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  • Backup data rate on Raspberry Pi maxing out at 5 Mb/s. Why?

    - by bastibe
    I set up my Raspberry Pi as a Time Machine, as documented here. At the moment, the Raspberry Pi is connected to my MacBook Pro using a direct Ethernet cable. Also, an external hard drive (laptop drive) is connected to the Raspberry Pi using the USB port. However, backups are pretty slow. Activity Monitor claims that the Network is transferring a very steady 5 Mb/s, where my Time Capsule is transferring up to 8 Mb/s with a lot of fluctuation. The Raspberry Pi self-reports (top) that its CPU is only half-used, with about equal parts afpd, usb-storage and jbd2/sda1-8. Thus, I think that the processing power of the Raspberry Pi does not seem to be the problem here. To me, this looks like there is some kind of bottleneck that maxes out at 5 Mb/s thus potentially having my backups run at less than their potential speed. To the best of my knowledge, this might be the afp-daemon, the usb-bus or the external hard drive. So, my question is, how could I identify the true culprit and what can I do about it?

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  • Users can't change password trough OWA for Exchange 2010

    - by Rémy Roux
    Here's our problem, users who want to change their password trough OWA get this error "The password you entered doesn't meet the minimum security requirements.", even if users are respecting the minimum security requirements. With these settings, we have the error: Enforced password history 1 passwords remembered Maximum password age 185 days Minimum password age 1 day Minimum password length 7 characters Password must meet complexity requirements enabled With these test settings, we don't have an error: Enforced password history not defined Maximum password age not defined Minimum password age not defined Minimum password length not defined Password must meet complexity requirements not defined People can change their password but there is no more security! Just changing one parameter of the GPO for example "Enforced password history", brings back this error. Here's our server configuration : Windows Server 2008 R2 Exchange Server 2010 Version: 14.00.0722.000 If anybody has a clue it would very helpful !

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  • Cannont add service account to domain group during sql cluster install

    - by Sam
    I'm installing a 2008 instance on a 2003 machine which is already running 2005. I need to set up domain groups for the security setup step: http://msdn.microsoft.com/en-us/library/ms179530.aspx On Windows Server 2003, specify domain groups for SQL Server services. All resource permissions are controlled by domain-level groups that include SQL Server service accounts as group members. Much more info on this here: http://support.microsoft.com/kb/910708 I've had problems with being able to add the windows service accounts to the groups at install time. The security admins had to make my account a domain admin - which they were hesitant to do. The account under which SQL Server Setup is running must have permissions to add accounts to the domain groups. Is there a specific security setting which would allow my account to add accounts to a group?

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  • Security System Preference won't open on Macos 10.6 Snow Leopard

    - by adambox
    When I try to open the Security preference pane on my iMac running Mac OS 10.6.6, it says "loading..." and it never opens. I get this in the console: 3/5/11 4:16:56 PM System Preferences[724] Could not connect the action resetLocationWarningsSheetOk: to target of class AppleSecurity_Pref 3/5/11 4:16:56 PM System Preferences[724] Could not connect the action resetLocationWarningsSheetCancel: to target of class AppleSecurity_Pref 3/5/11 4:16:56 PM System Preferences[724] *** -[NSCFDictionary initWithObjects:forKeys:count:]: attempt to insert nil value at objects[0] (key: NSFont)

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  • Secure Server Distro

    - by Drama
    Hello, I have a root-server (i7/24GB/1TB) running Ubuntu 10.04 LTS as my OS. After some security audits (OpenVAS, Retina etc) I see that Ubuntu isn't the most secure system for a semi-corporate environment. Its updated from many sources, ofc from the Ubuntu security repo too. But nevertheless I could exploit my OpenSSL install with an exploit from August/September. There are some critical updates needed which Ubuntu does not provide. I was using Debian and Ubuntu for almost 5 years but now I doubt. What distro is secure and up to date from your point of view? How can I make the server more secure? Outsourcing of every software-module to a VM? I am not new to server-hardening, my packages are up to date I read Ubuntu Security Notices and I have no unneeded services installed on my server. Thanks.

