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• Systemd-networkd: How can I prepend a static nameserver entry to DHCP-discovered nameservers?

  - by runiq

  I'm using systemd 213 on Arch Linux, and systemd-networkd with DHCP to connect to the internet. I'm also running a caching DNS server on 127.0.0.1. I'd like to make this server the first DNS server in the list, but I'd also like to use the nameservers discovered by systemd-networkd's DHCP facility. Using a static resolv.conf isn't really possible, because I connect to networks with different DNS settings. I know I can set fallback DNS servers in /etc/systemd/resolved.conf, but is there a way with systemd-networkd to prepend my local DNS server to those discovered by DHCP?

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• Selectively routing traffic via ethernet or wifi, with proper DNS (Mac OS X 10.6)

  - by Dan

  When I'm at work, I access various intranet pages as well as the wider Internet through ethernet. However, the company LAN blocks some ports (e.g. Google Calendar). I can get to those through WiFi. So, I gave the Airport priority, and then using route add, I set up selective routing: all intranet traffic goes through the ethernet and everything else via WiFi: sudo route add 10.0.0.0/8 <intranet gateway>. However, there are a number of intranet sites that have their own DNS; i.e., hr.company.com only resolves on the intranet. The only way that I can get the DNS to work properly is to add the internal DNS server to the Airport DNS listing, however I fear that when I go elsewhere and forget, this will break things. What's the right way to get the DNS to resolve using this setup?

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• I have to manually change the DNS suffix order every time I connect to VPN. Can I change this permanently or fix the problem somehow?

  - by CarlB

  Sorry in advance but I'm a programmer, not a network engineer, so I'm a noob at this stuff. Anyway, when I am not connected to VPN from my work PC at home, I have the following DNS suffixes listed (real domain names substituted): enterprise.org network.org company.com us.enterprise.org After connecting to VPN, one more DNS suffix is added to the very top of the list: problem-domain.com At this point, most network functions that I can normally perform when actually connected to the LAN in the office are unusable. I get error messages about the network paths not being found and what-not. Anyway, I played around with the suffixes and realized that if I just moved problem-domain.com down one spot to the second in the list, all the problems went away. Unfortunately, it returns to the top spot every time I reconnect, and I tend to get disconnected frequently. Is there something else I can do about this or should I just contact the IT department? I've had this problem before and they weren't able to resolve it but I suppose it would be worth trying again if I could get a different person on the job. What I don't understand is that I thought it didn't matter what order the suffixes were in? Isn't Windows supposed to go through each suffix until it finds a match (or has gone through all the suffixes)? Why is it quitting after the first one? Thanks in advance.

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• Without using PECL or system() type functions, is there a way to look up DNS records using PHP?

  - by Navarr

  I'm working on creating a new type of email protocol, and in order to do that I had to set up an SRV DNS record for my domain. In promoting this protocol, I'll need to be able to discover if a given host uses my system (and if not fall back to an older protocol). So, is there a way to pull a DNS record (such as SRV) using PHP without using a PECL extension or running it through the linux command line (I already know I can ob_start() and system("host -t SRV hostname") but I'm looking for a better way, if it exists.)

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• The internal storage of a DATETIME2 value

