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• Round-up: Embedded Java posts and videos

  - by terrencebarr

  I’ve been collecting links to some interesting blog posts and videos related to embedded Java over the last couple of weeks. Passing  these on here: Freescale blog – The Embedded Beat: “Let’s make it real – Internet of Things” Simon Ritter’s blog: “Mind Reading with Raspberry Pi” NightHacking with Steve Chin and Terrence Barr: “Java in the Internet of Things” NightHacking with Steve Chin and Alderan Robotics: “The NAO Robot” Java Magazine: “Getting Started with Java SE for embedded devices on Raspberry Pi” OTN video interview: “Java at ARM TechCon” OPN Techtalk with MX Entertainment: “Using Java and MX’s GrinXML Framework to build Blu-ray Disc and media applications” Oracle PartnerNetwork Blog: “M2M Architecture: Machine to Machine – The Internet of Things – It’s all about the Data” YouTube Java Channel: “Understanding the JVM and Low Latency Applications” Cheers, – Terrence Filed under: Mobile & Embedded Tagged: blog, iot, Java, Java Embedded, Raspberry Pi, video

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• Round-up: Embedded Java posts and videos

  - by terrencebarr

  I’ve been collecting links to some interesting blog posts and videos related to embedded Java over the last couple of weeks. Passing  these on here: Freescale blog – The Embedded Beat: “Let’s make it real – Internet of Things” Simon Ritter’s blog: “Mind Reading with Raspberry Pi” NightHacking with Steve Chin and Terrence Barr: “Java in the Internet of Things” NightHacking with Steve Chin and Alderan Robotics: “The NAO Robot” Java Magazine: “Getting Started with Java SE for embedded devices on Raspberry Pi” OTN video interview: “Java at ARM TechCon” OPN Techtalk with MX Entertainment: “Using Java and MX’s GrinXML Framework to build Blu-ray Disc and media applications” Oracle PartnerNetwork Blog: “M2M Architecture: Machine to Machine – The Internet of Things – It’s all about the Data” YouTube Java Channel: “Understanding the JVM and Low Latency Applications” Cheers, – Terrence Filed under: Mobile & Embedded Tagged: blog, iot, Java, Java Embedded, Raspberry Pi, video

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• MIDI Over Networking on OSX: Lots of beachballing

  - by Yar

  I have 4 computers connected to a Wifi router (with no Internet uplink). Whenever we enter the Network interface for Audio/Midi preferences in ANY of the computers, the Mac beachballs and then finally finds its way. Occasionally, however, one of the computers fails to receive the MIDI information that was destined for it via the Network MIDI interface. Changing to all wired connections does NOT help. Adding Internet uplink DOES help and the problem is resolved. This makes no sense to me as the computers can access each other just fine with or without the Internet uplink. Any ideas? [NOTE: I'll update the question if people correct my terminology, or feel free to do that if you have the rights].

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• Setting up shared connection

  - by Calvin Froedge

  I have a network that is connected to the internet via a switch connected to a router. I have it setup like this so I can work on the new network without causing problems on the old. Anyway, I'm trying to enable internet connection sharing. Internet comes to server like this: Modem - Router - Switch - Ubuntu 11.10 (Eth0) I want to share the connection through Eth1 (Eth1 - Managed Switch - Clients). Here is my config for /etc/network/interfaces: I have a DHCP server running on Eth1. Here is my config: ddns-update-style none; option domain-name "myserver.local"; option domain-name-servers 192.168.1.2, 8.8.8.8; default-lease-time 600; max-lease-time 7200; authoritative; subnet 192.168.1.0 netmask 255.255.255.0 { interface eth1; range 192.168.1.3 192.168.1.254; option routers 192.168.1.1; option subnet-mask 255.255.255.0; option broadcast-address 192.168.1.255; } Here is /etc/network/interfaces: # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp #Used for internal network auto eth1 iface eth1 inet static address 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255 network 192.168.1.0 Here is /etc/hosts: 127.0.0.1 localhost 127.0.1.1 myserver.isp.com server 192.168.1.2 server.myserver.local server myserver.local In /etc/sysctl.conf, I've set the following: net.ipv4.ip_forward=1 Finally, in /etc/rc.local, I've set the following: /sbin/iptables -P FORWARD ACCEPT /sbin/iptables --table nat -A POSTROUTING -o eth1 -j MASQUERADE When I ping 8.8.8.8 (google's DNS) from a client that is authenticated with my DHCP server (they have been assigned a local ip, like 192.168.1.10), I get a timeout. How can I debug this further to figure out where my problem is?