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  • Excel: What formula combines this data into one COUNT amount?

    - by Mike
    I have 30 colleagues who are answering questions over 3 time periods. Each has their own Excel workbook with the questions, and over the year they update it. I collate their worksheets into one master worksheet, but now need to combine their answers into a simple table. The questions, the time periods and then a COUNT of how many answered it. For example: I need a table that shows me how many people (not the persons name at this point) answered question 10 in time period 2. I can't use a database before someone mentions it ;). Many thanks Mike.

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  • debian LTS : how to keep packages up-to-date with last security fixes using apt

    - by Quentin
    What's the best way to keep packages up-to-date (ie with the last security fixes) without worried about major version update ? For instance, apache2 for squeezeis is 2.2.16 (https://packages.debian.org/source/squeeze/apache2) However, last apache2 version for the 2.2.x branch is 2.2.27 Test repository can't be used since they use the 2.4.x versions and I'd like to stick on the 2.2.x (to avoid migration issues) How would you handle this situation and how can I update to 2.2.27 ?

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  • HTTP, HTTPS and FTP is not working but SMTP and IMAP are working.

    - by nWorx
    Yesterday on a computer of a friend a strange thing happened. after booting the ports fo http, https and ftp are closed but e-mail is still working. in the control panel the windows firewall seems active even if he tries to deactivate it. I have a suspision that it is the faul of norton internet security 2010, we have tried to uninstall it, but the uninstallation did not work. when using the removal tool from symantec it just goes to 23% and then it crashes. the process ccSvcHst.exe is still running. How can I safely remove the rest of Norton Internet Security? Edit: Norton Internet Security 2010 is sucesfully removed, but still no connectivity...

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  • AD reset user passwords for a security group

    - by Nathan C
    I'm not quite sure if this is possible or not, but I need to force a certain security group's users to have their passwords expire so they'll be forced to change them on next login. The reason for this is because I applied a FGPP (password policy) to this particular group in order to enforce strong passwords. Well, many users have really weak passwords and they won't be changed unless they're forced. Is there a way to do this without forcing everyone to a single password?

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  • Amazon EC2 open ports for security groups present in other accounts

    - by rahul
    Hi, Assume, I am having 2 ec2 accounts (say A and B), both have different list of security groups. Now I want to open a particular port (say 80) for an instance running in account A, to account B. ie, I want to only allow account B instances, to access account A's 80 port. Could any one update me, is there a way to do this.?? Additionally, may I access account A's instance from account B's instance by using its private ip address/host name ?? Thanks in Advance,

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  • How to store data on a machine whose power gets cut at random

    - by Sevas
    I have a virtual machine (Debian) running on a physical machine host. The virtual machine acts as a buffer for data that it frequently receives over the local network (the period for this data is 0.5s, so a fairly high throughput). Any data received is stored on the virtual machine and repeatedly forwarded to an external server over UDP. Once the external server acknowledges (over UDP) that it has received a data packet, the original data is deleted from the virtual machine and not sent to the external server again. The internet connection that connects the VM and the external server is unreliable, meaning it could be down for days at a time. The physical machine that hosts the VM gets its power cut several times per day at random. There is no way to tell when this is about to happen and it is not possible to add a UPS, a battery, or a similar solution to the system. Originally, the data was stored on a file-based HSQLDB database on the virtual machine. However, the frequent power cuts eventually cause the database script file to become corrupted (not at the file system level, i.e. it is readable, but HSQLDB can't make sense of it), which leads to my question: How should data be stored in an environment where power cuts can and do happen frequently? One option I can think of is using flat files, saving each packet of data as a file on the file system. This way if a file is corrupted due to loss of power, it can be ignored and the rest of the data remains intact. This poses a few issues however, mainly related to the amount of data likely being stored on the virtual machine. At 0.5s between each piece of data, 1,728,000 files will be generated in 10 days. This at least means using a file system with an increased number of inodes to store this data (the current file system setup ran out of inodes at ~250,000 messages and 30% disk space used). Also, it is hard (not impossible) to manage. Are there any other options? Are there database engines that run on Debian that would not get corrupted by power cuts? Also, what file system should be used for this? ext3 is what is used at the moment. The software that runs on the virtual machine is written using Java 6, so hopefully the solution would not be incompatible.

