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• Can I completely remove the Windows DNS in favour of BIND9 in an AD network?

  - by Vinícius Ferrão

  I would like to remove the DNS feature of Windows Domain Controllers and point the DNS servers to our BIND9 servers. I know it's possible to setup coexistence but this requires a number of extra Windows DNS Servers equals to the number of Domain Controllers in the network. Active Directory expects the _msdcs zone and other things like _tcp, _udp; etc. The main question is: how to make BIND9 takes care of all this AD specific data? And with dynamic updating to make AD even more happier. Thanks, PS: Making BIND9 points to the Windows DNS Servers to resolve the Active Directory specific zones isn't an option. We already do this... EDIT: As today, I'm running without Windows DNS. I'm writing up a guide on how to do this, and I'll update this topic.

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• Is an Ethernet point to point connection without a switch real time capable?

  - by funksoulbrother

  In automation and control, it is commonly stated that ethernet can't be used as a bus because it is not real time capable due to packet collisions. If important control packets collide, they often can't keep the hard real time conditions needed for control. But what if I have a single point to point connection with Ethernet, no switch in between? To be more precise, I have an FPGA board with a giga-Ethernet port that is connected directly to my control PC. I think the benefits of giga Ethernet over CAN or USB for a p2p connection are huge, especially for high sampling rates and lots of data generation on the FPGA board. Am I correct that with a point to point connection there can't be any packet collisions and therefore a real time environment is given even with ethernet? Thanks in advance! ~fsb

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• Detecting man-in-the-middle attacks?

  - by Ilari Kajaste

  There seem to be many possible ways to create man-in-the-middle attacks on public access points, by stealing the access point's local IP address with ARP spoofing. The possible attacks range from forging password request fields, to changing HTTPS connections to HTTP, and even the recently discovered possibilit of injecting malicious headers in the beginning of secure TLS connections. However, it seems to be claimed that these attacks are not very common. It would be interesting to see for myself. What ways are there to detect if such an attack is being attempted by someone on the network? I guess getting served a plain HTTP login page would be an obvious clue, and of course you could run Wireshark and keep reading all the interesting ARP traffic... But an automated solution would be a tiny bit more handy. Something that analyzes stuff on the background and alerts if an attack is detected on the network. It would be interesting to see for myself if these attack are actually going on somewhere.

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• Type App Name To Launch/Activate in Win 8.1?

  - by Rubistro

  Early versions of Windows 8 had this amazingly useful feature: Hit the Windows Key Type the first few letters of an application name Hit Enter to activate it (make it frontmost) If the application was not already running, it would launch it. This still happens, even in Windows 8.1. But if the application was already running, it would still be brought to the front. This is broken in Windows 8.1 (It was also broken in later versions of Windows 8.) Has anyone found a fix for this? So that the application is always brought frontmost, whether or not it is already running?

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• UDP packets to IP addresses other than specific ones not arriving and not shown in Wireshark

  - by Max

  I'm writing a service using UDP, but I can't manage to reply to the client. When sending to the client via the DHCP-assigned IP (192.168.1.143) Wireshark shows no sent packets. The server receives and Wireshark shows any packet sent by the client (broadcasted). If I send to a random, unassigned IP Wireshark doesn't show it. I thought the NIC would happily send it, since there is a router in the way - shouldn't Wireshark show it, even though it cannot possibly be received by a remote endpoint? If I send to either the router IP or another (specific, there is only one other) computer, the packet is shown in Wireshark. I am running Windows 7, the firewall is turned off using the control panel. Does the fact that wireshark doesn't show these packets mean that they aren't sent? What reason could there be for showing packets to one IP, but not another, on the same subnet?

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• Send documents to printer without waiting for Vista to handle queue

  - by Greenleader

  I got a print server on our old printer. Vista has its own queue which presents a problem. I want to bypass this queue and send everything straight away to the printer so the print server deals with the queue and not Vista. Problem is when a second document is being printed from the same computer after first one. Vista is still waiting for info on finishing the first job even 5 minutes after it was REALLY finished. How do I get it so that I can send straight to the print server and not have Vista slow things down by trying to handle the queue itself?

