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• My wifi internet router connection resets when more devices connected

  - by joeeoj

  The wifi internet router is connected directly to Internet cable. The main Pc is attached to it via LAN cable, while 1 laptop and 3 mobile phones connect to it via wifi. Whenever 2 or more devices connect via wifi, the internet connection breaks after one minute and internet connection resets. I tracked this behaviour for weeks, and came to conclusion: It seems like some 'device 1' got IP then it went to suspend mode. Then 'device 2' connected to router and got the same IP. Then the 'device 1' woke up from suspend mode and tried to use his old IP. The router sees that 2 same IP addresses exists and automatically reset internet connection. Is this possible? Have I tracked the problem correctly and how to solve it? The router is set to lease 100 IP addresses to devices who try to connect. The password is strong and no hacker's device is being connected to my wifi network. Tried changing password and AP's name.

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• Can't find netbooted for Kerrighed pxe boot with Ubuntu Lucid Server

  - by Pengin

  I'm following installation guides for pxe booting and kerrighed. I can't find the package nfsbooted for Ubuntu 10.04. Where did it go? Context: At work I have access to 8 mini-ITX PCs and am trying to build a cluster. My plans include trying Condor, GridGain, Hadoop, and recently Kerrighed has caught my eye. (I reaslise these are all for different kinds of things, I'm just evaluating). Ideally, I'd like to have all the nodes network boot from a single server, since that seems so much easier to manage, plus I can 'borrow' additional PCs for a while without touching their HD. I've been getting on great with Ubuntu Lucid Server (10.04), trying to follow the only guides I can find to get pxe booting (and ultimately kerrighed) to work. This guide is for Ubuntu 8.04 and this one is for Debian. They both refer to a package I can't seem to find, nfsbooted. Has this package been replaced? Am I doing something daft?

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• How do I delay email delivery using Entourage 2008 with Exchange, e.g. using the X.400 Deferred-Delivery header?

  - by Matt McClure

  I'd like to delay the delivery of email that I send so that I can time delivery when the recipient is unlikely to be reading email and I can reduce the likelihood of getting into a chat-like conversation. I'm using Entourage 2008 and Exchange hosted by Rackspace. I tried naively adding a Deferred-Delivery header after reading http://www.faqs.org/rfcs/rfc2156.html and www.itu.int/rec/T-REC-F.400-199906-I/en , but my mail was delivered immediately. Ideally the delay would occur on the MTA instead of my MUA so that delivery would still occur even if my laptop were disconnected from the network at the delivery time I specify. My best workaround at the moment is to habitually use Entourage's Send Later button when composing mail and then click Send/Receive at the end of the day. This is less than ideal because recipients are often reading mail at the end of my day, and I often get immediate replies. Matt

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• Understanding DHCP setting for DNS Server Options and Scope Options

  - by Saariko

  I have installed 2 DC's on my network (W2K8 R2) both serve as a replicate DC on my domain. On one of them (DC1) there is also a DHCP server running. On both I have a DNS server running. I am trying to understand the difference in the settings within the DHCP of Server Options and Scope Options. As I understand it: On the server options, I should put an external DNS for system (lets say 8.8.8.8 - google) And on the scope options, I should put both my internal dc1 and dc2 IP's as the server. - which are than distributed to my domain clients. Is that correct? Is there a better way? Do I need to add loopback address as well?

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• Windows scheduled task not running

  - by Ravi Kumar Singh

  I have several SQL server backups on a server. I have created a batch file which then copies these to network drives. These are mapped to the server, and it works properly. Now, I've created a scheduled task to do this. If I select "run the task when logged in", I can test the task. It works fine. However I cannot test it with the other option "run task if logged in or not". I've read that testing this task is not possible manually. However the task runs when we log off the server automatically.

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• What is the difference between apt-get and dpkg?