  - by Peter Larsson

  Today I went for investigating the internal storage of DATETIME2 datatype. What I found out was that for a datetime2 value with precision 0 (seconds only), SQL Server need 6 bytes to represent the value, but stores 7 bytes. This is because SQL Server add one byte that holds the precision for the datetime2 value. Start with this very simple repro declare @now datetime2(7) = '2010-12-15 21:04:03.6934231'   select  cast(cast(@now as datetime2(0)) as binary(7)),         cast(cast(@now as datetime2(1)) as binary(7)),         cast(cast(@now as datetime2(2)) as binary(7)),         cast(cast(@now as datetime2(3)) as binary(8)),         cast(cast(@now as datetime2(4)) as binary(8)),         cast(cast(@now as datetime2(5)) as binary(9)),         cast(cast(@now as datetime2(6)) as binary(9)),         cast(cast(@now as datetime2(7)) as binary(9)) Now we are going to copy and paste these binary values and investigate which value is representing what time part. Prefix  Ticks       Ticks         Days    Days    Original value ------  ----------  ------------  ------  ------  -------------------- 0x  00  442801             75844  A8330B  734120  0x00442801A8330B 0x  01  A5920B            758437  A8330B  734120  0x01A5920BA8330B  0x  02  71BA73           7584369  A8330B  734120  0x0271BA73A8330B 0x  03  6D488504        75843693  A8330B  734120  0x036D488504A8330B 0x  04  46D4342D       758436934  A8330B  734120  0x0446D4342DA8330B 0x  05  BE4A10C401    7584369342  A8330B  734120  0x05BE4A10C401A8330B 0x  06  6FEBA2A811   75843693423  A8330B  734120  0x066FEBA2A811A8330B 0x  07  57325D96B0  758436934231  A8330B  734120  0x0757325D96B0A8330B Let us use the following color schema Red - Prefix Green - Time part Blue - Day part What you can see is that the date part is equal in all cases, which makes sense since the precision doesm't affect the datepart. What would have been fun, is datetime2(negative) just like round accepts a negative value. -1 would mean rounding to 10 second, -2 rounding to minute, -3 rounding to 10 minutes, -4 rounding to hour and finally -5 rounding to 10 hour. -5 is pretty useless, but if you extend this thinking to -6, -7 and so on, you could actually get a datetime2 value which is accurate to the month only. Well, enough ranting about this. Let's get back to the table above. If you add 75844 second to midnight, you get 21:04:04, which is exactly what you got in the select statement above. And if you look at it, it makes perfect sense that each following value is 10 times greater when the precision is increased one step too. //Peter

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• The internal storage of a DATETIMEOFFSET value

  - by Peter Larsson

  Today I went for investigating the internal storage of DATETIME2 datatype. What I found out was that for a datetime2 value with precision 0 (seconds only), SQL Server need 6 bytes to represent the value, but stores 7 bytes. This is because SQL Server add one byte that holds the precision for the datetime2 value. Start with this very simple repro declare    @now datetimeoffset(7) = '2010-12-15 21:04:03.6934231 +03:30'   select     cast(cast(@now as datetimeoffset(0)) as binary(9)),            cast(cast(@now as datetimeoffset(1)) as binary(9)),            cast(cast(@now as datetimeoffset(2)) as binary(9)),            cast(cast(@now as datetimeoffset(3)) as binary(10)),            cast(cast(@now as datetimeoffset(4)) as binary(10)),            cast(cast(@now as datetimeoffset(5)) as binary(11)),            cast(cast(@now as datetimeoffset(6)) as binary(11)),            cast(cast(@now as datetimeoffset(7)) as binary(11)) Now we are going to copy and paste these binary values and investigate which value is representing what time part. Prefix  Ticks       Ticks         Days    Days    Suffix  Suffix  Original value ------  ----------  ------------  ------  ------  ------  ------  ------------------------ 0x  00  0CF700             63244  A8330B  734120  D200       210  0x000CF700A8330BD200 0x  01  75A609            632437  A8330B  734120  D200       210 0x0175A609A8330BD200 0x  02  918060           6324369  A8330B  734120  D200       210  0x02918060A8330BD200 0x  03  AD05C503        63243693  A8330B  734120  D200       210  0x03AD05C503A8330BD200 0x  04  C638B225       632502470  A8330B  734120  D200       210  0x04C638B225A8330BD200 0x  05  BE37F67801    6324369342  A8330B  734120  D200       210  0x05BE37F67801A8330BD200 0x  06  6F2D9EB90E   63243693423  A8330B  734120  D200       210  0x066F2D9EB90EA8330BD200 0x  07  57C62D4093  632436934231  A8330B  734120  D200       210  0x0757C62D4093A8330BD200 Let us use the following color schema Red - Prefix Green - Time part Blue - Day part Purple - UTC offset What you can see is that the date part is equal in all cases, which makes sense since the precision doesn't affect the datepart. If you add 63244 seconds to midnight, you get 17:34:04, which is the correct UTC time. So what is stored is the UTC time and the local time can be found by adding "utc offset" minutes. And if you look at it, it makes perfect sense that each following value is 10 times greater when the precision is increased one step too. //Peter

