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• How to have SSL on Amazon Elastic Load Balancer with a Gunicorn EC2 server?

  - by Riegie Godwin

  I'm a self taught back end engineer so I'm learning all of this stuff as I go along. For the longest time, I've been using basic authentication for my users. Many developers are advising against this approach since each request will contain the username & password in clear text. Anyone with the right skills can sniff on the connection between my iOS application and my Django/Gunicorn Server and obtain their password. I wouldn't want to put my user's credentials at risk so I would like to implement a more secure way of authentication. SSL seems to be the most viable option. My server doesn't serve any static content or anything crazy of that sort. All the server does is send and receive "json" responses from and to my iOS application. Here is my current topology. iOS application ------ Amazon Elastic Load Balancer ------- EC2 Instances running HTTP Gunicorn. Gunicorn runs on port 8000. I have a CNAME record from GoDaddy for the Amazon Elastic Load Balancer DNS. So instead of using the long DNS to make requests, I just use server.example.com. To interact with my servers I send and receive requests to server.example.com:8000/ This setup works and has been solid. However I need to have a more secure way. I would like to setup SSL between my iOS application and my Elastic Load Balancer. How can I go about doing this? Since I am only sending json responses to my application, do I really need to buy a certificate from a CA or can I create my own? (since browsers will not be interacting with my servers. My servers are only designed to send json responses to my iOS application).

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• How can I tell GoogleBot that a subdirectory is now a subdomain? [migrated]

  - by cwd

  I had about a million pages of a catalog indexed under a subdirectory, and now that's moved to a subdomain. GoogleBot is crawling each one of them and getting a 301 redirect to the new location. Even though I have set up the redirect rule in the apache sites-enabled configuration file, (i.e. it's early on when apache does the redirect - PHP is not even getting loaded), even though I have done that, the server isn't handling the load well. GoogleBot is making around 5 requests per second, and on top of my normal traffic that is hiking up the CPU for a few hours at a time. I checked in Webmaster Tools and the corresponding documentation for a way to let Google know that the content had been moved from a subdirectory to a subdomain, but with little luck. Basically the most helpful thing I saw said to just send 301 headers for the new location. How can I tell GoogleBot that a subdirectory is now a subdomain? If that is not an option, how can I more efficiently send 301 redirects out for a particular subdomain? I was thinking perhaps the Nginx server but I'm not sure that I can run both Apache and Nginx side by side on port 80 for different subdomains.

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• Liferay - Verify each node in a cluster

  - by Schrute

  In this example, I have two clustered instances of Liferay using bundled Tomcat running, using cluster link and shared documents. Let's say the name of the public community is fubar and friendy URL used is fubar.lipsum.com. Let's say the ports listening on each server is 8080. If I go to both server1:8080 or server2:8080 I will get the default page for Liferay. How can I test fubar.lipsum.com on each node by using the backend server, so I can verify each server? If I test it, it just goes to the load balancer, I wish there was a way to append to the backend connection to bring it up. I can add the friendly URL to my local machines hosts file and this seems to kinda work, but then once something is called in the application, it tries to go out again from the backend server and then uses SSL and then we have problems. I think I may be able to do port forwarding, but this seems like a basic thing we should be able to do and what I've found so far in the admin docs has not helped. Using the option to print the server name in the page details isn't an option either.

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• Difference in performance: local machine VS amazon medium instance