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• Help me a routing server on Windows XP

  - by Lu Lu

  I am developing client/server applications and need to test them on Internet environment. However, I only have one PC without connecting the public internet, so I have a plan to simulate a virtual internet environment on my PC. I think I will install the virtual machines for my purpose, but I can install only one machine because of my slowly PC. At the moment, my PC has 2 machines: the host machine (use Windows XP) & the virtual machine (use Windows Server 2003 Ent). Each machine will have 2 network adapter (host-only & internal), and in 2 network adapters, the internal adapter is private on each machine, and host-only adapters are connected together. With Windows 2003, routing server is ok, but I wonder on Windows XP, are there any routing server product? Please help me. Thanks.

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• Making a home group

  - by Siddharth Warrier

  I have two computers in my house they are laptop and desktop and I use internet which is of wired connection and it has a modem. The modem has 1 LAN port and 1 USB port. So what I did is that I connected the desktop to the LAN which had Windows 7 Home Premium OS and Laptop to the USB which had Windows 7 Home Basic. As home group can be made with windows 7 home premium and above versions I made it via desktop. The home group was established and the data can be exchanged.But one problem I was able to access internet in desktop but not in laptop. So I tried to share internet but I am not able to do so..... So anyone there to help me ???????

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• Security Risks of Unsigned ClickOnce Manifests

  - by Tom Tom

  Using signed manifests in ClickOnce deployments, it is not possible to modify files after the deployment package has been published - installation will fail as hash information in the manifest won't match up with the modified files. I recently stumbled upon a situation where this was problematic - customers need to be able to set things like connection strings in app.config before deploying the software to their users. I got round the problem by un-checking the option to "Sign the ClickOnce manifests" in VS2010 and explicitly excluding the app.config file from the list of files to have hashes generated during the publish process. From a related page on MSDN "Unsigned manifests can simplify development and testing of your application. However, unsigned manifests introduce substantial security risks in a production environment. Only consider using unsigned manifests if your ClickOnce application runs on computers within an intranet that is completely isolated from the internet or other sources of malicious code." In my situation, this isn't an immediate problem - the deployment won't be internet-facing. However, I'm curious to learn what the "substantial security risks" of what I've done would be if it was internet-facing (or if things changed and it needed to be in the future). Thanks in advance!

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• How to route traffic from a subnet 10.0.0.x to a network 200.208.88.17

  - by Guilherme Longo

  I have the following configuration Router : IP: 200.208.88.17 (Internet) MASK: 255.255.255.40 Server 2003 : IP: 10.0.0.1 (with dhcp server ativated) dhcp scope: 10.0.0.11 - 10.0.0.254 MASK: 255.255.255.0 clients : IP: 10.0.0.11 - 10.0.0.254 MASK: 255.255.255.0 At this point I have all computer set-up in one switch. All clients are receiving ip´s from the dhcp server. I need to enable the internet in every client. I am not sure how to route the traffic from the clients to the router that is providing internet access. Could you please point me to the right direction?

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• How can I join two simple home networks together using an ethernet cable?

  - by Ilia Jerebtsov

  I want to join two different home networks together like so: PC A1 PC A2 PC B1 PC B2 \ / \ / Gateway A <----- ethr. cable -----> Gateway B | | ADSL modem A ADSL modem B Both networks are of the basic residential type with identical configuration, with all PCs running Vista/7. The point is to temporarily join two apartments in a building for gaming and file sharing, and the holy grail would be: PCs on network A can access PCs on network B and vice-versa (file shares and gaming). Each network uses its own internet connection. Data between networks shouldn't take a trip through the internet (broadband upload speeds are severely capped) A network's internet access should continue working if the joining cable is disconnected with minimal configuration changes. How closely can this be achieved?

