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• Any one point me how to customize facebook share

  - by Venkat

  I am trying to share my own custom url, image, title and description using Facebook and twitter. I am having lot of images and videos in my website. So i want to make my content viral on social websites. I am trying to keep share options for both facebook and twitter for everything individually. If some one share one image i want that image in the sharing thumbnail and url will be the page url with my own title, description. Based on the url i will point the user to that pic in my website. I tried in the below way. Facebook share: <a href="javascript:;" onclick="window.open('http://www.facebook.com/share.php?u=your_page_url','facebook share','resizable=yes,width=700,height=500,scrollbars=yes,status=yes')"><img alt="facebook" src="yourimage.jpg" /></a> Twitter share: <a href="javascript:;" onclick="window.open('https://twitter.com/share','twitter share','resizable=yes,width=700,height=500,scrollbars=yes,status=yes')"><img alt="twitter" src="yourimage.jpg" /></a>

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• actionscript find and convert text to url

  - by gravesit

  I have this script that grabs a twitter feed and displays in a little widget. What I want to do is look at the text for a url and convert that url to a link. public class Main extends MovieClip { private var twitterXML:XML; // This holds the xml data public function Main() { // This is Untold Entertainment's Twitter id. Did you grab yours? var myTwitterID= "username"; // Fire the loadTwitterXML method, passing it the url to your Twitter info: loadTwitterXML("http://twitter.com/statuses/user_timeline/" + myTwitterID + ".xml"); } private function loadTwitterXML(URL:String):void { var urlLoader:URLLoader = new URLLoader(); // When all the junk has been pulled in from the url, we'll fire finishedLoadingXML: urlLoader.addEventListener(Event.COMPLETE, finishLoadingXML); urlLoader.load(new URLRequest(URL)); } private function finishLoadingXML(e:Event = null):void { // All the junk has been pulled in from the xml! Hooray! // Remove the eventListener as a bit of housecleaning: e.target.removeEventListener(Event.COMPLETE, finishLoadingXML); // Populate the xml object with the xml data: twitterXML = new XML(e.target.data); showTwitterStatus(); } private function addTextToField(text:String,field:TextField):void{ /*Regular expressions for replacement, g: replace all, i: no lower/upper case difference Finds all strings starting with "http://", followed by any number of characters niether space nor new line.*/ var reg:RegExp=/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig; //Replaces Note: "$&" stands for the replaced string. text.replace(reg,"<a href=\"$&\">$&</a>"); field.htmlText=text; } private function showTwitterStatus():void { // Uncomment this line if you want to see all the fun stuff Twitter sends you: //trace(twitterXML); // Prep the text field to hold our latest Twitter update: twitter_txt.wordWrap = true; twitter_txt.autoSize = TextFieldAutoSize.LEFT; // Populate the text field with the first element in the status.text nodes: addTextToField(twitterXML.status.text[0], twitter_txt); }

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• IDC Analyst Report Touts Oracle–Accenture Strategic Initiative

  - by kristin.jellison

  Hi there, partners! Oracle Engineered Systems have been getting some love lately, and we want to share it with you! The market intelligence and advisory firm IDC recently released a report lauding Oracle and Accenture’s strategic initiative to route the performance and flexibility of Oracle Engineered Systems to clients. The report, "Oracle and Accenture Strategic Alliance Places Big Bet on Engineered Systems,” by Steve White, reflects a largely positive analysis of the relationship. White notes that the alliance is “one of the largest in the industry.” Under the relationship, Accenture has incorporated Oracle Engineered Systems—including Oracle Exadata Database Machine, Oracle Exalogic Elastic Cloud, Oracle SuperCluster, and Oracle Exalytics In-Memory Machine—into its leading datacenter transformation consulting services. Together, the two companies have also created bespoke platforms, such as the Accenture Foundation Platform for Oracle, which helps clients accelerate deployments on Oracle Fusion Middleware, running Oracle Exalogic Elastic Cloud and Oracle Exadata Database Machine. Oracle Engineered Systems deliver a single, engineered platform—including server to storage and networking. This makes it easier and cheaper for Accenture clients around the world to prepare their datacenters for managing, processing and analyzing the massive amounts of data they (rightly) anticipate seeing in the next decade. The new solutions can help reduce the effort and cost to migrate any vendor database to an Oracle Engineered Systems platform, which can lower the cost of ownership by up to 50 percent. For its part, Accenture has built a team of 300 consultants to implement and increase the flexibility and stability of client datacenters. This move further expands one of the fastest-growing full-service Oracle Enterprise solutions. Over 52,000 Accenture consultants are qualified to implement, upgrade and outsource the Oracle product suite. Accenture is a Diamond-level member of Oracle PartnerNetwork (OPN). For Oracle Partners, this update should give you at least two things to walk away with. First, this initiative is showing signs of success. As Marty Cole, group chief executive for Accenture’s Technology growth platform, put it, “We are seeing an increasing number of clients recognizing the value of consolidating their databases and taking advantage of the cost and performance benefits delivered by these solutions.” The pipeline is there—and not just for Accenture. Use this example to show your clients that investments in Oracle Engineered Systems are on the rise. Second, recognize that Oracle Engineered Systems represent one of the biggest platforms for growth that Oracle has to offer partners. As part of the agreement, Accenture is able to provide: Platform Readiness Assessments Platform Implementation App Rationalization Database Rationalization Managed Services These are all enablement opportunities you can offer customers under Oracle’s partner programs —to continue building the value of their investments, and the value of your relationship with Oracle. Take a read through the IDC report. To learn more about the partnership, see this press release. Happy selling! The OPN Communications Team

