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• D-LINK 2450U DSL router: Port forwarding forwading to the modem itself, not the specified IP

  - by axk

  I found a similar question but it has no satisfactory answers. I have a D-LINK 2540U DSL router. It has a basic port forwarding(under DNS - Virtual Servers) configuration in the administration panel where you specify: external port range, protocol, internal port range, server IP address and it is supposed to forward that port to that IP address. When I first set it up for a Real VNC connection it worked fine, just as I expected. Then I added a DynDNS configuration entry in the router's 'Dynamic DNS' section and added an additional SSH (22) forwarding rule. The SSH forwarding also worked fine (now with the dynamic hostname, but I suppose it doesn't make any difference as far as SSH is concerned). Then I removed the SSH rule and after that the VNC forwarding stopped working with the VNC client failing to connect (I have tried to connect with telnet and it also failed to connect, so it wasn't a VNC problem). After adding a rule for port 80 it turned out it would forward on port 80 though not to the specified server IP but to the modem itself. At least it is what it looks like, because it gives me the administration panel when I connect to my external IP (both using a browser and plain telnet in which case I can see that it is mini_hhtpd sitting on the port, which is obviously the modem's administration panel). Have anybody encountered a similar problem with port forwarding? I have tried to do a reset through the administration panel and to restore a backup of the settings made before I started playing with port forwarding, but it didn't help. Should I do a 'hard' reset with the button on the modem? Is it any different from the administration panel's reset (Restore default)?

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• High mysql server load, sar output

  - by eric

  I have a MySQL Server that should be performing better than it seems to be. We're running ubuntu on a Amazon Cluster Compute (cc1.4xlarge) Linux ip-10-0-1-60 3.2.0-25-virtual #40-Ubuntu SMP Wed May 23 22:20:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise I have several output files from sar that i'm not really sure how to interpret. For example, I ran: # Individual block device I/O activities sar -d 1 180 > logs/block_device_io.log & which gave me what looks like really high utilisation of my disk (turns out this block device maps to /dev/xvdh on /var/lib/mysql type ext4 (rw,_netdev) The output from my log: 10:48:59 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 10:49:00 PM dev202-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev202-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev202-112 1008.00 31040.00 1416.00 32.20 1.02 1.01 0.89 90.00 10:49:00 PM dev202-80 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Am I wrong in thinking this is a problem? I have it above 90% almost the entire time we're seeing slowness. Or does this just mean MySQL is doing what it's supposed to do?

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• NAT, iptables and problematic ports

  - by Rajie

  I am building a small office network with virtual machines. My schema is this: Computer A: gateway, ip 1.1.1.1, iptables used for NAT [eth0=public internet dhcp, dhcp; eth1=gateway] Computer B: client, ip 1.1.1.2, using gateway from Computer A. NAT is working, and Computer B can access the internet using the A's gateway. I redirected some incoming ports from A to B (for instance, if A receives a request to port 80, it goes automatically to Computer B's Apache). The thing is that I do not really understand how to open/close ports for Computer B from Computer A. I know how to close a port: iptables -A INPUT -p tcp --dport 80 -j DROP And it will refuse all incoming (not output) connections to port 80. However, this works for main interface eth0. I tried to, for instance, drop ingoing and outgoing connections for Computer B, port 80: iptables -A FORWARD -i eth1 -o eth0 -p tcp --dport 80 -j DROP iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 80 -j DROP But it does not work. And I cannot figure out what I am doing wrong. Any clue?

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• On a dual-GPU laptop, is using the discrete GPU ever more power efficient?

  - by Mahmoud Al-Qudsi

  Given a laptop with a dual integrated/discrete GPU configuration, is it ever more power efficient to use the discrete GPU instead of the integrated? Obviously when writing an email or working on a spreadsheet, the integrated GPU will always use less power. But let's say you're doing something graphics-medium but not graphics-intensive/heavy - is there a point where it actually makes sense to fire up the discrete GPU, not for performance but for power-saving reasons? Off the top of my head, I can think of a scenario where the external GPU supports hardware decoding of a particular video codec - I'd imagine there is a "price point" where using the GPU saves more energy than decoding that fully in software would. But I think most GPUs, integrated or discrete, pretty much decode just the plain-Jane h264. But maybe there is something more complicated, perhaps if you're doing something like desktop/windowing animations or a flash animation on a website (not an embedded flash video) - maybe the discrete GPU will use enough less power to make up for switching to it? I guess this question can be summed up as to whether or not you can say beyond doubt that if you don't care for performance on a laptop with two GPUs, always use the integrated GPU for maximum battery life.

