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• unreadable corrupted ntfs partition - lost clusters reported

  - by Eduardo Martinez

  Hi, partition magic is reporting multiple 'bad file record signature' and 'lost clusters' errors on my 250GB samsung sata disk (connected via usb on a xp sp3). Unfortunately PM is unable to fix. PM shows the drive as being NTFS, detects used space ok and also drive name. But PM browser (right click on partition, browse...) won't show anything (as if disk was empty) Windows Explorer is not even picking the drive name and reports 'the file or directory is corrupted and unreadable' PTDD partition table doctor demo tells me the boot sector is fine, and I can see all disk content on its browser - but crucially cannot copy that content over to a new disk (PTDD browser is pretty arid to say the least) Also tried - photorec-6.11.3 - it actually started to extract files but wouldn't keep file names or any folder structure (maybe I missed sth on the configuration options) - find and mount - intellectual scan went well, the only partition on the disk was detected, then tried to mount into p: but got this error on windows explorer: 'p:\ is not accesible. The media is write protected'. Find and mount allows you to create an image from partition but I don't have a disk big enough at hand. Does anyone know if this will keep the extracted files/folders structure intact? I'm starting to think the disk is pretty screwed and my chances to recover this data are slim. Please someone enlighten me with that marvellous piece of software I am missing :-) Thanks in advance

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• need advice on data center move, communication with both facilities during transition

  - by Brian Roden

  We are beginning the process of moving to a new facility. Office and warehouse operations will both be moving, and we must get shipping operations up and running at the new location while continuing to ship from the old location. Our contract with some third-party warehouse tenants requires two business day turnaround (only weekends and holidays excluded), so we can't have major downtime during the move. We would like to keep our 172.16.60/61.xxx internal address space in use throughout the move. Is it possible to keep using this same internal range, and have our existing WatchGuard Firebox 520 and whatever router we get for the other location (preferably the same model) just treat both locations as one network, leaving our host IPs the same throughout the move? Renumbering the servers when they move isn't a big deal, but our wireless terminals for order picking in the warehouse have fixed IPs (and a fixed IP, non-DNS reference to the host they speak with) and would be a massive undertaking to reconfigure when the servers move (each device would have to be reconfigured at least 2 times -- some when we start using them in the new building and the host is still here, all of them in both locations when the host moves to the new building, and the rest when they finally make the move to the new building). We're trying to avoid that if possible.

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• Nexus One WiFi connection problems.

  - by sunocky

  I have two new Nexus One for a research project. For the projects I need to keep a server running on the phone. But soon I found out that both the phones have inconsistent WiFi connection problems at my home. It can connect to my WiFi network, but will drop off in a random time. And in order to reconnect to my WiFi, I may need to reboot my router, or the phone will say "obtaining IP address" and then "Unsuccessful". I also own a G1 with firmware version 1.6, it has no such connection problems. Well, to my surprise, the two Nexus One works fine with connecting to the WiFi network at my work place, which is a WEP type WiFi connection. By the way, it is a WPA type connection at my home. Anyone knows what's the problems with the Nexus One? Any suggestions on what should I do if I want to keep the WiFi connection live all the time at my home? Thanks very much!

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• The Network folder specified is currently mapped using a different user name and password

  - by Frank Thornton

  I have a NAS device, it has 3 shares. On one computer I have access to all 3 of the shares. On another computer I keep getting this error when try and add a 2nd one. The Network folder specified is currently mapped using a different user name and password [...] That is the message I keep getting. What causes that? EDIT: Every share has it's own username and password. EDIT: NET USE on the one running 3 from the same NAS device New connections will be remembered. Status Local Remote Network ------------------------------------------------------------------------------- OK T: \\192.168.2.5\SHARE1 Microsoft Windows Network OK X: \\Nas-1dsho-abc\SHARE2 Microsoft Windows Network Disconnected Y: \\192.168.2.9\backups Microsoft Windows Network OK Z: \\Nas-1dsho-abc\cbackups Microsoft Windows Network The command completed successfully. NET USE on the other: New connections will be remembered. Status Local Remote Network ------------------------------------------------------------------------------- OK Y: \\192.168.2.5\SHARE1 Microsoft Windows Network Unavailable Z: \\192.168.2.5\SHARE2 Microsoft Windows Network The command completed successfully.