  - by user644745

  I see a drastic difference in performance matrix when i run it with apache benchmark (ab) in my local machine VS production hosted in amazon medium instance. Same concurrent requests (5) and same total number of requests (111) has been run against both. Amazon has better memory than my local machine. But there are 2 CPUs in my local machine vs 1 CPU in m1.medium. My internet speed is very low at the moment, I am getting Transfer rate as 25.29KBps. How can I improve the performance ? Do not know how to interpret Connect, Processing, Waiting and total in ab output. Here is Localhost: Server Hostname: localhost Server Port: 9999 Document Path: / Document Length: 7631 bytes Concurrency Level: 5 Time taken for tests: 1.424 seconds Complete requests: 111 Failed requests: 102 (Connect: 0, Receive: 0, Length: 102, Exceptions: 0) Write errors: 0 Total transferred: 860808 bytes HTML transferred: 847155 bytes Requests per second: 77.95 [#/sec] (mean) Time per request: 64.148 [ms] (mean) Time per request: 12.830 [ms] (mean, across all concurrent requests) Transfer rate: 590.30 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.5 0 1 Processing: 14 63 99.9 43 562 Waiting: 14 60 96.7 39 560 Total: 14 63 99.9 43 563 And this is production: Document Path: / Document Length: 7783 bytes Concurrency Level: 5 Time taken for tests: 33.883 seconds Complete requests: 111 Failed requests: 0 Write errors: 0 Total transferred: 877566 bytes HTML transferred: 863913 bytes Requests per second: 3.28 [#/sec] (mean) Time per request: 1526.258 [ms] (mean) Time per request: 305.252 [ms] (mean, across all concurrent requests) Transfer rate: 25.29 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 290 297 14.0 293 413 Processing: 897 1178 63.4 1176 1391 Waiting: 296 606 135.6 588 1171 Total: 1191 1475 66.0 1471 1684

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• Centos 6.2 Fresh 'Basic Server' install networking issues

  - by RWC

  I've had a /29 provisioned on a network port for a server and am trying to at least configure the machine so I can ssh into it. It's Centos 6.2 x64 with the Basic Server install. Currently not able to ping gateway or any address for that matter. For reference: Default Interface: em2 Network ID: 66.*.*.0/29 Gateway: 66.*.*.1 Broadcast: 66.*.*.7 Please see my following configs: /etc/sysconfig/network-scripts/ifcfg-em2 DEVICE=em2 NM_CONTROLLED=yes ONBOOT=yes HWADDR=Not Important TYPE=Ethernet BOOTPROTO=none IPADDR=66.*.*.2 PREFIX=29 DNS1=8.8.8.8 DNS2=8.8.4.4 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="System em2" NETMASK=255.255.255.248 USERCTL=no $: route -n Destination // Gateway // Genmask // Flags // Metric // Ref // Use // Iface 66.*.*.0 0.0.0.0 255.255.255.248 U 0 0 0 em2 169.254.0.0 0.0.0.0 255.255.0.0 U 0 1003 0 em2 0.0.0.0 66.*.*.1 0.0.0.0 UG 0 0 0 em2 $: route Destination // Gateway // Genmask // Flags // Metric // Ref // Use // Iface 66.*.*.0 * 255.255.255.248 U 0 0 0 em2 link-local * 255.255.0.0 U 0 1003 0 em2 default 66.*.*.1 0.0.0.0 UG 0 0 0 em2 $: cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=excalibur.domain.com GATEWAY=66.*.*.1 Keep in mind that I cannot even currently ping the gateway which is quite confusing for me. My /etc/hosts are configured correctly with the *.2 address. I'm not concerned with getting all of the addresses on the /29 up and running yet, just one so I can at least ssh in. Thanks! Edit: Adding in ifconfig. $: ifconfig em2 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:66.*.*.2 Bcat:66.*.*.7 Mask:255.255.255.248 inet6 addr: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5536 errors:0 dropped:0 overruns:0 frame:0 TX packets:10 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2599469 (2.4 MiB) TX bytes: 748 (748.0 b) Interrupt:48 Memory:dc000000-dc012800 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:34 errors:0 etc etc

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• Forward Apache to Django dev server

  - by Alex Jillard

  I'm trying to get apache to forward all requests on port 80 to 127.0.0.1:8000, which is where the django dev server runs. I think I have it forwarding properly, but there must be an issue with 127.0.0.1:8000 not being run by apache? I'm running the django dev server in an ubuntu vmware instance, and I'd other people in the office to see the apps in development without having to promote anything to our actual dev/staging servers. Right now the virtual machine picks up an IP for itself, and when I point a browser to that url with the defualt apache config, I get the default apache page. I've since changed the httpd.conf file to the following to try and get it to forward the requests to the django dev server: ServerName localhost <Proxy *> Order deny,allow Allow from all </Proxy> <VirtualHost *> ServerName localhost ServerAdmin [email protected] ProxyRequests off ProxyPass * http://127.0.0.1:8000 </VirtualHost> All I get are 404s with this, and in error.log I get the following (192.168.1.101 is the IP of my computer 192.168.1.142 is the IP of the virtual machine): [Mon Mar 08 08:42:30 2010] [error] [client 192.168.1.101] File does not exist: /htdocs