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• Normalization of database for timesheet tool and ensure data integrity

  - by fireeyedboy

  I'm creating a timesheet application. I have the following entities (amongst others): Company Employee = an employee associated with a company Client = a client associated with a company So far I have the following (abbreviated) database setup: Company - id - name Employee - id - companyId (FK to Company.id) - name Client - id - companyId (FK to Company.id) - name Now, I want an employee to be associated with a client, but only if that client is associated with the company the employee works for. How would you guarantee this data integrity on a database level? Or should I just depend on the application to guarantee this data integrity? I thought about creating a many to many table like this: EmployeeClient - employeeId (FK to Employee.id) - companyId \ (combined FK to Client.companyId, Client.id) - clientId / Thus, when I insert a client for an employee along with the employee's company id, the database should prevent this when the client is not associated with the employee's company id. Does this make sense? Because this still doesn't guarantee the employee is associated with the company. How do you deal with these things? UPDATE The scenario is as followed: A company has multiple employees. Employees will only be linked to one company. A company has multiple clients also. Clients will only be linked to one company. (Company is a sandbox, so to speak). An employee of a company can be linked to a client of it's company, but only if the client is part of the company's clientele. In other words: The application will allow a company to create/add employees and create/add clients (hence the companyId FK in the Employee and Client tables). Next, the company will be allowed to assign certain clients to certain of it's employees (EmployeeClient table). Imagine an employee working on projects for a few clients for which s/he can write billable hours, but the employee must not be allowed to write billable hours for clients they are not assigned to by their employer (the company). So, employees will not automatically have access to all their company's clients, but only to those that the company has selected for them. Hopefully this has shed some more light on the matter.

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• network design to segregate public and staff

  - by barb

  My current setup has: a pfsense firewall with 4 NICs and potential for a 5th 1 48 port 3com switch, 1 24 port HP switch, willing to purchase more subnet 1) edge (Windows Server 2003 for vpn through routing and remote access) and subnet 2) LAN with one WS2003 domain controller/dns/wins etc., one WS2008 file server, one WS2003 running Vipre anti-virus and Time Limit Manager which controls client computer use, and about 50 pcs I am looking for a network design for separating clients and staff. I could do two totally isolated subnets, but I'm wondering if there is anything in between so that staff and clients could share some resources such as printers and anti-virus servers, staff could access client resources, but not vice versa. I guess what I'm asking is can you configure subnets and/or vlans like this: 1)edge for vpn 2)services available to all other internal networks 3)staff which can access services and clients 4)clients which can access services but not staff By access/non-access, I mean stronger separation than domain usernames and passwords.

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• Wyse Z Class Thin Client (WES7) Image Deployment

  - by nsr81

  We are currently working on deploying a few Wyse WES7 thin clients (Z Class, exact model escapes me at the moment). We have WDM setup, and are able to see new clients show up, interact with them, pull/push images. Our current workflow is something like this: Unpack & boot up the device Disable Windows Firewall, reboot Device shows up in WDM Publish our custom image to the new device. My question is whether or not there is a way I can bypass step 2, and put my image on the client right out of the box. Either using PXE or USB boot disk, such that I can boot into some sort of menu and tell the client to pull a particular image from the WDM server. With HP thin clients, we have a rule setup which detects new clients on the network and pushes our custom image to them first time they show up. I haven't been able to figure it out with Wyse.

