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• Modify HTML Content with Squid

  - by user38400

  We have setup our network as per the tutorial here: https://help.ubuntu.com/community/Upside-Down-TernetHowTo. Basically, we have a squid proxy that inverts images for pages that clients request. We're trying to modify the script so that we can edit the contents of the webpage before the webpage is sent to the client. We are not having any luck. I'm wondering if there is something different about .html files that makes this not possible. What is happening is that we do a wget on the URI that is requested, save it locally, modify it and then echo back the new URI. The page that the user gets is the unmodified page and not the one that we just changed.

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• ArchBeat Link-o-Rama for 101/10/2011

  - by Bob Rhubart

  All day, all architecture. Oracle Technology Network Architect Day - Phoenix, AZ - Dec 14. Free registration. Spend the day with your peers learning from Oracle experts in Cloud Computing, Engineered Systems, Oracle WebLogic, Oracle Coherence, Application-Driven Virtualization, and more. Registration is free, but seating is limited. Register now! Data Integration - Bad data is really the monster | Bikram Sinha "Bad data can cause huge operational failure and cost millions of dollars in terms of time and resources to clean up and validate data across multiple participating systems," says Bikram Sinha. Changing a navigation model on a page in WebCenter | Edwin Biemond Another illustrated how-to from Oracle ACE Edwin Biemond. Why do I need an Authenticator when I have an Identity Asserter? | Chris Johnson Chris Johnson responds to a user question. OOW: The Most Important Thing | Floyd Teter Oracle ACE Director Floyd Teter explains why he sees "the inclusion of Fusion Applications CRM and HCM in the Oracle Public Cloud" as the most important news to come out of Oracle OpenWorld 2011. Oracle Releases Oracle Solaris 11 | Gokhan Atil Atil offers an overview of some of the "key points" of the new Solaris 11 release. SOA Development Virtual Developer Day (On Demand) You won't get the hands-on experience available in the live event, but if you will learn learn how a SOA approach can be implemented, whether starting afresh with new services or reusing existing services. Webcast: Maximum Availability on Private Clouds - Nov 10 - 10am PT/ 1pm ET Featuring Margaret Hamburger (Director, Product Marketing, Oracle) and Joe Meeks (Director, Product Management, Oracle). Should Enterprise Architecture Teams Be More Focused on Innovation? | Richard Seroter Richard Seroter looks answers among opinions offered by Forrester analyst Brian Hopkins and Jude Umeh of CapGemini.

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• Is there any viable alternative to using a linux/unix/BSD firewall/router/vpn?

  - by ObligatoryMoniker

  I am trying to purchase something to replace our Vyatta router that is running in a virtual machine on Hyper V (having the whole network go down when the host has to reboot is not convenient and I am getting the sense that this configuration may not be stable). Most posts on this topic suggest using Linux/OpenBSD/FreeBSD/etc with some recommendations to use appliances from vendors for specific purposes like firewall and VPN. We are a windows shop and it has been a stretch for us to make use of Vyatta but since it was free and straightforward to use we decided to use it. Now we need something that is easier for our team to (re)deploy and manage. I would rather purchase something windows based or an appliance that can do all of the following things: DHCP server (reservations, specified gateway, dns, etc) Static Routes that route traffic across three interfaces Easily Reproducible (Powershell script, Puppet, Chef, etc) Intuitive interface (Decent web interface would be fine but I don't want them to have to go to CLI) Does any one have any recommendations on what I should be looking at that might meet our needs?

