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• There's IP but can't reach gateway

  - by icky

  I have just installed ubuntu 12.04 on my new laptop, and brought it back to home, but I found the wireless network does not work. Strangely, it has the correct ip, but can't connect to the gateway. ifconfig gives ip 192.168.64.36, with broadcast 192.168.79.255 and mask 255.255.240.0, this are all correct, the gateway is at 192.168.64.1 cat /etc/resolv.conf nameserver 192.168.64.1 nameserver 127.0.0.1 which i think it's also right. but when I ping 192.168.64.1, all packages are lost. Please help me with this, I really do not know what happened to my network settings. Huckle, Thank you for your reply ifconfig wlan0 Link encap:Ethernet Hwaddr 88:f9:af:2a:ca:1b inet addr:192.168.64.36 Bcast:192.168.79.255 Mask:255.255.240.0 inet6 addr: fe80::8a9f:faff:fea2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27 errors:0 dropped:0 overruns:0 frame:0 TX packets:376 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3950 TX byetes:60288 iwconfig wlan0 IEEE 802.11bgn ESSID:"Chiono" Mode:Managed Frequency:2.417 GHz Access Point: 82:54:99:94:6D:43 Bit Rate=13.5 Mb/s Tx-Power=13 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on Link Quality=70/70 Signal Level=-32 dBm Rx invalid nwid:0 Rx invalid crypt:0 RX invalid frag:0 Tx excessive retries: 9 Invalid misc:10 Missed beacon:0 route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 192.168.64.1 0.0.0.0 UG 0 0 0 wlan0 link-local * 255.255.0.0 U 1000 0 0 wlan0 192.168.64.0 * 255.255.240.0 U 2 0 0 0 wlan0 Thank you very much

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• How to setup an iTunes library to use between two Macs?

  - by stead1984

  As you can tell this is no where near work related. I have an iMac G5 where my itunes is currently hosted, I have also just got a new MacBook Pro. What I want to be able to do is sync my itunes library from my iMac to my MacBook Pro, that way it can be accessible away from my home network, then if I make any changes to the itunes library (like change a track name) it will sync these changes back once I connect back to the home network. My current itunes contains music, videos, podcasts, playlists and iPhone apps, I would also like iTunes to track play counts collectively between the iMac and the MacBook Pro.

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• Blogging locally and globally–my experience