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• Problem posting multipart form data using Apache with mod_proxy to a mongrel instance

  - by Ryan E

  I am attempting to simulate my site's production environment as closely as I can on my local machine. This is a rails site that uses Apache w/ mod_proxy to forward requests to a mongrel cluster. On my Mac OSX Leopard machine, I have the default install of apache running and have configured a vhost to use mod_proxy to to forward requests to a local running mongrel instance on port 3000. <Proxy balancer://mongrel_cluster-development> BalancerMember http://127.0.0.1:3000 </Proxy> For the most part, this is working fine. I can browse my development site using the ServerName of the vhost I configured and can confirm that requests are being properly forwarded to the mongrel instance. However, there is a page on the site that has a multipart form that is used to upload an image to the server. When I post this form, there is a delay of about 5 minutes and the browser ultimately returns a Bad Request Your browser sent a request that this server could not understand. In the error log for my vhost: [Tue Sep 22 09:47:57 2009] [error] (70007)The timeout specified has expired: proxy: prefetch request body failed to 127.0.0.1:3000 (127.0.0.1) from ::1 () This same form works fine if I browse directly to the mongrel instance (http://127.0.0.1:3000). Anybody have any idea what the problem might be and how to fix it? If there is any important information that I neglected to include, post a comment, and I can add to this question. Note: Upon further investigation, this appears to be a problem specific to Safari. The form works fine in Firefox.

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• Cannot ping Google Public DNS on 8.8.8.8

  - by Tibor

  I have a weird problem on my Windows 7 (x64) computer. I seem to cannot ping the Google Public DNS on one of its addresses (while the other works fine). The peculiar thing is that it fails with the General failure. error message which usually means that there is a problem with a network adapter/base connectivity and not a timeout as one would expect. I checked my routing tables for any anomalies and I even flushed them but the problem seems unrelated. All the other hosts I tried ping fine (either respond or timeout). If I try to tracert or connect to the address via browser (yes, I know that it doesn't listen on port 80), it also fails instantaneously. The reason I need to ping 8.8.8.8 is that I commonly use it as a test of Internet conectivity due to it being rememberable. The problem occurs no matter where I connect to the Internet (it is a laptop computer). What could be the cause of this anomaly? Note: I use native IPv6 connectivity.

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• Binding to LDAPS using PHP failing

  - by Sean

  We've finally set-up our server to accept ldap SSL connections thanks to another question answered by a helpful member. Our problem now is that when attempting to bind to ldap using the below simple PHP script, we constantly fail. Binding using ldap instead of ldaps works just fine using the script so I know the ldap is enabled. The catcher is that while using LDP.exe, we can successfully connect and bind to ldap on port 636 using a secure connection. The script we are failing with is below: <?php $ldap = ldap_connect("ldaps://localhost"); $username="user"; $password="pass"; if($bind = ldap_bind($ldap, $username,$password )) echo "logged in"; else echo "fail"; echo "<br/>done"; ?> We've also attempted inputting the username as "user@domain" or "domain/user" with no success. It seems I'm forever having LDAP/Cert questions. Our environment is Server 2008.

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• How to restrict postfix send limited email with policyd v2?