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• Technical Questions for Java Experts

  - by Tori Wieldt

  The "Oracle Technology Network" (meaning me) will be at Devoxx next week doing interviews with Java experts. Do you have technical questions about Project Jigsaw, JavaFX or Java on MacOS? Take a look at the list below of experts and topics. Leave your questions as a comment on this blog and I'll do my best to include them. Most of the interviews happen Tuesday, so get you questions in quickly. Thanks! Interviewee InterviewTopic Arun Gupta and Alexis Moussine-Pouchkine Java EE Mark Reinhold OpenJDK Mark Reinhold Project Jigsaw Jasper Potts JavaFX Scott Kovatch Java on Mac OS Brian Goetz & Mark Reinhold JDK 8 Brian Goetz Project Lambda Steven Chin JavaFX Marek Potociar JAX-RS Claude Falguiere Dev for Tablets Alan Bateman NIO2 Regina ten Bruggencate JDuchess Martijn Verburg Adopt a JSR Note: This is different than the call for questions for the Fireside chat on Tuesday afternoon, Devoxx conference keynote speakers (Henrik Ståhl, senior director of product management for the Java platform at Oracle, and Cameron Purdy, VP of development for the Java EE platform) and the technical discussion panel on Friday morning. Leave (and vote on) those questions here. 

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• Ubuntu 9.10 X Stuck in restart loop - I think...

  - by widgisoft

  Trying out Ubuntu, installation went fine - upgraded to the proprietary nVidia drivers but on restart I get a login prompt and the screen is flashing really fast almost as if Xserver is trying to start and failing, I can type when the screen isn't in a "flash" as it were and it's so fast and random it's hard to even type a login name without it missing some characters - this makes typing a password (i.e. not being able to see which characters made it or not) very hard. I can log back into the live cd and alter my settings - but I can't even find out how to stop X stop starting on boot; Looks like they've moved everything around :-p I'd like to: Stop X from crashing and going insane (if it is actually Xserver) Know how to stop X from starting on bootup, Looks like interactive boot is also off by default now Update: A temporary work around seems to be enabling ssh and just connecting to the box over the network - ssh seems to work fine :-p Cheers, Chris

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• FTP Issue when connecting to a debian machine from windows

  - by erin c

  I have a .net application which copies bunch of files to a specific FTP folder on a debian machine on periodical basis, ftp folder has 755 mod, owner of the directory is the ftp username that I authenticate in .net application. So far I tested this application with bunch of debian boxes, my initial attempts generally fail with following message if I try it with a debian machine that I haven't tried it before: "remote server returned an error 550 File unavailable" When I see this error, I log onto another debian machine on my network, and I try FTP'ing the debian box that returns the error message from command line. I generally "put" a very small file to the folder in question, right after that windows application starts copying files successfully via FTP. It is as if my command line ftp operation fixes the problem and makes debian compatible with my .net application. I checked permissions before and after the problem, it doesn't look like what I did changed anything, I am at loss understanding why this problem occurs and why it is fixed with my silly hack. Can anybody tell me where to look at next to fix this extremely annoying issue?

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• Netcat I/O enhancements

  - by user13277689

  When Netcat integrated into OpenSolaris it was already clear that there will be couple of enhancements needed. The biggest set of the changes made after Solaris 11 Express was released brings various I/O enhancements to netcat shipped with Solaris 11. Also, since Solaris 11, the netcat package is installed by default in all distribution forms (live CD, text install, ...). Now, let's take a look at the new functionality: /usr/bin/netcat alternative program name (symlink) -b bufsize I/O buffer size -E use exclusive bind for the listening socket -e program program to execute -F no network close upon EOF on stdin -i timeout extension of timeout specification -L timeout linger on close timeout -l -p port addr previously not allowed usage -m byte_count Quit after receiving byte_count bytes -N file pattern for UDP scanning -I bufsize size of input socket buffer -O bufsize size of output socket buffer -R redir_spec port redirection addr/port[/{tcp,udp}] syntax of redir_spec -Z bypass zone boundaries -q timeout timeout after EOF on stdin Obviously, the Swiss army knife of networking tools just got a bit thicker. While by themselves the options are pretty self explanatory, their combination together with other options, context of use or boundary values of option arguments make it possible to construct small but powerful tools. For example: the port redirector allows to convert TCP stream to UDP datagrams. the buffer size specification makes it possible to send one byte TCP segments or to produce IP fragments easily. the socket linger option can be used to produce TCP RST segments by setting the timeout to 0 execute option makes it possible to simulate TCP/UDP servers or clients with shell/python/Perl/whatever script etc. If you find some other helpful ways use please share via comments. Manual page nc(1) contains more details, along with examples on how to use some of these new options.