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• Cloudfront - How to invalidate objects in a distribution that was transformed from secured to public?

  - by Gil

  The setting I have an Amazon Cloudfront distribution that was originally set as secured. Objects in this distribution required a URL signing. For example, a valid URL used to be of the following format: https://d1stsppuecoabc.cloudfront.net/images/TheImage.jpg?Expires=1413119282&Signature=NLLRTVVmzyTEzhm-ugpRymi~nM2v97vxoZV5K9sCd4d7~PhgWINoTUVBElkWehIWqLMIAq0S2HWU9ak5XIwNN9B57mwWlsuOleB~XBN1A-5kzwLr7pSM5UzGn4zn6GRiH-qb2zEoE2Fz9MnD9Zc5nMoh2XXwawMvWG7EYInK1m~X9LXfDvNaOO5iY7xY4HyIS-Q~xYHWUnt0TgcHJ8cE9xrSiwP1qX3B8lEUtMkvVbyLw__&Key-Pair-Id=APKAI7F5R77FFNFWGABC The distribution points to an S3 bucket that also used to be secured (it only allowed access through the cloudfront). What happened At some point, the URL singing expired and would return a 403. Since we no longer need to keep the same security level, I recently changed the setting of the cloudfront distribution and of the S3 bucket it is pointing to, both to be public. I then tried to invalidate objects in this distribution. Invalidation did not throw any errors, however the invalidation did not seem to succeed. Requests to the same cloudfront URL (with or without the query string) still return 403. The response header looks like: HTTP/1.1 403 Forbidden Server: CloudFront Date: Mon, 18 Aug 2014 15:16:08 GMT Content-Type: text/xml Content-Length: 110 Connection: keep-alive X-Cache: Error from cloudfront Via: 1.1 3abf650c7bf73e47515000bddf3f04a0.cloudfront.net (CloudFront) X-Amz-Cf-Id: j1CszSXz0DO-IxFvHWyqkDSdO462LwkfLY0muRDrULU7zT_W4HuZ2B== Things I tried I tried to set another cloudfront distribution that points to the same S3 as origin server. Requests to the same object in the new distribution were successful. The question Did anyone encounter the same situation where a cloudfront URL that returns 403 cannot be invalidated? Is there any reason why wouldn't the object get invalidated? Thanks for your help!

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• Sync OneNote Notebooks to/on SkyDrive

  - by Sam

  I've got OneNote running on all computers in our house, using it all the time with several people and computers. The only drawback: I want to keep the copies of OneNote in sync without having to run a dedicated server myself. Right now one of my computers has a folder share, where all others sync to, but this is highly impractical since the computer is not always running. So my question is: is it possible to put the notebook files on a (private) SkyDrive Folder and have all the computers sync to there? This way all computers could keep in sync whenever they got access to the web. Can this be done? and, of course, How? [Update] Maybe I should not have taken knowledge about OneNote as granted: OneNote uses a propietary file format, but has a very good in-file-syncing, working on network shares. Generic 'just sync the complete file' won't be useful at all, because I'd just have 'file has changed on server and on client' conflicts all the time. The sync needs to know OneNote files and be able to sync the content - eg. OneNote itself needs to sync the files, not some generic sync tool.