  - by William F. Hammond

  Both apt-get and dpkg can be used to install and remove packages. When to use which? Context: I'm in stuck in package limbo between 10.04.4 LTS and 12.04.1 LTS after an attempted upgrade via the package manager. For example, to fix things I wanted to remove "skype" so that things it depends on could be freed up. But "aptitude" (my normal package management tool) refused to remove it. The advice at http://administratosphere.wordpress.com/2011/11/02/rescuing-an-interrupted-ubuntu-upgrade/ seems helpful but not adequate to resolve my package conflicts. Also there's a strange thing where the grub menu seems not to be properly interpreted, but eventually I get the splash screen with "/ is not ready yet or not present. Continue to wait; or press S to skip or M to recover manually." Manual recovery puts me in a single user shell where I can easily remount / as rw and bring up the network. If I become myself, the command line seems quite robust, but, there seems to be no way to get X11 going.

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• Web.NET event coming in October

  - by Chris Massey

  If you’re a web developer in Europe (or would like an excuse to travel to Europe), you should definitely take a look at the Web.NET event coming in October. It’s being organized by two Italian web maestros (Simone Chiaretta and Ugo Lattanzi) and the session list looks fantastic. The event site pretty much speaks for itself, but here’s a quick version: It’s a free one-day event on October 20th, with a huge variety of great sessions by great speakers, all 100% focused on web development. There’s a pizza-fuelled hackathon in the evening; thrills, spills and hot new skills. It’s a great chance to network with the local (in relative terms) web development community. It’s free (although all donations are very greatly appreciated). It’s in Milan, darling. Here’s what you need to do: Go and register on www.webnetconf.eu, and vote on which sessions you think look the most interesting. I know this will be a difficult process – it’s *very* hard to choose – but persevere! Grab your place when the free tickets become available early next month (places are limited). Come to Milan in October, learn some new skills, meet some great people, and maybe build something awesome if you feel like staying up late. I’ll be there, and hopefully I’ll see you on the day.

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• Install VirtualBox Guest Additions "Feisty Fawn"

  - by codebone

  I am trying to install the virtualbox guest additions into a feisty fawn (7.04) VM. The problem I am running into is that when I Click install guest additions, or place the iso in the drive manually, the disk never shows up in the machine. I even manually mounted and went to the mounted directory and it was empty. When using the file browser, doubling clicking on the cdrom yields Unable to mount the selected volume. mount: special device /dev/hdc does not exist. Secondly, I tried installing via repository... but according to the system, I have no internet connection. But, I can browse the web using firefox just fine (in the guest). Here is my /etc/network/interfaces file... code auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp I also tryed setting a static ip... auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.253 netmask 255.255.255.0 gateway 192.168.1.1 The reason I am trying to get this particular installation running is because it is part of a book, "Hacking: The Art of Exploitation" (Jon Erickson), and is fully loaded wilh tools and such to go along exactly with the book. I appreciate any effort into finding a solution for this! Thanks

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• I just ordered 70/10 line, and need a new router I think?

  - by data_jepp

  Before I had the 25/5 line and the n standard router did just fine. Now it doesn't do the job. Online speedtest reads at 82 so I have the line. But my laptop is getting less than 30 in my room. My laptop has the following WiFi card: http://www.intel.com/content/www/us/en/wireless-products/centrino-advanced-n-6205.html What is this talk about 2,5 and 5ghz? Can my laptop be connected at once over both bandwidths? And that would let me use the full 70Mb over wifi? Hope it's ok to ask network questions here.

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• Is there any viable alternative to using a linux/unix/BSD firewall/router/vpn?

  - by ObligatoryMoniker

  I am trying to purchase something to replace our Vyatta router that is running in a virtual machine on Hyper V (having the whole network go down when the host has to reboot is not convenient and I am getting the sense that this configuration may not be stable). Most posts on this topic suggest using Linux/OpenBSD/FreeBSD/etc with some recommendations to use appliances from vendors for specific purposes like firewall and VPN. We are a windows shop and it has been a stretch for us to make use of Vyatta but since it was free and straightforward to use we decided to use it. Now we need something that is easier for our team to (re)deploy and manage. I would rather purchase something windows based or an appliance that can do all of the following things: DHCP server (reservations, specified gateway, dns, etc) Static Routes that route traffic across three interfaces Easily Reproducible (Powershell script, Puppet, Chef, etc) Intuitive interface (Decent web interface would be fine but I don't want them to have to go to CLI) Does any one have any recommendations on what I should be looking at that might meet our needs?

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• ISA - Why do i suddenly need to specify settings on the client machines?

