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  • SNMP closed state in CentOS

    - by anksoWX
    I'm having a problem here, I've added to my IPtables rules this: -A INPUT -p tcp -m state --state NEW -m tcp --dport 161 -j ACCEPT -A INPUT -p udp -m state --state NEW -m udp --dport 161 -j ACCEPT but when I scan with nmap or any other tool it says this: Not shown: 998 filtered ports PORT STATE SERVICE 22/tcp open ssh 161/tcp closed snmp also when I am doing: netstat -apn | grep snmpd tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN 3669/snmpd<br> udp 0 0 0.0.0.0:161 0.0.0.0:* 3669/snmpd<br> unix 2 [ ] DGRAM 226186 3669/snmpd Also: service iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination 1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:161 5 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:161 6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 7 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) num target prot opt source destination Any idea what's going on? There is no UDP in closed/open state. what do I have to do?

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  • Allow outgoing connections for DNS

    - by Jimmy
    I'm new to IPtables, but I am trying to setup a secure server to host a website and allow SSH. This is what I have so far: #!/bin/sh i=/sbin/iptables # Flush all rules $i -F $i -X # Setup default filter policy $i -P INPUT DROP $i -P OUTPUT DROP $i -P FORWARD DROP # Respond to ping requests $i -A INPUT -p icmp --icmp-type any -j ACCEPT # Force SYN checks $i -A INPUT -p tcp ! --syn -m state --state NEW -j DROP # Drop all fragments $i -A INPUT -f -j DROP # Drop XMAS packets $i -A INPUT -p tcp --tcp-flags ALL ALL -j DROP # Drop NULL packets $i -A INPUT -p tcp --tcp-flags ALL NONE -j DROP # Stateful inspection $i -A INPUT -m state --state NEW -p tcp --dport 22 -j ACCEPT # Allow established connections $i -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow unlimited traffic on loopback $i -A INPUT -i lo -j ACCEPT $i -A OUTPUT -o lo -j ACCEPT # Open nginx $i -A INPUT -p tcp --dport 443 -j ACCEPT $i -A INPUT -p tcp --dport 80 -j ACCEPT # Open SSH $i -A INPUT -p tcp --dport 22 -j ACCEPT However I've locked down my outgoing connections and it means I can't resolve any DNS. How do I allow that? Also, any other feedback is appreciated. James

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  • MySQL Clustering in a Sandbox

    MySQL's unique architecture allows for plugin storage engines. There is the MyISAM storage engine, the ARCHIVE storage engine and the InnoDB storage engine; so it makes sense then that MySQL's clustering solution involves a storage engine as well, namely the NDB (Network DataBase) storage engine.

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  • Search Engine Marketing Ardan Michael Blum, Would You Like to Learn SEO Like a Pro?

    Learning Search Engine Optimization techniques (SEO) along with keyword research is key to marketing yourself, your business, your website or your blog on the internet. Ardan Michael Blum is a Yahoo SEO expert out of Switzerland. He has over 9 years experience as a SEO expert and guarantees his clients first page rankings in the search engines. For a business, first page rankings can mean success! But, outsourcing to someone like Ardan Michael Blum is going to be costly.

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  • How to change Chrome default search engine from regional one to google.com without loosing search suggestion

    - by Karsus Ren
    I want to use google.com instead of google.com.hk as my default search engine in Chrome. I tried to use custom search engine, but they all break search suggestions, not even something like https://encrypted.google.com/search?q=%s&{google:RLZ}{google:acceptedSuggestion} {google:originalQueryForSuggestion}{google:assistedQueryStats} {google:searchFieldtrialParameter}sourceid=chrome&ie={inputEncoding} which include parameters like acceptedSuggestion that seems to imply seach suggestions being enabled. But no, search suggestions still don't work. In addition. some websites suggest editing Local State file under Chrome's setting folder. I already tried that, and it didn't work at all. So, is there any way to use google.com as default search engine without breaking search suggestions?