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• "Safe" personal router use on apartment-wide network

  - by noisetank

  I recently moved into an apartment with internet included in my rent. This was a boon at first, but now I'm feeling limited. To get devices connected (wired or wireless), I have to whitelist the MAC addresses on mycampusnet.com. This is annoying (considering I'm well over the 10 device limit including my roommate's stuff), but what's really driving me mad is that I don't seem to have any semblance of a "local" network. I've relied heavily on static IPs and port forwarding in the past (accessing NAS and remote desktop) and (as far as I can understand), that functionality is nonexistent without my router set up. Also, as my wired and wireless devices don't always seem to make it onto the same subnet, I'm unable to use any of my iDevices with my Apple TV (I can, however, mirror to no less than four strangers' Apple TVs at any moment, which is a whole other level of discomforting). I've talked to the head of the apartment complex and she told me that they personally don't have any issue with my using a router, but the provider (CampusConnect) does not currently allow it. Apparently, enough people have put in complaints/requests about the restriction (the apartments are for graduate students and University staff, many of which need to set up things like VPNs for work reasons) to open up some sort of ticket to get the functionality in place, but all the calls I've made to get status updates have been a waste of time. My question is: If I plugged my router into the apartment network, what would happen? I've been told already that personal routers would "interfere with the wireless" and that they would shut my port down if I used one, but is that a legitimate thing or just something made up that sounds real to keep the average Joe from pushing it further? I'm guessing there's some way of configuring my router to keep it from disrupting the rest of the network, but it's not something they want to tell me for obvious reasons. Am I right? And if so, what are the chances that they'd notice the difference in traffic or whatever and shut off my port?

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• Configure one IIS site to handle two separate SSL certificates using external Load Balancing or SSL Acceleration Servers

  - by bmccleary

  I have one web application on our server that needs to be referenced by two different domain names, both of which have their own SSL certificates. The application is exactly the same for both domains, but we have to keep the two domain names for legal reasons. The problem is that, since both domains need to have their own SSL certificate, that inside of our IIS 7.5 configuration we have to have two separate IIS applications (both pointing to the same physical location) with their own unique IP address and SSL certificate installed. Now, I know that, due to the nature of SSL communications, that this is by design and that you can't assign more than one SSL certificate per IP address and domain name. My question is… is there any way around this limitation and keep one web application in IIS and have it service two SSL certificates based on host name? I know that with the basic IIS configuration that this is not possible, but I was thinking that with some sort of combination of external load balancing and/or SSL acceleration servers/services that we could have these servers process the SSL request and leave IIS clean to have one single application. I am not familiar at all with these technologies, hence the reason I am asking if it is theoretically possible. If not, does anyone else know how to achieve this?

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• Router not connecting to the internet

  - by Peter

  I had a weird problem this morning with my router - it's an Alice Gate VoIP 2 Plus WI-FI - not connecting to the internet after more or less 1 hour online (I'm always connected with the ethernet cable). The led status lights for Power, WI-FI, ADSL, Internet, Service should be on in order to be connected and navigate online. The problem was that the leds ADSL, Internet were off and I did not know why because it never happened before. I looked at the stats in the settings and the numbers for Bytes/Packages for both Sent/Received were there and increasing but I couldn't connect to the internet. I called tech support, they checked and told me to keep the router on for 48 hours because they were checking it. I've reset it twice before and after I called tech support and it still did not work so after about 2 hours of waiting I tried connecting using WI-FI and the leds 'magically' turned on, first the ADSL and Internet(Internet led always turns on last). At this point I'm curious what could of caused this and I'm doubting that the tech-support guys did something. What could of been the problem with the ethernet cable not connecting in the first place? It always works. What do the tech support guys normally do when they tell me to keep the router on so they can 'check it'? PS: I'm using ubuntu 32 bit

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• SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

