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• Apache mpm-itk Performance

  - by Matt Beckman

  I manage a bunch of VPSs with memory ranging from 1GB to 8GB. Most of these websites are Joomla websites, and the servers must support multiple sites/users/S-FTP. I use mpm-itk almost exclusively (mostly due to it's convenience in these shared environments). However, I'm aware it isn't known for performance, so I need some advice on making it faster. Due to the lack of documentation when I first went the way of mpm-itk, I included only one setting in the config, and that was to limit each user to 50 clients (the rest I left up to defaults): <IfModule mpm_itk_module> MaxClientsVHost 50 </IfModule> Are there any better alternatives available? Are there any settings supported in mpm-prefork or mpm-worker that are also supported in mpm-itk? Thanks!

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• creating a new user Ubuntu

  - by Matt

  I am trying to new user that can sftp on a server....i did this ubuntu@ip-10-112-46-15:~$ sudo useradd jesse -p testPass ubuntu@ip-10-112-46-15:~$ sudo passwd jesse Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully but when i try to login via sftp I cant get in....am i missing something like adding a group or something the answer was PasswordAuthentication yes

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• Microsoft Remote Desktop Services - Android

  - by Matt Rogers

  We have recently started testing Remote Desktop Services. We have deployed the environment using the latest server, Windows Server 2012 R2. We have deployed the Web Access Roles, RD Gateway, Connection Broker Virtualization Host and Session Host. We are running both, Virtual machine-based and Session-based deployments. All of these are working as expected internally and externally when using a Windows workstation as the RDS client, however, the Android client is unable to launch applications. Once you install the app from Google Play you are given a screen to add Remote Resources. After entering the appropriate URL, username and password we see the applications that have been published. Unfortunately, when we attempt to launch an app we get the following error: Connection Error Host not found. Please provide the fully-qualified name or the IP address of the host. We have already entered this information otherwise I don't believe we would be able to see the published applications. I think the error is related to the certificate and how it is being used to connect to the applications. Since this is in our lab environment we have not configured a valid external certificate on the servers and the trusted certificate that is installed on the android tablet points to our internal server / domain name. What I would like to know: Has anyone configured RDS Web Access on Server 2012 R2 and attempted to externally connect an Android or iOS device using the Microsoft supported Remote Desktop client. Are others experiencing the same problem we are? Were you able to resolve the issue? Was it related to the external cert / host name?

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• Short POST data in HTTP

  - by Matt

  We're hosting a customer's Debian Linux web server. It's running a PHP based web application. The server is sitting behind our firewall with it's own virtual interface and port 80 is forwarded internally to a machine sitting in the DMZ. The issue we're having is that when data is posted to the server it seems to be being cut short for some users. It's reproducable for some users on the same box. But the same user sending the same data on the same lan on another PC it works. The data gets cut to around 1140 bytes I'm told. Any idea why this might be happening? The customer is blaming our firewall, but then surely we'd have issues with other services. I'm suspecting it's a problem with the website itself. Suggestions on how to isolate the problem would be of help. Our firewall is Astaro. EDIT: A customer has set the ethernet frame size temporarily to 500bytes on the server. This made it work for now! I know some of the customers are using an internet provider that runs PPPoE

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• Outlook 2007 OST File Indexing and OneNote 2007 Indexing are Broken

  - by Matt

  I'm running Outlook 2007 under Windows 7 Home Premium RTM. My OST file was previously being properly indexed but eventually searches significantly slowed down so I suspected a problem. Searching and indexing appears broken in OneNote 2007 as well as search time is now significantly longer. I brought up the Outlook 2007 Search Options dialog and noticed that my mailbox (running from an Exchange 2007 server) wasn't listed in the "Index messages in these data files:" list box. Next I ran the Windows "Find and fix problem with windows search" wizard which reported no errors. Then I brought up the Windows Indexing Options dialog which shows Outlook listed (as shown here): then clicked Advanced and Rebuilt the index. No dice - the listbox in the Outlook 2007 dialog still didn't show my mailbox. When I clicked the Modify button in the Indexing Options dialog I see the following: When I hover over the "oneindex://..." entry, the alt text indicates "This location is currently unavailable". When I delete it and rebuild the index, this entry returns. UPDATE: Comparison of the last screenshot above with a working PC shows that on the broken PC, the lower half of the dialog lists Outlook but neither Outlook or OneNote are showing in the upper half. The working PC has Outlook and OneNote in both parts of the dialog.