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• Home networking - Wireless switch?

  - by gamers2000

  I currently have a Linksys WRT160N that has a couple wireless clients and a few wired clients. We are planning to switch from DSL to cable and unfortunately, there isn't a cable point in a location close to the wired clients (i.e. the new location of the router would be too far from the wired clients to lay Ethernet cables). Thus, I was wondering if there was a wireless switch of some sort in which it would be a standard Ethernet switch that would connect to my wireless network? (This is a home network,of course.)

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• Load balancing and HTTPS strategies

  - by Dan

  I am faced with the following problem: Servers get saturated since current load balancing strategy is based on client IP. Some corporate clients access our servers from behind large proxies so all clients appear with same IP to our load balancer. I think we are using some hardware load balancing device (can investigate further if necessary). We need to maintain session affinity (site is constructed in ASP), so all requests with same IP get routed to the same node. Since all the communication goes over the HTTPS, no request data (like session Id) is available to balancer as a client discriminator. Is there a way to use some other data besides the IP to distinguish between clients and route the clients even when coming from same IP to different nodes? Note: I need to maintain the traffic between the balancer and nodes safe (encrypted).

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• Exchange 2010 OWA with Client Certificates

  - by Christian

  I have enabled Client Certificate Authentication for Exchange 2010 through IIS7 and the users are prompted to choose their User Certificate when they log in, but they are all then presented with the following error message Request Url: https://<domain_name>:443/owa/ User host address: <server_ip_address> OWA version: 14.1.355.2 Exception Exception type: System.NullReferenceException Exception message: Object reference not set to an instance of an object. Call stack Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.GetUserIdentities(OwaContext owaContext, OwaIdentity& logonIdentity, OwaIdentity& mailboxIdentity, Boolean& isExplicitLogon, Boolean& isAlternateMailbox, ExchangePrincipal& logonExchangePrincipal) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.InternalDispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.OwaRequestEventInspector.OnPostAuthorizeRequest(Object sender, EventArgs e) System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) The method I followed to enable Certificate authentiaction was from this post: http://www.miru.ch/2011/04/how-to-enable-certificate-based-authentication-on-exchange-2010/ Any ideas? Google isn't being very helpful

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• chrooting php-fpm with nginx

  - by dragonmantank

  I'm setting up a new server with PHP 5.3.9 and nginx, so I compiled PHP with the php-fpm SAPI options. By itself it works great using the following server entry in nginx: server { listen 80; server_name domain.com www.domain.com; root /var/www/clients/domain.com/www/public; index index.php; log_format gzip '$remote_addr - $remote_user [$time_local] "$request" $status $bytes_sent "$http_referer" "$http_user_agent" "$gzip_ratio"'; access_log /var/www/clients/domain.com/logs/www-access.log; error_log /var/www/clients/domain.com/logs/www-error.log error; location ~\.php$ { fastcgi_pass 127.0.0.1:9001; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/clients/domain.com/www/public$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_script_name; include /etc/nginx/fastcgi_params; } } It servers my PHP files just fine. For added security I wanted to chroot my FPM instance, so I added the following lines to my conf file for this FPM instance: # FPM config chroot = /var/www/clients/domain.com and changed the nginx config: #nginx config for chroot location ~\.php$ { fastcgi_pass 127.0.0.1:9001; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME www/public$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_script_name; include /etc/nginx/fastcgi_params; } With those changes, nginx gives me a File not found message for any PHP scripts. Looking in the error log I can see that it's prepending the root path to my DOCUMENT_ROOT variable that's passed to fastcgi, so I tried to override it in the location block like this: fastcgi_param DOCUMENT_ROOT /www/public/; fastcgi_param SCRIPT_FILENAME $fastcgi_script_name; but I still get the same error, and the debug log shows the full, unchrooted path being sent to PHP-FPM. What am I missing to get this to work?

