, so I started looking at how to resize the mysterious partition type that was generated from the ISO. fdisk -l /dev/sdb .... Device Boot Start End Blocks Id System /dev/sdb1 * 1 111 113664 17 Hidden HPFS/NTFS .... I've tried using ntfsresize from the Debian ntfsprogs package. I'm trying gparted next, but thought I'd ask here if anyone knows a neat way to resize a partition created on flash from a liveCD image. Thanks in advance Jon ps. Assume Debian 6 please.

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• booting FreeBSD 9 from USB stick: boot error

  - by ssc

  I am trying to boot FreeBSD 9 from a USB stick that I created following the official guidelines: dd if=FreeBSD-9.0-RELEASE-i386-memstick.img of=/dev/da0 bs=64k Booting fails with a simple 'boot error'. I have used this USB stick for quite a while for the very purpose of booting / installing new OSs, but I tried a different one anyway - same problem. I have also reproduced the issue on a different machine. I've acquired to image file over torrent which AFAIK has an md5 check built in, but I downloaded it again anyway directly from a FreeBSD mirror. Same result. Does anyone have any success with this ? I did not find anything related online which seems to suggest this is not a well-known problem. Does anyone have a thought where else to search for the cause of the problem ?

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