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  • Créez vos propres jeux 3D comme les pros, avec le Blender Game Engine, un livre de Grégory Gosselin De Bénicourt

    Créez vos propres jeux 3D comme les pros Avec le Blender Game Engine Longtemps réservée à un cercle de programmeurs passionnés, la 3D peine encore à s'inviter au sein des petits studios de jeux indépendants, et pour cause: le ticket d'entrée est relativement élevé. Blender (logiciel gratuit et Open Source) permet de modéliser, d'animer, de faire un rendu 3D et surtout d'être utilisé comme moteur de jeu. C'est l'outil parfait pour le débutant, mais également pour celui qui veut créer un...

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  • What dangers await if I block non-standard, non-major-usa search engine bots from my USA only website?

    - by Ryan
    I noticed tons of bandwidth being used by non-USA search engine bots, so I began blocking them in an effort to save bandwidth and cpu cycles for actual users and the search engines they come from (Google, Bing, Yahoo, Ask, etc.). Other than potentially losing some international traffic (which isn't really important to us since all of our content is very USA-centric), what additional dangers should I be concerned about? I'm using a modified version of Jeff Starr's User Agent Blocklist

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  • Is it possible to make/translate a 3d engine to ruby on rails?

    - by user20529
    I am looking to make a 3D FPS that runs inside web browsers. I looked into using WebGL, but it didn't seem far enough along into development. I decided on using RoR because Ruby was a language I knew. I realize this may seem like a ridiculous question, but is there any way I can port/rewrite/whatever a game engine(Say for instance IrrLicht) to run inside Rails? Or for that matter, any other language on the web.

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  • What is Search Engine Optimization - An Art Or Science?

    As ridiculous and as outrageous as this question might sound, there has been no evident and obvious answer to this. The fact that the process of Search Engine optimization is an art or mere science is something that web scholars have been debating for a long time, and to people's amusement, have still not come to a concrete conclusion. One important step that was taken towards having this question answered or finding an answer to it was asking all the service providers about the way they think of SEO.

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  • How should I structure my turn based engine to allow flexibility for players/AI and observation?

    - by Reefpirate
    I've just started making a Turn Based Strategy engine in GameMaker's GML language... And I was cruising along nicely until it came time to handle the turn cycle, and determining who is controlling what player, and also how to handle the camera and what is displayed on screen. Here's an outline of the main switch happening in my main game loop at the moment: switch (GameState) { case BEGIN_TURN: // Start of turn operations/routines break; case MID_TURN: switch (PControlledBy[Turn]) { case HUMAN: switch (MidTurnState) { case MT_SELECT: // No units selected, 'idle' UI state break; case MT_MOVE: // Unit selected and attempting to move break; case MT_ATTACK: break; } break; case COMPUTER: // AI ROUTINES GO HERE break; case OBSERVER: // OBSERVER ROUTINES GO HERE break; } break; case END_TURN: // End of turn routines/operations, and move Turn to next player break; } Now, I can see a couple of problems with this set-up already... But I don't have any idea how to go about making it 'right'. Turn is a global variable that stores which player's turn it is, and the BEGIN_TURN and END_TURN states make perfect sense to me... But the MID_TURN state is baffling me because of the things I want to happen here: If there are players controlled by humans, I want the AI to do it's thing on its turn here, but I want to be able to have the camera follow the AI as it makes moves in the human player's vision. If there are no human controlled player's, I'd like to be able to watch two or more AI's battle it out on the map with god-like 'observer' vision. So basically I'm wondering if there are any resources for how to structure a Turn Based Strategy engine? I've found lots of writing about pathfinding and AI, and those are all great... But when it comes to handling the turn structure and the game states I am having trouble finding any resources at all. How should the states be divided to allow flexibility between the players and the controllers (HUMAN, COMPUTER, OBSERVER)? Also, maybe if I'm on the right track I just need some reassurance before I lay down another few hundred lines of code...

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  • Windows Azure : plus simple, plus flexible, plus ouvert, Microsoft n'a plus peur de la concurrence d'Amazon et de Google App Engine

    Windows Azure : plus simple, plus flexible, plus ouvert Et moins cher, Microsoft n'a plus peur de la concurrence d'Amazon et des Google Apps Engine « Simplicité, ouverture, flexibilité ». Jérôme Trédan, directeur des Produits Serveurs et Plateformes de Cloud Computing chez Microsoft,, résume en trois mots la nouvelle version de Windows Azure, la plateforme Cloud de Microsoft, qui vient d'être rendu publique ce matin à minuit quinze, heure de Paris. Comme nous le soulignions hier, c'est la dimension IaaS qui suscite le plus d'enthousiasme en interne autour de cette « Spring Release ». Cette Infrastructure à la...