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• Openpgp does not work in my Thunderbird-Installation

  - by zerozero

  Hello community, as mentioned above - i encountered serious troubles. here are the versions of the related software: SuSE 11.2, Thunderbird v.3.1.6, released October 27, 2010, Firefox 3.6 v3.6.12 I created an installations with an own partition both for the user and for the TB-Mails. For a new installation on another hardware i took these partitions. When i wanted to read the emails, i got an error-message like this: The GPG-agent for your GnuPG-version 2.0.12 couldn´t get started Further i got an error message for the access on services of enigmail. The file jar:file:///usr/lib/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/{847b3a00-7ab1-11d4-8f02-006008948af5}/chrome/enigmail.jar!/locale/de-DE/enigmail/help/initError.html couldn´t get found. I found out, that this path doesn´t come from TB nor from firefox, but from enigmail. I installed several (un-)pack-programs. the only effect was, that in the menu of TB the entry for OpenPGP appeared in the TB-Menu. The errors as described above repeat at every try to read an email. I deleted and re-installed enigmail, but the errors dont´t disappear. What can i do to get rid these error-messages ? Thanks in advance

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• Changing externally visible IP on a multi-IP router?

  - by AlternateZ

  I work at a public library and I'm trying to configure OCLC's EzProxy software. I've run into a problem and I think it's related to our network config. I'm punching above my weight here a little so I need some help. I think I'm trying to configure a 1:1 NAT, but not sure how or if our hardware supports it. The EzProxy machine is on an internet line which supports multiple external IPs. Our router is a Billion BiGuard30. There's another server on this line, let's say its IP is x.x.x.9. The EzProxy machine is x.x.x.11 I've set up port forwarding from x.x.x.11 on the http ports to the EzProxy machine. Trying to browse to x.x.x.11 from an external PC works fine - we get to the EzProxy page we are serving. However, if we go to something like WhatIsMyIP from the EzProxy machine, it says that its IP is x.x.x.9. This causes problems with our user authentication software. How do we make the rest of the internet see that the machine is x.x.x.11? There doesnt seem to be any "outbound port forwarding" on the Billion router, nor is there any "1:1 NAT" options in its config webpage. The EzProxy machine is running Ubuntu 12.04, if that helps.

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• ESXi 4.0 Guests Locking up

  - by Brendan Sherwin

  I installed ESXi 4.0 on an HP Proliant g5 with a 64bit Xeon processor and took advantage of the free license as I work for a public school. I created two instances of server 2003 from scratch, one to be the DC, DHCP, the other to be a file server and DNS/DHCP backup. I had both guests up and running fine, setup my user accounts, transferred the data, etc etc. Once I joined a client machine to the domain, I would find that both of my Windows guests would lock up. Sometimes it would be for five or so minutes, once it was overnight. The "locked up" state means that as far I could tell, all services were stopped; dhcp no longer handed out IP's, DNS stopped working, I couldn't RDP into the server. The ESXi host, my HP server, was still running fine. VSphere was working, and I could look at the performance of the individual guests.I would try Powering off the hosts from inside VSPhere, and the hosts would start powering off, but get stuck at 95%, and stay that way, sometimes only for 10 minutes, others for hours. Several times I had to restart ESXi from it's console in order to restart my machines. Now, can anyone tell me what is happening, and how I can fix it, or take steps to prevent it? I hired a consultant to come take a look at it, someone who's experience and knowledge I trust, and he told me he had never seen anything like this ever before. He spoke to a friend of his who is VM certified, and he also said he had never heard of this issue. Thanks for your replies, and I'll do my best to respond ASAP. Currently, the server is powered off, and I've reinstituted my nine year old Server 2000 boxes, and I'm considering installing ESXi 3.5. Does anyone know a host created in 4.0 will work in 3.5? I'd really like to avoid having to rebuild those accounts! I know 4.0 works on this server, as I have another server in another school with the same exact hardware running 4.0 fine. Brendan