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  • Logins with only HTTP - are they as insecure as I'm thinking?

    - by JoeCool1986
    Recently I was thinking about how websites like gmail and amazon use HTTPS during the login process when accessing your account. This makes sense, obviously, since you're typing in your account username and password and you would want that to be secure. However, on Facebook, among countless other websites, their logins are done with simple HTTP. Doesn't that mean that my login name and password are completely unencrypted? Which, even worse, means that all those people who login to their facebooks (or similar sites) at a wifi hotspot in public are susceptible to anyone getting their credentials using a simple packet sniffer (or something similar)? Is it really that easy? Or am I misunderstanding internet security? I'm a software engineer working on some web related stuff, and although at the current time I'm not too involved with the security aspect of our software, I knew I should probably know the answer to this question, since it's extremely fundamental to website security. Thanks!

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  • How to effectively secure a dedicated server for intranet use?

    - by Mark
    I need to secure a dedicated server for intranet use, the server is managed so will have software based security, but what other security should be considered for enterprise level security? The intranet is a host for an ECM (Alfresco) managing and storing sensitive documents. As the information is sensitive we are trying to make it as secure as reasonably possible (requirement in UK law). We plan to encrypt the data on the database. It will be connected to via SSL encryption. Should we consider Hardware firewall, Private lan between the application server and database server?

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  • Cross Domain access of self hosted WCF services?

    - by Macnique
    I have developed a WPF application which communicates with a set of self hosted WCF services which are under same domain and I use the following setup in the config files. <security mode="Transport"> <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" /> <message clientCredentialType="Windows" /> </security> I hosted the services on a server in different domain .I can achieve the communication by setting the security mode to "None" which is not ideal. Is there any other setting i can user for cross domain communication or i have to do with some trusted certificates ? I would be glad if some one can guide me because all the searches on google directed me to silverlight applications +Crossdomain.xml+WCF but i have't seen any combination of WPF on crossdomain environment.

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  • Editing java.security - says it is [read only] (Fedora)

    - by jax
    I am trying to edit the file java.security but it opens as read only. I am running as root user but I think this is happening because the java process is currently using the file. How can I temporarily close the process and edit the file and then start java up again? I am using Fedora.

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  • S#harp architecture mapping many to many and ado.net data services: A single resource was expected f

