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• Routing from the DMZ to the interior network only

  - by Allan

  I have a home network connected to Verizon's FIOS service. Verizon's ActionTec router is connected to the ONT via coax to establish the MOCA network. My DD-WRT router's WAN port is connected to one of the ActionTec's LAN ports. The DD-WRT router is configured with a static IP address and assigned to the DMZ (this is done so I only have to configure port forwarding once). My issue is that this does not allow computers connected to the DD-WRT to serve streaming audio/video to the MOCA network using Verizon's Media Manager. I know that Media Manager uses ports 18001, 5050, and 5060, but I don't know how to forward those ports so that they are only available to the ActionTec's network and not the rest of the internet.

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• dd-wrt switch for PfSense

  - by Kmao

  I currently have eth2 on my pfsense set up, and configured as 192.168.1.1, it has dhcp setup with allocation being 192.168.1.10 - 192.168.1.245. On my dd-wrt box, i disabled the WAN, and set it to act as a port for the switch. I disabled dhcp, dnsmasq, spi firewall, Wlan0 and set a static IP for the router being 192.168.1.10 Pfsense is plugged into lan0 and pc plugged into lan1 (wan port is empty) I have followed a few different guides, but i can't seem to get my router to act as a switch. Anyone have success using DD-WRT as a switch while using pfsense as your dhcp/dns/gateway. Any advice would help :)

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• Postfix - exclude messages with specific header values from relayhost?

  - by Kyle MacFarlane

  Starting with the following basic configuration to relay all messages in Postfix to PostMarkApp.com: #start postmarkapps settings smtp_sasl_auth_enable = yes smtp_sasl_password_maps = static:secret:secret (where "secret is your API key") smtp_sasl_security_options = noanonymous relayhost = [smtp.postmarkapp.com]:25 #end postmarkapp settings The problem with this is if for example something starts spitting our error messages they will all go through PostMark and cost money. One way to bypass relayhost is to setup sender_dependent_relayhost_maps and have certain addresses map back to yourdomain.com. But this doesn't work in web apps where all messages are sent by the same user but with varying From headers. So how can I achieve the same effect as sender_dependent_relayhost_maps but looking at the From or Subject headers instead of merely the user?

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• What is the most efficient way to add and removed Slick2D sprites?

  - by kirchhoff

  I'm making a game in Java with Slick2D and I want to create planes which shoots: int maxBullets = 40; static int bullet = 0; Missile missile[] = new Missile[maxBullets]; I want to create/move my missiles in the most efficient way, I would appreciate your advise: public void shoot() throws SlickException{ if(bullet<maxBullets){ if(missile[bullet] != null){ missile[bullet].resetLocation(plane.getCentreX(), plane.getCentreY(), plane.image.getRotation()); }else{ missile[bullet] = new Missile("resources/missile.png", plane.getCentreX(), plane.getCentreY(), plane.image.getRotation()); } }else{ bullet = 0; missile[bullet].resetLocation(plane.getCentreX(), plane.getCentreY(), plane.image.getRotation()); } bullet++; } I created the method resetLocation in my Missile class in order to avoid loading again the resource. Is it correct? In the update method I've got this to move all the missiles: if(bullet > 0 && bullet < maxBullets){ float hyp = 0.4f * delta; if(bullet == 1){ missile[0].move(hyp); }else{ for(int x = 0; x<bullet; x++){ missile[x].move(hyp); } } }

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• Lost contact with my NAS after changing its IP

  - by Beles

  I did some brain-dead reconfiguring of my D-Link DNS-323 NAS some days ago. I have a home network where each computer gets a dynamically allocated IP address starting at 192.168.1.100. The irritating point (for me at least) was that the NAS changed IP if the power went down or I turned off the router. I then had to remap a drive-letter to point to the new IP address of the NAS. To remedy that I configured the NAS to have a static IP, 192.168.0.10. I had no good reason to choose that IP, other than I found it in a user manual for the NAS. After I changed the IP and rebooted the NAS it disappeared from the network and was never to be found again. Now I have a black brick standing in my home, looking good, but "dead". Could anyone point me in a direction which helps me solve this problem? I have about 100gb worth of pic of my children on this brick so I really want it back :-) Sincerely,

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• Locking down a server for shared internet hosting.

