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• Mac OS X Mail.app - how to prevent addresses being automatically added to Address Book

  - by Matthew Savage

  Is there any way to disable the feature where Mail.app on OS X 10.6 will automatically add addresses into the address book when replying to an email from someone not in your address book already? I have looked through the settings and tried to find ways around this on Google but nothing has come up, so I thought it best to ask the genius pool. Cheers!

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• qmail throws error "CNAME_­lookup_­failed_­temporarily"

  - by Supratik

  I am using Qmail and when I am sending mails I am sometimes getting the bellow error in my log for a particular domain. Jun 22 05:20:47 221832-web1 qmail: 1308738047.397431 delivery 1040373: deferral: CNAME_lookup_failed_temporarily._(#4.4.3)/ Can anyone please tell me what are the factors responsible for such error ? What are the DNS requests sent by Qmail when sending an email ? FYI: The patch for the DNS cache size issue is already included in Qmail.

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• Problem with diacritics on psql 9.0 (PostgreSQL)

  - by Gaks

  I have two instances of PostgreSQL installed on my server: 8.3 and 9.0. There seams to be some problem with Polish diacritic characters (like óleaszzc) on postgresql 9.0 client - psql. When I connect to DB (either 8.3 or 9.0) with psql 8.3 - I can type all diacritics on the terminal without any problems: www:/tmp# sudo -u postgres /usr/lib/postgresql/8.3/bin/psql -q postgres=# ólscn However, when I connect to the same DBs with psql 9.0 client - I can't type diacritics on the terminal anymore: www:/tmp# sudo -u postgres /usr/lib/postgresql/8.3/bin/psql -q Here are some encoding settings: www:/tmp# sudo -u postgres /usr/lib/postgresql/9.0/bin/psql -q -c "show client_encoding" client_encoding ----------------- UTF8 (1 row) . www:/tmp# sudo -u postgres /usr/lib/postgresql/8.3/bin/psql -q -c "show client_encoding" client_encoding ----------------- UTF8 (1 row) . www:/tmp# sudo -u postgres /usr/lib/postgresql/9.0/bin/psql -q -l List of databases Name | Owner | Encoding | Collation | Ctype | Access privileges ---------------------+--------------+----------+-------------+-------------+----------------------- postgres | postgres | UTF8 | pl_PL.UTF-8 | pl_PL.UTF-8 | . www:/tmp# echo $LANG pl_PL.UTF-8 It looks like DB/cluster configuration doesn't matter - if psql 8.x on terminal works fine and psql 9.x does not. Any idea how to fix that?

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• lxc bandwidth control using tc

  - by kumar

  I am trying to restrict bandwidth inside my containers. I have tried using the following commands , But I think it is not getting effective. cd /sys/fs/cgroup/net_cls/ echo 0x1001 > A/net_cls.classid # 10:1 echo 0x1002 > B/net_cls.classid # 10:2 tc qdisc add dev eth0 root \ handle 10: htb tc class add dev eth0 parent 10: \ classid 10:1 htb rate 40mbit tc class add dev eth0 parent 10: \ classid 10:2 htb rate 30mbit tc filter add dev eth0 parent 10: \ protocol ip prio 10 \ handle 1: cgroup Here A and B are containers created with this command. lxc-execute -n A -f configfile /bin/bash lxc-execute -n B -f configfile /bin/bash Whereas configfile contains only this entry: lxc.utsname = test_lxc AFter starting the container , I have started vsftpd inside container A and try to access the files using the ftp client from another machine. Then I killed vsftpd in container A and started vsftpd in container B and try to access the files using ftp client from another machine. I cannot observe any difference in performance, for that matter it is nowhere nearer to 40mbit/30mbit. Please correct me whether anything wrong here.

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• Migrating outlook user to entourage

  - by Robot

  Can anyone give advice or pointers to resources for migrating a PC Outlook user's email, contacts, etc, to Entourage 2008 on a Mac? Most of what I see is from circa 2005, and I wonder if there is more accurate or effective information.