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• Windows Server 2008 Create Symbolic Link, updated Security Policy still gives privilege error

  - by Matt

  Windows Server 2008, RC2. I am trying to create a symbolic/soft link using the mklink command: mklink /D LinkName TargetDir e.g. c:\temp\>mklink /D foo bar This works fine if I run the command line as Administrator. However, I need it to work for regular users as well, because ultimately I need another program (executing as a user) to be able to do this. So, I updated the Local Security Policy via secpol.msc. Under "Local Policies" "User Rights Management" "Create symbolic links", I added "Users" to the security setting. I rebooted the machine. It still didn't work. So I added "Everyone" to the policy. Rebooted. And STILL it didn't work. What on earth am I doing wrong here? I think my user is even an Administrator on this box, and running plain command line even with this updated policy in place still gives me: You do not have sufficient privilege to perform this operation.

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• Can't access Linux machine from the network, network from the machine is fine

  - by Matt

  I'm having issues with a machine that stopped replicating with mysql. It's managed by a guy on another continent but recently I've had to get involved. The server is running Ubuntu server 9.10 I can't log in with SSH, there is no response. On the server itself I can ssh to localhost fine. I thought maybe it's the firewall rules. I'm no expert on IP Tables, but I believe that's not the issue as I removed all the rules. But it still won't let me in. Any ideas? it's acting from other machines as though the service isn't listening, but I know that it is. It's like this for all services.

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• Virtualhost pulling from the same site??

  - by Matt

  I have my httpd.conf on fedora 8 that I am setting the virtual host file. Here is what I have: DocumentRoot "/var/www/html" <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory "/var/www/html"> Options Indexes FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> then below I am trying to setup a vhost to have multiple sites on the server: NameVirtualHost *:80 <VirtualHost *:80> ServerName kadence.tv DocumentRoot /var/www/html/ </VirtualHost> <VirtualHost *:80> ServerName nacc.biz DocumentRoot /var/www/html/nacc/ </VirtualHost> also in the /var/www/html/ directory I have the index.php file for the kadence site...when I do to either site I get the index for the kadence site...any ideas what I am doing wrong EDIT the full contents of my httpd configuration file are here.

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• .NET framework error 0xc000007b

  - by Matt

  I'm trying to install UDK, but I get the error The application was unable to start correctly (0xc000007b). Click OK to close the application. I tried re-installing .NET Framework 4 and MSVC++ Redistributable 2010 x64 with a separate uninstaller, but I still get the same error. I have had this problem both before and after reinstalling Windows 7 x64. I think it might be because UDK is 32-bit and everything else is 64-bit, but there shouldn't be any errors with backwards compatibility. How do I fix this?

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• Determining cause of high NFS/IO utilization without iotop