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• Virtualbox 4 hangs when trying to install ubuntu guest on ubuntu host system

  - by misterjinx

  I'm trying to install ubuntu server using virtualbox 4.0.4 in a ubuntu 10.10 host OS. I have the iso image on my hard drive which I used to perform the install. I edited the settings and added this image at the storage section, selected it as a primary master, so I could boot from it and start the install process. But now, each time I start the installation, at the very beginning or if I'm lucky, after I click on the install link at the welcome screen, the process hangs and all the computer is blocked. This happened 3 times already. I even tried to perform the installation using an old CD I had with the 9.10 server version, thinking that the iso image might be the issue, but the problem still persists. I dont know what could cause this problem. My computer is a dell laptop with AMD processor (I dont know if this is important). Any help is very appreciated.

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• Proxy Appliance

  - by Kumar

  I'm looking for a way to set-up a web proxy at home. Hopefully there's a solution I can use to do this. Alternatively, do you have any ideas for setting up one at home using a proxy with an auto updating list? UPDATE - AutoUpdating list so the new sites are categorized and downloaded and the filtering is done by category instead of per site e.g. peerblock works this way Appliance as in a small dedicated hardware or device to perform this task, like WD TV live or Acer Aspire Revo with the media center edition I'd be ok with setting up Squid / Linux / SquidGuard even if i'm not familiar with *nix but ideally a small form factor pc with dual nic's would be ideal so it can be out of sight for the most part !

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• Dell Media Direct is rebooting my machine when it goes into sleep mode

  - by wsanville

  I've got a Dell Studio 1535 laptop, which shipped w/ Vista 32-bit. I've since formatted and installed Windows 7 64-bit. Everything has been fine for months, but recently, every time I leave my machine unattended and it goes to sleep, it wakes with the Dell Media Direct splash screen, and then goes to the "Windows was not shut down properly..." dialog that asks if you want to boot safe mode/start Windows normally/etc. The stupid button is also stuck on currently, but even when it is off, the problem still occurs. From the searching I've done, I've learned that the program is installed on its own partition, but I'm fairly certain I formatted everything. See screenie of my partitions: How can I stop the madness? Update: I've removed the 39 MB OEM Partition and it is still happening.

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• VMware networking - PortChannel or not?

  - by dunxd

  My ESX hosts each have 8 NICS. I have set up 2 NICs for our iSCSI SAN - each is connected to a different SAN switch. 2 NICs are set up for vMotion and Service Console - these are each connected to a different core switch (ports are trunked with VLANs dedicated to vMotion and Management) I now have four ports left over. Currently we have these set up each going into our default VLAN. Two NICs are connected to one core-switch and two are connected to the other. We decided to aggregate the connections to each switch - so they are teamed at the vswitch end, and port channelled at the physical switch end. I am now reading that port channelling these connections is not particularly useful, perhaps even over complicating things. Is there a particular problem with using port channels for VMware? What method provides the best balance between redundancy and performance?

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• Sync Chrome bookmarks to Delicious

  - by becomingGuru

  I use Google Chrome. I love the snappy and fast feeling. I thought I will miss the add ons of Firefox. But, not really. However, I used to use delicious actively and want to continue to do the same. I miss syncing my bookmarks with delicious. What is the simplest way to sync Chrome bookmarks with delicious? Addition: I see and understand that there are no good "add-ons" per se. I don't mind even a simple cron that I can schedule every day. May be I just have to write one, after all.

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• Why would only the cpu fan not spin and no video displayed?

  - by Patrick

  I just built a new computer and when I first powered it on I got a continuous beeping which according to the manual means a power failure. After moving the voltage switch to the left a little I was able to get the beeping to stop. Even after the stopping though the CPU fan doesn't spin, and there is no display on the monitor. All the other fans and lights come on in the computer though, the DVD drive is working and ejects the tray, and the hard drive sounds like it spins up. Has anyone seen this before and know what is wrong or what has failed?

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• Ctrl-C not killing process in CMD.EXE

  - by jtl999

  I've had this issue for a while even after reinstalling. Issue happens after I reinstall all my programs and not in a fresh Windows install (obviously). Might have to spin up a VM and install each program 1 by 1. I suspect it's Git for Windows with it's mini Cygwin wrapper causing this issue. Anyway the issue is basically pressing Ctrl-C does not kill the running process. However when I run cmd.exe or Git Bash or administrator Ctrl-C works great again. Disabling UAC seems to break it again. I've made a video of the issue here. Many thanks.