  - by DigiMortal

  In Baltic MVP Summit 2011 there was discussion about having two blogs - one for local and another for global audience – and how to publish once written information in these blogs. There are many ways how to optimize your blogging activities if you have more than one audience and here you can find my experiences, best practices and advices about this topic. My two blogs I have to working blogs: this one here technology and programming blog for local market My local blog is almost five years old and it makes it one of the oldest company blogs in Estonia. It is still active and I write there as much as I have time for it. This blog here is active since September 2007, so it is about 3.5 years old right now. Both of these blogs are  my major hits in my MVP carrier and they have very good web statistics too. My local blog My local blog is about programming, web and technology. It has way wider target audience then this blog here has. By example, in my local blog I blog also about local events, cool new concept phones, different webs providing some interesting services etc. But local guys can find there also my postings about how to solve one or another programming problem and postings about Microsoft technologies I am playing with. This far my local blog has a lot of readers for such a small country that Estonia is. This blog has made me a lot of cool contacts and I have had there a lot of interesting discussions about different technical topics. Why I started this blog? Living in small country is different than living in big country. In small country you have less people and therefore smaller audience so you have to target more than one technical topic to find enough readers. In a same time you are still interested in your main topics and you want to reach to more people who are sharing same interests with you. Practically one day y will grow out from local market and you go global. This is how this blog was born. Was it worth to create, promote and mess with it? Every second I have put on my time to this blog has been worth of it. Thanks to this blog I have found new good friends and without them I think it is more boring to work on different problems and solutions. Defining target audiences One thing you should always do when having more than one blog is defining target audiences. If you are just technomaniac interested in sharing your stuff and make some new friends and have something to write to your MVP nomination form then you don’t have to go through complex targeting process. You can do it simple way and same effectively. Here is how I defined target audiences to my blogs: local blog – reader of my local blog is IT professional, software developer, technology innovator or just some guy who is interested in technology,   this blog – reader of this blog is experienced professional software developer who works on Microsoft technologies or software developer who is open minded and open to new technologies and interesting solutions to development problems. You can see how local blog – due to small market with less people – has wider definition for audience while this blog is heavily targeted to Microsoft technologies and specially to software development. On practical side these decisions are also made well I think because it is very hard to build up popular common IT blog. On global level it is better to target some specific niche and find readers who are professionals on your favorite topics. Thanks to this blog I have found new friends who are professional developers and I am very happy about all the discussions I have had with them. Publishing content to different blogs My local blog and this blog have some overlapping topics like .NET, databases and SEO. Due to this overlapping there is question: when I write posting to my local blog then should I have to publish same thing in my global blog? And if I write something to my global blog then should I publish same thing also in my local blog? Well, it really depends on the definition of your target audiences. If they match then of course it is good idea to translate you post and publish it also to another blog. But if you have different audiences then you may need to modify your posting before publishing it. The questions you have to answer are: is target audience interested in this topic? is target audience expecting more specific and deeper handling of this topic or are they expecting more general handling of topic? is the problem you are discussing actual for target audience or not? You have to answer these questions and after that make your decision. If you need to modify your original posting then take some time and do it. Provide quality to all your readers because they will respect you if you respect them. Cross-posting and referencing It is tempting to save time that preparing some blog post takes and if you have are done with posting in one blog it may seem like good idea to make short posting to another blog and add reference to first one where topic is discussed longer. Well, don’t do it – all your readers expect good quality content from you and jumping from one blog post to another is disturbing for them. Of course, there is problem with differences between target audiences. You may have wider target audience and some people may be interested in more specific handling of topic. In this case feel free to refer your blog you are writing in english. This is not working very well in opposite direction because almost all my global blog readers understand english but not estonian. By example, estonian language is complex one and online translating tools make very poor translations from estonian language. This is why I don’t even plan to publish postings here that refer to my local blog for more information. I am keeping these two blogs as two different worlds and if there is posting that fits well to both blogs I will write my posting to one blog and then answer previous three questions before posting same thing to another blog. Conclusion Growing out of your local market is not anything mysterious if you are living in small country. As it is harder to find people there who are interested in same topics with you then sooner or later you will start finding these new contacts from global audience. Global audience is bigger and to be visible there you must provide high quality content to your audience. It is something you will learn over time and you will learn every day something new when you are posting to your global blog. You may ask: if global blog is much more complex thing to do then is it worth to do at all? My answer is: yes, do it for sure. It is not easy thing to do when you start but if you work on your global blog and improve it over time you will get over all obstacles pretty soon. Just don’t forget one thing – content is king and your readers expect high quality from you.

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• Debian: Firefox or Iceweasel default printer for POS station

  - by Bubnoff

  Context Using Debian 6.04 "Squeeze" as POS station. There are two printers installed: Network printer and a receipt printer It absolutely must be able to print by default to the receipt printer on a certain website though the system default is a network printer. In Debian ...it doesn't. Problem I've set up XP, 7, Ubuntu and even Mac OSX this way, so I'm no stranger to setting Firefox up this way ...same Iceweasel/Firefox settings ...complete fail. Always uses system default no matter what the settings, or, which printer you print from. To get this to work on other systems you do this: Print a page in Firefox using desired printer. Ensure print.save_settings is true. Firefox remembers last printer used Set print.always_print_silent = true The end. This works on every OS I've set up ....except Firefox and Iceweasel in Debian. My only recourse seems to be to set the receipt printer as default or go back to bloaty Ubuntu/Mint ...etc.