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• Migrate Windows Server 2008 to a new hard disk 2

  - by MainMa

  Hi, A few weeks ago, I already asked how to move a Windows Server 2008 to a new hard disk. Despite the previous answers and two weeks lost trying to do it, I am always unable to move the OS to the new drive. What I tried: A backup/restore using Windows Backup. This never helped. First, I tried to backup, then copy the backup to a new drive, then restore. This results in "The parameter is incorrect. (0x80070057)" error caused by a bug in Windows Backup. Recently, I attempted to backup to a network share, but I can't restore from it, because of a "*The network path was not found. (0x80070035)" error. Trying the netsh interface ipv4 set address [...] does not work neither (saw at least three different errors, mostly "The interface is unknown.") A previously suggested solution using imagex from Windows AIK results in a non-bootable disk after writing an image to it. When booting from Windows 2008 installation disk (from USB), it finds that the HDD is not bootable and proposes to fix this, but then crashes, resulting in an unbootable USB flash disk (and HDD stays unbootable). As I said in my previous question, doing a clone of a hard disk drive gives an (of course) bootable disk, but Windows complain about hardware changes and cannot start. Now can somebody suggest me another way to move Windows Server 2008 to a new hard disk? Is it at least possible to do, or any hard disk failure/change implements necessarily to reinstall the whole OS?

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• How can a CentOS 6 guest running in VirtualBox be configured as a LAMP server that can be accessed from the Windows host?

  - by jtt89

  I was able to conect Centos6 on Virtual Box to Windows (I can ping in both directions) with Host-only Adapter (for connection between the two) and NAT Adapter (to enable Linux on VB to connect to the Internet). I want to set up httpd, mysql and vsftpd servers and in the end easily connect to httpd from Windows based browser and ftp server with a Windows based client as well. I would also want to have access through SSH. I have a general idea of the steps that are involved, but there is also a configuration that I am not sure about at this point. Lets say I follow these steps: yum install httpd yum install php php-pear php-mysql yum install mysql-server mysql_secure_installation yum install vsftpd yum install mod_ssl Technically I have everything installed, but what would be the next steps that I need to take (from the networking point of view, so to speak) to get it all working)? I know I need to configure, at least Apache, and ftp server, but I am not sure how is it gonna work; like where am I gonna be uloading the sites (I know this can vary), how am I gonna know what address to use in a browser if I wanna go to a website x, y, z on that installation etc. This sounds like I need to do some kind of DNS setup and I am kind of stuck at this point. If somebody could give me a general outline of what are the things that need to be done that would be great (I was looking at a lot of websites and I know about etc/sysconfig/network, httpd.config - not too much about it on Apache's site, hostname, hostname -f etc; but it is kind of hard to piece it all together at this point). I am gonna be looking at the books also, but they not always reflect the setup that I have too (VirtualBox). Thank you.

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• pfsense 2.0.1 Firewall SMB Share not showing up under network