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• SSLCipherSuite - disable weak encryption, cbc cipher and md5 based algorithm

  - by John

  A developer recently ran a PCI Scan with TripWire against our LAMP server. They identified several issues and instructed the following to correct the issues: Problem: SSL Server Supports Weak Encryption for SSLv3, TLSv1, Solution: Add the following rule to httpd.conf SSLCipherSuite ALL:!aNULL:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM Problem: SSL Server Supports CBC Ciphers for SSLv3, TLSv1 Solution: Disable any cipher suites using CBC ciphers Problem: SSL Server Supports Weak MAC Algorithm for SSLv3, TLSv1 Solution: Disable any cipher suites using MD5 based MAC algorithms I tried searching google for a comprehensive tutorial on how to construct an SSLCipherSuite directive to meet my requirements, but I didn't find anything I could understand. I see examples of SSLCipherSuite directives, but I need an explanation on what each component of the directive does. So even in the directive SSLCipherSuite ALL:!aNULL:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM, I dont understand for example what the !LOW means. Can someone either a) tell me the SSLCipherSuite directive that will meet my needs or b) show me a resource that clearly explains each segment of a SSLCipherSuite is and how to construct one?

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• How does a PDF prevent itself from being printed?

  - by Steven

  I have a PDF for my camera's manual, and Adobe Reader won't let me print it (the print option is grayed out). SumatraPDF also does the same thing (it even says print denied). How does the PDF prevent itself from being printed? It seems that if the program can display it on the screen, then it can also print it. Maybe Adobe Reader respects the PDF not printing, but surely an open source PDF reader wouldn't be so restrictive. So is there something more to this than merely the PDF reader software respecting the PDF's request to not be able to be printed?

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• How to cope with runaway Flash plugin in Google Chrome browser?

  - by Norman Ramsey

  I'm using Google Chrome for Linux, version 5.0.307.11 (Official Build 39572) beta with the Linux Flash plugin version 10.0 r32. Quite often, the Flash plugin goes wild and pegs the CPU with about 95% usage. Laptop gets hot, battery drains. I can diagnose the problem with Chrome's little process monitor (shift-Esc), and I can even kill the plugin, but then when I actually want to use Flash on a page, I can't find a way to restart the plugin; I have to exit and restart Chrome, which with 30 tabs open is a huge hit. Does anyone know what causes this problem? Does anyone have a better workaround (or heaven forfend, a fix)? [I struct out both with search and with Google's help site for Chrome.]

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• git/gitolite: big git repo with several mini projects

  - by Jay

  I'm pretty new to the whole version control thing, and even more so with git. I recently installed git on my computer(s) and set it up on a NAS server. However, I have several client folders with several project folders per client folder. Each one of these client folders is a giant repo, encompassing every project inside it. What I'm wondering is, is there a way to break this apart? So, for instance: The NAS is my 'origin', and has gitolite installed On computer1 I have every project folder in a client folder ever created (clean branch), In computer2 I do not a new checkout of the client branch (because all the projects in that branch are all completed and I don't need a working copy of it), but I do have a brand new project folder for that client "newproject". Is there a way to commit and push to the NAS repo from computer2? Or perhaps is there a better way of organizing all this?

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• Domain points me to some malicious URL and I can't get rid of it

  - by Legend

  Whenever I enter my URL into the browser, it keeps pointing me to http://fornax.myvnc.com/dev The URL doesn't even work and my antivirus doesn't complain about it so I am not sure what is happening. I logged into my domain manager at godaddy and it says that the nameservers are pointing to: NS46.DOMAINCONTROL.COM and I am not sure where this came from either because my hosting is with lunarpages whose nameserver is NS1.LUNARMANIA.COM I tried looking into my .htaccess and it is blank. My index.php was hijacked with some malicious code so I removed it completely. Everything is supposed to be normal now but still some kind of a redirection is taking place and am not sure where this is happening. Any suggestions?

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• TextMate suddenly highlighting all text dark red...?

