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• Xen private networking between multiple hosts

  - by Joe

  I have two physical hosts running Xen 3.2, sharing storage via iSCSI. On these two hosts are a number of domUs and I'd like to network them in multiple private networks so they can only contact other domUs on their private network. My understanding of the xen documentation suggests it's possible to do this within one dom0 (ie create virtual networks between domUs), but I've found nothing explaining how this can be implemented across multiple dom0s on different hosts. The only thing that jumps to mind is manually creating iptable rules to route data to the other host, but this seems to lack elegance and could quickly grow cumbersome. Any suggestions? All advice is much appreciated!

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• Network vulnerability and port scanning services

  - by DigitalRoss

  I'm setting up a periodic port scan and vulnerability scan for a medium-sized network implementing a customer-facing web application. The hosts run CentOS 5.4. I've used tools like Nmap and OpenVAS, but our firewall rules have special cases for connections originating from our own facilities and servers, so really the scan should be done from the outside. Rather than set up a VPS or EC2 server and configuring it with various tools, it seems like this could just be contracted out to a port and vulnerability scanning service. If they do it professionally they may be more up to date than something I set up and let run for a year... Any recommendations or experience doing this?

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• Ubuntu, control the init startup

  - by Xolve

  Ubuntu uses upstart instead of sysvinit. However there are still runlevels and the links in them. I have installed tor and it has added itself to the startup of the OS. Now I want to remove it and the popular options are to remove the links of starting and stopping the service from runlevels or make the /etc/init.d/ script non-executable. This is fine but this will be problematic in case I want to put tor again on the startup list. How would I know to put the proper sequences in the proper runlevel directories. Is there any complete guide given? What are the rules for this? Any tools to manage the init? Please tell

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• How do I keep Conditional Formatting formulas and ranges from automatically changing?

  - by Iszi

  I've found that Conditional Formatting formulas and ranges will automatically adjust when you copy, delete, or move data around in a spreadsheet. While this is a nice idea, it tends to break things for me in some rather weird ways. To avoid this, I tried writing rules that applied to the entire spreadsheet and keyed off of column headers to highlight the data I wanted to check. Example: =AND(A$1="Check This Column For Blanks),ISBLANK(A1)) applied to =$1:$1048576 However, even with the rule explicitly applied to the entire sheet, it was still automatically adjusting (and breaking in weird ways by doing so) as I worked in the sheet. How can I avoid this?

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• Java application server behind IIS 7.5 on Windows Server 2008

  - by perissf

  I have a Java application server (GlassFish, indeed, but the problem is the same for any other application server, I guess), running on port 8080. And I have IIS 7.5 listening on port 80 as by default configuration. I want to avoid people typing the port because it's unprofessional. So I want that when somebody types http://myserver the traffic is directed to IIS. And this is how it already works now. But I also want that when somebody types http://myserver/java the traffic is directed to port 8080 and consequently my GlassFish splash screen is displayed. If I have deployed an application on GlassFish under context root app1, typing http://myserver/java/app1 should access the application. How can I do this? I have tried with adding some rules with the URL Rewrite utility from IIS7.5 UI, but this shows the port after the rule has rewritten the url, and I want to avoid it.

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• HAProxy NGInx SSL setup

  - by Niclas

  I've been looking around different setups for a server cluster supporting SSL and I would like to benchmark my idea with you. Requirements: All servers in the cluster should be under the same full domain name. (http and https) Routing to subsystems is done on URI matching in HA proxy. All URIs have support for SSL support. Wish: Centralizing routing rules ---<----http-----<-- | | Inet -->HA--+---https--->NGInx_SSL_1..N | | +---http---> Apache_1..M | +---http---> NodeJS Idea: Configure HA to route all SSL traffic (mode=tcp,algorithm=Source) to an NGInx cluster turning https traffic into http. Re-pass the http traffic from NGInx to the HA for normal load-balancing which performs load balancing based on HA config. My question is simply: Is this the best way to to configure based on requirements above?

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• Best Template Engine for ASP.NET MVC

  - by OnesimusUnbound

  I am exploring ASP.NET MVC and I wanted to add jQuery to make the site interactive. I used StringTemplate, ported to .Net, as my template engine to generate html and to send JSON. However, when I view the page, I could not see it. After debugging, I've realized that the $ is used by the StringTemplate to access property, etc and jQuery uses it too to manipulate the DOM. Gee, I've looked on other template engines and most of them uses the dollar sign :(. Any alternative template engine for ASP.Net MVC? I wanted to retain jQuery because MSFT announced that it will used in the Visual Studio (2008?) Thanks in Advance :)

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• Minimalistic PHP template engine with caching but not Smarty?