  - by atrueresistance

  I have a freenas NAS with a SMB share running at 192.168.2.2 of a 192.168.2.0/28 network. Gateway is 192.168.2.1. Originally this was running on a switch with my LAN, but now having upgraded to new hardware the Freenas has it's own port on the firewall. Before the switch the freenas would show up under Network on a windows 7 box and an OSX Lion box as freenas{wins} or CIFS shares on freenas{osx} so I know it doesn't have anything do to with the freenas. Here are my pfsense rules. ID Proto Source Port Destination Port Gateway Queue Schedule Description PASS TCP FREENAS net * LAN net 139 (NetBIOS-SSN) * none cifs lan passthrough PASS TCP FREENAS net * LAN net 389 (LDAP) * none cifs lan passthrough PASS TCP FREENAS net * LAN net 445 (MS DS) * none cifs lan passthrough PASS UDP FREENAS net * LAN net 137 (NetBIOS-NS) * none cifs lan passthrough PASS UDP FREENAS net * LAN net 138 (NetBIOS-DGM) * none cifs lan passthrough BLOCK * FREENAS net * LAN net * * none BLOCK * FREENAS net * OPTZONE net * * none BLOCK * FREENAS net * 192.168.2.1 * * none PASS * FREENAS net * * * * none BLOCK * * * * * * none I can connect if I use \\192.168.2.2 and enter the correct login details. I would just like this to show up on the network. Nothing in the log seems to be blocked when I filter by 192.168.2.2. What port am I missing for SMB to show up under the network and not have to connect by IP? ps. Do I really need the LDAP rule?

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• mod_proxy incorrect redirect behaviour

  - by Kevin Loney

  In chrome this configuration causes an infinite redirect loop and in every other browser I have tried a request for https://www.example.com/servlet/foo is resulting in a redirect to https://www.example.com/foo/ instead of https://www.example.com/servlet/foo/ however this only occurs when I do not include a trailing / at the end of the request url (i.e. http://www.flightboard.net/servlet/foo/ works just fine). <VirtualHost *:80> # ... RewriteEngine On RewriteCond %{HTTPS} off RewriteCond %{REQUEST_URI} ^/servlet(/.*)?$ RewriteRule ^(.*)$ http://%{HTTP_HOST}$1 [R=301,L] </VirtualHost> <VirtualHost *:443> # ... ProxyPass /servlet/ ajp://localhost:8009/ ProxyPassReverse /servlet/ ajp://localhost:8009/ </VirtualHost> The virtual host on port 443 has no rewrite rules that could possibly causing the problem, the tomcat contexts being referenced do not send any redirects, and if I change the ProxyPass and ProxyPassReverse directives to: ProxyPass / ajp://localhost:8009/ ProxyPassReverse / ajp://localhost:8009/ everything works fine (except for the fact everything from www.example.com is being passed to the proxy which is not the behaviour I want). I'm fairly certain this is a problem with the way I have my proxy settings configured because I did log all the rewrite output coming from apache and it was all correct.

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• Advice on networking career

  - by fmysky

  Hello! I need some insights on a networking career. I have a valid CCNA and few months of experience as a Jr. network analyst. My focus is a type of job where I can administer networking/storage hardware and possibly managing servers/workstations too. I am new to this job area, specifically new to city like LA. I am currently unemployed and so, my question is: should I continue with my cisco certifications(routing/wireless) or other comptia certs or both to get a reliable job? I am really interested in CCNA wireless but watching craigslist(LA) and other job sites, it seems people need more cisco voice people. While, some others also ask for Net+ certs. I have scarce financial sources so, its better to make some good decisions. I have not been applying yet due to some personal problems but I will soon. Thank you! P.S. I don't know if I can ask questions like this here. Sorry about that.

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• Can't view other computers on Network

  - by Darkart

  Systems: My Machine: Windows 7 Ultimate connected through ethernet into router Her Machine--Other Machine: Windows 7 Ultimate connected through wireless Router:F5D8236-4 N Wireless Router Version 1 Firmware: 2.01.03 (Apr 28 2009) ISP: Comcast Problem: I can not view the "Other Machine" on the network at all. I opened command prompt and ran net view and saw the pc name. I tried pinging the pc and it times out. Went inside the router and tried viewing the computer on the DHCP list and it can not be seen. I restored the router back to default settings and firmware and completely reset the modem and router, and created home group. I went to the other machine to configure home group settings and made sure that both PC's had identical settings. She was able to see my machine but I could not see hers. I restarted both machines and now we cant see each other at all. Also her PC ("Other Machine") had exclamation mark in the wireless icon but was connected just fine. There is no firewalls on currently or anti-virus enabled, and still can not see each other. Right now I am checking for updated drivers for the wireless card, but my question is could it be the router or something hardware related? I have went through all the settings in the Home group and visited most FAQ's and still no luck. Also as it stands I can not view her machine inside the router DHCP Client List :(

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• Random Hard Freeze of Windows 7 (is Kaspersky to be blamed for this?)