  - by user40623

  Have been pulling my hair out over this one for hours, and wondering if someone can help. I have a server with two network interfaces that was running isa 2004 and humming until i installed sbs service pack + isa 2004 service pack 3. Grrrrrrrrrr I can get the client machines to connect to the internet but only by installing the ISA Client on each machine or setting proxy settings etc in the internet settings. Ideally i want the client machines to just work with no configuration or proxy server settings as they were before. Where do i start, and what other information do you need from me if any to find out what im doing wrong Thanks!

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• Is there a way to see what is typed or websites visted when a spouse is using google chrome in incognito ?

  - by Ken

  My spouse and I have 2 laptops both running windows 7 and I have 1 desktop running vista. I have reason to believe she is cheating and I want to watch her internet usage, She is always using google chrome in incognito mode. I have tried a few keyloggers but they never seem to be able to get the keystrokes when she is on google. I dont know if there is a way I can network them so they go thru my desktop then to the internet. We are using Brighthouse cable internet. any ideas would be great thank you

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• forcing upgrade or how to upgrade packages after update failed

  - by Orosjopie

  How do I continue upgrade or fix upgrade as upgrading in 13.04 to 13.10 failed. I'm currently running terminal in restore mode. I get the error unmet dependencies, but tried to install apt-get -f install, but get this error: unable to fetch some archives. using apt-get update also brings errors for example: failed to fetch http: archive.canonical.com/ubuntu/dists/quantal/release.gpg Could not resolve 'archive.canonical.com. Is it my internet connection? Its currently connected via a network cable and internet is on other computers. If internet on my ubuntu 13.10, how do I switch it on? or how can fix my upgrade problem that I can boot ubuntu normal, backup, then format and reload ubuntu 13.10 properly? I posted this problem that has also linked to this problem I mentioned: upgrading to ubuntu 13.10 failed/crashed. I did manager to install/upgrade some of the files and got ubuntu 13.10 to reboot, but not 100%, as it is slow and the unity desktop is not showing 100%. in trying some of the commands online, I get the error that the activity manager is not installed, when trying to install it, it conflicts with activity-log-manager-common. Please assist.

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• We have moved to larger offices

  - by Chris Houston

  First of all we should probably apologise for the complete lack of blogging over the last 6 months! As web developers we are constantly telling our clients that they should keep their blogs up to date and it seems we have been ignoring our own advice.That being said, we have been very busy moving offices and helping our new host QV Offices setup their new business. As well as all the moving we have not been sitting on our hands, we have built the new site for DairyMaster over in Ireland as well as a separate private website for their global distributor network.As Umbraco Gold Partners we have found more and more that we are working on projects where we are the silent development partners, so although we cannot talk publicly about a lot of the sites we develop, we have some real beauties now in our portfolio :)Now that the dust has settled in our new office ( and has been hovered up! ) we are read for the new year and are looking forward to working on some exciting projects that are currently in the pipeline.We are also intending to run some Hacking sessions for Umbraco as we now have lots of space for developers to come and work with us, so if you have any ideas of a theme for an Umbraco Hackathon then do let us know.And with that it just remains to say Happy Christmas to you all and see you in the new year!

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• What is the most suitable way to manage iSCSI storage for Virtual Environments?

  - by Gabriel Talavera

  We are planning to place a HP MSA P2000 with two FC/iSCSI controllers in our network. We have two options to provide more storage to Virtual Machines (We are running Hyper-V): A) Add iSCSI targets to the Virtual Hosts and then create VHD that we would add to each guest server. B) Directly add iSCSI targets in each guest server. Just wondering if one of those options is better than the other, and which is the common practice in a virtualized environment. Thanks in advance for any input!

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• apt-get update very slow, stuck at "Waiting for headers"

  - by Liam

  I have looked at similar questions: Stuck at 0% [waiting for headers] (apt) apt-get update stuck on "Waiting for Headers" However neither one of them answer my problem. I am running 12.04 AMD64 and have recently started getting an issue that when I update my repos from my connection at home through a terminal, using sudo apt-get update, it takes forever (literally after 2 hours it was at 28%), however when I run from a different location it takes less than 5 minutes to complete. I have attempted changing which mirror I use but that does not solve the issue. I have also cut down what is in my sources list but this also makes no difference. There are no faults on my ADSL line as I have already contacted my ISP to check this. It also makes no difference if I use a WiFi or network cable connection. What could be my issue? A speed test (www.speedtest.net) comes out at about 0.9 Mbps down and 0.42 Mbps up (which is a shade under the advertised line speed), I reside in South Africa and use the UCT LEG server. But I have also tried the other mirrors available in SA....none of them make a difference.