  - by Matt

  I have a server that is doing an NFSv4 export for user's home directories. There are roughly 25 users (mostly developers/analysts) and about 40 servers mounting the home directory export. Performance is miserable, with users often seeing multi-second lags for simple commands (like ls, or writing a small text file). Sometimes the home directory mount completely hangs for minutes, with users getting "permission denied" errors. The hardware is a Dell R510 with dual E5620 CPUs and 8 GB RAM. There are eight 15k 2.5” 600 GB drives (Seagate ST3600057SS) configured in hardware RAID-6 with a single hot spare. RAID controller is a Dell PERC H700 w/512MB cache (Linux sees this as a LSI MegaSAS 9260). OS is CentOS 5.6, home directory partition is ext3, with options “rw,data=journal,usrquota”. I have the HW RAID configured to present two virtual disks to the OS: /dev/sda for the OS (boot, root and swap partitions), and /dev/sdb for the home directories. What I find curious, and suspicious, is that the sda device often has very high utilization, even though it only contains the OS. I would expect this virtual drive to be idle almost all the time. The system is not swapping, according to "free" and "vmstat". Why would there be major load on this device? Here is a 30-second snapshot from iostat: Time: 09:37:28 AM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sdb 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 sdb1 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 dm-0 0.00 0.00 0.03 151.82 0.13 607.26 8.00 1.25 8.23 5.16 78.35 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 dm-3 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 Looks like iotop is the ideal tool to use to sniff out these kinds of issues. But I'm on CentOS 5.6, which doesn't have a new enough kernel to support that program. I looked at Determining which process is causing heavy disk I/O?, and besides iotop, one of the suggestions said to do a "echo 1 /proc/sys/vm/block_dump". I did that (after directing kernel messages to tempfs). In about 13 minutes I had about 700k reads or writes, roughly half from kjournald and the other half from nfsd: # egrep " kernel: .*(READ|WRITE)" messages | wc -l 768439 # egrep " kernel: kjournald.*(READ|WRITE)" messages | wc -l 403615 # egrep " kernel: nfsd.*(READ|WRITE)" messages | wc -l 314028 For what it's worth, for the last hour, utilization has constantly been over 90% for the home directory drive. My 30-second iostat keeps showing output like this: Time: 09:36:30 PM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sdb 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 sdb1 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 dm-0 0.00 0.00 0.20 17.76 0.80 71.04 8.00 0.38 21.21 9.22 16.57 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.81 dm-3 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.82

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• How do I PXE boot multiple Windows 7 desktops off the same image?

  - by Matt

  Some years ago in my uni days I recall that the uni labs booted windows nt over the network. There was a shared drive for your own stuff, and other than that any changes you did to the running OS were reset when you restarted the machine. Now I'd like to be able to do the same thing with Windows 7. I have found some howto's for this using iSCSI, but I don't want an iSCSI disk for every single PC, I'm wanting one image for multiple PC's. I've also found PXE Boot setups for installing windows locally, but that's not what I want either. How would I go about setting up what I had at uni but with Windows 7 as a OS to netboot? i.e. How do I netboot windows 7 images? I do not want to netboot a windows 7 installer to a pc to install windows locally, I want to run a windows 7 image from memory/network.

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• Restrict VPN user to Remote Desktop only with Sonicwall

  - by Matt

  Basically I want him to only be able to log onto the VPN in order to use Remote Desktop to use HIS machine. Not surf the internet or do anything like that, but just use the programs on his machine that he doesn't have at home. We use a Sonicwall NSA 220 with their regular VPN client. I can create a user for him, but when I create an access rule it applies to all VPN users. How can I make something like that only apply to ONE user?

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• Connectivity issues with dual NIC machine in EC2