  - by Wil

  Basically I control several servers and I only host either static websites or scripts which I have designed, so I trust them up to a point. However, I have a few customers who want to start using scripts such as Wordpress or many others - and they want full control over their account. I have started to do the basics - like on php.ini, I have locked it down and restricted commands such as proc, however, there is obviously a lot more I can do. right now, using NTFS permissions, I am trying to lock down the server by running Application Pools and individual sites in their own user, however I feel like I am hitting brick walls... (My old question on Server Fault). At the moment, the only route I can think of is either to implement an off the shelf control panel - which will be expensive and quite frankly, over the top, or look at the Microsoft guide - which is really for an entire infrastructure, not for someone who just wants to lock down a few servers. Does anyone have any guides that can put me on the correct path?

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• Vmware Workstation Development Server on Laptop

  - by Koobz

  I'm running an Ubuntu guest OS on my Windows 7 laptop. Currently, I have it set up for bridged networking. The guest is os is configured for a static ip of 192.168.1.115, which depending on the network I'm connected to, may not be available. When I want to view my development work I hit that up in my web browser. I'm really looking for the following scenario: 1) My guest OS ip address stays constant. 2) I can access my guest os even if I don't have an internet connection, or a lan/router. 3) I can share files with my guest/host. How does one accomplish this using VMware Workstation?

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• Setting up wifi router as a switch for Internet Connection Sharing

  - by William C

  Can my laptop with a 3G connection share its Internet via a Wifi router (Dlink DIR-615)? I turned Internet Connection Sharing on and Windows assigned 192.168.137.1 to my laptop's LAN adapter. Do I connect my laptop to the WAN port or to the LAN port of the router? What should I set as my router's IP address? Do I turn DHCP on my router on? Do I assign 192.168.137.x as static addresses on the other computers? If not, what? Is there anything else I need to set on my router? Thank you!

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• XNA model drawing problem

  - by user1990950

  When using this code: public static void DrawModel(Model model, Vector3 position, Vector3 offset, float xRotation, float yRotation, float zRotation, float allrot, float xScale, float yScale, float zScale) { position.Y *= -1; offset.Y *= -1; Matrix worldMatrix = ((Matrix.CreateRotationZ(MathHelper.ToRadians(zRotation)) * Matrix.CreateRotationX(MathHelper.ToRadians(xRotation))) * Matrix.CreateRotationY(MathHelper.ToRadians(yRotation))) * (Matrix.CreateTranslation(offset) * Matrix.CreateRotationY(MathHelper.ToRadians(allrot))) * Matrix.CreateScale(xScale, yScale, zScale); worldMatrix *= Matrix.CreateTranslation(position) * theCamera.GetTransformation() * Matrix.CreateTranslation(new Vector3(-(graphics.GraphicsDevice.Viewport.Width / 2), graphics.GraphicsDevice.Viewport.Height / 2, 0)); foreach (ModelMesh mesh in model.Meshes) { for (int i = 0; i < mesh.Effects.Count; i++) { ((BasicEffect)mesh.Effects[i]).EnableDefaultLighting(); ((BasicEffect)mesh.Effects[i]).World = worldMatrix; ((BasicEffect)mesh.Effects[i]).View = viewMatrix; ((BasicEffect)mesh.Effects[i]).Projection = projectionMatrix; } mesh.Draw(); } } The model rotates and then scales. It should scale and then rotate, but whenever I try to change it, it won't work.

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• Staggering java linux process startup to prevent OOM

  - by ctennis

  I am running a number of java processes on a single Linux machine. From a memory and computing standpoint, everything is fine when things are static. However, periodically we use a configuration management package up upgrade the jar or war files, and restart the java process. The problem is, that is restarts them all relatively quickly, and so we get 10 or so java VMs restarting all at the same time (we use daemontools for the service stops/starts), which wreaks havoc on the machine, in terms of OOMs or just really slow. This is because it's spawning the JVM 10x at the same time. Other than trying to stagger the startups, is there a smarter way of handling this? Maybe a sysctl tuning performance parameters, or a JVM parameter?