  - by Barkat Ullah

  Server details: RAM: 16GB HDD: 1000GB OS: Linux 2.6.32-220.7.1.el6.x86_64 Processor: 6 Core Please see the link below for my # top preview: I can often see the error mentioned in title in my plesk panel and my /etc/my.cnf configuration are as below: bind-address=127.0.0.1 local-infile=0 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql max_connections=20000 max_user_connections=20000 key_buffer_size=512M join_buffer_size=4M read_buffer_size=4M read_rnd_buffer_size=512M sort_buffer_size=8M wait_timeout=300 interactive_timeout=300 connect_timeout=300 tmp_table_size=8M thread_concurrency=12 concurrent_insert=2 query_cache_limit=64M query_cache_size=128M query_cache_type=2 transaction_alloc_block_size=8192 max_allowed_packet=512M [mysqldump] quick max_allowed_packet=512M [myisamchk] key_buffer_size=128M sort_buffer_size=128M read_buffer_size=32M write_buffer_size=32M [mysqlhotcopy] interactive-timeout [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid open_files_limit=8192 As my server httpd conf is set to /etc/httpd/conf.d/swtune.conf and the configuration is as below: at prefork.c: <IfModule prefork.c> StartServers 8 MinSpareServers 10 MaxSpareServers 20 ServerLimit 1536 MaxClients 1536 MaxRequestsPerChild 4000 </IfModule> If I run grep -i maxclient /var/log/httpd/error_log then I can see everyday this error: [root@u16170254 ~]# grep -i maxclient /var/log/httpd/error_log [Sun Apr 15 07:26:03 2012] [error] server reached MaxClients setting, consider raising the MaxClients setting [Mon Apr 16 06:09:22 2012] [error] server reached MaxClients setting, consider raising the MaxClients setting I tried to explain everything that I changed to keep my server okay, but maximum time my server is down. Please help me which parameter can I change to keep my server okay and my sites can load fast. It is taking too much time to load my sites.

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• Apache multiple vhost logs, stored locally and sent to remote logstash

  - by benbradley

  I'm investigating centralised logging and it seems there's so many different ways this can be done. I don't want to run logstash as a log "sender", preferring to keep the web servers as lean and simple possible. So that means either using syslog, syslog-ng or the one I'm testing now, rsyslog. But I would like to have separate vhost log files on the web server, in addition to these logs being sent to a remote log collector. I've tested rsyslog using the imfile module to watch the Apache log files, but this means I have to hard-code each vhost log file into my rsyslog.conf. Not ideal as people will invariably forget when they add/remove sites on the server. The reason I'm using rsyslog's imfile is that Apache doesn't appear to let you log to file and syslog. And I want to keep vhost-specific log files on the web server. So how can I do this? Is there a way of having rsyslog produce local log files and forward the logs to a remote collector? I am prepared to change my Apache config to log to a single access/error log for all vhosts, so long as there are vhost-specific log files produced somewhere on the web server machine. I just don't want to lose any logging info if the remote log collector can't be contacted for any reason. Any comments/suggestions? Cheers, B

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• Switching between taskbar tasks sequentially

  - by Doug Kavendek

  In Firefox and some other tabbed interfaces, I can use Ctrl-PgUp/Down to cycle through tabs sequentially, based on their order in the tab list. I associate what is what based almost entirely on its position along the tab bar and what is next to what, so this is extremely useful for the way I keep track of things in my head. However, I haven't been able to find an equivalent for actual taskbar items in Windows, such that with a single shortcut will switch focus to the task item either to the left or the right of the current task in focus. There's a lot of existing shortcuts that I use (Alt-Tab, Ctrl-Esc, and their counterparts), but these use the window manager's stacking order, so it always changes based on what you've switched between in the past, and so their usefulness generally only lies in switching between two apps -- above that, I just can't keep that kind of stack in my head. The closest shortcut I've found is Winlogo-Tab, but it only moves a selector on the taskbar, so you have to hit space after moving it, and it also seems to originate the selector from the leftmost item every time (rather than relative to the current item). Am I just a weirdo and will have to write my own app to perform these actions?

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• adding a custom user folder on Ubuntu

  - by Narcolapser

  Question: How do you add a custom folder to the collection of user folders that come with Ubuntu? Info: I just loaded my netbook with Ubuntu Desktop 10.04LTS (Desktop because it is an aspire one and the Apocalypse seems to follow when ever i try to install netbook remix onto it). It comes with standard folders like Documents, Music, Pictures, Downloads(though this one doesn't appear until you actually download something), Videos, etc etc. These are handly little folders because they have little symbols on them and are nicely located in my file browser. it is basically like the folder lay out the windows had in vista. I do a lot of little programing on this computer so i have a folder in which i keep all these single kb code files. Obviously named "Code" that I keep in my home folder. But I would really like to it over listed next to my other user folders. In summary, how do you add a folder to the listing on the file browser. And, if possible, how do you give it an icon? (I understand fully that I will probably have to make said Icon) those two things are what I'm seeking to do. ~n P.s. please correct me if I'm using the wrong name. I just guessed and called them "User Folders" because they were folders the user uses. made sense. but if they have another name like "libraries" please say so. Thanks

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• How to properly remove disk from PERC 6/i RAID controller ?