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• Windows 2003 DNS updates from ISC DHCP server

  - by wolfgangsz

  We have a very mixed network, with most clients being Debian Lenny, the rest Windows XP/Vista/7. The network itself is split into two segments (for technical reasons) called "corporate" and "engineering". On the "corporate" side all clients get their IP addresses from a Windows DHCP server and the dynamic updates into the Windows DNS work just fine. On the "engineering" side, clients get their IP addresses from a linux machine running the standard ISC DHCP server. Although this server is configured to do dynamic DNS updates, they actually don't work. Anybody got any advice on how to fix this? Please note: dynamic updates from the clients directly into the DNS would work, but are not an option for us. So this is strictly on how make this work from an ISC DHCP server to a Windows DNS server.

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• Secondary DHCP server won't start on Centos 6.2

  - by Slowjoe

  I'm trying to create a backup DHCP server. Server times are in sync. Primary server starts fine. Secondary server won't start. Error from /var/log/messages is: Sep 15 14:47:45 stream dhcpd: Copyright 2004-2010 Internet Systems Consortium. Sep 15 14:47:45 stream dhcpd: All rights reserved. Sep 15 14:47:45 stream dhcpd: For info, please visit https://www.isc.org/software/dhcp/ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 25: invalid statement in peer declaration Sep 15 14:47:45 stream dhcpd: #011max-response-default Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 41: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 49: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: WARNING: Host declarations are global. They are not limited to the scope you declared them in. Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 70: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 78: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: Configuration file errors encountered -- exiting Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: This version of ISC DHCP is based on the release available Sep 15 14:47:45 stream dhcpd: on ftp.isc.org. Features have been added and other changes Sep 15 14:47:45 stream dhcpd: have been made to the base software release in order to make Sep 15 14:47:45 stream dhcpd: it work better with this distribution. Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: Please report for this software via the CentOS Bugs Database: Sep 15 14:47:45 stream dhcpd: http://bugs.centos.org/ Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: exiting. Config file contents: # DHCP Server Configuration file. # see /usr/share/doc/dhcp*/dhcpd.conf.sample # see 'man 5 dhcpd.conf' # option domain-name "eng.foo.com"; option domain-name-servers ns0.eng.foo.com, ns1.eng.foo.com; option ntp-servers ntp.eng.foo.com; #option time-servers ntp.eng.foo.com; default-lease-time 3600; max-lease-time 7200; authoritative; log-facility local7; failover peer "dhcp-failover" { secondary; address 10.0.1.70; port 647; peer address 10.0.1.11; peer port 647; max-response-default 30; max-unacked-updates 10; load balance max seconds 3; } # # Management subnet # subnet 10.0.0.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option broadcast-address 10.0.0.255; option routers 10.0.0.1; option domain-search "eng.foo.com", "foo.com"; # Unknown clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 300; range 10.0.0.240 10.0.0.249; allow unknown-clients; } # Known clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 28800; range 10.0.0.150 10.0.0.199; deny unknown-clients; } include "/etc/dhcp/dhcpd.conf-engmgmt"; } # # Data subnet # subnet 10.0.1.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option broadcast-address 10.0.1.255; option routers 10.0.1.1; option domain-search "eng.foo.com", "foo.com"; # Unknown clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 300; range 10.0.1.240 10.0.1.249; allow unknown-clients; } # Known clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 28800; range 10.0.1.150 10.0.1.199; deny unknown-clients; } # For centos network installs if substring (option vendor-class-identifier, 0, 8) = "anaconda" { filename "/autohome/distro/ks/"; next-server eng-data.eng.foo.com; } # For PXE network installs if substring (option vendor-class-identifier, 0, 9) = "PXEClient" { filename "pxelinux.0"; next-server eng-data.eng.foo.com; } # For KVM PXE network installs if substring (option vendor-class-identifier, 0, 9) = "Etherboot" { filename "pxelinux.0"; next-server eng-data.eng.foo.com; } include "/etc/dhcp/dhcpd.conf-engdata"; }

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• Strongswan and OpenVPN together

  - by cmorgia

  I have an host in Amazon EC2 which is configured with an OpenVPN Access Server. The only client to this server is acting as a gateway from a private network. I installed StrongSWAN 5 on the same host to allow windows 7 and iOS clients to connect using IPSEC. Both services works but what I cannot figure out is how to configure StrongSWAN to consider the OpenVPN tunnel endpoint as the only gateway available to clients. Basically I want all the traffic that comes from IPSEC clients to be entirely forwarded to the OpenVPN tunnel. The remote OpenVPN client that is exposing the private network has forwarding enabled and appropriate masquerading configured. The only missing point is to have the OpenVPN tunnel as the gateway for IPsEC clients