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• Can a device (WAP or switch) be configured as an 802.1x supplicant?

  - by Allan Ross

  We are looking at implementing 802.1x on a wired/wireless network. What I am looking for is a device that can act as a supplicant and once authenticated on the network, is able to pass traffic from any downstream connected device. The point of doing this would be to allow a properly pre-configured device to be provided to a client user who could then connect any device on the downstream side of the device. We will be able to manage the aggregate traffic on the device without concern for what is connected on the far side. Am I dreaming; does every device out there support this and I just don't know it or is reality fall somewhere in the middle?

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• Setting up a SQL server outside the domain

  - by user12391

  Hi, im very new to this. I've set up an account "SQLBOX" thats on the a network, but not connected to the domain. I have installed an instance of SQL Server 2008 and am trying to connect to it from another machine on the network but am getting "Cannot connect to "SQLBOX"". From the "SQLBOX" i can connect to sqlservers on the domain, but not vice-versa. Any help would be greatly appreciated. Sorry if the description isn't great. EDIT I can ping the box from a machine on the domain

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• how to set static IP address in opensolaris

  - by pm100

  in closed solaris i knew how to do this. Edit /etc/inet/ipnodes, change /etc/defaultrouter, reboot in opensolaris there is not defaultrouter file. first thing I tried was System-admin-network switch to manual enter static address and netmask and gateway. press 'activate' "this interface cannot be activated". No error messages given. Close widget, open again. Now hangs for a minute and then closes try edit /etc/inet/ipnodes, reboot eth card not up. Network widget hangs then closes Works perfectly on DHCP

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• Randomly generate directed graph on a grid

  - by Talon876

  I am trying to randomly generate a directed graph for the purpose of making a puzzle game similar to the ice sliding puzzles from Pokemon. This is essentially what I want to be able to randomly generate: http://bulbanews.bulbagarden.net/wiki/Crunching_the_numbers:_Graph_theory. I need to be able to limit the size of the graph in an x and y dimension. In the example given in the link, it would be restricted to an 8x4 grid. The problem I am running into is not randomly generating the graph, but randomly generating a graph, which I can properly map out in a 2d space, since I need something (like a rock) on the opposite side of a node, to make it visually make sense when you stop sliding. The problem with this is that sometimes the rock ends up in the path between two other nodes or possibly on another node itself, which causes the entire graph to become broken. After discussing the problem with a few people I know, we came to a couple of conclusions that may lead to a solution. Including the obstacles in the grid as part of the graph when constructing it. Start out with a fully filled grid and just draw a random path and delete out blocks that will make that path work. The problem then becomes figuring out which ones to delete to avoid introducing an additional, shorter path. We were also thinking a dynamic programming algorithm may be beneficial, though none of us are too skilled with creating dynamic programming algorithms from nothing. Any ideas or references about what this problem is officially called (if it's an official graph problem) would be most helpful. Here are some examples of what I have accomplished so far by just randomly placing blocks and generating the navigation graph from the chosen start/finish. The idea (as described in the previous link) is you start at the green S and want to get to the green F. You do this by moving up/down/left/right and you continue moving in the direction chosen until you hit a wall. In these pictures, grey is a wall, white is the floor, and the purple line is the minimum length from start to finish, and the black lines and grey dots represented possible paths. Here are some bad examples of randomly generated graphs: http://i.stack.imgur.com/9uaM6.png Here are some good examples of randomly generated (or hand tweaked) graphs: i.stack.imgur.com/uUGeL.png (can't post another link, sorry) I've also seemed to notice the more challenging ones when actually playing this as a puzzle are ones which have lots of high degree nodes along the minimum path.

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• C# Dev - I've tried Lisps, but I don't get it.