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• TP-LINK-8901 modem does not connect automatically; only works in bridged mode [closed]

  - by Arash

  Possible Duplicate: Cannot Connect To Internet In Automatic (pppoe) Mode Of Modem My TP-LINK-8901 modem does not connect to internet with "always on" (automatic) connection. I have to put it in bridge mode and make a connection in Windows to connect to internet. Also, there is no configuration problem. What I did: Reset modem Update firmware Is there any way to solve the problem myself, e.g. through hardware or software? I can't have it repaired because the warranty already expired.

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• Dual LAN Printing

  - by Christopher

  I want to use Ubuntu 10.10 Server in a classroom, a computer lab whose bandwidth is provided by a local cable ISP. That's no problem, though the school network has an IP printer that I want to use. I cannot reach the printer through the cable Internet. But, I have two network cards. How is it possible to use both networks at once? eth0 (static 192.168.1.254) is plugged into a four-port router, 192.168.1.1. On the public side of the four-port router is Internet provided by the cable company. I also have the classroom workstations plugged into a switch. The switch is plugged into the four-port router. The whole classroom is wired into the cable Internet. The other NIC, eth1, could it be plugged into an Ethernet jack in the wall? It uses the school network, and I might receive by DHCP an IP address like 10.140.10.100, with the printer on maybe 10.120.50.10. I was thinking about installing the printer on the server so that it could be shared with the workstations. But how does this work? Can I just plug eth1 into the school network and access both LANs? Thanks for any insight, Chris

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• wireless network with cable modem and access point

  - by hayri

  I have a Scientific Atlanta EPC2203 cable modem and a TP-Link TL-WA500G access point. When I connect my computer directly to modem with a CAT5e cable I have internet connection on my laptop (when i type ipconfig i see my external ip there, provided by isp). So I decided to have wireless network in the flat, allowing other devices to connect as well. I bought this wireless ap (TL-WA500G) configured Wireless security stuff, and connected it to my modem. With that configuration (by default AP has static ip of 192.168.1.254) only my computer can connect to internet over wifi, but not any other device. When I set the IP of AP to Dynamic IP (DHCP) it is the same. How should I change my configuration to enable all wifi devices to connect to internet?

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• Can TP-Link router make phone calls?

  - by Umair Ashraf

  I have a TP-Link router with DSL service provided by a local company which serves it over the landline phone. My landline cord is plugged into an ethernet router which is then plugged into TP-Link wireless router. I can access internet with this wireless router all over my home with all computers. Landline Cord [into] Ethernet Router [into] TP-Link Wireless Router [air] Computers I would add that landline cord is also into a phone device which I use to make calls and that's not cordless. Now I am accessing internet via WiFi on my laptop and want to ask if is this possible to make landline calls via this same computer I am surfing internet through? What I am asking it to a dial-up via TP-Link router that goes through landline. You see the landline cord is the actual data gateway and is also used to make calls. So it can simultaneously send Data and Voice over the same wire.

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• LinkSys router suddenly cannot get an IP address

  - by user43208

  I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting last week, I suddenly lost my internet connection. At first I thought something was wrong with my ISP. However, when I tried connecting the cable directly to my laptop, I found out that there was no problem with the internet connection after all. It appears that it is only my router that cannot get IP address. I have already tried cloning my MAC address and reconfiguring my router using the setup CD, but nothing worked. What could be the problem here? Thank you. Regards, Erwin

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• Thank You For Visiting Us At Oracle OpenWorld And JavaOne

  - by Brandye Barrington

  Thanks to everyone who visited us at the Oracle OpenWorld and JavaOne conferences last week. We always enjoy putting faces with names and meeting those of you who are certified or are interested in Certification. Personally, I spent my week on sunny Taylor street at the Java Certification Zone in Taylor Street Cafe.  I talked to over 100 people last week about certification and handed out over 65 ribbons. The Oracle Certification Lounge at OpenWorld, at Moscone South enjoyed more than 200 visitors over the week. Both locations offered scheduled speakers and available experts, in addition to answers to all of your certification questions and account help when needed. We look forward to this opportunity every year to connect with you face to face. If you didn't make it out this year, we hope to see you next year - perhaps we will be so lucky as to enjoy another unseasonably warm week in San Francisco! Stay tuned to our blog for some customer success stories that we were able to record last week.