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• NATing IPv4 while routing IPv6

  - by Hugo

  I've the following setup: client(s) <---> (eth0) router (eth1) <---> wan I have a static IPv4 address and a /48 IPv6 address block. I need to connect all the clients to (wan). Each client will have it's own public IPv6. Meanwhile, I need to NAT those same clients over to (wan). Everything IPv4-related and the NAT are working fine. The IPv6 communication to/from (eth0)<-(clients) works fine, as does the IPv6 communication from (eth1)<-(wan) works fine. To provide IPv6 to all my clients, I've thought of too choices: Having the router as a gateway, which different IP on each interface. This sounds like I need to tell my ISP to route the entire block through that single IP, so it's not really an option. Transparently pass IPv6 packets to/from eth0<-eth1, so all clients can communicate with the upstream gateway (I would actually have a switch here if it weren't for the need to remain IPv4 compatible). So, since I've opted for the second choice, I'm in doubt: How can I pass all IPv6 traffic from eth0 to eth1 transparently? What I need is a level 3 bridge, but linux's bridgeutils create a level 2 bridge (which would bridge ipv4 as well, and I can't have that). This is a DD-WRT device, but it's pretty much an embeded linux, so most suggestions that would work on linux are welcome. Thanks.

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• Reverse rdesktop or VNC overlay image!

  - by carlesso

  Hi all. I've got a central server (linux based) and many clients (Windows XP Embedded, afaik) in public places around my country. I need to have these clients to connect to the server with a "reverse" tunnel, that is to say that I need to control the clients from the server but the connection is initialized by clients. The requirement is that, during the connection, an overlay image (or something like that, like a modified version of login screen) is displayed. Some stuff like "Work In Progress". My first idea was to use vncviewer -listen and vnc in reverse mode, but cannot understand how to obfuscate the work I'm doing. Other idea was to use rdesktop in "reverse" mode, but it seems it does not support it. Using rdekstop reverse seems the nicest solution (I can login back the user was in before connection, the login manager - which I can modified - is displayed), but any hint will be appreciated! Thanks in advance!

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• Multiple Homed Windows 2008 Server / Windows 7 Client

  - by Daniel Scott

  I have a small Windows 2008 network, with some Windows 7 clients. The clients are both laptops with docking stations and I would like them to communicate with the Windows 2008 server (for filesharing) through the wired network whilst they're docked. Internet connectivity for all machines (clients and server) is via a Wireless LAN, so the wireless adapter in the Windows 7 clients stays active while they're docked. When the laptops are un-docked, it would be nice to still be able to contact the windows 2008 server for print sharing (and slower file sharing) - hence the server also being on the wireless LAN. The windows 2008 server is running Active Directory, DHCP and DNS. It controls DHCP leases on the wired network and holds the DNS records for "myserver.mycompany.local", which is what the filesharing clients connect to. Ideally I'd like the DNS records to return the wired IP first so that this is the address that the laptops will attempt initially - but there doesn't seem to be a way to do that? At present the server's IP on the wireless LAN comes out of an nslookup above the wired Lan IP. The multi-homing works perfectly - but in the wrong order! Switch on the wireless lan and ping myserver and it goes to the wireless IP. Disable the wireless on the client and do the same ping again and after a couple of seconds it starts pinging the wired address. Does anyone have any suggestions on how to make this work in a predictable order? - or even if it can work. Alternative 1? If it can't work, then would this work: Remove the wireless adapter from the server, put a wireless router/bridge on the wired network (set up to route to/from the wireless LAN's subnet), then configure the clients with two routes to the (now) single IP of the server with metrics favouring direct communication over the wired LAN first? Alternative 2? Should I instead single-home the laptops so all of their connectivity is via the wired-LAN while they're docked? (and route via the windows 2008 server - or a dedicated wireless bridge/router)? My concern here is that I'd like undocking to be seamless - and if the clients are in the middle of downloading something from the internet I wouldn't want whatever they're doing interupted as they switch IP addresses onto the Wireless network. Perhaps this isn't the case and I'm concerned over nothing? Any thoughts? :) UPDATE I seem to have cracked it (at least DNS entries come out in the order I hope for - and pinging the server with various combinations of wired, wireless and both interfaces enabled uses the IP I want) ... I set the binding order of the NICs on the Server (which is acting as Domain Controller, DHCP and DNS server) so that the Wired NIC is before the Wireless adapter. (Start -- type "Network Interfaces" -- Select "View Network Connections" -- Press Alt to show classic dropdown menus -- Advanced -- Advanced Settings) Now, an nslookup (from the client) of the server's hostname returns the Wired IP first, followed by the Wireless IP. The wired IP now seems to be used whenever it's contactable. Incidentally, the metrics on the wired and wireless routes (on the client) also favour the wired LAN (based on Windows' automatically assigned metrics) - but this was always the case, even when I was having trouble getting the wired IP to be "favoured". I'm not entirely sure if this is coincidence - or if a DNS server running on Windows, handing back IP addresses for itself does actually take the binding order of it's own network interfaces into account? It would be interesting to hear from someone who can confirm or deny that (or confirm that the binding order on the server plays a role for some other reason?)