  - by Jonathan Mitchem

  After a few months of learning about and playing with lisps, both CL and a bit of Clojure, I'm still not seeing a compelling reason to write anything in it instead of C#. I would really like some compelling reasons, or for someone to point out that I'm missing something really big. The strengths of a Lisp (per my research): Compact, expressive notation - More so than C#, yes... but I seem to be able to express those ideas in C# too. Implicit support for functional programming - C# with LINQ extension methods: mapcar = .Select( lambda ) mapcan = .Select( lambda ).Aggregate( (a,b) = a.Union(b) ) car/first = .First() cdr/rest = .Skip(1) .... etc. Lambda and higher-order function support - C# has this, and the syntax is arguably simpler: "(lambda (x) ( body ))" versus "x = ( body )" "#(" with "%", "%1", "%2" is nice in Clojure Method dispatch separated from the objects - C# has this through extension methods Multimethod dispatch - C# does not have this natively, but I could implement it as a function call in a few hours Code is Data (and Macros) - Maybe I haven't "gotten" macros, but I haven't seen a single example where the idea of a macro couldn't be implemented as a function; it doesn't change the "language", but I'm not sure that's a strength DSLs - Can only do it through function composition... but it works Untyped "exploratory" programming - for structs/classes, C#'s autoproperties and "object" work quite well, and you can easily escalate into stronger typing as you go along Runs on non-Windows hardware - Yeah, so? Outside of college, I've only known one person who doesn't run Windows at home, or at least a VM of Windows on *nix/Mac. (Then again, maybe this is more important than I thought and I've just been brainwashed...) The REPL for bottom-up design - Ok, I admit this is really really nice, and I miss it in C#. Things I'm missing in a Lisp (due to a mix of C#, .NET, Visual Studio, Resharper): Namespaces. Even with static methods, I like to tie them to a "class" to categorize their context (Clojure seems to have this, CL doesn't seem to.) Great compile and design-time support the type system allows me to determine "correctness" of the datastructures I pass around anything misspelled is underlined realtime; I don't have to wait until runtime to know code improvements (such as using an FP approach instead of an imperative one) are autosuggested GUI development tools: WinForms and WPF (I know Clojure has access to the Java GUI libraries, but they're entirely foreign to me.) GUI Debugging tools: breakpoints, step-in, step-over, value inspectors (text, xml, custom), watches, debug-by-thread, conditional breakpoints, call-stack window with the ability to jump to the code at any level in the stack (To be fair, my stint with Emacs+Slime seemed to provide some of this, but I'm partial to the VS GUI-driven approach) I really like the hype surrounding Lisps and I gave it a chance. But is there anything I can do in a Lisp that I can't do as well in C#? It might be a bit more verbose in C#, but I also have autocomplete. What am I missing? Why should I use Clojure/CL?

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• Characteristics and Common Usage Scenarios of SSIS Variables

  SQL Server Integration Services' primary purpose is to serve as a database development platform. As such, it is subject to standard best practices of software programming, which among other recommendations, advocate reusability. Realizing this objective in SSIS frequently involves the use of variables. Their characteristics and most common usage scenarios will be the primary subject of our presentation.

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• NT4 server generate too much weird DNS queries, How can i see the source PID?

  - by Hanan N.

  I have a NT4 server that in the last two weeks started to generate too many weird DNS queries to the DNS server is set to use. I have got warnings from the IPS system that it has blocked the responses from the DNS server back to the NT4 server. The queries it generate doesn't relate to any computer in the network, it is like 120624100088.xxxxxxx.net where xxx is the internal network, the numbers are just random at each query. I have done some research on how to get the PID that is generating the queries, and i found that only Process Monitor could give me that information, but since it is NT4 system Process Monitor doesn't work on it. It is a production server and i am just can't stop services as i want. I would like to get your advice on how can i get the PID that is generating these queries? Thanks.

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• Windows 2003 - logging off the Administrator account makes web applications inaccessible

  - by Saravana

  Consider a web application installed on a Windows Server 2003 SP2 machine with the admin account. The application is accessible in the server as well as in the network when at least one session of the admin account is logged in. If there are no active sessions of the admin account, the web application is not accessible via the network, nor accessible locally when logged in with another user account. What would cause the web application to be inaccessible there's no Administrator session? Please suggest anything that might help find the solution.