  - by Shalini Tripathi

  I have installed cluebringer-2.0.7 for postfix and enabled below lines in the main.cf file of postfix. But I could not see any policy working smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination check_policy_service inet:127.0.0.1:10031 smtpd_end_of_data_restrictions=check_policy_service inet:127.0.0.1:10031 To check further I enabled logging in policyd and its only shows below logs and there is no logs getting populated when I send new emails.. [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: Process Backgrounded [2012/06/12-21:18:50 - 13949] [CBPOLICYD] NOTICE: Policyd v2 / Cluebringer - v2.0.7 [2012/06/12-21:18:50 - 13949] [CBPOLICYD] NOTICE: Initializing system modules. [2012/06/12-21:18:50 - 13949] [CBPOLICYD] NOTICE: System modules initialized. [2012/06/12-21:18:50 - 13949] [CBPOLICYD] NOTICE: Module load started... [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = AccessControl: enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = CheckHelo: enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = CheckSPF: enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = Greylisting: enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = Quotas: enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = Protocol(Postfix): enabled [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: = Protocol(Bizanga): enabled [2012/06/12-21:18:50 - 13949] [CBPOLICYD] NOTICE: Module load done. [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: 2012/06/12-21:18:50 cbp (type Net::Server::PreFork) starting! pid(13949) [2012/06/12-21:18:50 - 13949] [CORE] NOTICE: Binding to TCP port 10031 on host * [2012/06/12-21:18:50 - 13949] [CORE] WARNING: Group Not Defined. Defaulting to EGID '0 10 6 4 3 2 1 0' [2012/06/12-21:18:50 - 13949] [CORE] WARNING: User Not Defined. Defaulting to EUID '0' Do I need to do anymore settings for postfix to listen on policyd???Please help

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• 2nd instance of mysql closes/doesnt start no warnings/errors?

  - by acidzombie24

  I have an external HD and i'd like to run a 2nd mysql instance on it. I used the windows installer to install/configure mysqld as a service on windows7. I took the my.ini from C:\Program Files\MySQL\MySQL Server 5.5\my.ini Then edited the port (client and mysqld), datadir and innodb_data_home_dir. After running this command "C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqld" --defaults-file="f:/dev/my.ini" I found an error which was all about the innodb_data_home_dir directory not existing. After that I ran the command again. Mysqld simply starts up for a second then immediately closes. I see no message in my command prompt. I know this command line args are correct as i see the mysqld service using the same one except a different my.ini path. Also it did tell me about the directory not existing so i know it is reading the new ini file. How do i figure out why this 2nd instance of mysqld is closing? How do i get 2 instance running? I'm using v 5.5

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• Intel D2500HN Atom D2500 Doesn't turn on

  - by David W

  I recently bought parts from Amazon to build an embedded PC, and have assembled everything. I have: Intel D2500HN Mini-ITX Motherboard Mini-Box Pico-PSU 80 M350 Universal Min-ITX Enclosure 2GB DDR3 Memory Kinamax AD-LCD12 LCD Monitors 12V 6A 72W AC Adapter Power Supply The motherboard gets a light (on the motherboard, not on the Pico-PSU) when I plug it into the power adapter. Furthermore, I see the power switch light come on when I press the power button. However, the display doesn't turn on, and it doesn't seem that the PC is actually turned on. Since I'm seeing these lights, I know that the motherboard is getting power. Furthermore, the display VGA port is embedded into the motherboard, so that's not the issue. I'm just trying to figure out what COULD be the issue aside from a faulty motherboard. I have a diagram of the D2500HN motherboard which labels everything, and have ensured that the power LED as well as the On/Off cables are plugged into the right spots, although to be sure I've tried flipping these two cables around, and also plugging 1 cable into the other cable's spot & vice-versa. Is there anything else you folks think I may be missing, or anything else I can do to try to troubleshoot this issue before sending the motherboard back?

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• Why I am getting "Problem loading the page" after enabling HTTPS for Apache on Windows 7?

  - by Anish

  I enabled HTTPS on the Apache server (2.2.15) Windows 7 Enterprise by uncommenting: Include /private/etc/apache2/extra/httpd-ssl.conf in C:\Program Files (x86)\Apache Software Foundation\Apache2.2\conf\httpd.conf and modifying C:\Program Files (x86)\Apache Software Foundation\Apache2.2\conf\httpd-ssl.conf to include: DocumentRoot "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/htdocs" ServerName myserver.com:443 ServerAdmin [email protected] ... SSLCertificateFile "SSLCertificateFile "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/conf/cert.pem SSLCertificateKeyFile "SSLCertificateFile "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/conf/key.pem" Then I restart apache (going to start-All Progranms-Apache Server 2.2-Control-restart) and go to localhost on port 443 in Firefox , where I get: Index of / Index of / Links/ ..... .... But on Display of WebPage I see: Unable to connect Firefox can't establish a connection to the server at localhost. *The site could be temporarily unavailable or too busy. Try again in a few moments. *If you are unable to load any pages, check your computer's network onnection. *If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web. I read: Why am I getting 403 Forbidden after enabling HTTPS for Apache on Mac OS X? and added default web server configuration block to match my DocumentRoot The error Log C:\Program Files (x86)\Apache Software Foundation\Apache2.2\logs\error.log gives following error: The Apache2.2 service is running. (OS 5)Access is denied. : Init: Can't open server certificate file C:/Program Files (x86)/Apache Software Foundation/Apache2.2/conf/cert.pem I checked the permissions for cert.pem and it indicates: All the permissions (Full control, Read, Read and modify, execute, Write) are marked for Admin and I am currently logged in as Admin. I tried using oldcert.pem and oldkey.pem on the same server and it works fine. Is there anything that I missed?