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• Hardware, network infrastructure for runnng gaming server nd on VirtualGL

  - by archer

  Foud nice project VirtualGL (http://www.virtualgl.org/). Tried to run 3D fames (EVE Online, Prototype) on server and display the output on thin client using 100Mbps network. Server: Gentoo Linux on AMD Phoenom II x6 3.4Gz, 8GB RAM, 2x NVIDIA 9800 GTX in single session with display resulution 1024x768 on client. Performance is very promising. Going to increase network speed to 1Gbps (using either Ethernet or Fiber) and run 5-6 clients simultenously. My questions are: a) what would be better for network - 1Gbps Ethernet or Fiber (clients are distributed in max 20m around server)? Is that a must to use managed switch for better network performance? b) Should I increase number of video cards to put in SLI on server (going to use Gigabyte GA-890FXA-UD7 which has 6 PCIExpress slots [2 x4, 2 x8 and 2 x16]). Will it impact performance significantly. If I need to increase the number of video cards - what would be better - put 2 banks of video cards with 3 in bank using SLI, or 3 banks with 2 in the bank? Would linux recognize that and properly use all banks of video cards? c) any suggestions on good thin clients supporting 1920x1080 HDMI video and 1Gbps network I understand that my questions can't be answered clearly (unless someone already managed to use this kind of stuff ;)) although any suggestions would be very helpful.

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• How to configure VirtualBox server for performance at home

  - by BluJai

  I currently have two physical Ubuntu Server 10.10 servers at home: one serves as our firewall/router/DHCP/VPN server and the other performs double-duty as a file server and a VirtualBox host for an Ubuntu Desktop 10.10 machine which I use from remote connections (via NoMachine) for many thin-client purposes which are irrelevant to my question. What I'd like to accomplish is to consolidate the two physical machines into one which is a dedicated VirtualBox host (most likely running Ubuntu Server 10.10). Note that I'd like to stick with VirtualBox (if possible) because I'm most comfortable with it and use it on a daily basis at both home and work. Specifically, I plan to have one VM set up as file server, another as the firewall/router/DHCP/VPN (or possibly split those a bit) and a third, which is the only current VM (already VirtualBox), which is the thin-client host. My question comes down to performance and/or recommendations about the file server VM. The file server hosts about 6 terabytes of data across 4 drives. What I'd like to do is use raw disk access from the VM directly to the existing disks. However, I'm curious what performance advantage/disadvantage that would have as compared to using shared folders from the VM host and basically just have the whole drive served as a shared folder to the VM which would then serve it to the other machines on the network. I don't know if virtual disks would even work in this scenario and I certainly wouldn't want a drive to be filled with just a single file which is 1.5 TB (disk image). To add understanding of context, but not to get additional advice, I want to virtualize these machines because I intend to regularly use the snapshot capabilities of VirtualBox for the system disks (which will be virtual drives) of the VMs and I have some physical space/power needs to address (as I mentioned, this is at home).

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• Server 2008 NAT Internet Not Working

  - by Jack

  I'm trying to set up Routing and Remote Access on Windows Server 2008 R2, I have a network connection that I want to share the internet from to another private network. The server has two NICs which are configured as follows: External NIC (Dynamically assigned by ISP) IP:10.175.4.150 Subnet:255.255.192.0 Gateway:10.175.0.1 DNS:10.175.0.1 Internal NIC IP:172.16.254.1 Subnet:255.255.255.0 Gateway:None DNS:None I have set the external NIC to be the public interface and enabled NAT on it in the RRAS MMC and set the internal NIC to be a private interface. I have also set up the DNS forwarding or whatever it is in the NAT section. From a client (IP:172.16.254.2) I can ping the server and access files on it, when I try to browse the web with the default gateway set to the internal NIC ip I end up getting a 404 page which is returned from the ISPs default gateway. I'm guessing it's something to do with the double NAT possibly. Trying to ping the ISPs default gateway from a private network client just times out as does accessing it directly. I've disabled and reconfigured RRAS multiple times and that doesn't seem to have made a difference, so can anyone tell me what I'm doing wrong? Thanks.