  - by Stefano Borini

  I have a Dell T710, coming with PERC 6/i RAID controller. The current raid has 2x500 GB hard drives (with the OS), and 6x1000 GB hard drives (in RAID-6, currently empty). I would like to take one 1000 GB disk physically out to keep as an immediate spare in case of a crash, and configure the remaining 5x1000 GB in a single VD RAID-6. This is all nice and clean and works, until I realized that the display on the machine reports the lack of the 8th disk as an error. It's marked as error, but appears to be a warning, since the machine is fully functional. My question is: what is the best way to keep one disk as a spare out of the array? should I disassemble the disk from the cradle and insert the empty cradle in the array ? Or should I just silence the error in the display in some way (how?). I know that what I am doing sounds pretty strange, but here is academia and having a spare disk available could take weeks. Better to have one ready in my drawer for any emergency.

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• Application for time and project management

  - by user10826

  I want to improve the way I organize my projects/tasks/schedule What I do now is: keep an excel sheet with the name of the most important tasks/projects, I look at it at the beginning of each day and decide the ones I will focus on on iCal I write down events for each day, or for a concrete time (13 to 14 hours). I set up each day the tasks I want to accomlish, and allocate them hours I use Things (culture code) to keep info about tasks and projects not very important and which are not time allocated yet (GTD name = someday) I use Mail on Mac and create folders for the mails I want to process with the name of the different projects I save the main info for each project on freemind maps My system works well at the moment but it is pretty complicated to use. I want to make it better and I am looking for something with these requirements: must be 100% offline accessable it should use as less programs/resources as possible, ideally just one program should be able to manage all my info I can use the GTD methodology mixed with priorities and I can allocate each task converted to event on my calendar I can have different daily/weekly, etc views on a calendar to see the "big picture" must run on mac os x leopard price does not matter, I will pay for this So, according to your experience, can you recommend me something like this? Thanks

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• Backup Exec tape rotation guidelines

  - by HannesFostie

  Hi We use Backup Exec to take care of our backups for our data server, exchange server, and one more set of systems. Each of these 3 is being done on a separate "set" of tapes. Our goal is to be able to roll back a full 2 weeks, with 1 full backup each weekend and differential/incremental backups in between (the difference between the two in our case isn't very big, because the employees mostly use a very similar set of files throughout the week). While playing around with the settings on how to achieve this, we set the time for BE to keep the full backup to 14 days, but because we have too much data this would require manual intervention each time to erase a certain tape and use that. What I would like to know is what kind of guidelines, tricks, tips and general "stuff to think about" you keep in mind when designing your backup schedule. The type of backups (full/diff/incr) isn't of that much importance in our case as it's more or less set in stone. Made this community wiki as it's not a very specific question. Thanks in advance!

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• How to manage multiple email addresses on multiple domains in Exchange

  - by CAD bloke

  Using Hosted Exchange Server, mostly because I use an iPhone, webmail & Outlook on 2 laptops. I want to keep everything consistent and unfragmented. Also, I want push notifications. I have 2 domains, a professional one & a personal one. Each domain has about 5 (give or take) email addresses I use for various purposes. Each domain also has a few parked domains (.net, .org, .info) aliased to the .com domain. I would like to keep emails from the 2 domains separated. Do I need an extra mail box, meaning extra expense or can I create another Exchange user on the same mailbox and create an extra account in Outlook? In either case I will have to wait for iOS4 on the iPhone to manage 2 Exchange accounts. Or am I better off just using a set of rules and folders? The aliased domains are another joy to behold entirely. It looks like I will have to add each email address variant individually. Alternatively, I reckon I may just leave the aliased domains at the pop3 host and let Outlook gather those as edge-cases. Surely I can't be the only one making my life this difficult. Anyone out there done this? From the left field - is this (much) easier in gMail? I'm not committed to Exchange (yet). Previously I used Outlook as a pop3 client with a set of filters to direct incoming traffic to folders. This worked with the aliased domains because my host directed all the aliased TLDs to the same mailbox.