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• Show USB drives in launcher, but not mounted internal partitions

  - by Gabriel

  Well the title pretty much says it all. I have partitions that appear in the launcher when the system mounts them, just like when a USB key is plugged in. I do not want these mounted internal hard disc partitions to show as icons in the launcher, but I do want my external USB to show there when I plug it in. I've tried MyUnity - it has only an option to not show/hide all mounted devices, which is not what I want. Can this be done? From /proc/mounts (in order seen in screenshot): /dev/sdb1 /media/CEDD-DE31 vfat rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=cp437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro 0 0 /dev/sda3 /media/A423-E0E8 vfat rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=cp437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro 0 0 /dev/sda5 /media/586C25656C253EDE fuseblk rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 0 0 /dev/sda6 /home/greg/80gb ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0 Other items from /proc/mounts not appearing in Unity launcher: /dev/sda1 /boot/efi vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0 /dev/sda9 /mnt/backup ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0

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• Transitioning from Internal to Public Speaking

  - by TJB

  For whatever reason, I've always enjoyed giving presentations. As a developer, I've grown from giving the rare presentation when asked to frequently doing 'brown bag' talks and other presentations on new technology, projects etc. I'd like to expand as a presenter and start giving talks in public, outside of just my workplace, and I'm looking for tips on how to get there. At a high level, I'd love to know a good path to take & useful tips to help me grow from just giving internal talks to my group (10-20 people) to eventually be a presenter at medium-large sized conferences. Here are some specific questions, but I will take any advice you can offer: 1. How much experience do I need to speak at user groups etc? I've been in industry for around 5 years, which pales in comparison to most speakers that I normally see. 2. What is a good venue for my 1st public talk? 3. What surprises can I expect when transistioning from speaking to a small group of friends to presenting in public to strangers? I live in southern California and my background is mostly .net / web, so if you have any specific user group / venues those are also greatly appreciated.

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• Pipe an infinite stream to internal loop?

  - by Sh3ljohn

  I've seen a lot of things about redirecting stdout to a TCP socket, but no real example of how to do it in practice, specifically when the output stream generated by the first "command" never ends. To talk about something concrete, let's take programs like servers that typically output their log endlessly to stdout (well, as long as they run). If you redirect the output to a log file on the disk, then this file is always open (therefore not readable by others?) and grows infinitely, which eventually is going to cause problems. This might be a nood question, but I don't know what it does or how to do it so. How to redirect the output of a command to the internal loop? I want to make sure that data is sent EVERY time something is written to stdout, and that the pipe won't wait for the command to end (never happens ideally!). Is that right? If 2 is true, is there a buffer system to send chunks of data once it reaches a certain size only? Could you give me concrete command line examples to do the above? Thanks in advance

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• Custom internal search engine [migrated]

  - by nobody

  I am building a social network, and I need a simple internal search engine that will display a list of all website users starting with the ones that have the specific keyword in their username. So here is what i need: a search engine that will take a keyword. the search engine will open a new page with a list of all website users, displaying first the users that have the specific keyword in their username. display your username in the placeholder. So, here is what I have so far: <div class="logobox r"> <form method="post" action="../sity/search.php"> <!--will redirect you to a new page with a list of all website users.--> <input type="text" class="logo" name="searchUser" placeholder="<?php echo $comObj->getSession('username')?>"> <!--will take a keyword as a imput, and will display your username in the placeholder--> <button type="submit" class="sity" value="sity">sity</button> </form> </div> And here is the searchUser function: function searchUser($keyword) { $commObj = new common; $sql = "SELECT `id`,`username`, `profile_pic` FROM ".$this->tables['user']." WHERE `username` LIKE '%".$keyword."%' AND `id` <> ".$commObj->getSession('userid'); $result = $this->selectAll($sql); unset($this->rsa); return $result; } The problem is that when you click on the search box, instead of letting you to enter a keyword, the page will logout you from the website. I still can't figure out why. Here is the link to the website: www.sity.net Any suggestion will be highly appreciated. Thanks