  - by Pekka

  There are loads of questions for "the right" PHP template engine, but none of them is focused on caching. Does anybody know a lightweight, high-quality, PHP 5 based template engine that does the following out of the box: Low-level templating functions (Replacements, loops, and filtering, maybe conditionals) Caching of the parsed results with the possibility to set an individual TTL per item, and of course to force a reload programmatically Extremely easy usage (like Smarty's) Modest in polluting the namespace (the ideal solution would be one class to interact with from the outside application) But not Smarty. I have nothing against, and often use, Smarty, but I am looking for something a bit simpler and leaner. I took a look at Fabien Potencier's Twig that looks very nice and compiles templates into PHP code, but it doesn't do any actual caching beyond that. I need and want a template engine, as I need to completely separate code and presentation in a way that a HTML designer can understand later on, so please no fundamental discussions about whether template engines in PHP make sense. Those discussions are important, but they already exist on SO.

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• vhost.conf with plesk makes infinite loop

  - by user134598

  So I'm trying to make rewrite rules for my just migrated site and now we're using PLESK (unfortunately in my opinion). So, in order to make those rewrites I'm using the vhost.conf file in mydomain/conf folderm and I execute: /usr/local/psa/admin/sbin/websrvmng -u --vhost-name=mydomain.org so that includes my file into the httpd configuration. However, no matter what I write in my vhost.conf file, it will make my site go in an infinite loop whenever I try to load an URL that's not just the domain. Example: mydomain.org Works just fine. mydomain.org/event/nameofevent Will try endlessly to load and eventually my browser will detect that infinite loop. I though I was writing something incorrectly in my vhost.conf file but I even tried it with the file empty (not a single line). It will still try to load endlessly. Anybody can hint me if I'm skipping a step before (like any activation that should be done beorehand or something). Thanks in advance.

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• windows firewall and network location switch after establishing a vpn connection

  - by Konrads

  I am looking for a reasonable solution for network location switching after VPN connection is established for Windows 7. The scenario is as follows: For location public (employee plugging in his laptop in hotel, public wi-fi,etc) all inbound connections are restricted, only outbound VPN + www is enabled. Employee then initiates a VPN connection, VPN pushes routes to 10.0.0.0/8 subnet Now I would like to have lax security rules for traffic from/to 10.0.0.0/8 that comes through the VPN interface, while still protecting the laptop from traffic that comes via uplink interface as if it was private. How to achieve this switching and duality? One option I see is switching to IPSec...

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• Essential Programming Tools

  - by Mat

  We all have different needs due to the platform and/or stack we work with, and simple programmer preference is famous for starting religious wars. However, in each area there is usually a set of tools that get recommended over and over, even though people might individually prefer one member over the others. Unix text mode code editors, for example, is an extremely contentious issue but no one can deny that most people will choose either vi or emacs. So, without criticising the alternatives, recommend me developement tools. Text editors for different platforms, version control systems, bug trackers, database engines, templating systems... whatever! What do you enjoy using every day? I'll edit together the answers as a list of highly recommended tools in each area. Please don't start discussing which is the best ;)

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• Is there a way to determine which service does an outgoing connection?

  - by fluxtendu

  I'm redoing my firewall configuration with more restrictive policies and I would like to determine the provenance (and/or destination) of some outgoing connections. I have an issue because they come from svchost.exe and go to web content/application delivery providers - or similar: 5 IP in range: 82.96.58.0 - 82.96.58.255 --> Akamai Technologies akamaitechnologies.com 3 IP in range: 93.150.110.0 - 93.158.111.255 --> Akamai Technologies akamaitechnologies.com 2 IP in range: 87.248.194.0 - 87.248.223.255 --> LLNW Europe 2 llnw.net 205.234.175.175 --> CacheNetworks, Inc. cachefly.net 188.121.36.239 --> Go Daddy Netherlands B.V. secureserver.net So is it possible to know which service does a particular connection? Or what's your recommendation about the rules applied to these ones? (Comodo Firewall & Windows 7)

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• Why does waking a PC up with a timer act differently than with the power button?

  - by Dan Rasmussen

  I have a Windows 7 machine set up as a server. It has no monitor and is only accessed through remote desktop. I set up two scheduled tasks, one to put the computer to sleep at night and another to wake it up in the morning. When it's woken up from sleep via a timer, it stays awake for only a couple minutes before going back to sleep. When woken up by pushing the power button, however, it stays awake all the way until the sleep timer. Why does my PC behave differently in these two scenarios? I have set the PC not to prompt for a user's password on wake, since I worried that the login screen might follow different power rules. I tried SmartPower Configuration but had the same problems. I can provide more details if questions are asked in the comments, but I'm not sure what's relevant.