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• asterisk extensions.conf & sip.conf

  - by Josh

  I'm trying to get my Dialplan to work. When I call, the only thing I get is a dial tone to enter extension "no Background(thanks-calling) is played". When extension 123 is dialed, busy signal is triggered and asterisk CLI get frozen. Any help will be appreciate it. Conf files below. ; PSTN on sip.conf [pstn] type=friend host=dynamic context=pstn username=pstn secret=password nat=yes canreinvite=no dtmfmode=rfc2833 qualify=yes insecure=port,invite disallow=all allow=ulaw ; PSTN on extensions.conf [pstn] exten => s,1,Answer exten => s,2,Wait,2 exten => s,4,DigitTimeout,5 exten => s,5,ResponseTimeout,10 exten => s,6,Background(thanks-calling) exten => 0,1,Goto(incoming,123,1) ; (Member Services) [incoming] exten => 123,1,NoOP(${CALLERID}) ; show the caller ID info in the console exten => 123,n,Ringing() exten => 123,n,Answer() exten => 123,n,Playback(silence/1) exten => 123,n,Playback(connecting1) exten => 123,n,Wait(3) exten => 123,n,Dial(SIP/line1,60) exten => 123,n,Congestion

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• Devices on one switch can't see devices on another switch

  - by jockey69

  I have RoadRunner Internet cable service hooked to a Motorola Surfboard modem. This is connected to a 10/100 wireless router (located in the garage). Downstairs, I have a ZyXEL GS-108b gigabit switch connected to one port on the router. From this switch I ran connections to a PS3, DVR, Vonage box and a wireless router (Buffalo AirStation 10/100). The Buffalo AirStation works as a wireless AP for other laptops, iPads and cell phones. Upstairs, I have an Asus gigabit switch connected to a gaming desktop, printer, and a media server on FreeNAS (PS3 Media Server on FreeNAS). The router is configured to assign static IPs to both the PS3 and the media server. Problem - I connect a laptop to the switch downstairs after disabling the wireless, thus making sure that I am accessing internet through the wired connection (and the router in the garage). All my computers, iPads and cell phones are able to connect to the internet without a problem. My PS3 connects to the interent with a wired connection but is unable to access the media server (I get a message that no media server is found). I used a wired laptop downstairs (connected to switch downstairs) but am unable to ping either the PS3 or media server! I may be doing something silly but am at my wits' end. Please help!

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• Basic OpenVPN setup

  - by WalterJ89

  I am attempting to connect 2 win7 (x64+ x32) computers (there will be 4 in total) using OpenVPN. Right now they are on the same network but the intention is to be able to access the client remotely regardless of its location. The Problem I am having is I am unable to ping or tracert between the two computers. They seem to be on different subnets even though I have the mask set to 255.255.255.0. The server ends up as 10.8.0.1 255.255.255.252 and the client 10.8.0.6 255.255.255.252. And a third ends up as 10.8.0.10. I don't know if this a Windows 7 problem or something I have wrong in my config. Its a very simple set up, I'm not connecting two LANs. this is the server config (removed all the extra lines because it was too ugly) port 1194 proto udp dev tun ca keys/ca.crt cert keys/server.crt key keys/server.key # This file should be kept secret dh keys/dh1024.pem server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt client-to-client duplicate-cn keepalive 10 120 comp-lzo persist-key persist-tun status openvpn-status.log verb 6 this is the client config client dev tun proto udp remote thisdomainis.random.com 1194 resolv-retry infinite nobind persist-key persist-tun ca keys/ca.crt cert keys/client.crt key keys/client.key ns-cert-type server comp-lzo verb 6 Is there anything I missed in this? keys are all correct and the vpn's connect fine, its just the subnet or route issue. Thank You