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• Howto: SaaS / PHP Application / Tenants / Security

  - by Ben Fransen

  Hi all, Being completely new in the webhostingcorner I have a few questions on how to implement/setup a webserver for a SaaS application. I'm about to rent my own server for a new product (CMS) I'm launching in two months. Developing the system wasn't that much of wild ride to me, but a correct way to implement it, is. So lets say this is my situation: I want to host 10 websites for 8 clients. There are 6 single sites, and two clients have two websites they can manage with my software. The CMS must be placed on the server too, all clients are connecting to 1 system The database must be placed Depending on the contract a client makes, the client gets some storage. How to measure the used storage over the DB, FileSystem and email Clients may not, in any case be able to somehow get outside their directory, but from the CMS directory the CMS must be able to create files and dirs in a clients directory (for templates, imagegalleries, widgets, etc, etc). I was thinking about something like a dirstructure like this: ./CMS/ [all CMS files] ./Websites/*/ [all websites] My hostingprovider will install updates to the os (CentOS, latest) and the admin panel (Direct Admin). Is there anybody with experience on this topic? Or do you have some thoughts about it? please join the conversation since I'm completely new to this. Ben

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• Moving Farm to co-location hosting - network settings requirements

  - by Saariko

  I am moving my farm (2 Dell's R620) to a co-location hosting service. I am trying to figure out the secure way to have my network settings The requirements are: VM1 is the working HOST, includes: esxi 5.1, vSphere, 4 clients (w2008r2 all) VM2 has esxi 5.1 installed, and a single machine with Veeam Backup and copy 6.5 - keeping a copy of VM1 clients on the VM2 internal storage (this solution is due to a very small budget - in case of failure on Host 1 - can redirect IP's) Only 2 VM clients require network address and access from the WWAN - ISP provides IP's range for them (with Gateway and DNS) I need connection to the iDrac's from my office (option to create a VPN-SSL tunnel) Connection to the vSphere appliances I want to be able to RDP to the VM clients The current configuration is that each host has the iDrac dedicated nic connected , and another (NIC #1) connected - with a static IP on 192.168.3.x The iDrac's have a static IP from the same network range (19.168.3.x) It will look something like this: My thoughts: On NIC#2 of both hosts I will connected a crossed cable I will give each VM clients that needs internet access a 2ndry VM network with the assigned IP from the ISP open only to web - can not access from the My Question: Should I give IP's (external) to the machines who DO NOT require WWAN Access? - I can't see a way to RDP to them directly if not. Should I use the crossed cable? or just plug NIC #2 to the switch? Will this setup even work? What do I need to verify? What Virtual nic's and/or switches should I create on the Hosts?

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• Emails sent through SMTP on VPS are considered to be spam

  - by Ilya

  During our business we have to make regular mailing to our clients: invoices, information emails, etc. Previously we received and sent emails using mail server of our hosting provider. But as the number of clients increased, we have to order VPS and install our own SMTP server their for performing our mailings. So, now we have default provider mail server for receiving emails, let it be business.com. We have email accounts like [email protected], etc. We use this mail server to receive emails and manage our email accounts. And we have SMTP server which is running on VPS. We use this SMTP only for sending emails with From addresses like [email protected]. VPS has default DNS records created by provider, let it be IP.AD.RE.SS <- ip-ad-re-ss.provider.com. Mailings are made using either desktop email clients or custom Java-based application which uses JavaMail for sending emails. The problem is that most of emails sent by us are placed in spam folders in clients email accounts. Clients have their email in Gmail, Yahoo, Hotmail, etc. Could you please tell what is the most probable reason and solution of described problem? Are there any service in Intranet where we can send test email and get an answer with description why this email could be considered to be spam?