  - by Christian Ivicevic

  The last few weeks I experienced a new strange behavior of my computer. Sometimes Windows 7 just freezes with no real reason at all. While listening to music for example the playback hangs and you can hear a very nasty sound. Neither mouse nor keyboard input is handled and everything is just stuck. Using Ubuntu this does not happen, so I think it is just a matter of driver issues or a Windows 7 bug. Furthermore I am really suspicious about Kaspersky (Internet Security 11) and so I let it perform a complete virus scan while no other app is running. At about 50% it happened again and I needed to restart the computer by holding the power button the bad way... A really weird thing is that playing Skyrim this happened once, however music playback did not stop. Only the framerate dropped to 0 and sometimes for a few seconds I am able to move. Therefore I am really confused as furthermore no bluescreen pops up. Memtest told me that everything seems to be alright... Can anyone explain me which data you need about my hardware and software (and which tools tools to use to gather the informatik) to be able to provide any help on my problem?

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• Occasional "Could not load file or assembly" in asmx WebService on IIS and DFS

  - by jesse-mcdowell

  We have a handfull of ASMX web service hosted on two identical Windows Server 2003 boxes. The virtual directory for the web services is loaded in a DFS share, both servers point to the same share. We have a load balancer between the internet and the two web servers. At a seemingly random interval (right now about twice per week) when a user tries to access a method on the web service, IIS returns the error: "Could not load file or assembly" for one of the assemblies used in the method call, and will continue reporting it each time the method is called until the app pool is recycled. We haven't found any distinguishable pattern to the problem. This is what I know: the missing assembly varies (but it's always a home-brew assembly) the Web Service method that fails varies there is no noticeable pattern to the times or intervals where the problem appears there are no admin users accessing the servers when the problem appears the failing method will work correctly on one server and fail on the other, even though both point to the same bin folder the problem can always be corrected by recycling the app pool and making no other changes I have enabled the Assembly Binder Log, and know that the binder is looking in the correct location for the file. Our assemblies are compiled for .Net 3.5.

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• SSH session closing whilst virtualenv session stays open (I think)

  - by ing0

  I've been developing some sites using Flask recently (running on debian within a virtualenv), and when I am testing I can run it on a port, let's say post 5000. So I run the script like so: . env/bin/activate <- go into virtual environment python file.py <- run python script And I will be given this message: Running on http://0.0.0.0:5000/ So this all works great and I can access my site on this port fine. However... my rubbish ISP always does this thing where it resets something around 1am every morning. I have no idea what this is, everything runs like normal but I always get disconnected from any SSH sessions open. This leaves it running and all I can do is call: lsof -i Which will show me the process but if I kill it and then rerun it things get weird. The: Running on http://0.0.0.0:5000 message still shows but I cannot connect to it anymore. I've tried changing the port number and it seems the only thing that works is trying again later on or on another day. Now I'm assuming that something on my server resets inbetween these times and I would like to think it was maybe that virtualenv session timing out, but I cannot find out how to do this manually, does anyone know?

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• PXE booting LACP hosts on Force10 S50N with FTOS

  - by lolwutreddit

  Hardware: S50N Firmware: FTOS 8.4.2.6 Problem: We're trying to PXE boot some servers that are connected via port-channel interfaces with LACP. Current Work-around: we PXE boot a server with a single interface (eth0), and then use a Perl script to turn up the port-channel interfaces after the server is built. Details: Is anyone doing anything similar on Force10 S50 switches with FTOS? If not, is anyone doing this on another S series, or larger chassis-based Force10? I'm wondering if Native VLAN will solve this, since ports in a port-channel cannot explicitly have a VLAN set, and they don't seem to use the tagged or untagged VLAN that the port channel is in. I will confirm this next (I think it's the only thing I haven't tried) Juniper Example: http://broken.net/openindiana/how-to-pxe-boot-systems-on-lacp-using-juniper-switches/ Cisco: there are plenty of documented ways to solve this issue on IOS and Nexus Update/Edit: since there seems to be no way to use interface or port-channel mode commands to get the individual interfaces to show up in spanning-tree (rtsp in this case), the ports should never go into a forwarding state. I'm not going to mess with it anymore unless a) someone that has experience passes it on, or b) Force10 comes up with a solution for this (I'm guessing it will only be introduced on other S platforms (S55, S60), since the S50 seems to be near EOL). I'm basing that on the fact that the Open Automation type features are only being supported on the newer switches.