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• DHCPD (Slackware) - Disabling auto-generation of gateway as DNS server

  - by Dogbert

  Good day, I am using a Linux workstation on Slackware 13.37. One "problem" I have had to deal with ever since 11.0 is the following: DNS servers are queried and determined at startup by DHCP daemon (DHCPD) This is invoked at startup by a script located at /etc/rc.d/rc.dhcpd My DNS servers for my ISP are resolved correctly, and are stored in a list located at /etc/resolv.conf However, the one annoying problem is that my gateway IP (ie: 192.168.1.1) is always automatically put at the top of the list in resolv.conf, meaning I have to always wait for a timeout before a valid DNS server is used to resolve an address (ie: timeout on 192.168.1.1 because it is not actually a DNS server, then DHCP uses the next server in the list). I could lower my DNS resolution timeout so the gateway query times out quicker, but that's not what I want, as I don't want to degrade the abilities of legitimate DNS servers. What I would like to do is change how DHCPD operates so that it does NOT put my gateway IP address at the beginning of this list. I've searched via "man dhcpd", etc, and haven't found the exact answer yet. Any help on this issue is appreciated. Thank you all in advance for your time and assistance.

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• Is domain-transfer inherently safe for downtime when the name servers remain the same?

  - by jlmt

  I've been reading around this topic towards understanding whether there's some or no chance of downtime during an upcoming domain transfer for 15 live and very critical domains. In our case there are three companies involved: CompanyA is the original registrar and DNS host, CompanyB is the new DNS host, and CompanyC is the new registrar. I've already changed the nameservers for all domains to those of CompanyB. We suffered some downtime because CompanyA deleted their hosted DNS for our domains directly after the change, but the changes propagated and we're now able to configure our DNS with CompanyB. From what I understand (please correct where wrong!): There exists an SOA record that points oneofourdomains.com to ns.companyb.com. That record is maintained and authoritatively hosted by the ccTLD registry for the domain (eg. Verisign for .com). CompanyA currently has the ability to change the SOA record because they're the registrar. There exist NS records for oneofourdomains.com, which are also related to the link from domain name to nameserver, are similarly hosted by the ccTLD, and which CompanyA are also able to change while acting as registrar. Neither CompanyB nor CompanyC currently have any control over the SOA or NS records. CompanyA are unable to cause us (DNS) problems during the transfer by dropping service early, because they are not the authoritative source for the SOA and NS records. When we transfer the domains, it's administrative control of the SOA and NS records that will be transferred to CompanyC. As long as we advise CompanyC that the SOA and NS records must not change (as regards pointing to CompanyB's nameservers), there's no need for any kind of DNS change, and therefore no possibility of downtime. Is my understanding of this correct? My fear is that CompanyA will somehow cut us off again, and their support dept hasn't given me much confidence in their understanding of the topic.

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• Compiling JS-Test-Driver Plugin and Installing it on Eclipse 3.5.1 Galileo?