    - by Leg10n
    Hi, I'm developing an application that reads data from a SQL server database (migrated from a legacy DB) with nHibernate and s#arp architecture through ADO.NET Data services. I'm trying to map a many-to-many relationship. I have a Error class: public class Error { public virtual int ERROR_ID { get; set; } public virtual string ERROR_CODE { get; set; } public virtual string DESCRIPTION { get; set; } public virtual IList<ErrorGroup> GROUPS { get; protected set; } } And then I have the error group class: public class ErrorGroup { public virtual int ERROR_GROUP_ID {get; set;} public virtual string ERROR_GROUP_NAME { get; set; } public virtual string DESCRIPTION { get; set; } public virtual IList<Error> ERRORS { get; protected set; } } And the overrides: public class ErrorGroupOverride : IAutoMappingOverride<ErrorGroup> { public void Override(AutoMapping<ErrorGroup> mapping) { mapping.Table("ERROR_GROUP"); mapping.Id(x => x.ERROR_GROUP_ID, "ERROR_GROUP_ID"); mapping.IgnoreProperty(x => x.Id); mapping.HasManyToMany<Error>(x => x.Error) .Table("ERROR_GROUP_LINK") .ParentKeyColumn("ERROR_GROUP_ID") .ChildKeyColumn("ERROR_ID").Inverse().AsBag(); } } public class ErrorOverride : IAutoMappingOverride<Error> { public void Override(AutoMapping<Error> mapping) { mapping.Table("ERROR"); mapping.Id(x => x.ERROR_ID, "ERROR_ID"); mapping.IgnoreProperty(x => x.Id); mapping.HasManyToMany<ErrorGroup>(x => x.GROUPS) .Table("ERROR_GROUP_LINK") .ParentKeyColumn("ERROR_ID") .ChildKeyColumn("ERROR_GROUP_ID").AsBag(); } } When I view the Data service in the browser like: http://localhost:1905/DataService.svc/Errors it shows the list of errors with no problems, and using it like http://localhost:1905/DataService.svc/Errors(123) works too. The Problem When I want to see the Errors in a group or the groups form an error, like: "http://localhost:1905/DataService.svc/Errors(123)?$expand=GROUPS" I get the XML Document, but the browser says: The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. -------------------------------------------------------------------------------- Only one top level element is allowed in an XML document. Error processing resource 'http://localhost:1905/DataServic... <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> -^ I view the sourcecode, and I get the data. However it comes with an exception: <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> <code></code> <message xml:lang="en-US">An error occurred while processing this request.</message> <innererror xmlns="xmlns"> <message>A single resource was expected for the result, but multiple resources were found.</message> <type>System.InvalidOperationException</type> <stacktrace> at System.Data.Services.Serializers.Serializer.WriteRequest(IEnumerator queryResults, Boolean hasMoved)&#xD; at System.Data.Services.ResponseBodyWriter.Write(Stream stream)</stacktrace> </innererror> </error> A I missing something??? Where does this error come from?

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  • Data Warehouse ETL slow - change primary key in dimension?

    - by Jubbles
    I have a working MySQL data warehouse that is organized as a star schema and I am using Talend Open Studio for Data Integration 5.1 to create the ETL process. I would like this process to run once per day. I have estimated that one of the dimension tables (dimUser) will have approximately 2 million records and 23 columns. I created a small test ETL process in Talend that worked, but given the amount of data that may need to be updated daily, the current performance will not cut it. It takes the ETL process four minutes to UPDATE or INSERT 100 records to dimUser. If I assumed a linear relationship between the count of records and the amount of time to UPDATE or INSERT, then there is no way the ETL can finish in 3-4 hours (my hope), let alone one day. Since I'm unfamiliar with Java, I wrote the ETL as a Python script and ran into the same problem. Although, I did discover that if I did only INSERT, the process went much faster. I am pretty sure that the bottleneck is caused by the UPDATE statements. The primary key in dimUser is an auto-increment integer. My friend suggested that I scrap this primary key and replace it with a multi-field primary key (in my case, 2-3 fields). Before I rip the test data out of my warehouse and change the schema, can anyone provide suggestions or guidelines related to the design of the data warehouse the ETL process how realistic it is to have an ETL process INSERT or UPDATE a few million records each day will my friend's suggestion significantly help If you need any further information, just let me know and I'll post it. UPDATE - additional information: mysql> describe dimUser; Field Type Null Key Default Extra user_key int(10) unsigned NO PRI NULL auto_increment id_A int(10) unsigned NO NULL id_B int(10) unsigned NO NULL field_4 tinyint(4) unsigned NO 0 field_5 varchar(50) YES NULL city varchar(50) YES NULL state varchar(2) YES NULL country varchar(50) YES NULL zip_code varchar(10) NO 99999 field_10 tinyint(1) NO 0 field_11 tinyint(1) NO 0 field_12 tinyint(1) NO 0 field_13 tinyint(1) NO 1 field_14 tinyint(1) NO 0 field_15 tinyint(1) NO 0 field_16 tinyint(1) NO 0 field_17 tinyint(1) NO 1 field_18 tinyint(1) NO 0 field_19 tinyint(1) NO 0 field_20 tinyint(1) NO 0 create_date datetime NO 2012-01-01 00:00:00 last_update datetime NO 2012-01-01 00:00:00 run_id int(10) unsigned NO 999 I used a surrogate key because I had read that it was good practice. Since, from a business perspective, I want to keep aware of potential fraudulent activity (say for 200 days a user is associated with state X and then the next day they are associated with state Y - they could have moved or their account could have been compromised), so that is why geographic data is kept. The field id_B may have a few distinct values of id_A associated with it, but I am interested in knowing distinct (id_A, id_B) tuples. In the context of this information, my friend suggested that something like (id_A, id_B, zip_code) be the primary key. For the large majority of daily ETL processes (80%), I only expect the following fields to be updated for existing records: field_10 - field_14, last_update, and run_id (this field is a foreign key to my etlLog table and is used for ETL auditing purposes).