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• Can't login to SQL Server after moving machine to different office/domain

  - by Dan

  Our company has just been bought and the over the weekend I have brought up the last few machines to plug into their network (they are under a different Windows Domain). The last machine is our Vault system and the SQL Server was using Windows Authentication. I have plugged it into their network and its working fine, but i cannot connect to SQL Server with Management Studio and, I fear, no backup jobs will also be working. When I try to login under Windows Auth, it has the user name of "NEWDOMAIN\Administrator" (greyed out) and then presents a "login failed" message with error code "18456". Can anyone help me with this, or will I just have to reinstall SQL Server, Vault and restore the backup I took before the move?

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• Shift career path [on hold]

  - by Rnet

  I have been programming in web services and applications in java, python for about 6 years. Over the past two years I have been gaining a steady interest in networking and I find it very intriguing but due to non existent experience in that field I cannot pursue a serious career in that path. At this point in my career would it be wise to make the shift? What would you do/work on/study(masters?) to make a successful transition?

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• "Tout ce que vous avez toujours voulu savoir sur les applications Web hors ligne HTML5", vidéo de la conférence de P. Lubbers

  Le lundi 08 novembre 2010, Peter Lubbers, l'auteur de Pro HTML 5 Programming et expert international HTML, a animé une conférence intitulée "Tout ce que vous avez toujours voulu savoir sur les applications Web Hors Ligne HTML" organisé par Zenika. Nous vous proposons, en exclusivité, la vidéo complète (avec les dialogues dans la langues de l'animateur : anglais) de cette conférence. Bon visionnage !!!

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• A "tinkered" PC can ping by IP, not by hostname. How to fix?

  - by aitchnyu

  Like this: root@tis-server:~# ping www.google.com ping: unknown host www.google.com root@tis-server:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_req=1 ttl=55 time=50.3 ms 64 bytes from 8.8.8.8: icmp_req=2 ttl=55 time=65.4 ms It was tinkered by somebody else and I (and him!) cant trace his actions. The graphical connection manager also refuses to work thanks to the tinkering. It also makes route add default gw 192.168.0.1 necessary for each reboot to atleast ping by IP. How do I fix this? It is Ubuntu 11.10 As requested: Output of ifconfig: eth0 Link encap:Ethernet HWaddr 48:5b:39:ae:21:98 inet addr:192.168.0.100 Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::4a5b:39ff:feae:2198/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13194 errors:0 dropped:0 overruns:0 frame:0 TX packets:5156 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1420596 (1.4 MB) TX bytes:827295 (827.2 KB) Interrupt:42 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4817 errors:0 dropped:0 overruns:0 frame:0 TX packets:4817 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:377732 (377.7 KB) TX bytes:377732 (377.7 KB) Output of resolv.conf: Output of /etc/network/interfaces: GNU nano 2.2.6 File: /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.100 netmask 255.255.255.0

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• FTP Access Denied when uploading to server

  - by Albert

  Ok, here's the story. I have a server running FTP 'out there' I can connect to it using the admin account, browse files, download files. When I try to upload files, I get 550 Access Denied. I have tried through FileZilla and command line. I have windows firewall turned off (on my machine) I can UPLOAD files from another machine (using the same admin account) on our local network (that means, same public IP) what is the problem? I am running Windows 7, Build 7100 and the other machine on the network is running XP SP3 The thing that gets me though, is that this worked for the last probably 4 months, without a problem, I get back in the office after a weekend today and it won't work...