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• How to configure my hosting provider for email when DNS redirection already in place?

  - by Johann

  First of all I apologize for my poor understanding of network and I hope I used the correct terminology for everything: I have bought a domain name with 1&1 to create an online shop, using kingeshop. I followed the steps explains here to point the domain name to kingeshop IP address and everything is working fine. Now I would also like to use my domain name to create an email account. But 1&1 seems to say they're not responsible for this now the DNS is transfered to kingeshop's. What I'm wondering is who is really "in charge" of my domain name now? 1&1 also lets me configure the MX-record but I don't have a clue what I can do with this. Could I just use an existing gmail address somehow? Thanks a lot for any help or clarity you can bring me on that matter!

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• Aircrack-ng, is it illegal?

  - by Jasen

  I just found out about this linux-based network toolset called aircrack-ng, and its pretty interesting, and I'm learning how to use it. But it just occured to me, that like a lot of linux programs, they're developed in foreign countries, with different laws. I did do a google search, and the only thing in regards to what i am asking that pops up is a question on another site. So, my question is, is it illegal in America, specifically Ohio, to use this program? I mean i know it has a legitimate purpose, but so does hemp. Also, sorry if this is the wrong place for this question, but I'm not exactly sure where it should go.

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• Join Domain and Dos App

  - by Austin Lamb

  ok, So First off yes i have read all the related topics and those fixs are either out of date or dont work. i am running ubuntu 12.04 and i would like to add it to the win2008 server network, after i get that done i would like to mount the F:\ drive of the server somewhere on my linux machine where it can be identified as Drive F:\ by wine or Dosemu if i can achieve all of that i need to find out how to run a MS-Dos 16-bit Point-of-sales Graphic program in ubuntu whether that be through wine, dosemu, or dosBox. it does not matter it just has to be able to read and write to the servers F: drive, operate the dos app, and support LPt1 (i think) for printing reciepts and loading tickets. i am a decently knowledgeable windows tech, at least thats what my job description says.. but this is my first encounter with linux in a work environment, it could prove to very experience changing if i can just prove it as a practical theory and a reasonable solution, and get it to work.. the first step is to get it joined to the domain. i have likewise-open CLI and GUI versions, samba, and GADMIN-SAMBA installed in attempts to get any of them to work. any help in any area is greatly appreciated, especially with the domain joining since it is the first step and what i thought would be the easiest step..

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• Netcat I/O enhancements

  - by user13277689

  When Netcat integrated into OpenSolaris it was already clear that there will be couple of enhancements needed. The biggest set of the changes made after Solaris 11 Express was released brings various I/O enhancements to netcat shipped with Solaris 11. Also, since Solaris 11, the netcat package is installed by default in all distribution forms (live CD, text install, ...). Now, let's take a look at the new functionality: /usr/bin/netcat alternative program name (symlink) -b bufsize I/O buffer size -E use exclusive bind for the listening socket -e program program to execute -F no network close upon EOF on stdin -i timeout extension of timeout specification -L timeout linger on close timeout -l -p port addr previously not allowed usage -m byte_count Quit after receiving byte_count bytes -N file pattern for UDP scanning -I bufsize size of input socket buffer -O bufsize size of output socket buffer -R redir_spec port redirection addr/port[/{tcp,udp}] syntax of redir_spec -Z bypass zone boundaries -q timeout timeout after EOF on stdin Obviously, the Swiss army knife of networking tools just got a bit thicker. While by themselves the options are pretty self explanatory, their combination together with other options, context of use or boundary values of option arguments make it possible to construct small but powerful tools. For example: the port redirector allows to convert TCP stream to UDP datagrams. the buffer size specification makes it possible to send one byte TCP segments or to produce IP fragments easily. the socket linger option can be used to produce TCP RST segments by setting the timeout to 0 execute option makes it possible to simulate TCP/UDP servers or clients with shell/python/Perl/whatever script etc. If you find some other helpful ways use please share via comments. Manual page nc(1) contains more details, along with examples on how to use some of these new options.