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• How do I rename my old Program Files folder?

  - by SteveJ

  I installed a new SSD as my boot drive (C:), installed a fresh version of Windows 7 64-bit, and kept my existing SATA drive in the system (D:). I want to keep using my D: drive for file storage (no sense filling up the SSD with stuff that isn't performance critical) and I haven't formatted the D: drive because there's stuff on there I want to keep. I also want to create a new "D:\Program Files" folder so I can install apps that aren't performance-critical there. So I decided I'd rename the existing "D:\Program Files" from my old Windows install to "D:\Old Program Files" and then create a new "D:\Program Files" directory. Easy, right? I can see "D:\Program Files" just fine in Explorer. I right click, select Rename, and type "Old Program Files." I get the alert that says I need Admin permission to do this, so I press the confirm button with the shield. But the folder still appears as "Program Files" in Explorer. I jump out to the command line, and it appears as "Old Program Files" when I do a dir. I can even do mkdir "Program Files" and when I do a dir they both appear. But in the Explorer GUI, it looks like I have two "Program Files" folders. This will be confusing during app installation because I won't be able to tell which one is which. I've tried poking around in the properties tab of the old folder, but can't find anything that would explain what's causing the issue. How do I rename the old Program Files folder?

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• FFmpeg convert video w/ dropped frames, out of sync

  - by preahkumpii

  I recorded a video using Bandicam with the MJPEG encoder to get the least amount of lag. Now, I am trying to convert that massive file to a h264 avi using ffmpeg. I know there are dropped frames in the video stream...more than 100 in the first two minutes, which I assume is simply because Bandicam dropped some when it couldn't keep up. So, when I convert the file to h264, the video and audio are out of sync, and appear to be more and more out of sync as output video progresses. Here is my basic command in ffmpeg: ffmpeg -i "C:\...\input.avi" -vcodec libx264 -q 5 -acodec libmp3lame -ar 44100 -ac 2 -b:a 128k "C:\...\output.avi" I have tried EVERYTHING I can think of including: -itsoffset [-]00:00:01 Tried this before and after input file. This doesn't work because as the video progresses it becomes more and more out of sync. -async 1 Doesn't work. -vsync 1 Doesn't work, but it does show dropped frames being duplicated. Two inputs of same file with mapping using -map 0:0 -map 1:1. Doesn't work. The source plays just fine. Any ideas how to convert it with ffmpeg and keep the audio and video synced? Thanks.

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• Good process/software for organizing photos past/present

  - by Matthew

  So I have tons of photos taken all the time. I have a lot from years past that I never went through (meaning deleting duplicates, etc). I've got a new pc with windows 7, and I'm wondering what a good process is to organize those photos. They're in folders that have really no meaning (it used to be people would put them in a folder wherever, even the desktop or somewhere else, not just the My Pictures folder). I'm going to keep all pictures in the "My Pictures" folder from now on. I've used Picasa from g=Google, and it works great. Is this the recommended free software for this? What process do I use to move the old pictures over in to new "organized" folders? Lately in Picasa when I import off my camera card, I would just select something that names the folder after the date it was taken. Is this advised? Just give me ideas on how to stay organized with photos. Should I tag them also? Should I rename the file names? Keep in mind I have over 16,000 photos I'll have to go through, so it can't be anything to thorough.