  - by leeand00

  I downloaded the source of the js-test-driver from: http://js-test-driver.googlecode.com/svn/tags/1.2 It compiles just fine, but one of the unit tests fails: [junit] Tests run: 1, Failures: 1, Errors: 0, Time elapsed: 0.012 sec [junit] Test com.google.jstestdriver.eclipse.ui.views.FailureOnlyViewerFilterTest FAILED I am using: - ANT 1.7.1 - javac 1.6.0_12 And I'm trying to install the js-test-driver plugin on Eclipse 3.5.1 Galileo Despite the failed test I installed the plugin into my C:\eclipse\dropins\js-test-driver directory by copying (exporting from svn) the compiled feature and plugins directories there, to see if it would yield any hints to what the problem is. When I started eclipse, added the plugin to the panel using Window-Show View-Other... Other-JsTestDriver The plugin for the panel is added, but it displays the following error instead of the plugin in the panel: Could not create the view: Plugin com.google.jstestdriver.eclipse.ui was unable to load class com.google.jstestdriver.eclipse.ui.views.JsTestDriverView. And then bellow that I get the following stack trace after clicking Details: java.lang.ClassNotFoundException: com.google.jstestdriver.eclipse.ui.views.JsTestDriverView at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:494) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:398) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105) at java.lang.ClassLoader.loadClass(Unknown Source) at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:326) at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:231) at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1193) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:874) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51) at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:267) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:263) at org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:63) at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:324) at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595) at org.eclipse.ui.internal.Perspective.showView(Perspective.java:2229) at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1067) at org.eclipse.ui.internal.WorkbenchPage$20.run(WorkbenchPage.java:3816) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3813) at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3789) at org.eclipse.ui.handlers.ShowViewHandler.openView(ShowViewHandler.java:165) at org.eclipse.ui.handlers.ShowViewHandler.openOther(ShowViewHandler.java:109) at org.eclipse.ui.handlers.ShowViewHandler.execute(ShowViewHandler.java:77) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:294) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169) at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241) at org.eclipse.ui.internal.ShowViewMenu$3.run(ShowViewMenu.java:141) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3880) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3473) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514) at org.eclipse.equinox.launcher.Main.run(Main.java:1311) Additionally, if I go to the settings in Window-Preferences and try to view the JS Test Driver Preferences, I get the following dialog: Problem Occurred Unable to create the selected preference page. com.google.jstestdriver.eclipse.ui.WorkbenchPreferencePage Thank you, Andrew J. Leer

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• Resolving IIS7 HTTP Error 500.19 - Internal Server Error

  - by fatherjack

  LiveJournal Tags: RedGate Tools,SQL Server,Tips and Tricks How To The requested page cannot be accessed because the related configuration data for the page is invalid. As part of my work recently I was moving SQL Monitor from the bespoke XSP web server to be hosted on IIS instead. This didn't go smoothly. I was lucky to be helped by Red Gate's support team (http://twitter.com/kickasssupport). I had SQL Monitor installed and working fine on the XSP site but wanted to move to IIS so I reinstalled the software and chose the IIS option. This wasn't possible as IIS wasn't installed on the server. I went to Control Panel, Windows features and installed IIS and then returned to the SQL Monitor installer. Everything went as planned but when I browsed the site I got a huge error with the message "HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid." All links that I could find suggested it was a permissions issue, based on the directory where the config file was stored. I changed this any number of times and also tried the altering its location. Nothing resolved the error. It was only when I was trying the installation again that I read through the details from Red Gate and noted that they referred to ASP settings that I didn't have. Essentially I was seeing this. I had installed IIS using the default settings and that DOESN'T include ASP. When this dawned on me I went back through the windows components installation process and ticked the ASP service within the IIS role. Completing this and going back to the IIS management console I saw something like this; so many more options! When I clicked on the Authentication icon this time I got the option to not only enable Anonymous Authentication but also ASP.NET Impersonation (which is disabled by default). Once I had enabled this the SQL Monitor website worked without error. I think the HTTP Error 500.19 is misleading in this case and at the very least should be able to recognise if the ASP service is installed or not and then to include a hint that it should be. I hope this helps some people and avoids wasting as much of your time as it did mine. Let me know if it helps you.

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• Multicast hostname lookups on OSX