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• Favorite web host.

  - by Greg Hostetler

  I've used many over the years like Media Temple gs, dreamhost, slicehost, and some others that I don't care to remember. But it's pretty hard to find a new host with search engines, because they normally give you those crappy affiliate driven reviews sites. Which host would you use for: Small personal websites with small traffic. Medium to large websites/applications with medium to large traffic. What host would you use for your assets (large images, media, etc...). Favorite dedicated/vps host.

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• How to configure remote access to multiple subnets behind a SonicWALL NSA 2400

  - by Kyle Noland

  I have a client that uses a SonicWALL NSA 2400 as their firewall. I need to setup a second LAN subnet for a handful of PC. Management has decided that there should be a second subnet even though intend to allow access across the two subnets - I know... I'm having trouble getting communication across the 2 subnets. I can ping each gateway, but I cannot ping or seem to route traffic fron subnet A to subnet B. Here is my current setup: X0 Interface: LAN zone with IP addres 192.168.1.1 X1 Interface: WAN zone with WAN IP address X2 Interface: LAN zone with IP address 192.168.75.1 I have configured ARP and routes for the secondar subnet (X2) according to this SonicWALL KB article: http://www.sonicwall.com/downloads/supporting_multiple_firewalled_subnets_on_sonicos_enhanced.pdf using "Example 1". At this point I don't minding if I have to throw the SonicWALL GVC software VPN client into the mix to make it work. It feel like I have an Access Rule issue, but for testing I made LAN LAN, WAN LAN and VPN LAN rules wide open with the same results.

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• Block P2P traffic on a Linksys router WRT54G with Tomato firmware

  - by Kami

  I'm running a small wireless network (6 to 10 users) on a Linksys WRT54G with Tomato firmware sharing an Internet connection. I don't want the users to download files with BitTorrent (mainly used) and other P2P apps. I've also found some solutions about lowering P2P traffic priority using QoS. I really need to ban P2P traffic. Does anyone know how to setup some rules to deny that kind of traffic? I've tried to setup an Access Restriction Rule: However it's not working at all.

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• "OR" clause in Outlook 2007 Search Folders - Folder Composition

  - by Thomas L Holaday

  Is it possible to specify a Search Folder in Outlook 2007 that will use an OR rule ("any") instead of an AND rule ("and")? In particular, I have a search folder named A and another named B; I want a search folder named AB that will have all the messages that are in either A or B, or both. When I specify AB with the rules "In Folder is A exactly" and "In Folder is B exactly", I get an empty folder, possibly because at the moment no messages are in both. Is the workaround to rename "A" to "A workaround" and "B" to "B workaround" and then specify "AB" with the rule "In Folder contains workaround"? Urggh.

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• Wrong bbox or descent with @font-face and opentype font

  - by wowpatrick

  Hey all, I embedded a opentype font with @font-face. Works fine, but the bbox or descent (or baseline/descent line?) is wrong on certain browsers/OSs. The problem is e.g. on a Mac the bbox is not right, that means to center the text in it's bbox I have to set a padding to the paragraph. I guess the font was created on Windows and was not tested on Linux and OS X, and the font rendering engines in these OSs work diffrently. Any idea how to solve withs problem? Screenshot of the font in Windows, Linux and Mac. Form left to right: Ubuntu Firefox 3, Chromium, Windows XP Firefox 3/Chrome, Mac OS X Safari 5/Firefox 4 Beta 8. Screenshot of the fonts

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• UFW: force traffic thru OpenVPN tunnel / do not leak any traffic

  - by hotzen

  I have VPN access using OpenVPN and try to create a safe machine that does not leak traffic over non-VPN interfaces. Using the firewall UFW I try to achieve the following: Allow Access from LAN to the machine's web-interface Otherwise only allow Traffic on tun0 (OpenVPN-Tunnel interface when established) Reject (or forward?) any traffic over other interfaces Currently I am using the following rules (sudo ufw status): To Action From -- ------ ---- 192.168.42.11 9999/tcp ALLOW Anywhere # allow web-interface Anywhere on tun0 ALLOW Anywhere # out only thru tun0 Anywhere ALLOW OUT Anywhere on tun0 # in only thru tun0 My problem is that the machine is initially not able to establish the OpenVPN-connection since only tun0 is allowed, which is not yet established (chicken-egg-problem) How do I allow creating the OpenVPN connection and from this point onward force every single packet to go thru the VPN-tunnel?