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• How to make DD-WRT router's (configured like a repeater) devices be accessible on LAN? (i.e. integrate DHCP for both routers)

  - by Annonomus Penguin

  I have a D-Link DIR-600-A1 router running DD-WRT (using the 601's firmware: except for the model number, they are near identical). It has an Atheros chip, so there is no "repeater" option. You can bypass this by setting the main radio as a client to the main router, and adding a virtual radio configured as an AP. You can then set up the credentials for connecting to the main router and allowing devices to connect to the repeater/router. I have a few devices on my network: Ethernet computers Server with Samba running WiFi devices connected to the main router I then wanted to add a repeater. I have a couple of other things on the repeater: WiFi Computer Other WiFi devices. Anyway, I wanted to connect my WiFi computer to the share on my server via Samba. However, for some reason, my router treats the main router as WAN, not another device. I've tried disabling the SPI firewall: However, that doesn't work. I've tried pinging my WiFi computer from my server. However, I can ping my server from my WiFi computer. AFAIK, they are on the same subset, just using different IPs: the main one uses 192.168.0.x and the repeater uses 192.168.1.x (starting at 100 for some reason). It seems as I need to configure my router(s) to work together for DHCP. I noticed there was a "DHCP forwarder" option, but I have no idea what that would do. A quick note: for some reason (that's beyond me) my ISP disabled the capability to bridge a WiFi to ethernet connection with the router they provide (something about PPPoE or similar...). The service rep I talked to when I was having issues after I changed ISPs said that, but they couldn't explain exactly what they were "blocking." How can I get DD-WRT to not treat the client connection as WAN and the router to recognize the devices connected to the repeater?

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• Multiple vlans access to shared pbx system

  - by Matt

  I'm new to networking and was looking for some assistance. First off I'm using packet tracer to diagram my scenario as I will be receiving my equipment next week to deploy. Hardware to be used: 2 catalyst 3560 switches all connect to a sonic wall router I have two companies that work in the same office space. I need to keep these companies separate on their own vlan. They will however need to share the phone system. (Packet tracer file uploaded to give those who have the time to see what I put together.) http://dl.dropbox.com/u/86234623/network%20build.pkt Here is my current test scenario: on switch 0 I have: company A on vlan 2 computers 172.16.1.100 and 101 255.255.0.0 FA0/10 FA0/11 company B on vlan 3 computers 172.16.2.102, 255.255.0.0 FA0/12 PBX on a trunk port 172.16.0.5, 255.255.0.0 FA0/5 trunk port on FA0/1 to connect the switches on switch 1 I have: company A on vlan 2 computers 172.16.1.102, 255.255.0.0 company B on vlan 3 computers 172.16.2.100 and 101, 255.255.0.0 trunk port on FA0/1 to connect the switches I can ping the respective computers on the same vlan but cant ping company A to B which is what I want. However neither company can talk (ping) the PBX. Here are the commands I used to configure what I have: switch 0 en conf t vlan 2 name A vlan 3 name B int fa0/10 switchport mode access switchport access vlan 2 int fa0/11 switchport mode access switchport access vlan 2 int fa0/12 switchport mode access switchport access vlan 3 int fa0/5 switchport trunk encapsulation dot1q switchport mode trunk switchport trunk allowed vlan 1-3 int fa0/1 (to connect the switches) switchport trunk encapsulation dot1q switchport mode trunk switchport trunk allowed vlan 1-3 Switch 1 en conf t vlan 2 name A vlan 3 name B int fa0/10 switchport mode access switchport access vlan 3 int fa0/11 switchport mode access switchport access vlan 3 int fa0/12 switchport mode access switchport access vlan 2 int fa0/1 (to connect the switches) switchport trunk encapsulation dot1q switchport mode trunk switchport trunk allowed vlan 1-3

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• ZFS - destroying deduplicated zvol or data set stalls the server. How to recover?