  - by KARASZI István

  I have a problem with hostname lookups on my OSX computer. According to Apple's HK3473 document it says for v10.6: Host names that contain only one label in addition to local, for example "My-Computer.local", are resolved using Multicast DNS (Bonjour) by default. Host names that contain two or more labels in addition to local, for example "server.domain.local", are resolved using a DNS server by default. Which is not true as my testing. If I try to open a connection on my local computer to a remote port: telnet example.domain.local 22 then it will lookup the IP address with multicast DNS next to the A and AAAA lookups. This causes a two seconds lookup timeout on every lookup. Which is a lot! When I try with IPv4 only then it won't use the multicast queries to fetch the remote address just the simple A queries. telnet -4 example.domain.local 22 When I try with IPv6 only: telnet -6 example.domain.local 22 then it will lookup with multicast DNS and AAAA again, and the 2 seconds timeout delay occurs again. I've tried to create a resolver entry to my /etc/resolver/domain.local, and /etc/resolver/local.1, but none of them was working. Is there any way to disable this multicast lookups for the "two or more label addition to local" domains, or simply disable it for the selected subdomain (domain.local)? Thank you! Update #1 Thanks @mralexgray for the scutil --dns command, now I can see my domain in the list, but it's late in the order: DNS configuration resolver #1 domain : adverticum.lan nameserver[0] : 192.168.1.1 order : 200000 resolver #2 domain : local options : mdns timeout : 2 order : 300000 resolver #3 domain : 254.169.in-addr.arpa options : mdns timeout : 2 order : 300200 resolver #4 domain : 8.e.f.ip6.arpa options : mdns timeout : 2 order : 300400 resolver #5 domain : 9.e.f.ip6.arpa options : mdns timeout : 2 order : 300600 resolver #6 domain : a.e.f.ip6.arpa options : mdns timeout : 2 order : 300800 resolver #7 domain : b.e.f.ip6.arpa options : mdns timeout : 2 order : 301000 resolver #8 domain : domain.local nameserver[0] : 192.168.1.1 order : 200001 Maybe it would work if I could move the resolver #8 to the position #2. Update #2 No probably won't work because the local DNS server on 192.168.1.1 answering for domain.local requests and it's before the mDNS (resolver #2). Update #3 I could decrease the mDNS timeout in /System/Library/SystemConfiguration/IPMonitor.bundle/Contents/Info.plist file, which speeds up the lookups a little, but this is not the solution.

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• WatchGuard 'Internal Policy' intermittently blocking outbound web traffic

  - by vfilby

  I have a lot of legitimate outbound traffic intermittently being denied by WatchGuard's "Internal Policy." Today I tried to go to Splunk's homepage and my traffic was denied by my watchguard XTM 22 with Pro upgrade. What is the "Internal Policy" and what can I do to control it? Example of Traffic being blocked Type Date Action Source IP Port Interface Destination IP Port Policy Traffic 2011-09-21T18:24:43 Deny 10.0.0.90 49627 3-Primary LAN 64.127.105.40 80 Firebox Internal Policy http/tcp Top three firewall policies:

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• What is wrong in my DKIM setup? I'm getting all fails

  - by djechelon

  I own a domain name I have implemented SPF and DKIM to avoid my mails being junked. I have also upgraded to DMARC in monitor mode. Since I received a few failure reports recently I wanted to investigate more. I have only one server sending outbound emails, running postfix + dkimproxy. I trust that dkimproxy has no major software bugs resulting in bad messages. I have tested ReturnPath's automated DKIM test and this is the part related to DKIM/DomainKeys DKIM Results ============ Result = failed: invalid key for signature: Syntax error in tag: \"v Domain = domain.org Selector = sel DNS Record(s) = sel._domainkey.domain.org TXT "v=1; p=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; t=s" Public Key Length = 4096 DomainKeys Results ================== Domain = domain.org Selector = sel DNS Record(s) = sel._domainkey.domain.org TXT "v=1; p=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; t=s" The mail displays an anonymised DNS record with genuine public key. It reports an error in tag v. A few hours ago I noticed my v tag was v=DKIM1 instead of v=1 as specified in RFC. I thought it was an error made by me during the initial setup months ago and fixed to v=1, but anyway I received one DMARC success from Google. Let me explain better: I enforced DMARC a couple of days ago. On 4/16 morning I got a mail from Google telling me that DMARC fully passes, then since 4/17 I get all failures. Then I discovered the v=DKIM1 tag and replaced with v=1 without success I have not modified my DNS records before that. So, keeping in topic with the question, why does ReturnPath refuse my DKIM DNS record? Is something wrong in my DKIM implementation at DNS level? [Add] I have just tried port25.com's tester but at least DKIM passes ---------------------------------------------------------- DomainKeys check details: ---------------------------------------------------------- Result: permerror (DK_STAT_BADKEY: Unusable key, public if verifying, private if signing.) ID(s) verified: header.From=########### DNS record(s): sel._domainkey.domain.org. 1800 IN TXT ""v=1; p=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; t=s"" ---------------------------------------------------------- DKIM check details: ---------------------------------------------------------- Result: pass (matches From: #########) ID(s) verified: header.d=domain.org Canonicalized Headers: message-id:<[email protected]>'0D''0A' date:Thu,'20'18'20'Apr'20'2013'20'11:40:26'20'+0200'0D''0A' from:#############'0D''0A' mime-version:1.0'0D''0A' to:[email protected]'0D''0A' subject:Test'0D''0A' content-type:text/plain;'20'charset=ISO-8859-15;'20'format=flowed'0D''0A' content-transfer-encoding:7bit'0D''0A' dkim-signature:v=1;'20'a=rsa-sha1;'20'c=relaxed;'20'd=domain.org;'20'h='20'message-id:date:from:mime-version:to:subject:content-type'20':content-transfer-encoding;'20's=dom;'20'bh=uoq1oCgLlTqpdDX/iUbLy7J1Wi'20'c=;'20'b= Canonicalized Body: '0D''0A' DNS record(s): sel._domainkey.domain.org. 1800 IN TXT ""v=1; p=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; t=s"" Public key used for verification: sel._domainkey.domain.org (4096 bits)