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• OpenBSD has open ports in default installation

  - by celil

  I have been considering replacing Ubuntu with OpenBSD to improve the security on my local server. I need to have ssh access to it, and I also need it to serve static web content - so the only ports I need open are 22 and 80. However, when I scan my server for open ports after installing OpenBSD 4.8, and enabling ssh and http at /etc/rc.conf httpd_flags="" sshd_flags="" I discovered that it had several other open ports: Port Scan has started… Port Scanning host: 192.168.56.102 Open TCP Port: 13 daytime Open TCP Port: 22 ssh Open TCP Port: 37 time Open TCP Port: 80 http Open TCP Port: 113 ident ssh (22) and http (80) should be open as I enabled httpd and sshd, but why are the other ports open, and should I worry about them creating additional security vulnerabilities? Should they be open in a default installation?

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• What Should I Do? [closed]

  - by Laxmidi

  What is a reasonable goal in terms of traffic for my Flex 3 site: www.brainpinata.com Since I began a couple of months ago, I've gotten roughly 5500 ad views and 280 ad clicks. And the ad revenue is a whopping $4.80. (I don't use Google Adsense). I advertise my site using Google Adwords to try to build traffic. My budget is $10/day. What should I do? a) Push the marketing. Add a blog. Try to get backlinks, contact blogs, start a Facebook page, tweet, etc. b) Google is only indexing the static content in the SWF. The questions/answers are pulled from a mySQL database. So, Google doesn't index 99% of the content. Should I re-do the site in HTML/Javascript and hard-code the questions for each puzzle? (This would be a challenge as I don't know javascript worth squat.) Or should I hard-code the questions in XML and put them in the Flex app? If I put the questions in an XML file it's roughly 500 KB. Other ideas? c) Should I switch ad networks? (I currently get about 100 visitors a day). My ad network pays so little that if I were to make even $500/month, I would need 550,000 ad views/month, which seems impossible. If I go ahead and switch ad networks, I need to find one that allows iFrames as I've got a Flex website. Which ad networks permit their ads to be shown in iFrames? d) Should I cut and run? I put a lot of work into this project and it would really stink to get nothing out of it. I'm looking for some good advice. Looking forward to your suggestions. Thank you. -Laxmidi

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• How can I make permanent death in a MUD seem acceptable and fair to players?

  - by Luke Laupheimer

  I have considered writing a MUD for years, and I have a lot of ideas my friends think are really cool (and that's how I'd hope to get anywhere -- word of mouth). Thing is, there's one thing I have always wanted, that my friends and strangers hated: permanent death. Now, the emotional response I get to this is visceral revulsion, every time. I'm pretty sure I am the only person that wants this, or if I'm not, I'm a tiny minority. Now, the reason I want it is because I want the actions of the players to matter. Unlike a lot of other MUDs, which have a set of static city-states and social institutions etc, I want the things my players do, should I get any, to actually change the situation. And that includes killing people. If you kill someone, you didn't send them to time out, you killed them. What happens when you kill people? They go away. They don't come back in half an hour to smack talk you some more. They're gone. Forever. By making death non-permanent, you make death not matter. It would be similar if a climax to a character's arc is getting a speeding ticket. It cheapens it. Non-permanent death cheapens death. How can I: 1) Convince my players (and random people!) that this is actually a good idea?, or 2) Find some other way to make death and violence matter as much as it does in real life (except within the game, of course) sans character deletion? What alternatives are there out there?

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• Connect to wired and wireless networks at same time, Ubuntu

  - by Gary Chambers

  Currently, I have a media PC running Ubuntu 10.04 that I am trying to connect via a wired network cable directly to a NAS box, and wirelessly to the router. This works no problem after I run sudo /etc/init.d/networking restart but I can't get both interfaces to come up on system startup. My /etc/network/interfaces file reads as follows: auto eth0 iface eth0 inet static address 10.0.1.2 netmask 255.255.254.0 broadcast 10.0.1.255 network 10.0.1.0 auto wlan2 iface wlan2 inet dhcp As I say, I know this works, because I can get it to work by restarting the network interfaces, but I can't bring them both up on system startup. Does anyone know why this might be?

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• Name for Osherove's modified singleton pattern?

  - by Kazark

  I'm pretty well sold on the "singletons are evil" line of thought. Nevertheless, there are limited occurrences when you want to limit the creation of an object. Roy Osherove advises, If you're planning to use a singleton in your design, separate the logic of the singleton class and the logic that makes it a singleton (the part that initializes a static variables, for example) into two separate classes. That way, you can keep the single responsibility principle (SRP) and also have a way to override singleton logic. (The Art of Unit Testing 261-262) This pattern still perpetuates the global state. However, it does result in a testable design, so it seems to me to be a good pattern for mitigating the damage of a singleton. However, Osherove does not give a name to this pattern; but naming a pattern, according to the Gang of Four, is important: Naming a pattern immediately increases our design vocabulary. It lets us design at a higher level of abstraction. (3) Is there a standard name for this pattern? It seems different enough from a standard singleton to deserve a separate name. Decoupled Singleton, perhaps?