  - by Matt Sieker

  I'm trying to get some servers set up in EC2 in a Virtual Private Cloud. To do this, I have two subnets: 10.0.42.0/24 - Public subnet 10.0.83.0/24 - Private subnet To bridge these two, I have a Funtoo instance with a pair of NICs: eth0 10.0.42.10 eth1 10.0.83.10 Which has the following routing table: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.83.0 * 255.255.255.0 U 0 0 0 eth1 10.0.83.0 * 255.255.255.0 U 203 0 0 eth1 10.0.42.0 * 255.255.255.0 U 202 0 0 eth0 loopback * 255.0.0.0 U 0 0 0 lo default 10.0.42.1 0.0.0.0 UG 0 0 0 eth0 default 10.0.42.1 0.0.0.0 UG 202 0 0 eth0 An elastic IP is attached to the eth0 interface, and I can connect to it fine remotely. However, I cannot ping anything in the 10.0.83.0 subnet. For now iptables is not set up on the box, so there's no rules that would get in the way (Eventually this will be managed by Shorewall, but I should get basic connectivity done first) Subnet details from the VPC interface: CIDR: 10.0.83.0/24 Destination Target 10.0.0.0/16 local 0.0.0.0/0 [ID of eth1 on NAT box] Network ACL: Default Inbound: Rule # Port (Service) Protocol Source Allow/Deny 100 ALL ALL 0.0.0.0/0 ALLOW * ALL ALL 0.0.0.0/0 DENY Outbound: Rule # Port (Service) Protocol Destination Allow/Deny 100 ALL ALL 0.0.0.0/0 ALLOW * ALL ALL 0.0.0.0/0 DENY   CIDR: 10.0.83.0/24 VPC: Destination Target 10.0.0.0/16 local 0.0.0.0/0 [Internet Gateway ID] Network ACL: Default (replace) Inbound: Rule # Port (Service) Protocol Source Allow/Deny 100 ALL ALL 0.0.0.0/0 ALLOW * ALL ALL 0.0.0.0/0 DENY Outbound: Rule # Port (Service) Protocol Destination Allow/Deny 100 ALL ALL 0.0.0.0/0 ALLOW * ALL ALL 0.0.0.0/0 DENY I've been trying to work this out most of the evening, but I'm just stuck. I'm either missing something obvious, or am doing something very wrong. I would think I'd be able to ping from either interface on this box without issue. Hopefully some more pairs of eyes on this configuration will help. EDIT: I am an idiot. After I bothered to install nmap to run some more tests, I discover I can see the ports, and connect to them, pings are just being blocked.

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• Understanding vhosts settings

  - by Matt

  Ok so i have a server and I want to put a few applications on and i am having vhost configuration problems. Here is what i have and I want some direction on what i am doing wrong...ok so the first file is /etc/apache2/ports.conf NameVirtualHost 184.106.111.142:80 Listen 80 <IfModule mod_ssl.c> Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> then i have /etc/apache2/sites-available/somesite.com <VirtualHost 184.106.111.142:80> ServerAdmin [email protected] ServerName somesite.com ServerAlias www.somesite.com DocumentRoot /srv/www/somesite.com/ ErrorLog /srv/www/somesite.com/logs/error.log CustomLog /srv/www/somesite.com/logs/access.log combined <Directory "/srv/www/somesite.com/"> AllowOverride all Options -MultiViews </Directory> </VirtualHost> when i visit somesite.com everything works great but when i add another vhost and lets say thats named anothersite.com. So i have /etc/apache2/sites-available/anothersite.com <VirtualHost 184.106.111.142:80> ServerAdmin [email protected] ServerName anothersite.com ServerAlias www.anothersite.com DocumentRoot /srv/www/anothersite.com/ ErrorLog /srv/www/anothersite.com/logs/error.log CustomLog /srv/www/anothersite.com/logs/access.log combined <Directory "/srv/www/anothersite.com/"> AllowOverride all Options -MultiViews </Directory> </VirtualHost> then i run the following commands >> sudo a2ensite anothersite.com Enabling site anothersite.com. Run '/etc/init.d/apache2 reload' to activate new configuration! >> /etc/init.d/apache2 reload * Reloading web server config apache2 ...done. but when i visit anothersite.com or somesite.com they are both down..What is going on with the vhosts. Could it be the NameVirtualHost declaration with the ip or something...maybe my understanding of vhost settings is not clear. What i dont understand is why do both site now all the sudden not work at all.I would highly appreciate the clarity By the way anothersite.com or somesite.com are the only things I changed to make it more readable

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• How could two processes bind onto the same port?