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• Need Routing help (tagged/untagged)

  - by TheCleaner

  I really need some help trying to figure some "basic" routing. My brain is fried from being sick for a week and I'm not thinking clearly. Picture below describes my "setup". I'm trying to accomplish routing a user from their workstation to the Juniper SSG520 and then "OUT" through the internet connection. I can't move the connection as it is physically located where the user's switch is. Here's what I CAN do at this point: I can ping from the Juniper SSG520 eth3/3 to 6x.xxx.253.116 from 6x.xxx.253.114 I can ping from the x450 in the top right to 6x.xxx.253.112 from 6x.xxx.253.116 What I CANNOT DO: I cannot ping from the SSG520 eth3/3 to 6x.xxx.253.112 from 6x.xxx.253.114 (basically from the Juniper box to the gateway. I've tried changing port 1 in the x450 VLAN 666 as tagged but when I do that then I can't even ping from the Juniper SSG520 eth3/3 to the VLAN on the x450 (6x.xxx.253.116). I need to route traffic out the eth3/3 interface on the SSG520 THROUGH the 2 x450 Switches and out the internet connection. The caveat is that the 2 x450 switches are connected via fiber over distance and have tagged VLANs in them for the routing. Thoughts? http://img251.imageshack.us/img251/7752/drawing1.jpg

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• SATA HDD stuttering on reads (LED on)

  - by jdehaan

  I hope I can get some new ideas to solve the issue. What I have: AMD Phenom II X4 905e Box, Sockel AM3 Gigabyte GA-MA790XTA-UD4, AMD 790X, AM3 ATX WD Caviar GreenPower 1,5TB SATA II 4GB Kit OCZ DDR3 PC3-10666 Platinum Low-Voltage CL7 HIS HD 4670 iSilence4 DDR3 1024MB Native HDMI Dual-DVI, PCI-Express Behavior: Everything works normally excepting the HDD accesses. The drive seems to get stuck in reading data (LED drive by Mainboard is on for a while) then recovers and goes on. There is a delay of more than 30s sometimes. Often it is a matter of 5-10s. This does not seem related to the workload of the disk. What I tried so far: Use different SATA port: I switched from the SATA3 to SATA2 then the SATA driven by the CPU, no difference. Turned AHCI off, drove the SATA in IDE mode, same behavior, now I felt like the HDD has problems Deactivated energy saving settings (BeQuiet, ...), disabled 3 CPUs (msconfig) supposing some race condition or trouble with changing freqs, same trouble With Windows7 Professional 64Bit, I installed the hotfix http://support.microsoft.com/?scid=kb%3Ben-us%3B976418&x=8&y=9 with no success. The problem description matches what I experienced, so I felt lucky but was quite in a sad mood after being deceived. Burned the DLG 5.04f DataLifeGuard CD from WD to check the drive. All tests passed, to my surprise! Installed an Ubuntu on the same drive i386 flavour. Drive still in IDE mode, exactly the same behavior. So the OS does not matter. What I did not try yet: http://www.gigabyte.eu/Support/Motherboard/BIOS_Model.aspx?ProductID=3263 I have a F2 BIOS and there is a F3a Beta, did someone have similar issues that were solved by this update? It is a beta so I fear upgrading a bit and I could find no release notes at all on the net, not really serious work maybe they had issues translating from Chinese??? Using another HDD drive Does someone have other hints or a similar issue? Maybe it is neither the HDD nor the Mainboard/BIOS?

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• Converting DisplayPort and/or HDMI to DVI-D?