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• Apps management dashboard: what features should be in it?

  - by Christophe

  On a dashboard to manage business web apps (CRM, email marketing, collaboration, accounting...) from a single place which features should be a must have and nice to have? Those that come to mind are SSO, unified billing, users provisioning. What else? What should be available to the super user (admin) vs the business user? Do you know any products of this kind in the market today? Thanks Christophe GetApp.com

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• Mac OSX and root login enabled

  - by reza

  All I am running OSX 10.6.8 I have enabled root login through Directory Utility. I have assigned a password. I get an error when I try to ssh root@localhost. ssh -v root@localhost OpenSSH_5.2p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /Users/rrazavipour-lp/.ssh/config debug1: Reading configuration data /etc/ssh_config debug1: Connecting to localhost [127.0.0.1] port 22. debug1: Connection established. debug1: identity file /Users/rrazavipour-lp/.ssh/identity type -1 debug1: identity file /Users/rrazavipour-lp/.ssh/id_rsa type 1 debug1: identity file /Users/rrazavipour-lp/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.2 debug1: match: OpenSSH_5.2 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'localhost' is known and matches the RSA host key. debug1: Found key in /Users/rrazavipour-lp/.ssh/known_hosts:47 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /Users/rrazavipour-lp/.ssh/id_dsa debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Trying private key: /Users/rrazavipour-lp/.ssh/identity debug1: Offering public key: /Users/rrazavipour-lp/.ssh/id_rsa debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Next authentication method: keyboard-interactive Password: debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Authentications that can continue: publickey,keyboard-interactive debug1: Authentications that can continue: publickey,keyboard-interactive debug1: No more authentication methods to try. Permission denied (publickey,keyboard-interactive). What I am doing wrong? I know I have the password correct.

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• High latency issue for web service call from amazon aws ec2 to local server

  - by SibzTer

  We have a legacy web application that is running in our data center on premises located in Houston. We have a developed a new .net 4 based web application in order to provide new features to customers. The new web application is hosted in amazon aws ec2 environment (N. Virginia region us-east-1b zone). In order to get seamlessly integrate with the legacy application the new web application makes web service calls to retrieve data. We are seeing an unusually high latency time in the order of 5+ seconds for these web service calls. The exact same web service call returns in less than a second on our local PCs (which makes sense given physical proximity to the actual server). The weird part is that we have developers in California who also have the same milliseconds response time. We are testing the web service response using third party tools such as SoapUI, Google Chrome extensions such as Advanced REST Client, Postman REST Client, etc. As if this wasnt weird enough, we have noticed the same low latency from certain other ec2 instances while testing which are in the same region and availability zone as well. If we experienced the high latency consistently from all the ec2 instances I could understand. But there is something else going on. Comparing the various stats and results between the low latency and high latency ec2 servers do not show any significant differences: ping (constant 40ms), tracert, winmtr, etc. We have instances that are in the VPC as well. So I tried both the public and private IP address of the web service host server and that didnt make a difference either for the above results. We need to resolve this latency issue as this is causing the resulting web pages to load very slowly (almost 15+ seconds which is simply unacceptable). The ec2 instances have Windows Server Datacenter 64 bit. Let me know if there is any other infor I can provide to help diagnose this.

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• Save data typed into PDF Form

  - by Manzoor Ahmed

  Hey I have PDF Form which would not let me save the data typed into it. Here is the form: http://www.cic.gc.ca/english/pdf/kits/forms/imm0008egen.pdf I want it to save the data typed into it so that I can email it to my relative. Any ideas? I'm using Acrobat Reader.

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• What is the simplest way to send a large batch of pictures to a distant friend or colleague?