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• Home-Router: Access internal server using external ip [migrated]

  - by user15863

  If I've got a typical home router -- say a Net Gear -- which has certain ports forwarded to a internal server, is there a way to tweak the router to let me access that internal server using the external IP address from within the same network? Is there a non-enterprise grade router that can handle this type of thing? In case that was strangely worded, let me re-phrase with an example. My external IP is 1.2.3.4. My internal server is 10.4.3.100 Port 1178 is being forwarded from the router to 10.4.3.100. I'd like to be able to be able to hit 10.4.3.100 from an internal ip of 10.4.3.10 by using the external ip of 1.2.3.4. Possible?

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• Internal+external interfaces with multiple default gateways on win2003

  - by fileitup

  Im trying to set up several web servers for a load balanced cluster and need to have each server connected to the internal network (for load balancing) as well as to an external network (internet - for administration). I have two NICs but since I cant set two default gateways I have the external gateway as default and the internal as a route rule. This setup only works half way - the internal network is fine but I cant log in from outside or see the web from the box. If I switch the gateways remote login/web will work, but the internal wont. Im sure someone encountered this before but wasnt able to find anything online. Any help will be appreciated.

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• List Squid's internal ip:port to external ip:port mapping table

  - by joshperry

  I'm assuming that squid keeps a list of internal ip:port that a request is made on and the matching external ip:port that the request is fulfilled with. In the case of a long transfer, such as a file download, it would be nice to be able to see which internal ip:port is downloading the file. I am able to see the traffic and get the external ip:port that squid is using easily with tcpdump or iptraf but I can't find a way to map this back to an internal ip:port.

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• Untangle VPN setup, how to see internal addresses?

  - by NFS user

  So Untangle is setup as the default gateway at 192.168.100.1/24, it is the authorative DHCP server issuing addresses from 192.168.100.100 to 192.168.100.200 and is successfully connected to the Internet. Untangle uses OpenVPN for remote access. Accessing the VPN gives me the address 192.168.40.5. However, I cannot ping any machines on the internal 192.168.100.x network remotely. Clearly, there is something basic that I am missing. What is it and how is it solved? Update: The VPN was not setup with the internal network. Since Untangle only allows editing the VPN setup once, the VPN had to be removed and reinstalled with the internal network exported. Now it works. The lesson is that the internal network must be setup before configuring the VPN.

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• Route multiple subdomains on one external ip to multiple internal ips

  - by Abenil

  i have several subdomains(git.example.org, build.example.org, etc.), i have a router with an external ip and i have several virtual machines on a host computer with internal ips. Now i want to route git.example.org to internal ip 10.0.2.1 and build.example.org to internal ip 10.0.2.2. How can I do this? I setup in the Router that all traffic on port 80 is comming to my host computer with internal ip 10.0.2.3 and installed Squid on that computer. I added the following lines to the squid.conf file: cache_peer 10.0.2.1 parent 80 0 no-query originserver name=server_1 cache_peer_domain server_1 git.example.org cache_peer 10.0.2.2 parent 80 0 no-query originserver name=server_2 cache_peer_domain server_2 build.example.org But this is not working for me. :( Any help appreciated. Regards Nils Update: Here is the solution for Apache http://serverfault.com/a/273693