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• Rails time stamps on images in CSS

  - by brad

  Just posted this on Stack but realized it may be more appropriate here: So Rails time stamping is great. I'm using it to add expires headers to all files that end in the 10 digit timestamp. Most of my images however are referenced in my CSS. Has anyone come across any method that allows for timestamps to be added to CSS referenced images, or some funky re-write rule that achieves this? I'd love for ALL images in my site, both inline and in css to have this timestamp so I can tell the browser to cache them, but refresh any time the file itself changes. I couldn't find anything on the net regarding this and I can't believe this isn't a more frequently discussed topic. I don't think my setup will matter because the actual expiring will hopefully happen the same way, based on the 10 digit timestamp, but I'm using apache to serve all static content if that matters

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• What's the best way to compare blocks in a matching game that can be multiple colors?

  - by Ryan Detzel

  I have a match 3-4 game and the blocks can be one of 7 colors. There are an addition 7 blocks that are a mix of the original 7 colors so for example there is a red and blue block and there is also a red/blue block which can be matched with either the red or the blue. My original thought is just to use binary operations so. int red = 0x000000001; int blue = 0x000000010; int redblue = 0x000000011; Then just do an & operation so see if they match. Does this sound like a decent plan or am I over complicating it? edit: Better yet so it's more readable. int red = 1; int blue = 2; int red_blue = 3; int yellow = 4; int red_yellow = 5; maybe as defines or static vars?

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• Do you think Scala will be the dominant JVM langauge, ie be the next Java? [on hold]

  - by user1037729

  From what I've read about Scala do far I think it has some nice features but I do not think it should be "the next Java". It might however end up being the next Java (due to fashion rather than fact) but lets not hope it does not... To me adds a lot of complexity over Java which is a simple and scalable language. Scala Pattern matching allows you to perform some type/value checking in a more concise way, this is possible in Java, Scala's pattern matching has a limit to it, you cannot continuously match deeper and deeper down the object graph, so why not just stick to Java and use decent invariants? Scala provides tuples, easy enough to make in Java, create a static factory method and it all reads nicely too. Scala provides mixins, why not just use composition? I believe Scala implicit's are bad, they can lead to code becoming complex and hard to maintain, explicitness is good. Scala provides closures, well they will be in Java 8 too. Scala has lazy keyword for lazy instantiation, this is easy enough to do in Java by calling a getter which creates the instance when needed, no hidden magic here. Scala can be used with AKKA, well so can Java, there is an Java AKKA implementation. Scala offers addition functional features but these can all be created in Java, there are many frameworks with have implemented functional features in Java. All in all Scala seems to offer is addition complexity and thats it...

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• Bizarre SSH Problem - It won't even start

  - by thallium85

  I recently got Ubuntu 12.04 Precise, got it up and running with some MediaWiki software, static IP on the box and router and was able to access the main page even from a cell phone. Everything seemed great... Then I wanted to finally get rid of the monitor and keyboard and login remotely via SSH. I installed openssh-server, let everything point to port 22 for a test run and installed putty on my Windows XP machine. I got a connection refused. Went back and started checking the Ubuntu install itself... (I'm under root from this point on) $ sudo -s $ service ssh status ssh stop/waiting $ service ssh start ssh start/running, process 2212 $ service ssh status ssh stop/waiting Apparently ssh has stopped or is waiting for something.... $ ssh localhost ssh: connect to host localhost port 22: Connection refused I can't even connect to myself... I checked ufw (firewall) to see if port 22 is doing alright... $ sudo ufw status Status: active To Action From 22 ALLOW Anywhere 22/tcp ALLOW Anywhere 22 ALLOW Anywhere (v6) 22/tcp ALLOW Anywhere (v6) sshd_config shows only Port 22 Is ssh not using the right IP address at all? I just don't get what I did wrong here. When this is up and running I will def change the port number, but for now, I don't want to mess with the default install too much until a test run with putty is successful. Edit: Here are my sshd_config file and my ssh_config file. The command /usr/sbin/sshd -p 22 -D -d -e returns: /etc/ssh/sshd_config line 159: Subsystem 'sftp' already defined. Edit: @phoibus moving the sshd_config file and reinstalling did the trick! service ssh status the above command shows that ssh is now running and I am now able to log in from my windows xp computer remotely via putty. Thanks so much! I can now use my monitor for other things!