  - by AP257

  I'm using TextMate on Snow Leopard, don't know much about how it works. After I hit an unknown keyboard shortcut, it suddenly decided to highlight almost all text in my Python files dark red - making all my Python virtually unreadable! I must have accidentally pressed a shortcut - but I've no idea what I did or how to turn it off, and can't find any relevant help in the manual or form. Even just 'turn off all highlighting' would do. Anyone know how to turn this highlighting off? Bit desperate! UPDATE: Figured it out. There's a tiny, tiny dropdown list at the very bottom of every TextMate editing window where you can set the language, so TextMate can highlight invalid syntax - I'd accidentally clicked on it and set the language to something other than Python. Will leave the question up though in case others have the same problem.

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• Disk boot failure, insert system disk and press Enter.

  - by torbengb

  Similar to this related question, I came home and found that my media center pc showed this message, Disk boot failure, insert system disk and press Enter Before I do anything with the (defective?) harddisk, what are the best first steps I can take to fix this with a minimum of damage? Normally the machine (Win Vista) is always on and never reboots by itself (Windows auto-updates are disabled too). Something must have caused it to reboot, though I'm sure we didn't have a power outage. The machine can't reboot on that disk, but it will boot on another disk I just plugged in for testing. I haven't changed anything, or even touched the machine, for several days, and it has been running fine until now. I did replace the power supply some weeks ago, because the old one suddenly stopped working. It has been working fine with the replacement PSU.

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• How to tell if PAE is hurting me?

  - by James

  I have a couple of servers with 20-30 GB RAM that are running (a variant of) RHEL4. They are currently running the SMP i386 kernel, not x64, not even the hugemem kernel. This means LowMem is confined to < 1G, and thus dentry_cache and ext3_inode_cache to 100M or so each. How can I tell if this is a problem? Here's a typical vmstat report while it's compiling some Java: $ vmstat 10 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 19493816 394740 922420 0 0 1058 2292 1491 1020 6 3 80 12 2 1 0 19519480 395244 850156 0 0 1179 1412 1329 1195 9 4 75 12 1 1 0 19557368 392616 828344 0 0 1783 1680 1498 1756 14 5 72 9 I don't like the way bi is nonzero when there is so much memory free. I imagine slabtop could point more directly to the problem but I don't really understand how to interpret its output.

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• Cron stopped working, partially working.

  - by Robi

  Our cron script stopped working in different dates in August. What can be the possible reasons? We did not change anything. Our hosting showed us a log where we can see that cron is executing our scripts. But, nothing is happening in our scripts. If we manually execute the scripts, we're getting correct results like before. I showed the commands to hosting and they showed me that the commands are working. What should I tell my hosting? what should I do? They are php scripts which are executed by CRON and they just post to facebook and twitter. They don't execute any hard or huge things. I even asked my hosting if we broke any rules.

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• Are there any FIPS-140-2 certified solutions for Linux?

  - by Mark Renouf

  I'm not even 100% certain what this involves, but my current understanding is this: use of only approved cryptographic algorithms for network traffic (easy, we use SSL and lock down the algorithms to only the really strong ones). Some form of physical data protection, involving disk encryption and physical tamper evident packaging. Obviously we're on our own if we need a tamper-proof product. But what about software for encrpytion. My guess is just using LUKS (although secure) will not be certified because it's open source (gov't seems a bit biased towards proprietary solutions here). Guardian Edge was mentioned by someone, but that appears to be complete Windows-based. So we need something like it, certified FIPS-140 compliant we can use on Linux.

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• My website is infected with JS:ScriptIP-inf [Trj]

  - by Rizwan Aaqil

  I am using Network Solutions hosting. I was recently attacked with JS:Illredir-S [Trj], I asked my hosting providers to clean it and they cleaned it and updated all passwords, but now after a week my site got infected again with JS:ScriptIP-inf [Trj]. Can anyone please suggest me how to secure my website properly ? Should I change my hosting provider ? I am fed up of these viruses again and again on my websites. I can't even find this virus in my files. Please post informative answers. Thanks

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• Why is port 444 open on this router?

  - by TJ Thind

  I have a Cisco RV110W. I ran nmap at it from the outside and nmap reports that the router has tcp port 444 open. Yet there are no port forwarding rules specifying this port. It should as far as I can tell, be closed. There's even a service listening to that port which I can connect to through telnet. I threw some SNPP commands at it but the service doesn't respond to any of them so I don't believe it's SNPP. Does anyone have any idea why this particular router has tcp port 444 open? I haven't been able to find anything in the manual or on Cisco's website.

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