  - by Matt Ball

  I just ran into an issue where a request made to localhost:8080 from curl was hitting a different server than the same request made from inside Node. lsof -i :8080 revealed that two processes were both binding onto the same port: COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME node 51961 mball 14u IPv4 0xd980e0df7f175e13 0t0 TCP *:http-alt (LISTEN) java 62704 mball 320u IPv6 0xd980e0df7fe08643 0t0 TCP *:http-alt (LISTEN) How is this possible? Were they binding onto different interfaces? Or was it the IPv4 vs 6? If you're curious, node was hitting the other node process, curl was hitting the java process. The java process was started after the node process.

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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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• How do I setup an FTP server on Windows 7?

  - by Matt Frear

  I'm having trouble getting an FTP server setup on Windows 7. I've added the service using Control Panel - Programs - Turn Windows features on and off. I can see the service has started in Control Panel - Services. But then when I fire up a Windows command-line window, cmd, I get Not connected., C:\Users\mattf>ftp localhost ftp> ls Not connected. ftp> open localhost ftp> ls Not connected. ftp> dir Not connected. ftp> quit C:\Users\mattf> And that's as far as I've got. I have no idea why this isn't working - could it be firewall settings?

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• Alternatives to native LDAP

  - by Matt

  We've implemented an LDAP to NIS solution and have begun transitioning some systems to native LDAP binding for authentication and automount maps. Unfortunately we have a very mixed environment with more than 20 *nix environments. The setup for each variant is of course unique and has required various workarounds to get full functionality. We're now at the point where we're willing to revisit the solution and possibly migrate toward something like Likewise (http://www.likewise.org), but would like to know what others are using to solve this problem.

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• email handling with inbox.py and nginx

  - by Matt Ball

  I have a Flask web application running behind gunicorn and Nginx. Nginx proxies any traffic to ivrhub.org to the correct flask app. I would very much like to use inbox.py to process some incoming email. Running inbox.py's example on my server and then sending an email to [email protected] does not work as I intended. The inbox.py server does not seem to receive anything but the email also does not bounce. I'm missing something conceptually -- is there a DNS setting I need to configure or something I need to adjust with Nginx?

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• ActiveSync / Exchange 2007 password expiration buffer on device

  - by Matt Hamende

  I'm trying to determine if there is any buffer of time from the time a password expires in AD to the time that users would stop receiving email on their mobile devices our setup is Exchange 2007 ActiveSync DC's are Server 2008 R2 primarily Android shop, with maybe a few iOS devices I've heard some rumors of people still receiving email after their password expired / changed on the domain, just want to see if anyone else has ever heard of this. Did a bit more reading, read about Token Cache in IIS 7.0 and 15min lagtime, still would like to hear any thoughts about this.

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• Cannot access SMC8014WG-SI provided by TimeWarner/RoadRunner administrative interface...

  - by Matt Rogish

  I just received installation of RoadRunner internet/TV/Voice and I was given a wi-fi router from the TimeWarner folks. The model is a SMC SMC8014WG-SI. Unfortunately, the password it uses is WEP and that is, as we all know, completely insecure. The tech that was here didn't know how to change it to something like WPA2 w/TKIP, and I was on hold for 20 minutes with the TimeWarner folks before I gave up. My problem is that the default web interface (http://192.168.0.1) isn't responding. I can ping it, I can access the internet through it, but I can't get to the admin interface. I did a "hard reset" of the device but still no dice. My suspicion is that the wi-fi admin interface is disabled (a common setting) but the wired interface isn't working on either of my two laptops (I've tried two laptops with two different cables, no link light activated). Am I SOL? Did they lock this down so I can't do what I want to do? Worst-case is I just hook up my go-to WRT54G router to the other modem and leave this one turned off, but I'd rather use their hardware to avoid any "It's not our problem" in the future. Any thoughts? Thanks!!