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• Can connect to shared folder on Windows Server 2012, but access denied when accessing

  - by Cylindric

  I have a Windows Server 2012 (non-domain) with a folder that's shared out as TestShare. The share permissions are Everyone has full access, and there is a local user TestUser that has full access to the actual folder. On GuestServer I can connect and/or map a drive to \HostServer\TestShare, specifying the username and password for TestUser. NTFS permissions: Share permissions Effective Access Report The problem is that when I try to access the folder, I get an "access denied" message. On the host server I can see the user connected to the share in the Sessions manager, so the password is correct and being recognised. If I use an incorrect password I don't get the "completed successfully" message, nor the 'open session'. What else can be blocking access to the shared files, when the share seems to be set, and the folder permissions seem to be set, and the connection seems to be okay? The network is recognised as "public", and the relevant firewall rules seem to be enabled - even disabling the firewall doesn't help.

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• Can I use wildcards is puppet package ensure to cover multiple releaseversion

  - by Rob van den Eijnde

  Using puppet I want to update packages on my (CentOS 5 & 6 servers) in a controlled way. Therefore I don't want to use ensure=>latest but rather ensure=>3.0.1-1. Example: class puppet::installation inherits puppet { package { "puppet": ensure => "3.0.1-1", } } The update works alright but puppet agent keeps complaining that there is a difference: /Stage[main]/Puppet::Installation/Package[puppet]/ensure: current_value 3.0.1-1.el6, should be 3.0.1-1 (noop) I can solve this by changing the ensure rule to 3.0.1-1.el6 but than that won't work on CentOS 5. Is there a short/clean way to solve this or do I have to write to seperate, os-releaseversion dependant rules. I have been googling for a solution but didn't find anything pertaining to this particular question. Any suggestion or reference to a relevant example would be appreciated.

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• Blocking a country (mass iP Ranges), best practice for the actual block

  - by kwiksand

  Hi all, This question has obviously been asked many times in many different forms, but I can't find an actual answer to the specific plan I've got. We run a popular European Commercial deals site, and are getting a large amount of incoming registrations/traffic from countries who cannot even take part in the deals we offer (and many of the retailers aren't even known outside Western Europe). I've identified the problem area to block a lot of this traffic, but (as expected) there are thousands of ip ranges required. My question now (finally!). On a test server, I created a script to block each range within iptables, but the amount of time it took to add the rules was large, and then iptables was unresponsive after this (especially when attempting a iptables -L). What is the most efficient way of blocking large numbers of ip ranges: iptables? Or a plugin where I can preload them efficiantly? hosts.deny? .htaccess (nasty as I'd be running it in apache on every load balanced web server)? Cheers

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• Ctrl key is broken on HP Envy is broken, where can I find a replacement

  - by NewProger

  I work as a developer so I have to use key combinations a lot. And I have HP Envy laptop. And the Ctrl key is broken for the second time. First time I just took one from my friend. But I don't have any more friends who are willing to sacrifice their Ctrl key Anyone know where I can find one? (or rather a bunch because they are so weak and low quality) I tried to contact HP support but they did everything to prevent people from doing it. And it is impossible to reach HP support. And in my case where warranty is expired it is not possible at all according to their rules. Also I tried Googling but found nothing

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• Is zip's encryption really bad?

  - by Nifle

  The standard advice for many years regarding compression and encryption has been that the encryption strength of zip is bad. Is this really the case in this day and age? I read this article about WinZip (it has had the same bad reputation). According to that article the problem is removed provided you follow a few rules when choosing your password. At least 12 characters in length Be random not contain any dictionary, common words or names At least one Upper Case Character Have at least one Lower Case Character Have at least one Numeric Character Have at least one Special Character e.g. $,£,*,%,&,! This would result in roughly 475,920,314,814,253,000,000,000 possible combinations to brute force Please provide recent (say past five years) links to back up your information.

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• Programming language for web

  - by cable729

  I haven't programmed in a while, and have kind of lost interest, but I want to get back, and I've enjoyed C# the most, a lot more than objective-c and visual basic. So I want to make some games that me and my friends will be able to play next school year. So basically something you can play on the web. What programming languages deploy to the web? If c# is possible, and a mac with safari/firefox would be able to use it (I can't install plugins, and I don't want to get in trouble for making myself admin again) Flash, Java, etc. If java does, I'd like that most since it's most like c#. Then what libraries/engines would I use? I want to do 2d. And then what IDE would I use? Thanks in advance!

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