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• Which is the best opensource IT infra management s/w?

  - by karthick

  I am looking for some opensource IT infrastructure management s/w which should be able to monitor, manage servers & pc's, network devices, printers etc and it should have patch management, software inventory, user activity data etc And I am planning to have it on a linux server and it should be manageable for both linux and windows machines. I have found many while googling, but I don't know which is the best one. So anyone please suggest me, which is the best one I am looking for?.... Thanks... Your help is greatly appreciated..

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• rpd over https using a linux client

  - by Nils

  My employer switched from vpn and rdp to using what our admin calls "rdp over https". Since that switch I find myself unable to connect to the "new" rdp server. I think the progress is as follows: A rdp gateway-server is connected via tls the requested sever (different from the gateway-server) is then connected through the tls connection. In windows mstsc-settings the server name is the "internal network name" of the machine I wish to connect. And on the last tab (in German it is called "leistung" - could be activity) I go to the "connection from everywhere" settings and set the gateway-server under gateway-server. Now: Is there any way to use this scenario under linux (apart from a virtual machine running Windows)? I am interested in free ideas (e.g. is it possible to create a tls tunnel and connect through that using freerdp/rdesktop?) non-free ideas. As long as they work I'll worry about the costs later. Free ideas would be better :-)

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• NIC bonding with two uplinks

  - by Karolis T.

  Is bonding the preferred way of implementing ISP redundancy? In the texts I've seen, bond device has a netmask, gateway of it's own. How can this be obtained if there are two different gateways from two uplinks, which one to choose? Do I need any special routing rules to go with it or does simply configuring separate interfaces (using Debian, /etc/network/interfaces), i.e eth1, eth2 for their corresponding uplinks and bonding them to bond0 handle routing automatically? If I want to NAT client machines, do they use bond device's IP as a gateway? Does the bond0 device is the device that goes into iptables nat rules? Thanks

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• SMTP server problem

  - by ram

  Hi, Our requirement is to send weekly newsletters to our website customers. For which we wanted to have local hosted SMTP server in our office. We are not using SMTP server provided by website hosting provider, as we wanted to reduce the network traffic and avoid IP blocking due to bulk mails. We are sending newsletters on weekly basis from our local SMTP server. But due to some reasons, some emails are going to spam and some are not reaching to customers and sometimes there are bounce messages to follow bulk email guidelines (mainly from Gmail). Can you please suggest me, how to achieve my problem. I also wanted to know what type of technology generally Linkedin or banks uses to send notifications emails to all its customers. When they send bulk emails, they will always reach inbox with out any problem. I want the same solution to implement for my website. Please suggest me. Thank you very much in advance.

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• Using WDS to make a router act like a makeshift signal booster

  - by cornjuliox

  I've got a router that supports WDS, and I was wondering if I could use it to help extend the range of an existing wireless router? The PC I'm using right now is just barely within the signal range of a wireless router, and the signal is rather weak so I moved my wireless USB adapter away from the computer using a USB extension cord and used a pie tin + some packing tape + a stack of books and a tall wooden stand to make a sort of reflector dish. Sometime in the future I'd like other PCs to be able to connect wirelessly but with the way things are set up I can't move any farther from this spot or I lose the signal entirely. Can I use WDS to bridge the two networks together both to increase the range of the first network and allow computers connected to the 2nd router to share internet access?