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• La France voit l'iPad débarquer, la tablette d'Apple devrait sauver la presse payante, d'après la pr

  Mise à jour du 28/05/10 La France voit débarquer l'iPad La tablette d'Apple devrait sauver la presse payante, d'après la presse payante : vraiment ? Vous ne pourrez pas y échapper. Toute la presse en parle. Et va continuer à en parler. Nous ne nous attarderons donc pas sur la longue file d'attente des impatients au Carrousel du Louvre - ou sur l'AppStore de Montpellier (le seul de province) pris d'assaut par les fans - ni sur le dispositif marketing d'Apple avec ses « Concierges », son service de sécurité qui filtre les clients un par un et ses serveurs qui proposent le café au petit matin à ceux qui ont campé pour être les pre...

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• Recovering a lost website with no backup?

  - by Jeff Atwood

  Unfortunately, our hosting provider experienced 100% data loss, so I've lost all content for two hosted blog websites: http://blog.stackoverflow.com http://www.codinghorror.com (Yes, yes, I absolutely should have done complete offsite backups. Unfortunately, all my backups were on the server itself. So save the lecture; you're 100% absolutely right, but that doesn't help me at the moment. Let's stay focused on the question here!) I am beginning the slow, painful process of recovering the website from web crawler caches. There are a few automated tools for recovering a website from internet web spider (Yahoo, Bing, Google, etc.) caches, like Warrick, but I had some bad results using this: My IP address was quickly banned from Google for using it I get lots of 500 and 503 errors and "waiting 5 minutes…" Ultimately, I can recover the text content faster by hand I've had much better luck by using a list of all blog posts, clicking through to the Google cache and saving each individual file as HTML. While there are a lot of blog posts, there aren't that many, and I figure I deserve some self-flagellation for not having a better backup strategy. Anyway, the important thing is that I've had good luck getting the blog post text this way, and I am definitely able to get the text of the web pages out of the Internet caches. Based on what I've done so far, I am confident I can recover all the lost blog post text and comments. However, the images that go with each blog post are proving…more difficult. Any general tips for recovering website pages from Internet caches, and in particular, places to recover archived images from website pages? (And, again, please, no backup lectures. You're totally, completely, utterly right! But being right isn't solving my immediate problem… Unless you have a time machine…)

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• How Can I Disable CRL Checks For A Windows 2008 App Using WinHTTP?

  - by Mike B

  I've got a Windows 2008 server with an app that uses WinHTTP for SSL sessions. The server is isolated from the internet but still tries to connect to CRL distribution points, which leads to some timeouts. Since the server has no access to the internet whatsoever, I'd like to disable CRL checks. I had a similar issue on a Windows 2003 server and resolved it by adjusting the following registry keys: HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Http/Parameters/SslBindiongInfo/0.0.0.0:443/DefaultSslCertCheckMode (DWORD=1) HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Rasman/PPP/EAP/13/NoRevocationCheck (DWORD = 1) HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Rasman/PPP/EAP/13/NoRootRevocationCheck (DWORD = 1) That doesn't seem to be working in 2008. I've also tried disabling the CRL check from IE under Tools Internet Options Advanced. Is there anything else I can try here?

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• Apple iOS Apps and caching at the edge proxy

  - by Matthew Iselin

  Our network contains a growing number of iOS devices, all of which with very similar configurations. All Internet access is via a transparent proxy. We've found that iOS updates and some free apps cache fine on the proxy, but any paid apps fail to cache properly (as they seem to be encrypted to the Apple ID (?)). I'm just wondering if there's any way forward with this where we could cache the paid apps so that they are purchased n times, but downloaded from the proxy cache instead of from the Internet each time. Bandwidth caps aside, the download direct from the Internet slows everything down for everyone, regardless of fairness queueing and related 'fixes'. I know this is quite unlikely, but I figured there's nothing to lose and everything to gain before I look into other solutions (eg, QoS).