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• IIS site hacked with ww.robint.us malware

  - by sucuri

  A bunch of IIS sites got hacked with a javascript malware pointing to ww.robint.us/u.js. Google cache says more than 1,000,000 different pages got affected: http://www.google.com/#hl=en&source=hp&q=http%3A%2F%2Fww.robint.us%2Fu.js http://blog.sucuri.net/2010/06/mass-infection-of-iisasp-sites-robint-us.html My question is: Did anyone here got hacked with that and still have any logs (or network dump) available for analysis? If you do, have you spotted anything interesting in there? Sites as big as wsj.com got hacked and some people are saying that maybe a zero-day on IIS/ASP.net is in the wild...

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• IIS 7 with verisign certificate, invalid certificate returned

  - by bh213

  We have IIS7 on windows 2008 and we installed verisign certificate and bound it to https. Certificate seems fine. Chain: mysite.com - not expired VeriSign international server CA class 3 - not expired Verisign Class 3 Public primary certification Authority - not expired Yet when I use verisign online validation, I get that second certificate is expired. https://knowledge.verisign.com/support/ssl-certificates-support/index?page=content&id=AR1130# This is what it reports, mysite is reported to be ok: ---------------- --Issued To-- Organization: VeriSign Trust Network Organizational Unit: www.verisign.com/CPS Incorp.by Ref. LIABILITY LTD.(c)97 VeriSign Organizational Unit 2: VeriSign International Server CA - Class 3 Organizational Unit 3: VeriSign,, Inc. --Issued By-- Organization: VeriSign,, Inc. Organizational Unit: Class 3 Public Primary Certification Authority Country: US Validity Start: Wed Apr 16 17:00:00 PDT 1997 Validity End: Wed Jan 07 15:59:59 PST 2004 ---------------- Any ideas?

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• FTP Issue when connecting to a debian machine from windows

  - by erin c

  I have a .net application which copies bunch of files to a specific FTP folder on a debian machine on periodical basis, ftp folder has 755 mod, owner of the directory is the ftp username that I authenticate in .net application. So far I tested this application with bunch of debian boxes, my initial attempts generally fail with following message if I try it with a debian machine that I haven't tried it before: "remote server returned an error 550 File unavailable" When I see this error, I log onto another debian machine on my network, and I try FTP'ing the debian box that returns the error message from command line. I generally "put" a very small file to the folder in question, right after that windows application starts copying files successfully via FTP. It is as if my command line ftp operation fixes the problem and makes debian compatible with my .net application. I checked permissions before and after the problem, it doesn't look like what I did changed anything, I am at loss understanding why this problem occurs and why it is fixed with my silly hack. Can anybody tell me where to look at next to fix this extremely annoying issue?

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• Using WDS to make a router act like a makeshift signal booster

  - by cornjuliox

  I've got a router that supports WDS, and I was wondering if I could use it to help extend the range of an existing wireless router? The PC I'm using right now is just barely within the signal range of a wireless router, and the signal is rather weak so I moved my wireless USB adapter away from the computer using a USB extension cord and used a pie tin + some packing tape + a stack of books and a tall wooden stand to make a sort of reflector dish. Sometime in the future I'd like other PCs to be able to connect wirelessly but with the way things are set up I can't move any farther from this spot or I lose the signal entirely. Can I use WDS to bridge the two networks together both to increase the range of the first network and allow computers connected to the 2nd router to share internet access?

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• clam anti-virus is slowing down my server performance significantly

  - by Scarface

  Hey guys, I just installed clam av http://sourceforge.net/projects/php-clamav/ for scanning file uploads on my linux VPN running php. The problem is that for some reason just initiating the extension in the php ini file slows down my entire network. Regular requests such as changing pages that should take less than 1 second take 5. Has anyone ever experienced this before or have a good virus scanning alternative for scanning file uploads? extension=clamav.so [clamav] clamav.dbpath="/usr/share/clamav" clamav.keeptmp=20 clamav.maxreclevel=16 clamav.maxfiles=10000 clamav.maxfilesize=26214400 clamav.maxscansize=104857600 clamav.keeptmp=0

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