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• Very poor battery life on Lenovo ThinkPad W500 laptop

  - by Matt

  I have a new ThinkPad W500 laptop (w/ 9 cell battery) running Windows 7 RTM 64-bit. All drivers* and BIOS are the latest. Battery life appeared poor so I performed several tests under the following conditions: Battery starts with 100% charge Screen on minimum brightness Screen saver running Wifi n enabled and active "Normal" set of programs running including Outlook 2007, FeedDemon, TweetDeck and antivirus Laptop left untouched during tests Under the above conditions, I clocked under 2 hours of battery life across 3 tests (1:49, 1:52, 1:47). If I actually use the computer, we're looking at 1:30. Something is not right... The smoking gun here is that Lenovo hasn't officially released Windows 7 drivers for this laptop. I haven't tried with Vista or XP yet. What are others seeing? Update: For W500 owners w/ the 9 cell battery, what value do you see for "Full charge capacity" when on the Battery tab of the Power Manager utility? I see 81.87 Wh.

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• What are the advantages and disadvantages of the various virtual machine image formats?

  - by Matt

  Xen and Virtualbox etc both support a range of different virtual machine image formats. These are: vmdk, vdi, qcow & qcow2, hdd & vhd. Without any bias toward a particular product, I'm wanting to know what are the advantages and disadvantages of the various formats both from a features perspective, robustness and speed? One piece of info I discovered in a forum post was this: "The major difference is that VDI uses relatively large blocks (1MB) when growing an image, and thus has less overhead for block pointers etc. but isn't ultimately space efficient in the sense that if a single byte is non-zero in such a 1MB block the entire space is used. VMDK in contrast uses 64K blocks, and thus has more management overhead and generally a bit less disk space consumption What offsets this is that VDI is more efficient when it comes to snapshots." You might be thinking, I want to know this because I want to know which format to choose? Not exactly, I'm developing some software which utilises these formats and want to support one or more of them. Simplicity, large disks and ease of development are my main drivers.

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• DHCP not responding from laptop or router, but works on directly plugged PC?

  - by Matt H

  I'm at my sister in law's place in Singapore. I'm not from Singapore but am here for a few months. She has some sort of cable modem made by motorolla (SB5101 Surfboard). I think it goes, through starhub or similar provider. Anyhow, her PC is directly attached by cable (not wireless) and she can access the internet. There is no wireless router connected to it. The PC is configured with DHCP and appears to be working. However, the moment I unplug her PC and plug in my laptop, it doesn't get an address. The interesting thing here is that I also see this toredo tunnel adaptor etc. I'm not familiar with what that is. It appears to be being assigned an IP v6 address and an IP v4 address. I thought perhaps it's my laptop, but also when I plug in my DDWRT based router, it also fails to get a DHCP assigned address on the WAN port. I can't also seem to connect into any web configuration on the motorolla modem either. Any ideas? what kind of setup is this? all I'd like to do is plug in my wireless router so I can roam around the house and also access the internet.

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• How to make 7-Zip faster

  - by Matt

  I normally use WinRAR over 7-Zip simply because it's faster and only a little less efficient with compression. I did a few tests on different filetypes and sizes comparing the 7-Zip and WinRAR default settings on their normal compression and their best compression, and in a lot of cases WinRAR was 50% faster and in some it was actually 100% faster. But, I do like FOSS more. So here are my questions: Is there a way to make 7-Zip speed up? I'd like it to at least be on par with WinRAR's speed Is there a way to make recovery segments in 7-Zip like you can in WinRAR? I didn't see any, but I guess it could be a command line thing. I tested WinRAR and 7-Zip using the latest stable version of each (4-dot-something with 7-Zip). Is the 9.x beta release noticeably faster at compression? I'm talking about faster at a comparable setting in WinRAR, not just lowering to bare minimum compression. If it matters, I use a quad core Intel i7 720 (1.6 GHz)/(2.8 GHz) with 4 GB DDR3 RAM, and the 64-bit version of 7-Zip, and dual-boot Debian x64 5.0.4 and Windows 7 Home.

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