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• DataContractSerializer truncated string when used with MemoryStream,but works with StringWriter

  - by Michael Freidgeim

  We've used the following DataContractSerializeToXml method for a long time, but recently noticed, that it doesn't return full XML for a long object, but  truncated it and returns XML string with the length of  multiple-of-1024 , but the reminder is not included. internal static string DataContractSerializeToXml<T>(T obj) { string strXml = ""; Type type= obj.GetType();//typeof(T) DataContractSerializer serializer = new DataContractSerializer(type); System.IO.MemoryStream aMemStr = new System.IO.MemoryStream(); System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(aMemStr, null); serializer.WriteObject(writer, obj); strXml = System.Text.Encoding.UTF8.GetString(aMemStr.ToArray()); return strXml; }   I tried to debug and searched Google for similar problems, but didn't find explanation of the error. The most closed http://forums.codeguru.com/showthread.php?309479-MemoryStream-allocates-size-multiple-of-1024-( talking about incorrect length, but not about truncated string.fortunately replacing MemoryStream to StringWriter according to http://billrob.com/archive/2010/02/09/datacontractserializer-converting-objects-to-xml-string.aspxfixed the issue.   1: var serializer = new DataContractSerializer(tempData.GetType());   2: using (var backing = new System.IO.StringWriter())   3: using (var writer = new System.Xml.XmlTextWriter(backing))   4: {   5:     serializer.WriteObject(writer, tempData);   6:     data.XmlData = backing.ToString();   7: }v

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• Why does a redirect from a local IP address assume localhost?

  - by Jeremy

  I am developing a web application on my desktop and it is running on port 80. I am able to access the application from my laptop connected to the LAN by entering my desktop's LAN IP address 192.168.1.8. Now, my application sends a redirect after login, but my laptop assumes the final address is localhost/login. If I manually type in the IP address and URI for any page, it shows that I am logged in, so it works as expected. So, why does the redirect assume localhost? Both of my machines are linux-based. The laptop being Chrome OS. I am running nginx which proxies non-static file requests to jetty on port 8080.

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• Passenger, Apache and avoiding page caching

  - by user38382

  I'm hosting a rack application with passenger and apache. The application is setup to cache the content of each request to the public directory after each request. This allows apache to serve the content directly as a static page for future requests. I would like to tell Apache, presumably through some rewrite rules that any requests with query parameters should not be cached, but instead passed down to the rack application. With a mongrel setup I would just redirect it to the balancer if it meets my rewrite conditions. How do you do the same with passenger?

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• LinkSys WRT54GL + AM200 in half-bridge mode - UK setup guide recommendations?

  - by Peter Mounce

  I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. I live in the UK and my ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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• LinkSys WRT54GL + AM200 in half-bridge mode - UK setup guide recommendations?

  - by Peter Mounce

  Crossposted from here I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. I live in the UK and my ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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• Abstract Factory Method and Polymorphism

  - by Scotty C.

  Being a PHP programmer for the last couple of years, I'm just starting to get into advanced programming styles and using polymorphic patterns. I was watching a video on polymorphism the other day, and the guy giving the lecture said that if at all possible, you should get rid of if statements in your code, and that a switch is almost always a sign that polymorphism is needed. At this point I was quite inspired and immediately went off to try out these new concepts, so I decided to make a small caching module using a factory method. Of course the very first thing I have to do is create a switch to decide what file encoding to choose. DANG! class Main { public static function methodA($parameter='') { switch ($parameter) { case 'a': $object = new \name\space\object1(); break; case 'b': $object = new \name\space\object2(); break; case 'c': $object = new \name\space\object3(); break; default: $object = new \name\space\object1(); } return (sekretInterface $object); } } At this point I'm not really sure what to do. As far as I can tell, I either have to use a different pattern and have separate methods for each object instance, or accept that a switch is necessary to "switch" between them. What do you guys think?

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