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  • Change Data Capture Webinar

    I am going to be doing a webinar with our friends at Attunity on Change Data Capture.  Attunity have a good story around this technology and you can use it in your SSIS loads to great effect. Join Attunity and Konesans/SQLIS for a Webinar on 17 September Space is limited. Reserve your Webinar seat now at: https://www1.gotomeeting.com/register/693735512 Want increased efficiency and real-time speed when conducting ETL loads? Need lower implementation costs while minimizing system impact? Learn how change data capture (CDC) technologies can reduce ETL load times. Allan Mitchell, Principal Consultant at Konesans and SQLServer MVP specialising in ETL, will explain CDC concepts and benefits and how CDC can dramatically reduce ETL load times. Ian Archibald, Pre-Sales Director EMEA for Attunity, will present and demonstrate Attunity's award-winning Oracle-CDC for SSIS, a fully-integrated SSIS solution for designing, deploying and managing Oracle CDC processes. Title: Change Data Capture - Reducing ETL Load Times Date: Thursday, September 17, 2009 Time: 10:00 AM - 11:00 AM BST ABOUT THE SPEAKERS: Allan Mitchell is the joint owner of Konesans Ltd, a UK based consultancy specializing in SQL Server, and most importantly SQL Server Integration Services. Having been working with SQL Server from 6.5 onwards, he has extensive experience in many aspects of SQL Server, but now focuses on the BI suite of tools. He is a SQL Server MVP, a frequent poster on the MS SSIS/DTS newsgroups, and runs the sqldts.com and sqlis.com resource sites. Ian Archibald, Attunity Pre-Sales Director EMEA, has worked in Attunity’s UK Office for 17 years. An expert in Attunity solutions, Ian has extensive knowledge of Attunity’s products and data integration & CDC technologies. After registering you will receive a confirmation email containing information about joining the Webinar. System Requirements PC-based attendees Required: Windows® 2000, XP Home, XP Pro, 2003 Server, Vista Macintosh®-based attendees Required: Mac OS® X 10.4 (Tiger®) or newer

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  • Change Data Capture Webinar

    I am going to be doing a webinar with our friends at Attunity on Change Data Capture.  Attunity have a good story around this technology and you can use it in your SSIS loads to great effect. Join Attunity and Konesans/SQLIS for a Webinar on 17 September Space is limited. Reserve your Webinar seat now at: https://www1.gotomeeting.com/register/693735512 Want increased efficiency and real-time speed when conducting ETL loads? Need lower implementation costs while minimizing system impact? Learn how change data capture (CDC) technologies can reduce ETL load times. Allan Mitchell, Principal Consultant at Konesans and SQLServer MVP specialising in ETL, will explain CDC concepts and benefits and how CDC can dramatically reduce ETL load times. Ian Archibald, Pre-Sales Director EMEA for Attunity, will present and demonstrate Attunity's award-winning Oracle-CDC for SSIS, a fully-integrated SSIS solution for designing, deploying and managing Oracle CDC processes. Title: Change Data Capture - Reducing ETL Load Times Date: Thursday, September 17, 2009 Time: 10:00 AM - 11:00 AM BST ABOUT THE SPEAKERS: Allan Mitchell is the joint owner of Konesans Ltd, a UK based consultancy specializing in SQL Server, and most importantly SQL Server Integration Services. Having been working with SQL Server from 6.5 onwards, he has extensive experience in many aspects of SQL Server, but now focuses on the BI suite of tools. He is a SQL Server MVP, a frequent poster on the MS SSIS/DTS newsgroups, and runs the sqldts.com and sqlis.com resource sites. Ian Archibald, Attunity Pre-Sales Director EMEA, has worked in Attunity’s UK Office for 17 years. An expert in Attunity solutions, Ian has extensive knowledge of Attunity’s products and data integration & CDC technologies. After registering you will receive a confirmation email containing information about joining the Webinar. System Requirements PC-based attendees Required: Windows® 2000, XP Home, XP Pro, 2003 Server, Vista Macintosh®-based attendees Required: Mac OS® X 10.4 (Tiger®) or newer