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• Free, Linux-based rescue CD for Windows machines

  - by Adam Matan

  Hi, Too often, I'm being called to help a friend who screwed a Windows machine by some creative methods. Th usual remedy is backing up the hard drive contents and reinstalling. Right now, this is done by removing the defected hard drive to my machine. I figured out that using a rescue disk running some version of Linux might ease the process. I'm looking for: NTFS access Partition tools Large variety of drivers (Network, Hard drives, etc.) GUI and some rescue wizards a great plus. Any ideas? Adam

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• forcing upgrade or how to upgrade packages after update failed

  - by Orosjopie

  How do I continue upgrade or fix upgrade as upgrading in 13.04 to 13.10 failed. I'm currently running terminal in restore mode. I get the error unmet dependencies, but tried to install apt-get -f install, but get this error: unable to fetch some archives. using apt-get update also brings errors for example: failed to fetch http: archive.canonical.com/ubuntu/dists/quantal/release.gpg Could not resolve 'archive.canonical.com. Is it my internet connection? Its currently connected via a network cable and internet is on other computers. If internet on my ubuntu 13.10, how do I switch it on? or how can fix my upgrade problem that I can boot ubuntu normal, backup, then format and reload ubuntu 13.10 properly? I posted this problem that has also linked to this problem I mentioned: upgrading to ubuntu 13.10 failed/crashed. I did manager to install/upgrade some of the files and got ubuntu 13.10 to reboot, but not 100%, as it is slow and the unity desktop is not showing 100%. in trying some of the commands online, I get the error that the activity manager is not installed, when trying to install it, it conflicts with activity-log-manager-common. Please assist.

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• Creating svn repo programmatically from a webpage and sudo

  - by Adriano Varoli Piazza

  We want to automate the creation of the svn repos and trac environments for new projects. Basically, this would mean creating a web script that got some info (like env and repo name, etc) from the user and then executed sudo -u svn svnadmin create /var/svn/<projectname> trac-admin /var/trac/sites/<projectname> initenv [... All extra params...] For the second command, this is simple, as it already runs as the www-data user, so I wouldn't have to use sudo. But for the first command, I'd have to use sudo and add www-data to the sudoers file. I was wondering if this is a good idea, and how to do it in that case. Reading the manpage has left me with more doubts than certainties about this. This webserver would only be accessible from our internal network, by the way. The OS is Ubuntu Server 10.04.

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• What is the difference between apt-get and dpkg?

  - by William F. Hammond

  Both apt-get and dpkg can be used to install and remove packages. When to use which? Context: I'm in stuck in package limbo between 10.04.4 LTS and 12.04.1 LTS after an attempted upgrade via the package manager. For example, to fix things I wanted to remove "skype" so that things it depends on could be freed up. But "aptitude" (my normal package management tool) refused to remove it. The advice at http://administratosphere.wordpress.com/2011/11/02/rescuing-an-interrupted-ubuntu-upgrade/ seems helpful but not adequate to resolve my package conflicts. Also there's a strange thing where the grub menu seems not to be properly interpreted, but eventually I get the splash screen with "/ is not ready yet or not present. Continue to wait; or press S to skip or M to recover manually." Manual recovery puts me in a single user shell where I can easily remount / as rw and bring up the network. If I become myself, the command line seems quite robust, but, there seems to be no way to get X11 going.

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• Can't find netbooted for Kerrighed pxe boot with Ubuntu Lucid Server

  - by Pengin

  I'm following installation guides for pxe booting and kerrighed. I can't find the package nfsbooted for Ubuntu 10.04. Where did it go? Context: At work I have access to 8 mini-ITX PCs and am trying to build a cluster. My plans include trying Condor, GridGain, Hadoop, and recently Kerrighed has caught my eye. (I reaslise these are all for different kinds of things, I'm just evaluating). Ideally, I'd like to have all the nodes network boot from a single server, since that seems so much easier to manage, plus I can 'borrow' additional PCs for a while without touching their HD. I've been getting on great with Ubuntu Lucid Server (10.04), trying to follow the only guides I can find to get pxe booting (and ultimately kerrighed) to work. This guide is for Ubuntu 8.04 and this one is for Debian. They both refer to a package I can't seem to find, nfsbooted. Has this package been replaced? Am I doing something daft?