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  • How to rewrite a TCP MMOG server designed to run in a single machine, in a distributed way?

    - by Dokkat
    I have a MMOG server running on C++, using winsockets. My server won't support more than 200 players. I had the idea of redesigning it so it will use multiple servers instead of one, so, maybe, for example, each server could take care of a number of players, and, if it was too laggy, it could transfer the responsability of that player to other server. I'm not sure of how to program a consistent game logic like that, though. Are there techniques for this?

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  • Search Engine Optimization and SEO Services - What Do They Offer?

    Search engine optimization involves using the Internet as a marketing tool. Companies that are using the Internet to attract customers desire to optimize their exposure to potential to customers. In order to best advantage of SEO, it is recommended that you hire a professional service that can implement programs to evaluate the optimum marketing potential of the Internet. When considering hiring a company to assist you in this process it is important to understand how such services work.

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  • Is it possible to use 3G internet for a TCP/IP game server?

    - by Amit Ofer
    I'm working on a turned based multiplayer android game with a friend. I started working on the game server and client using socket programming. I found a few tutorials on how to implement a basic chat on android and I started extending that example to suit my needs. Basically the game is really simple and the communication only include sending a few string from the client to the server every turn and sending the calculated scores back to all the clients after each turn. the idea is that one of the players creates the game and thus initialize the server, and each player connects to this client using ip. I tried this solution and it seems to work great when all the players are using the same wifi connection or by using router port forwarding. The problem is when trying to use 3G internet for the server, I guess the problem is that 3G ip address isn't global and you can't use port forwarding there, correct me if I'm wrong here. Is there a way to overcome this issue? or the only solution is to limit my game to wifi only or think of a different solution than the standard socket programming solution? I.E web server etc. what do you think would be the best approach here? Thanks.

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  • Why Does On-Page Search Engine Optimization Work So Well?

    On-page search engine optimization has been around since an inordinately long time - probably it is the first kind of SEO that marketers began to use - but it is only lately that people have begun to understand its great efficacy in bolstering the prospects of any website. The term is used to describe all methods you use on the page of the website in order to enhance its prospects with the search engines.

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  • Have You Considered Search Engine Training As a Career Option?

    The SEO industry is really pumping and is becoming a way of life for many small businesses as well as those seeking search engine training. This industry is no longer the nerd industry as SEO has exploded into the mainstream over the past few decades and all businesses now want to be visible online and they will pay hundreds of dollars for this privilege.

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  • What Are the Top 4 Search Engine Optimization Techniques of Today?

    Today, with the over-whelming competitions among the web masters in competing for customers to increase their sales and profit, finding ways to increase to optimize their websites is not really very difficult. There are whole lots of SEO (Search engine optimization) techniques which can be found over the internet today, which majority of them are really very user friendly which even a novice web-master with limited HTML knowledge find it not that difficult to get the most out of it as long as they have the will to learn and improve in their search ranking.

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  • How to Cut Search Engine Optimization Cost Down For Backlink Building?

    How much do you spend to get your high backlinks? I am guessing a good amount if you are paying a service to do it for you, or if you are buying backlink packets made by other people and paying a monthly fee. You can cut your search engine optimization cost greatly with some easy to use software, and even outsource the work for much cheaper than other SEO services.

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  • How Search Engine Optimization Will Bring You More Real Estate Leads!

    Most real estate agents out there today are struggling, weighed down in the quagmire that has burdened our financial system and driven many out of the business altogether. Nonetheless, marketing your services is still at a premium and many do not have the funds needed to receive this valuable service. Many agent are wondering if there is a way they can do their own SEO and achieve a higher search engine ranking to bring in more leads from their website, and the easy answer is yes!

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  • Natural Search Engine Optimization - Don't "Game the System" Or You Will Get Banned!

    When focusing on natural search engine optimization, it is important that you keep the process "white hat." You see, when it comes to SEO, there are basically three schools of thought: White hat, Gray hat, and Black hat. As you can probably infer, white hat is following the rules, gray hat is a little in between, and black hat is going against parameters that Google and other major search engines have set for ethical SEO practices.

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