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  • error 503: service unavailable when using apt-get update behind proxy

    - by ubuntu2man
    Hi, I am using a transparent proxy (other box). When I try to do an 'apt-get update' I get these warnings (in german): ... W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/restricted/source/Sources.gz 503 Service Unavailable W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/universe/source/Sources.gz 503 Service Unavailable W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/multiverse/source/Sources.gz 503 Service Unavailable W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/main/binary-i386/Packages.gz 503 Service Unavailable W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/restricted/binary-i386/Packages.gz 503 Service Unavailable W: Fehlschlag beim Holen von http://security.ubuntu.com/ubuntu/dists/maverick-security/universe/binary-i386/Packages.gz 503 Service Unavailable E: Einige Indexdateien konnten nicht heruntergeladen werden, sie wurden ignoriert oder alte an ihrer Stelle benutzt. I changed ~.bashrc: http_proxy=http://192.168.120.199:8080 https_proxy=https://192.168.120:8080 export http_proxy export https_proxy I wrote on commandline: export http_proxy=http://proxyusername:proxypassword@proxyaddress:proxyport sudo apt-get update And I edited /etc/apt/apt.conf: Acquire::http::proxy "http://192.168.120.199:8080/"; Acquire::ftp::proxy "http://192.168.120.199:8080/"; Nothing has worked. Does anyone knows how to make apt-get working through a transparent proxy? Regards, ubuntu2man

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  • Accessing Server-Side Data from Client Script: Accessing JSON Data From an ASP.NET Page Using jQuery

    When building a web application, we must decide how and when the browser will communicate with the web server. The ASP.NET WebForms model greatly simplifies web development by providing a straightforward mechanism for exchanging data between the browser and the server. With WebForms, each ASP.NET page's rendered output includes a <form> element that performs a postback to the same page whenever a Button control within the form is clicked, or whenever the user modifies a control whose AutoPostBack property is set to True. On postback, the server sends the entire contents of the web page back to the browser, which then displays this new content. With WebForms we don't need to spend much time or effort thinking about how or when the browser will communicate with the server or how that returned information will be processed by the browser. It just works. While this approach certainly works and has its advantages, it's not without its drawbacks. The primary concern with postback forms is that they require a large amount of information to be exchanged between the browser and the server. Specifically, the browser sends back all of its form fields (including hidden ones, like view state, which may be quite large) and then the server sends back the entire contents of the web page. Granted, there are scenarios where this large quantity of data needs to be exchanged, but in many cases we can use techniques that exchange much less information. However, these techniques necessitate spending more time and effort thinking about how and when to have the browser communicate with the server and intelligently deciding on what information needs to be exchanged. This article, the first in a multi-part series, examines different techniques for accessing server-side data from a browser using client-side script. Throughout this series we will explore alternative ways to expose data on the server so that it can be accessed from the browser using script; we will also examine various tools for communicating with the server from JavaScript, including jQuery and the ASP.NET AJAX library. Read on to learn more! Read More >

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