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• Throughput; capacity planning help for C10K like design

  - by z8000

  I am designing a network service in which clients connect and stay connected -- the model is not far off from IRC less the s2s connections. I could use some help understanding how to do capacity planning, in particular with the system resource costs associated with handling messages from/to clients. There's an article that tried to get 1 million clients connected to the same server [1]. Of course, most of these clients were completely idle in the test. If the clients sent a message every 5 seconds or so the system would surely be brought to its knees. But... How do you do less hand-waving and you know, measure such a breaking point? We're talking about messages being sent by a client over a TCP socket, into the kernel, and read by an application. The data is shuffled around in memory from one buffer to another. Do I need to consider memory throughput ("5 GT/s" [2], etc.)? I'm pretty sure I have the ability to measure the basic memory requirements due to TCP/IP buffers, expected bandwidth, and CPU resources required to process messages. I'm a little dim on what I'm calling "thoughput". Help! Also, does anyone really do this? Or, do most people sort of hand-wave and see what the real world offers, and then react appropriately? [1] http://www.metabrew.com/article/a-million-user-comet-application-with-mochiweb-part-3/ [2] http://en.wikipedia.org/wiki/GT/s

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• Cannot Display Chinese Character in my PHP code

  - by Jun1st

  I want to display my Twitter Info in my blog. So I write some code to get it. the issue I got is that Chinese characters displayed as unknown code. Here is the test code. Could anyone take a look and help? Thanks <html> <title>Twitter Test</title> <body> <?php function mystique_objectToArray($object){ if(!is_object($object) && !is_array($object)) return $object; if(is_object($object)) $object = get_object_vars($object); return array_map('mystique_objectToArray', $object); } define( 'ABSPATH', dirname(dirname(__FILE__)) . '/' ); require_once('/home/jun1st/jun1stfeng.com/wp-includes/class-snoopy.php'); $snoopy = new Snoopy; $response = @$snoopy->fetch("http://twitter.com/users/show/jun1st.json"); if ($response) $userdata = json_decode($snoopy->results, true); else $error = true; $response = @$snoopy->fetch("http://twitter.com/statuses/user_timeline/jun1st.json"); if ($response) $tweets = json_decode($snoopy->results, true); else $error = true; if(!$error): // for php < 5 (included JSON returns object) $userdata = mystique_objectToArray($userdata); $tweets = mystique_objectToArray($tweets); $twitdata = array(); $twitdata['user']['profile_image_url'] = $userdata['profile_image_url']; $twitdata['user']['name'] = $userdata['name']; $twitdata['user']['screen_name'] = $userdata['screen_name']; $twitdata['user']['followers_count'] = $userdata['followers_count']; $i = 0; foreach($tweets as $tweet): $twitdata['tweets'][$i]['text'] = $tweet['text']; $twitdata['tweets'][$i]['created_at'] = $tweet['created_at']; $twitdata['tweets'][$i]['id'] = $tweet['id']; $i++; endforeach; endif; // only show if the twitter data from the database is newer than 6 hours if(is_array($twitdata['tweets'])): ?> <div class="clear-block"> <div class="avatar"><img src="<?php echo $twitdata['user']['profile_image_url']; ?>" alt="<?php echo $twitdata['user']['name']; ?>" /></div> <div class="info"><a href="http://www.twitter.com/jun1st"><?php echo $twitdata['user']['name']; ?> </a><br /><span class="followers"> <?php printf(__("%s followers","mystique"),$twitdata['user']['followers_count']); ?></span></div> </div> <ul> <?php $i = 0; foreach($twitdata['tweets'] as $tweet): $pattern = '/\@(\w+)/'; $replace = '<a rel="nofollow" href="http://twitter.com/$1">@$1</a>'; $tweet['text'] = preg_replace($pattern, $replace , $tweet['text']); $tweet['text'] = make_clickable($tweet['text']); // remove +XXXX $tweettime = substr_replace($tweet['created_at'],'',strpos($tweet['created_at'],"+"),5); $link = "http://twitter.com/".$twitdata['user']['screen_name']."/statuses/".$tweet['id']; echo '<li><span class="entry">' . $tweet['text'] .'<a class="date" href="'.$link.'" rel="nofollow">'.$tweettime.'</a></span></li>'; $i++; if ($i == $twitcount) break; endforeach; ?> </ul> <? endif?> ?> </body> </html>