  - by ewwhite

  I'm using Nexentastor on a secondary storage server running on an HP ProLiant DL180 G6 with 12 Midline (7200 RPM) SAS drives. The system has an E5620 CPU and 8GB RAM. There is no ZIL or L2ARC device. Last week, I created a 750GB sparse zvol with dedup and compression enabled to share via iSCSI to a VMWare ESX host. I then created a Windows 2008 file server image and copied ~300GB of user data to the VM. Once happy with the system, I moved the virtual machine to an NFS store on the same pool. Once up and running with my VMs on the NFS datastore, I decided to remove the original 750GB zvol. Doing so stalled the system. Access to the Nexenta web interface and NMC halted. I was eventually able to get to a raw shell. Most OS operations were fine, but the system was hanging on the zfs destroy -r vol1/filesystem command. Ugly. I found the following two OpenSolaris bugzilla entries and now understand that the machine will be bricked for an unknown period of time. It's been 14 hours, so I need a plan to be able to regain access to the server. http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6924390 and http://bugs.opensolaris.org/bugdatabase/view_bug.do;jsessionid=593704962bcbe0743d82aa339988?bug_id=6924824 In the future, I'll probably take the advice given in one of the buzilla workarounds: Workaround Do not use dedupe, and do not attempt to destroy zvols that had dedupe enabled. Update: I had to force the system to power off. Upon reboot, the system stalls at Importing zfs filesystems. It's been that way for 2 hours now.

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• Setting up a PC for the Kids

  - by Martin Clarke

  I recently finished building a new PC from scratch; and then I decided to treat myself to a new widescreen monitor. I'm left with a bit of a conundrum with what to do with my old box. I'm considering a few options such as a file server, putting Linux on it, putting it elsewhere in the house or giving it to a member of the family and so on. But to be honest, I don't really think it would get much use. I've started thinking about putting together something for my kids. The oldest is coming up on 4 in a couple of months and he's used my PC and Macbook (supervised!) before for playing jigzaw puzzles, babysmash and so forth. He's also uses the computer at his nursery (Kindergarden for North Americans!). So, its got me thinking about setting something up for him (bonus for his brother who is 2). I was wondering what others had done when trying to put together something for their kids? Some points for consideration: Operating System? Software? Anti-virus Internet (probably blocking?) Hardware (I've seen some keyboards designed with kids in mind)

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• Please insert a disk into SD/MMC - Vista problem [closed]

  - by Naunidh

  Possible Duplicate: Please insert a disk into SD/MMC - Vista problem Hi I tried pushing my 2GB micro SD card using the inbuilt card reader. On clicking the drive I get "Please insert a disk into SD/MMC". This problem is really frustrating. The card works fine on other computers so does the microSD to SD attachment. I have done following o fix. - Updated Vista and installed SP1. - Updated the TI drivers for FlashDrive. - Checked Vaio site for updates (none required). - Added a new entry HKLM\SYSTEM\ControlS* et001\Services\tifm21\Parameters/SDParam=1 took the hint from (http://tinyurl.com/nk33tp) I have restarted the PC multiple times. As soon as I put the card in, the SD/MMC device icon blips, so it seems the hardware is at least detecting something. The card reader was working fine few days back. I guess some windows update has broken something, does any one have any idea on how to proceed. MY laptop is VGN-N365E.