  - by Notitze

  What is the simplest way to send a large batch of pictures to a friend, colleague or to a group? I know about social sites like Picasa or Facebook but not everyone in my group has an account, nor I want to make any of the pictures public. Uploading repeated batches won't do for this and definitely sending through email won't cut it. Also Ftp solutions are just too technical. Is there just a simple tool for this?

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• How to configure VirtualBox server for performance at home

  - by BluJai

  I currently have two physical Ubuntu Server 10.10 servers at home: one serves as our firewall/router/DHCP/VPN server and the other performs double-duty as a file server and a VirtualBox host for an Ubuntu Desktop 10.10 machine which I use from remote connections (via NoMachine) for many thin-client purposes which are irrelevant to my question. What I'd like to accomplish is to consolidate the two physical machines into one which is a dedicated VirtualBox host (most likely running Ubuntu Server 10.10). Note that I'd like to stick with VirtualBox (if possible) because I'm most comfortable with it and use it on a daily basis at both home and work. Specifically, I plan to have one VM set up as file server, another as the firewall/router/DHCP/VPN (or possibly split those a bit) and a third, which is the only current VM (already VirtualBox), which is the thin-client host. My question comes down to performance and/or recommendations about the file server VM. The file server hosts about 6 terabytes of data across 4 drives. What I'd like to do is use raw disk access from the VM directly to the existing disks. However, I'm curious what performance advantage/disadvantage that would have as compared to using shared folders from the VM host and basically just have the whole drive served as a shared folder to the VM which would then serve it to the other machines on the network. I don't know if virtual disks would even work in this scenario and I certainly wouldn't want a drive to be filled with just a single file which is 1.5 TB (disk image). To add understanding of context, but not to get additional advice, I want to virtualize these machines because I intend to regularly use the snapshot capabilities of VirtualBox for the system disks (which will be virtual drives) of the VMs and I have some physical space/power needs to address (as I mentioned, this is at home).

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• Possible to do cable & wireless syncing with Blackberry Enterprise Server?

  - by norova

  Using Blackberry Enterprise Server, is there a way to sync both wirelessly and via the sync cable? As in, can you make contacts sync via the cable and then the calendar and email sync wirelessly? Additionally, if you can sync contacts locally with the usb cable, can you sync both your regular outlook contact list and a Public Contact list without using a 3rd party application?

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• tcp connect hangs on SYN_SENT if something listens, gets CONN_REFUSED if nothing listens

  - by Amos Shapira

  I'm hitting a very strange problem - when I try to connect to one of our servers the client hangs with SYN_SENT if something listens on the port (e.g. Apache on port 80, sshd on port 22 or SMTP on port 25) but if I try to connect to a port on which nothing listens then I immediately get a "CONNECTION refused" error. Connecting to other applications (e.g. rsyncd on some arbitrary port) succeeds. I ran tcpdump on the server and see that the SYN packets arrive to it but it only sends a response if nothing listens on that port. e.g.: on the server I run: # tcpdump -nn port 81 06:49:34.641080 IP 10.x.y.z.49829 server.81: S 3966400723:3966400723(0) win 12320 06:49:34.641118 IP server.81 x.y.z.49829: R 0:0(0) ack 3966400724 win 0 But if I listen on this port, e.g. with nc -4lvvv 81 & Then the output of tcpdump is: 06:44:31.063614 IP x.y.z.45954 server.81: S 3493682313:3493682313(0) win 12320 (and repeats until I stop it) The server is CentOS 5, the client is Ubuntu 11.04, the connection is done between two LAN's over per-user TCP OpenVPN. Connection to other servers on that network do not have a problem. Connecting from the other servers on the same network to that server works fine. Connections from other clients in our office over openvpn is also not a problem. What am I missing? Thanks.