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• Windows 7 - Virtualbox host only adapter doesn't get an IP

  - by Craig

  When I create a new host only network adapter, it will not set the IP address I assign to it. After I save the IP address & netmask it looks like it works (I see the Windows 7 User Account Control verification box), but the IP address doesn't get stored on the adapter. I have tried adding/removing the adapter from within virtualbox and settings the values manually in the Windows aapter settings dialogue. I am using a Windows 7 host. Does anyone know why the settings don't get saved, or how to get more information? C:\Program Files\Oracle\VirtualBox>VBoxManage list hostonlyifs Name: VirtualBox Host-Only Ethernet Adapter GUID: 1721835e-e2c8-4f52-90fe-df7227ebe037 DHCP: Disabled IPAddress: 0.0.0.0 NetworkMask: 0.0.0.0 IPV6Address: IPV6NetworkMaskPrefixLength: 0 HardwareAddress: 00:00:00:00:00:00 MediumType: Unknown Status: Unknown VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter

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• Aircrack-ng, is it illegal?

  - by Jasen

  I just found out about this linux-based network toolset called aircrack-ng, and its pretty interesting, and I'm learning how to use it. But it just occured to me, that like a lot of linux programs, they're developed in foreign countries, with different laws. I did do a google search, and the only thing in regards to what i am asking that pops up is a question on another site. So, my question is, is it illegal in America, specifically Ohio, to use this program? I mean i know it has a legitimate purpose, but so does hemp. Also, sorry if this is the wrong place for this question, but I'm not exactly sure where it should go.

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• MaaS minimum requirements with juju-jitsu?

  - by Christopher Shen Mu Long

  I've browsed through so many different sites and found so much contradictory information. As I am getting tired of this and do belive this question affects many other users, so I would like to collect the "once and for all times" answer. Unfortunately, the documentation on MaaS and Juju is ... well, not the best, sorry to say that. What are the minimum system requirements for setting up a MaaS cluster, which is going to be orchestrated with juju-jitsu? Do they need to have the exact system specifications or can I just combine different hardware? What are the minimum requirements for the master machine? E.g. "You need at least 8GB of RAM, a dual core CPU with at least 3.0 GHz." How many machines to I need to deploy MaaS on? I've read six machines, nine machines, and so on. I clearly want to know: "You need one for the Master and e.g. five nodes." Do I need to attach as many NICs (network interface cards) to my master machine as there are nodes, or can I simply attach two NICs and a switch? One NIC for connecting to the internet, one for handling the MaaS tasks, connected to a switch, which connects my nodes to the master? Is Juju now ready for local deployment? The last time I experimented with juju and had to reboot my machine, the services orchestrated by juju were gone. This was an issue I also found on the official juju site. Unfortunately, as mentioned above, the documentation is not the best, so I could not find the necessary info on that again. So: Can I use juju on a local environment or will a reboot break my setup?

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• Who are the SOA experts? Specialization recognized by customers