  - by Jeff Atwood

  Newer Radeon video cards come with four ports standard: DVI (x2) HDMI DisplayPort If I want to run three 24" monitors, all of which are DVI only, from this video card -- is it possible to convert either the HDMI or DisplayPort to DVI? If so, how? And which one is easier/cheaper to convert? I did a little research and it looks like there isn't a simple "dongle" method. I found this DisplayPort to DVI-D Dual Link Adapter but it's $120; almost cheaper to buy a new monitor that supports HDMI or DisplayPort inputs at that point! There's also a HDMI to DVI-D adapter at Monoprice but I'm not sure it will work, either. AnandTech seems to imply that you do need the DisplayPort-to-DVI: The only catch to this specific port layout is that the card still only has enough TMDS transmitters for two ports. So you can use 2x DVI or 1x DVI + HDMI, but not 2x DVI + HDMI. For 3 DVI-derived ports, you will need an active DisplayPort-to-DVI adapter.

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• OpenVPN: ifup tap0 drops all connections

  - by raspi

  I'm trying to create star shaped "virtual" LAN with OpenVPN which is not connected to physical network. ie. tap0 packets should not go to eth0. Packet should only go through OpenVPN to connected clients. This setup works with my OpenVPN testing machine which runs Virtual Box but not on my actual server which is running on top of Xen. Both servers are running Ubuntu Intrepid. /etc/network/interfaces: iface tap0 inet manual address 10.10.10.1 netmask 255.255.255.0 gateway 10.10.10.1 /etc/openvpn/server.conf mode server tls-server port 1194 proto udp dev tap client-to-client ca /etc/openvpn/easy-rsa/keys/ca.crt cert /etc/openvpn/easy-rsa/keys/servername.crt key /etc/openvpn/easy-rsa/keys/servername.key dh /etc/openvpn/easy-rsa/keys/dh384.pem ifconfig-pool-persist ipp.txt server-bridge 10.10.10.1 255.255.255.0 10.10.10.128 10.10.10.250 push .route 10.10.10.1 255.255.255.0 keepalive 5 60 comp-lzo persist-key persist-tun status /var/log/openvpn-status.log log-append /var/log/openvpn.log verb 3 user nobody group nogroup ifup tap0 on Virtual Box: everything ok, SSH keeps running. But on Xen SSH connection drops and I have to reboot whole machine. What I'm missing?

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• Bad network performance on KVM guest

  - by Devator

  I have a dedicated server connected to a 1000 Mbit port. However, the Debian guest is only getting half to a 1/4 the speeds: On the node itself (Linux node 2.6.32-279.9.1.el6.x86_64 #1 SMP Tue Sep 25 21:43:11 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux): wget http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin -O /dev/null --2012-11-11 23:10:11-- http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin Resolving www.bbned.nl... 62.177.144.181 Connecting to www.bbned.nl|62.177.144.181|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1048576000 (1000M) [application/octet-stream] Saving to: â/dev/nullâ 100%[====================================>] 1,048,576,000 100M/s in 10s 2012-11-11 23:10:21 (100 MB/s) - â/dev/nullâ On the guest (Debian 6.0.5, x64: Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux): wget http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin -O /dev/null --2012-11-11 23:10:41-- http://www.bbned.nl/scripts/speedtest/download/file1000mb.bin Resolving www.bbned.nl... 62.177.144.181 Connecting to www.bbned.nl|62.177.144.181|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1048576000 (1000M) [application/octet-stream] Saving to: â/dev/nullâ 100%[=================================================================================================================================================================================================>] 1,048,576,000 16.5M/s in 42s 2012-11-11 23:11:23 (23.8 MB/s) - â/dev/nullâ I use the virtio NIC. I tried some more NICs: e1000 and the Realtek 8139 but those yield even worse results. Anyone has an idea how to improve these speeds?

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• Why am I seeing MailSlot Browse messages on unrouted ports of my Linux box?

  - by nmichaels

  I have a Linux box (Debian squeeze) with several NICs. The ones of interest are: eth3 - my main link to the network (dhcp on 10.20.30.0/24) eth0 - the first connection to my test network (static: 192.168.1.2) eth4 - the second connection to my test network (static: 192.168.1.1) My routing table looks like this: $ sudo route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.20.30.0 * 255.255.255.0 U 0 0 0 eth3 default 10.20.30.254 0.0.0.0 UG 0 0 0 eth3 I have the 2 test net ports connected to each other with a crossover cable and an instance of wireshark running on each port. Every once in a while, I'll see a packet like the following show up. Who could be doing this, and how do I convince them to stop? I do have Samba running on the machine (for a cifs mount) but don't see why it would be sending packets out to unrouted ports. I had a Windows VM running in VMWare Client and thought that might be causing it, but it still happens without it. What I want is totally silent interfaces so I can run some tests with Scapy over them.