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• Problem setting up HP PhotoSmart C4783

  - by ProfKaos

  I am trying to get several PC's on a network to connect to my client's new wireless printer, the C4783. I initially installed the whole HP 'tsumami of software' the comes with the printer onto my laptop, connected to the printer over USB, and corrected it's networking config. My laptop now also can connect to and print on the printer over the wireless network, as is intended for all PC's. However, when I try and install the HP software on my client's netbook, the HP software cannot find the printer. Firewall was turned off during this time, so doesn't play a role. I tried re-installing all software, but I initially only got a "Repair" or "Uninstall". Choosing Uninstall triggers a lengthy process that ends with a sudden and forceful restart, after which the same "Repair" or "Uninstall" choices are present. Looks like uninstall doesn't. Any suggestions as to how I can begin diagnosing why my laptop has no problem connecting to the printer, but two others do? Wireless is unsecured, and no, nobody has to know where I am right now. :-)

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• apache with php fastcgi keeps going down

  - by Josh Nankin

  I have an apache2 server configured with MPM worker and php fast cgi. Lately the apache logs have been telling me that MaxClients is being reached frequently, even though it's already pretty high. My server is now constantly going down, and I see a bunch of lines like this in the log: [Sun Mar 06 04:25:40 2011] [error] [client 50.16.83.115] FastCGI: comm with (dynamic) server "/var/local/fcgi/php-cgi-wrapper.fcgi" aborted: (first read) idle timeout (20 sec) [Sun Mar 06 04:25:40 2011] [error] [client 50.16.83.115] FastCGI: incomplete headers (0 bytes) received from server "/var/local/fcgi/php-cgi-wrapper.fcgi" I can see that my php-cgi processes are pretty large (about 70mb on average). Here's my apache configuration for MPM worker: KeepAlive ON KeepAliveTimeout 2 <IfModule mpm_worker_module> StartServers 5 MinSpareThreads 10 MaxSpareThreads 10 ThreadLimit 64 ThreadsPerChild 10 MaxClients 20 MaxRequestsPerChild 2000 </IfModule> Heres my fastcgi apache configuration: <IfModule mod_fastcgi.c> # One shared PHP-managed fastcgi for all sites Alias /fcgi /var/local/fcgi # IMPORTANT: without this we get more than one instance # of our wrapper, which itself spawns 20 PHP processes, so # that would be Bad (tm) FastCgiConfig -idle-timeout 20 -maxClassProcesses 1 <Directory /var/local/fcgi> # Use the + so we don't clobber other options that # may be needed. You might want FollowSymLinks here Options +ExecCGI </Directory> AddType application/x-httpd-php5 .php AddHandler fastcgi-script .fcgi Action application/x-httpd-php5 /fcgi/php-cgi-wrapper.fcgi </IfModule> Here's my fastcgi wrapper: #!/bin/sh PHPRC="/etc/php5/apache2" export PHPRC PHP_FCGI_CHILDREN=8 export PHP_FCGI_CHILDREN exec /usr/bin/php-cgi Any help would be very very much appreciated!

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• Web based file search in the lan?

  - by Magnetic_dud

  I would like to search files in my lan easily. (over 500k files on SMB shares, it would take ages with other ways) I mean, i just need to do a quick search on file names, i don't care content indexing at all, as most of my files are in a proprietary format, and the file name is explicative enough. But, date range filters are a must for me. I just need a quick search like voidtools' everything can do, but in a network way The files are on a WHS box (lol, Videos and Music share names are not appropriate for a company, but a license for that win2003-based os is cheaper than an xp home one!) I tried: Lansearch pro: it is not good for me, as i need a quick index Network Search Engine: it would be perfect, but does not offer a date range filter Microsoft Search Server 2008 Express, but it is horrible! First, does NOT index filenames, and then, my Core2Duo is not powerful enough to run it smoothly. Google Desktop with a proxy on localhost to make it run on the lan, but i don't like the hacked result. The preinstalled Windows Search 4.0 but it sucks totally in choosing the relevance of data - uninstalled Docco... what's that? I am considering to try: Ibm omnifind DocFetcher (can it work as a client? did not investigated yet) Strigi (it looks like that it can work as a client, right?) Any ideas/suggestions?