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• Coldfusion server VERY slow page loads

  - by Kevin

  I inherited a windows server 2003 coldfusion 7 server a few weeks ago. Today a network cable was unplugged by accident from the server. On plugging it back in, pages were NOT loading at all. Rather, we were receiving a generic coldfusion error page. After restarting IIS several times and coldfusion even more than that, we finally got pages to start loading. However, the loading is extremely slow (30+ seconds) on pages that used to load instantly. Loading through the local network (IE localhost/cfide/administrator) does nothing to help the load speed. I am not familiar with IIS or Coldfusion (We're in the process of migrating this to Linux/PHP), so this is all new territory to me. I'm hoping someone may have experienced this issue in the past and can help me solve it. I'm happy to provide any additional information that might be necessary....I'm just not sure what information you might need in order to help. Thanks for your time.

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• Can a switch consume bandwidth?

  - by aashiq

  I have a network with a router and a switch. At first my ISP's optical fiber is connected with media converter input port. Than Ethernet cable (output port of Media converter) is connected with the switch. Then an output Ethernet cable is connected with our inner Microtik router. Then this router is connected with another LAN switch. From this switch we have got every connection other switch. It is our total network structure. Our bandwidth is 2 Mbps. From the 11th of March our MRTG graph shows high all the time even when my all switch is switched off except LAN switch. That's why our line is breaking up (Voice call). How could be it possible? My all PC's bandwidth is limited but when connected PC with media converter directly then the graph shows normal. That's why I can't blame my ISP.

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• How do I get a Belkin F5D8053 wireless adapter working?

  - by disassembler

  I've tried getting my Belkin N Wireless adapter to work on Ubuntu many times with no luck at all. Each time I seem to arrive at a dead end. After some thorough searching of UbuntuForums and WifiDocs I've gathered some information and narrowed the problem down to an issue with the rtl819xU driver. Here's some info that may help: $ sudo lshw -C network *-network DISABLED description: Wireless interface physical id: 1 bus info: usb@1:2 logical name: wlan0 serial: 00:22:75:38:52:ac capabilities: ethernet physical wireless configuration: broadcast=yes driver=rtl819xU multicast=yes wireless=802.11b/g/n $ sudo lsmod Module Size Used by vesafb 13449 1 snd_ice1724 106559 2 snd_ice17xx_ak4xxx 13163 1 snd_ice1724 snd_ac97_codec 105614 1 snd_ice1724 ac97_bus 12642 1 snd_ac97_codec snd_ak4xxx_adda 18436 2 snd_ice1724,snd_ice17xx_ak4xxx snd_ak4114 14326 1 snd_ice1724 snd_pt2258 12986 1 snd_ice1724 snd_i2c 13831 2 snd_ice1724,snd_pt2258 snd_ak4113 14307 1 snd_ice1724 snd_pcm 80244 4 snd_ice1724,snd_ac97_codec,snd_ak4114,snd_ak4113 fglrx 2434640 121 snd_seq_midi 13132 0 snd_rawmidi 25269 2 snd_ice1724,snd_seq_midi binfmt_misc 13213 1 snd_seq_midi_event 14475 1 snd_seq_midi snd_seq 51291 2 snd_seq_midi,snd_seq_midi_event ppdev 12849 0 snd_timer 28659 2 snd_pcm,snd_seq snd_seq_device 14110 3 snd_seq_midi,snd_rawmidi,snd_seq dcdbas 14054 0 r8192u_usb 297246 0 snd 55295 16 snd_ice1724,snd_ac97_codec,snd_ak4xxx_adda,snd_ak4114,snd_pt2258,snd_i2c,snd_ak4113,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore 12600 1 snd parport_pc 32111 1 snd_page_alloc 14073 1 snd_pcm shpchp 32345 0 lp 13349 0 parport 36746 3 ppdev,parport_pc,lp usbhid 41704 0 hid 77084 1 usbhid e100 40108 0 floppy 60032 0 $ sudo iwconfig wlan0 802.11b/g/n Mode:Managed Access Point: Not-Associated Bit Rate:1 Mb/s Retry min limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=0/100 Signal level=0 dBm Noise level=0 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 I'd like to know if 1) Is the driver is properly installed and recognized by Ubuntu? 2) What can I do to load the drivers properly and make use of the adapter? Thanks!