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• Wireless Activity Monitoring for PCI DSS Compliance

  - by dkusleika

  In an effort to be PCI DSS compliant, I took a trustkeeper.net questionnaire. I failed the question that asks Is the presence of wireless access points tested for by using a wireless analyzer at least quarterly or by deploying a wireless IDS/IPS to identify all wireless devices in use? (SAQ #11.1) My only wireless access point is outside my firewall, so even if you cracked my wireless you couldn't get inside my domain (unless you crack that too). My firewall doesn't have IPS and I couldn't tell if it had IDS. I looked around for a wireless analyzer, but what I found was $500, which is a little pricey for my size business. And even if I got it, I'm not sure I would understand what it tells me. Surely there are smaller/less sophisticated businesses that take credit cards and have solved this. My questions are: What are the risks if someone were to crack my wireless? (Could they read all internet traffic? Just wireless traffic? Just use my internet connection?) And what is the best/cheapest way to test my connection point quarterly? Should I buy the $500 analyzer? Domain is Windows Server 2000. Firewall is Sonicwall Pro 2040. Router is 8 port D-link.

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• Postfix able to receive email but not able to send it

  - by c0mrade

  I had postfix running on my machine(comes with centos minimal), but today I configured it to use my domain for the sake of example this is my domain name example.com . Here is my config : alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks html_directory = no inet_interfaces = all inet_protocols = ipv4 mail_owner = postfix mailbox_size_limit = 1073741824 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man message_size_limit = 10485760 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = example.com myhostname = mail.example.com mynetworks = 127.0.0.0/8 mynetworks_style = host myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relayhost = smtp.$mydomain sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_banner = $myhostname ESMTP $mail_name smtpd_client_restrictions = permit_mynetworks,reject_unknown_client,permit smtpd_recipient_restrictions = permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject unknown_local_recipient_reject_code = 550 I need one email account to be able to send emails (password retrievals etc.). I read today somewhere that if you create unix account postfix will recognize it as email address so if your account username was ant your email would be [email protected]. So I tested that and tried to send email to [email protected] and I successfully received mail. When I try to send the email with ant task script, I'm not able to connect : Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: mail.example.com, port: 25; nested exception is: java.net.ConnectException: Connection timed out: connect What am I missing here? Edit I'm able to telnet to localhost : Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 mail.example.com ESMTP Postfix

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• Trouble with IIS SMTP relaying to Gmail

  - by saille

  I appreciate that similar questions have been asked about how to setup SMTP relaying with IIS's virtual SMTP server. However I'm still completely stumped on this problem. Here's the setup: IIS 6.0 SMTP server running on Win2k3 box with a NAT'ed IP. Company uses Gmail for all email services. An app on the box needs to send email, so normally we'd just set the app up to talk to smtp.gmail.com directly, but this app doesn't support TLS. Easy, we just setup a local SMTP relay right? So I thought. What we have done so far: Setup IIS SMTP server to relay to smtp.gmail.com, as per these excellent instructions: http://fmuntean.wordpress.com/2008/10/26/how-to-configure-iis-smtp-server-to-forward-emails-using-a-gmail-account/ The local SMTP relay allows anonymous access. Both the local IP and the loopback IP have been explicitly allowed in the Connection and Relay dialogs. Tried sending email from 2 different apps via the local SMTP server, but failed (the emails end up in the Queue folder, but never get sent). The IIS logs show the conversation with the local app, but zero conversation happening with smtp.gmail.com. The port used by gmail is open outbound, and indeed the apps we have that support TLS can send email directly via smtp.gmail.com, so there is no problem with the network. At this point I changed the smtp settings in IIS SMTP server to use a different external SMTP server and hey-presto, the local apps can send email via local IIS SMTP relay. So smtp.gmail.com fails to work with our IIS SMTP relay, but another 3rd party SMTP service works fine. We need to use smtp.gmail.com, so how to troubleshoot this one?

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