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• Proper end of day sequence to maintain monitor config

  - by WarmBeer

  I've got an HP EliteBook 6930p that travels from home, where it is connected to individual cables, and work where there is a docking station. At both locations I have an external monitor as the secondary monitor and like to have the laptop screen as the primary, i.e. with the task bar. At the end of the day I close the laptop, which is supposed to set it to standby. When I get home I plug in the power cord and the external monitor cord and open the computer. When heading into work I close the computer and unplug everything. Inevitably when I open the computer at the new location the monitors are reversed, i.e. the primary, task bar display is on the external monitor and the laptop shows the secondary, even though when i click identify the laptop has the 1. I then have to disable the secondary display, switch the primary to the laptop and re-enable the secondary. I've tried locking the computer before closing and occasionally that works to keep the setup in place but not always. Any suggestions for how to keep the config in place during transport? ed

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• How to set up daisy-chained routers for separate sub-nets?

  - by joe

  This question seems to be similar to others, but I'll take a shot anyway. A client recently switched ISPs from TDS to Comcast Business Class. Before the switch, they had 5 static IP addresses assigned. Now they'll have a single IP address that will change whenever Comcast decides to do so. The issue is that this internet connection will be shared among two companies, both having (and wanting to keep) their own private subnets. Because TDS was supplying multiple IP addresses to the one location, this allowed me to put each router on the switch. Now, with Comcast, they only get one IP address, meaning there has to be a main router before the subnet routers. Luckily, the cable modem has a built-in router, which I would like to connect to each company's router, and still have DHCP enabled on all accounts. Question: What do I need to do to the subnet routers to keep them separate from each other, but still allow internet access from the main router. I would love to say "I tried this", and give you links, but everything I find on the internet only mentions daisy-chaining routers with DCHP disabled.

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• How to stop NAT dropping idle connections?

  - by WGH

  I have a TCP connection that can be idle for many hours. The traffic is flowing from the server to the client only. One might say it's kind of push notification. My home router, however, tends to drop the connection silently after 20 minutes (the value of /proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established). The server detects the loss once it tries to send anything (I assume it receives RST from the router itself). As client never sends anything, it never detects the loss. RFC 5382 "NAT Behavioral Requirements for TCP" states the following: A NAT can check if an endpoint for a session has crashed by sending a TCP keep-alive packet and receiving a TCP RST packet in response. It makes sense. It's much more effective than sending keep-alives by the host itself (as only NAT knows its own timeout). And probably not hard to implement. Is there any NAT solutions implementing this? It would be great if there was a way to enable this in iptables.

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• How to backup a large FreeNAS?

  - by Ze'ev

  We have a 12TB FreeNAS box in the office, and are looking for a way to keep a backup of it offsite. We're considering (1) tape; (2) a bunch of bare drives (popped into a spare hotswap bay); (3) external drives. Any advice on which solution is best? (Online backup is not an option because our internet connection is too slow.) And, is there some software that will keep track of which files have been backed up and which haven't? So that when one backup unit fills up, we can continue the backup on the next? (We don't want to have to back up to a 12TB device.) This software could run, preferably, on the NAS itself; or from one of our Mac clients. Our goal is a situation where we attach some backup device; it automatically fills up with stuff from the server; the contents of this unit are catalogued somewhere something prompts us to replace with a fresh drive/tape; backup continues until full, including any files that have changed since being backed up.

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• Hardware issue, bsod with windows xp irq and strange messages with ubuntu

  - by JP Hellemons

  I have an old Acer T160 and it used to run Windows XP. But I keep getting random BSOD's. I keep seeing IRQ conflicts. I tried to run ubuntu, which runs and keeps running. But sometimes is not responding. Also there are these popups at ubuntu 12.04 that my network cable (which is onboard) is unplugged. But I have no cable in it! and have an usb dongle for wifi. which also seems unstable. have to (auto)reconnect sometimes. So my question is: is it my mobo, power supply or something else? FYI: I had an dvd-rw station which did not open properly, so unplugged the ata and power, als removed the second harddrive. now only have sata harddrive. also removed the extra video card (ati sapphire x1600 pro) so use only onboard video now and still have these issues. EDIT Update: will try with a new PSU (power supply unit of 400watt) the old (factory) one was 300watt. and will use a usb drive which has 12.04 ubuntu on it (made with unetbootin) to format everything and re-install ubuntu. (so also delete mbr partition) will update the day after tomorrow.

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