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• How to set up a VPN Incoming connection with Windows to tunnel Internet traffic?

  - by Mehrdad

  I want to set up a VPN on a remote server to route all my Internet traffic for privacy reasons. I can set up an incoming connection and connect to it successfully. The problem is, I can just see the remote computer and no other Web sites will open. I want the remote server to act like a NAT. How can I do that? Note that I don't want to split Internet traffic. I actually want to send all the traffic to the remote server but need to make it relay the traffic. For the record, my remote server is Windows Web Server 2008 which does not have routing and remote access service. Clarification I'm mostly interested in server configuration. I don't have any problems configuring the client. By the way, Windows Web Server 2008 seems to have the same VPN features built in client OSes (like Vista) and specifically, it doesn't include the RRAS console in MMC. I'm also open to suggestions regarding third party PPTP/L2TP daemons available, if they are free.

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• Windows XP laptop doesn't appear in WSUS All computers list

  - by George

  I have this one laptop that doesn't appear in WSUS all computers list. We have about 23-25 PCs/laptops/servers in the network, all, but one are listed in WSUS. This is what I have done so far: 1) Changing Updates on local PC: Go to your Windows XP client and start a new Microsoft Management Console (MMC). At Start, Run, type MMC. Use Ctrl+M to add a new snap-in. Click Add, and then add the Group Policy Object Editor for the Local Computer. Click Close, and then click OK. Expand the Local Computer Policy. Under Computer Configuration, go to Administrative Templates, Windows Components, Windows Update. In the right-hand pane, double-click Specify intranet Microsoft update service location. Configure the settings to reflect my WSUS server. Click OK and then close the MMC without saving it. executed wuauclt.exe /detectnow 2) Edited registry key to be pushed to the PCs using GPO [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate] "WUServer"=http://wsusserver "TargetGroupEnabled"=dword:00000001 "TargetGroup"="WINXP" "WUStatusServer"=http://wsuswerver 3) executed wuauclt /resetauthorization /detectnow 4)Synchronised and refreshed the group I am running out of ideas here. The client is running Windows XP pro, WSUS version is 3.0 and is running on Windows 2008 R2 64-bit. Please, help! Thanks! EDIT 13.IX.2012 @ 15.40 I should have also mentioned that we do have a Windows Update GPO for workstations group and that laptop is a part of that group.

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• Problem with PXE boot

  - by user70523

  I followed the following link for PXE boot, http://www.howtoforge.com/setting-up-a-pxe-install-server-on-ubuntu-9.10-p3 and I was able to ping the client from the server and also when I booted up the client It is getting the IP address from the server. But later,I got this error PXELinux 3.82 2009-06-09 . . . [other informations] !PXE Entry point found (we hope) at 9D3B:0109 via plan A UNDI code segment at 9D3B len 16C2 UNDI data segment at 933B len A000 Getting cached packet 01 02 03 . . . [other informations] TFTP prefix: Trying to load: pxelinux.cfg/ec5db4c0-74fe-d511-b9e7-3d9235afe5a1 Trying to load: pxelinux.cfg/01-00-17-31-b6-5e-a8 Trying to load: pxelinux.cfg/0A64491E Trying to load: pxelinux.cfg/0A64491 Trying to load: pxelinux.cfg/0A6449 Trying to load: pxelinux.cfg/0A644 Trying to load: pxelinux.cfg/0A64 Trying to load: pxelinux.cfg/0A6 Trying to load: pxelinux.cfg/0A Trying to load: pxelinux.cfg/0 Trying to load: pxelinux.cfg/default Unable to locate configuration file Boot failed: press a key to retry or wait for reset I have put all the files mentioned in the link in tftpboot. Can anyone explain what could be the problem. Thanks in advance

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• How to get gigabit network speeds on Windows XP?