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• WIFI: iPhone/iPad getting much slower bandwidth than laptop

  - by Sam

  I just got cable internet installed (Comcast). It claims that my down speed should be 25mbit. Over wifi, I get close to that on my laptop, but only about 8 on average with my iPhone/iPad. I'm using testmy.net in the browser on all devices. I have an ARRIS / Motorola SurfBoard SB6141 DOCSIS 3.0 Cable Modem and a Medialink Wireless N Broadband Router. I read somewhere that disabling WMM and the firewall on the router would help (is this even a safe idea?). I've tried both, and neither seem to make much of a difference, if any at all (sidebar: I've noticed that my download speeds vary wildly with cable internet... on my laptop, I'll get 12 down, then 22 five minutes later. Is this typical for cable internet?).

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• Wireless Network Connection gets dropped at times under Windows 7

  - by n179911

  I have running Windows 7 on my hp laptop with 802.11n wifi adapter. Some times, I lost wireless internet connection. Under the 'Wireless Connection' when I click the notification area, it said 'my home network is 'connected'... But in the header 'currently Connected to' it said 'no internet access' instead of 'internet access' I can 'fix' my problem by going to the 'wireless connection' my home network, click 'disconnect' and then click 'connect'. And when it comes back up, it gets connected again. any idea how can i fix this problem? Thank you.

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• How to use multiple dns?

  - by Enrichman

  When I connect at work the net is going to assign me a dns that is working fine. After that when I connect to VPN I'm going to receive a different dns. With this one I can reach the server of the vpn owner but I'm not able to go to the internet. BUT if I switch the dns with the old ones I'm able to surf again (still connected to the vpn, but I cannot surf their server). Recap: DNS1) MyPC - CompanyProxy - Internet DNS2) MyPc - CompanyProxy - VPN - NoInternet (can Ping vpn servers) DNS1) MyPC - CompanyProxy - VPN - Internet (cannot ping vpn servers) Weirdest thing: I'm able to do a nslookup from anywhere, but ping is going to fail. Is possible to use both DNS? Or setup a dns just on the browser? I'm quite lost..

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• How can I fix my Virtual PC 2007 network configuration

  - by DanJ

  Hi, I have installed Windows Virtual PC 2007 on my Windows 2003 R2 Server. I have installed a virtual Windows XP. I have configured the virtual PC to use Shared Networking (NAT) I have disabled the firewall on the virtual windows XP The problem: I am unable to PING from Windows 2003 (the host) to the Windows XP (virtual) I do have normal traffic from the virtual to the internet Could this problem be related to routing? How I can I fix this network configuration to allow for the following traffic: 1. From Virtual to Internet 2. From Host to Virtual 3. If possible, from Internet to Virtual on pre-defined ports (port forwarding?) Thanks

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• Virus - Isn' t there any online solution ?

  - by Sarang

  In our daily life, we come across various Viruses. In this internet world, we do have lots of type of viruses come to visit us ! A programmer can create a Virus using programming & it can be put on internet. It flows across the world & harm all the system. Don't do we have a same way to run an Anti-virus that flows across the internet & can protect the network from being affected by Viruses ? Please give any Idea...

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• Linux route add between static LAN and Wifi Gateway

  - by Hamza

  I have two local machines connected to each other via wired ethernet and one of those machines is also connected to a wifi network which provides internet access. A pseudo-graphical representation of the topology is as follows: (PC2)----------(PC1)---------(Wifi Gateway) 192.168.2.x 10.0.0.x The configuration on PC2 is: iface eth0 inet static address 192.168.2.2 network 192.168.2.0 netmask 255.255.255.0 gateway 192.168.2.1 ...and the configuration on PC1 is: iface eth0 inet static address 192.168.2.1 network 192.168.2.0 netmask 255.255.255.0 gateway 192.168.2.1 On PC1, I've added a default route for wlan0 as I couldn't access the internet otherwise: route add default gw 10.0.0.1 wlan0 And also tried setting the gateway for the 192.168.2.x network using: route add -net 192.168.2.0 netmask 255.255.255.0 gw 10.0.0.1 But I still can't access internet from PC2. Edit I don't have access to the wifi gateway.

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