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• Looking for a NTP Server Software for Windows

  - by Simon

  I'm looking for a, preferably free, NTP Server for Windows Server 2003/2008. We have already tried the built in Windows Time Server, but our tests did show that it is not very accurate, we see time differences up to 500ms. The max time difference we can allow for our application is ~100ms. Now we have already used the Meinberg NTPd for Windows. It works great except we have one big issue with it: If there is a network connection problem between the client and server, the ntp server is in a panic state It won't give the client a new time until we restart the ntp service. This is a big issue which has caused us some trouble. It was working fine for months until there was a network problem we didn't notice, we only noticed it after a week when the time difference was already 30 sec. on the clients. So please suggest some alternative NTP Server for windows. I did Google but I get a lot of unrelated search results. Edit: So far the ntpd windows version was very accurate and I'd like to stick with it. The only problem is the "panic state" after a network disconnect. Maybe some knows here what the cause of this is and how to fix it. Also, I forgot to mention that we have a server/client setup like this: Server1 -- Server2 -- Server3 -- Client1 -- Client2 -- Client3 So Server2 gets its time from Server1, Server3 gets its time from Server2, and the Clients get their time from Server3. Also, there are clients connected directly to Server2. It is important that all Servers and Clients have the exact same time (within ~100ms) Now there was a network problem with Server3 and its clients. The servers run the ntpd port for Windows, which acts as NTP server and client. The clients have Dimension4 as NTP client. After the network problem, the error message in D4 was something like this (out the top of my head, don't have the exact error message): Server response: The server is in a panic state (could not sync clock) I read through the ntpd docs, and the only mention of "panic" is when the time difference is 10000 seconds which will cause to exit the ntpd server but this was not the case. Also there is a "-g" command line switch to disable the panic exit, but it is already set by default. Any ideas what could cause the panic state and how to get rid of it next time?

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• Push Windows Updates?

  - by Edge

  Is there a method or software that will allow the ability to push windows updates to clients in an non-active directory environment? WSUS is not an option for the situation as it doesn't have the ability to push the updates to the clients, only for the clients to pull updates.

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• Can ECC registred RAM 512 MB DDR-400 be used on thinclients - specifically Neoware CA10/CA22?

  - by Ramaswami Murugan

  Can ECC registered RAM 512 MB DDR-400 be used on thin clients - specifically Neoware CA10/CA22? Neoware thin clients (now HP Thin clients e100/e140) have 2 slots for a max of 1 Gb of DDR-400 RAM (184 Pin PC3200). I notice that the price of ECC reg RAM is considerably less than that of non-reg RAM ($10 for ECC reg 512 MB vs $24 for non-ECC reg 512 MB) so this approach is worth it for me to upgrade my memory on numerous thin clients (approx 40). The BIOS is Phoenix E686 and the chipset is VIA 800MHz - 1 Ghz.

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• How can I set up OpenVPN to accept more than 60 connections?

  - by Robin

  Greetings! We're using OpenVPN and today hit an unexpected connection limit of 60 - even though max-clients is set to the source code default 1024. Server log: Tue Dec 21 13:49:41 2010 MULTI: new incoming connection would exceed maximum number of clients (60) We're slowly adding new clients to the VPN and expect to hit 200 some time next year, if we can get it working. We're running the server on a Win2003 R2. OpenVPN 2.0.9 Server config as follows: local 192.168.10.211 port 1195 proto tcp dev tun dev-node OpenVPN_Vision ca vision_ca.crt cert vision_server.crt key vision_server.key # This file should be kept secret dh vision_dh1024.pem server 192.168.211.0 255.255.255.0 ifconfig-pool-persist vision_ipp.txt ;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100 ;client-to-client keepalive 10 120 comp-lzo ;max-clients 100 # Default in source code is 1024 persist-key persist-tun status openvpn-status-vision.log log vision.log verb 3 I would greatly appreciate any help or input on this one. Thanks! Best regards, Robin

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