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• DIY NAS - links for Instructions

  - by Kaushik Gopal

  Good folk of SU, I'm planning to build a NAS (Network Access Storage). I'm planning to do it cheap (:read Old PC Config + Open source software). I was looking for good DIY links . Before you shoot this down as a Repost, I'm only looking for good links containing detailed instructions for setting up a NAS. I did a fair bit of searching and found these links (so please suggest others. While these links are great they delve more on the hardware side, i'm looking for more instructions in the software side). For the sake of the interwebs: Ubuntu: http://snarfquest.com/wiki/index.php/Setting_up_a_Home_NAS http://www.smallnetbuilder.com/content/view/27962/77/ http://jonpeck.blogspot.com/2006/11/how-to-configure-80-fileserver-in-45.html FreeNAS http://www.smallbusinesscomputing.com/webmaster/article.php/3719706 http://www.codeproject.com/KB/system/homemade_nas.aspxhttp://www.codeproject.com/KB/system/homemade_nas.aspx There was one at rubbervir.us that everyone points to, but apparently the site has gone down. A couple of other queries: Is Printer/Scanner sharing a possibility with NAS devices? Many talk of torrent support with NAS Devices, a little more light on this? Does this mean, an auto download of torrent through a feed into NAS, or just support for storing Torrent download files onto the NAS(don't see the difference between the latter and a normal file tranfer)

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• Put one monitor of a dual monitor windows system into standby

  - by Psycogeek

  Standby not Disabled! When running 2 monitors on windows 7 or Windows XP, I would like to be able to put one of the monitors at a time into standby. The method can be manual. When running 2 monitors , the second monitor is not always needed, shutting off the monitors own power switch will turn off the monitor, that does work Ok. Problems with that are , the delay with the monitor logo at turn on, and the power switch is not very accessable, and the switch might not live forever turning it on and off so many times. Using disable methods like devcon, WIN-P and Display, causes all the windows to properly move to the other monitor. While that is what a person would want to happen so they can get hold of the windows, that is not what I want to happen, and some things on the other monitor have to be re-arranged after a re-enable. By putting it into standby mode, nothing changes other than the monitor going into standby. Disconnecting the DVI cable still can cause the system to (properly) shift all the windows over to the one monitor, just like any of the disable methods do. That makes a mess of the windows, and is so unacceptable, that I would prefer to leave the monitor on, wasting power and the hardware, when it could easily go into standby for some time. For both monitors I am using a "MonitorOff" program that puts both monitors into standby, but I can not find a utility that will put only ONE monitor into standby for the windows system. If someone comes along and suggests "ultramon" you must know for a fact that it will put One of either of the monitors into actual standby. And it does not really suit me to use ultramon, I tested it (it was nice) and I did not feel that it was a program I wanted. The 2 monitors are running off of an ATI 4890 card, they are both hooked up DVI-I, the OS is both Windows 7 (primary) and Windows XP. In addition it would also be interesting to have seperate standby activity timers, and follow mouse kind of standby changes, but any manuel method , shortcut, batch , tray, or gadget kind of operation would be a good start.

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• ESXI 5.1 - Unable to trunk to cisco switch

  - by Lance

  I have configured my esxi host vSwitch1 to use the secondary NIC on my VMware host. On vSwitch1 configuration I have set the VLAN to 4095 which specifies to allow all VLANs. If my cisco switch port configuration is set to an access port my server can ping the vlan interface on the switch. If my cisco switch port configuration is set to a trunk, whilst it stays UP UP and CDP information is available, I lose my ping from VMware VM server to the local vlan interface on the switch and I lose any server connectivity to my network. Switch NIC teaming policy to Route based on originating virtual port ID Configuration based on: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006628 interface GigabitEthernet0/42 description Host Port switchport trunk encapsulation dot1q switchport trunk allowed vlan 18,220 switchport mode trunk switchport nonegotiate spanning-tree portfast trunk end Output from ESXI CLI esxcfg-vswitch -l: ~ # esxcfg-vswitch -l Switch Name Num Ports Used Ports Configured Ports MTU Uplinks vSwitch0 128 5 128 1500 vmnic0 PortGroup Name VLAN ID Used Ports Uplinks VM Network 4095 1 vmnic0 Management Network 4095 1 vmnic0 Switch Name Num Ports Used Ports Configured Ports MTU Uplinks vSwitch1 128 4 128 1500 vmnic1 PortGroup Name VLAN ID Used Ports Uplinks VM Network 2 4095 1 vmnic1 Any tips welcome!!!

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