  - by Jürgen Kress

  You are looking for the SOA experts to deliver an successful project - contact our Oracle SOA Specialized partners - you can recognize them by the logo, the plaques and in the solutions catalog: Plaques SOA Specialized We would like to offer you a nice SOA Specialization plaque  with your logo to proof your success. If you are a SOA Specialized partner and would like to request the plaque please send Brigitte an e-mail with the following information: Partner Name Partner logo (preferred eps file) Partner Status gold or platinum We recommend to mount the plaque at your office reception in addition you can use the SOA Specialization logos at your website Download Logo: Gold & Platinum Solutions Catalog Please make sure that your Oracle Partner Network administrator will add your achieved Specializations to the Oracle Solutions catalog We started to promote at our website www.oracle.com/soa the find a Specialized Partner who added their Service Oriented Architecture Specialization in the solutions catalog. For administration please visit manage solutions catalog within OPN For detailed tutorial and an faq please visit. http://tinyurl.com/Catalogorcl   For more information on SOA Specialization and special SOA please make sure that you read the SOA & Application Grid Specialization Guide and the SOA & Application Grid Specialization Checklist. Blog Twitter LinkedIn Mix Forum Wiki Website Technorati Tags: SOA Sepecialization,OPN,Oracle,SOA,Jürgen Kress,plaques,solutions catalog

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• IIS 7 with verisign certificate, invalid certificate returned

  - by bh213

  We have IIS7 on windows 2008 and we installed verisign certificate and bound it to https. Certificate seems fine. Chain: mysite.com - not expired VeriSign international server CA class 3 - not expired Verisign Class 3 Public primary certification Authority - not expired Yet when I use verisign online validation, I get that second certificate is expired. https://knowledge.verisign.com/support/ssl-certificates-support/index?page=content&id=AR1130# This is what it reports, mysite is reported to be ok: ---------------- --Issued To-- Organization: VeriSign Trust Network Organizational Unit: www.verisign.com/CPS Incorp.by Ref. LIABILITY LTD.(c)97 VeriSign Organizational Unit 2: VeriSign International Server CA - Class 3 Organizational Unit 3: VeriSign,, Inc. --Issued By-- Organization: VeriSign,, Inc. Organizational Unit: Class 3 Public Primary Certification Authority Country: US Validity Start: Wed Apr 16 17:00:00 PDT 1997 Validity End: Wed Jan 07 15:59:59 PST 2004 ---------------- Any ideas?

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• WiFi can't reconnect after suspend/hibernate on Ubuntu 12.04.1

  - by CyberOPS

  I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. When I updated to Ubuntu 12.04 I encrypted the home folder, so I wasn't able to suspend or hibernate anymore (disappointing :l). Because of this and another issue I had1, I chose to reinstall. Sometime after I reinstalled, I was reminded about reconnection issue because it wasn't working after I suspended. I tried to use the same fix as before but I couldn't get it to work. I've also tried a couple other different fixes I found around the web but they didn't work. Since I'm new to linux, I'm gonna have a tough time figuring this out by myself. So does anyone know how, or what I need to figure out how, to fix this? Info: Computer: HP Pavilion dv6t-6b00 CTO Quad Edition Entertainment Notebook PC Network Card: Intel® Centrino® Wireless-N 1000 OS: Ubuntu 12.04.1 (x64) dual booting with Windows 7 (x64) (Not using Wubi) Wireless Card Driver: Intel Wireless WiFi Link drivers for Linux (iwlwifi) 1 - ntfs-config caused colord to crash on startup, even after NTFS-Config was removed.

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• Securing credentials passed to web service

  - by Greg Smith

  I'm attempting to design a single sign on system for use in a distributed architecture. Specifically, I must provide a way for a client website (that is, a website on a different domain/server/network) to allow users to register accounts on my central system. So, when the user takes an action on a client website, and that action is deemed to require an account, the client will produce a page (on their site/domain) where the user can register for a new account by providing an email and password. The client must then send this information to a web service, which will register the account and return some session token type value. The client will need to hash the password before sending it across the wire, and the webservice will require https, but this doesn't feel like it's safe enough and I need some advice on how I can implement this in the most secure way possible. A few other bits of relevant information: Ideally we'd prefer not to share any code with the client We've considered just redirecting the user to a secure page on the same server as the webservice, but this is likely to be rejected for non-technical reasons. We almost certainaly need to salt the password before hashing and passing it over, but that requires the client to either a) generate the salt and communicate it to us, or b) come and ask us for the salt - both feel dirty. Any help or advice is most appreciated.

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