  - by JB

  We've just installed gigabit switches at work, and things on the Linux side are going well. Our linux boxes, which use a Intel Corporation 82566DM-2 Gigabit nic (according to lspci), consistently get over 900 mbits/sec: iperf -c ipserver ------------------------------------------------------------ Client connecting to ipserver, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.40.9 port 39823 connected with 192.168.1.115 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.08 GBytes 929 Mbits/sec We have a bunch of Windows XP 64-bit machines that use Broadcom NetXtreme 57xx cards. I spent around a day trying to get equivalent speeds on them, but couldn't get above 200 Mbits/sec. I noticed the Windows iperf tests said that the TCP window size was 8 Kb by default (as opposed to 16 Kb on Linux, so I modified my test to reflect that. Still no love. I went to Broadcom's site, downloaded the latest drivers for the card and installed. Still no love. However, finally, I tried a 64 Kb window size with the new drivers, and finally an improvement! $ iperf -c ipserver -w64k ------------------------------------------------------------ Client connecting to ipserver, TCP port 5001 TCP window size: 64.0 KByte ------------------------------------------------------------ [ 3] local 192.168.40.214 port 1848 connected with 192.168.1.115 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 933 MBytes 782 Mbits/sec Much better, but still not really taking advantage of the full capabilities of the network. If the Linux box can reach 950 Mbits/sec consistently, this box should be able to as well. Also, if you're wondering about the medium, this is over the same cable...I'm switching back and forth. Any suggestion or ideas would be really welcome. Thanks!

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• Resolving CloudFlare DNS related mail delivery problems

  - by Andy Castles

  I recently started using CloudFlare and am having a few teething problems. Our domain is netlanguages.com and while we have a lot of sub-domains listen, we are currently only trialling a few of the servers through the CloudFlare CDN (for example, www.netlanguages.com is enabled for CDN, netlanguages.com is not). The actual CDN service seems to be reliable, but the problem that we are having is with DNS, and specifically with mail delivery. The background is that we have contact forms on our web site which use PHP mail() to send the details to end-users' email addresses, with the "from" address of the messages being [email protected] which is a valid address on our mail server. Most of the mails are arriving correctly, but a few specific people are not receiving them. The webserver uses qmail to deliver the messages, and the qmail log files show us some of the errors that the receiving mail servers return when they reject the mail delivery attempt. Two examples: Connected to 94.100.176.20 but sender was rejected./Remote host said: 421 DNS problem (interdominios.netlanguages.com). Try again later Connected to 213.186.33.29 but sender was rejected./Remote host said: 451 DNS temporary failure (#4.3.0) From what I can tell, the receiving SMTP server is doing a DNS lookup of some description on either the host of the "from" email address (netlanguages.com) or the server name given in the EHLO command of the SMTP conversation (in the first example above, interdominios.netlanguages.com), both of which should resolve to non-CloudFlare IP addresses. I've read that the CloudFlare DNS service is very reliable and fast but both of the problems above seem to point to a problem with remote servers unable to do DNS lookups. I should also point out that we changed our DNS to CloudFlare on 6th Feb, and since then started experiencing these mail delivery problems. On 22nd Feb we moved our DNS away from CloudFlare to see if the issues were related to CloudFlare and after a few hours delivery began to work. Then on 26th Feb I moved the DNS back to CloudFlare again and delivery problems started again. The issues definitely seems to be related to DNS, but I don't know if it's a configuration issue, or something else. Finally, I should say that our two DNS MX records point to non-CDN A record IP addresses, interdominios.netlanguages.com (the web and qmail server) also points to a non-CDN A record IP address. Does anyone know what the problem could be here? Any light you can shed on this will be most appreciated. Many thanks, Andy

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• Social network for internal company use

  - by khelll

  I'm seeking a social network app for employees in the company that can do the following: allows people to communicate within a company or across everyone on the social network (they can have access to a group or to everyone) post and archive interesting links, documents, etc. start a thread that goes to a group or to everyone lookup people’s info (profile) integrate w email so I can know if someone posts something new or responds to a questions Open source + customized deployment is a plus.

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