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• How to keep your eyes on the prize?

  - by Ziv

  I'm about to go in a very intensive programming course (8AM-8PM every day of the week for three months), at the end of which I will be given a developer job-the job's quality and the project I will work on will depend on my performance in the course. Getting a good position in the company could be very beneficial and I would very much want that, does anyone have specific techniques or ways that he keeps himself concentrated on a goal for a long period of time?

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• IPv6 6to4 on Windows Server

  - by Graham Wager

  I'm looking for a relatively simple guide to setting up an IPv6 tunnel properly. This network currently has a server (Windows Server 2008R2) running RRAS that establishes connectivity to the internet using a demand-dial PPPoE connection and handles the NAT. It also hosts a DNS server and DHCP. My ISP does not support IPv6, but I have a static IPv4 address. I've read about 6to4 and signed up at tunnelbroker.net, but quickly felt out of my depth. How do I configure my network to use it, and how I should configure my DHCP server with regards to IPv6 addresses?

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• NAT and ISP Subnet when load balancing on pfsense?

  - by dannymcc

  I have a pfsense box that I'm trying to plan the configuration for. I am going to be load balancing two ISP's, each with their own /29 static IP subnet. The question I have is in relation to the way those IP's are associated with workstations on the local network. Currently I have some workstations with local (192.168.1.0/29) IP addresses, and other more complicated workstation setups have their own public IP address. Some of the more complicated systems have a NAT 1:1 configuration where I forward a public IP address to a local IP address. Others however are directly on the ISP subnet and cannot be seen on our local network. Is this configuration possible with pfsense? If so, what terms should I be looking through the documentation for? Here is a simple/brief diagram of what I am trying to achieve.

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• Open sourcing Thoughtsite - A discussion forum designed for Google App Engine

  Google App Engine is a powerful system, designed to take all the pain of infrastructure management and performance scaling out of web application programming. App Engine applications are...

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• Why would I learn C++11, having known C and C++?

  - by Shahbaz

  I am a programmer in C and C++, although I don't stick to either language and write a mixture of the two. Sometimes having code in classes, possibly with operator overloading, or templates and the oh so great STL is obviously a better way. Sometimes use of a simple C function pointer is much much more readable and clear. So I find beauty and practicality in both languages. I don't want to get into the discussion of "If you mix them and compile with a C++ compiler, it's not a mix anymore, it's all C++" I think we all understand what I mean by mixing them. Also, I don't want to talk about C vs C++, this question is all about C++11. C++11 introduces what I think are significant changes to how C++ works, but it has introduced many special cases that change how different features behave in different circumstances, placing restrictions on multiple inheritance, adding lambda functions, etc. I know that at some point in the future, when you say C++ everyone would assume C++11. Much like when you say C nowadays, you most probably mean C99. That makes me consider learning C++11. After all, if I want to continue writing code in C++, I may at some point need to start using those features simply because my colleagues have. Take C for example. After so many years, there are still many people learning and writing code in C. Why? Because the language is good. What good means is that, it follows many of the rules to create a good programming language. So besides being powerful (which easy or hard, almost all programming languages are), C is regular and has few exceptions, if any. C++11 however, I don't think so. I'm not sure that the changes introduced in C++11 are making the language better. So the question is: Why would I learn C++11? Update: My original question in short was: "I like C++, but the new C++11 doesn't look good because of this and this and this. However, deep down something tells me I need to learn it. So, I asked this question here so that someone would help convince me to learn it." However, the zealous people here can't tolerate pointing out a flaw in their language and were not at all constructive in this manner. After the moderator edited the question, it became more like a "So, how about this new C++11?" which was not at all my question. Therefore, in a day or too I am going to delete this question if no one comes up with an actual convincing argument. P.S. If you are interested in knowing what flaws I was talking about, you can edit my question and see the previous edits.

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