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• Internal Server Error on HTTPS SSL URL

  - by spike5792

  I am running cPanel/WHM on Apache server and have just installed an SSL certificate for a single domain. Domain/server is on a fixed dedicated IP address. I'm given the 'successfully installed' message when installing the SSL certificate, however when trying to visit the domain using https, the 500 Internal Server Error message appears: The server encountered an internal error or misconfiguration and was unable to complete your request. Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

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• BIND no longer responds to AXFR Requests

  - by djsumdog

  Recently we moved our primary external DNS server. It has three caching DNS slaves in front of it provided by our ISP. They've told us they've started getting access denied requests when doing zone transfers (AXFR). If I add in my own IPs to the allow-transfer list, I also get a transfer failed when using dig with the AXFR argument. Here is what my bind configuration looks like: options { directory "/var/lib/named"; dump-file "/var/log/named_dump.db"; zone-statistics yes; statistics-file "/var/log/named.stats"; listen-on-v6 { any; }; notify-source 10.19.0.68 port 53; querylog yes; notify yes; allow-transfer { 127.0.0.1; //localhost 1.1.1.1; //public dns slave 1 2.2.2.2; //public dns slave 2 3.3.3.3; //public dns slave 3 }; also-notify { 1.1.1.1; //public dns slave 1 2.2.2.2; //public dns slave 2 3.3.3.3; //public dns slave 3 }; include "/etc/named.d/forwarders.conf"; }; logging { channel simple_log { file "/var/log/bind.log" versions 10 size 3m; severity info; print-time yes; print-severity yes; print-category yes; }; category default{ simple_log; }; channel log_zone_transfers { file "/var/log/axfr.log" versions 10 size 3m; print-time yes; print-category yes; print-severity yes; }; category xfer-out { log_zone_transfers; }; channel log_notify { file "/var/log/notify.log" versions 10 size 3m; print-time yes; print-category yes; print-severity yes; }; category notify { log_notify; }; channel queries { file "/var/log/queries.log" versions 10 size 30m; print-time yes; severity info; print-category yes; print-severity yes; }; category queries { queries; }; }; zone "." in { type hint; file "root.hint"; }; zone "localhost" in { type master; file "localhost.zone"; }; zone "0.0.127.in-addr.arpa" in { type master; file "127.0.0.zone"; }; include "/etc/named.conf.include"; zone "example.net " { type master; file "/var/lib/named/master/example.net.hosts"; }; zone "example.com " { type master; file "/var/lib/named/master/example.com.hosts"; }; ## -- other master files -- And the errors in the xfer log look like the following: 29-Oct-2012 14:20:02.806 xfer-out: info: client 1.1.1.1#59069: bad zone transfer request: 'example.com./IN': non-authoritative zone (NOTAUTH) I've tried adding allow-transfer parameters directly on the zone files and still get failed transfers. Any idea what I'm doing wrong?

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• enable email on Godaddy when using Zerigo on Heroku hosted app

  - by joelmaranhao

  A little recap of what I have done ... and then my questions Q1, Q2 and Q3 1 - I developed a RoR app that I deployed on Heroku. biowatts.heroku.com 2 - I bought a domain name at GoDaddy: biowattsonline.com 3 - I am using Zerigo addon as for the DNS heroku addons:add custom_domains heroku addons:add zerigo_dns:basic 4 - Added my domains in Heroku heroku domains:add biowattsonline.com heroku domains:add www.biowattsonline.com and subdomains heroku domains:add calculator.biowattsonline.com Q1: Where do we configure the forward to http://biowattsonline.com/biogas_calculator ? 5 - Configured GoDaddy adding the Zerigo domains In the Nameservers section a.ns.zerigo.net b.ns.zerigo.net c.ns.zerigo.net d.ns.zerigo.net e.ns.zerigo.net The GoDaddy DNS section is empty: "Not hosted here" Ok this works all fine ... http://biowattsonline.com is correctly found 6 - Subdomain forward I want calculator.biowattsonline.com to be forwarded to biowattsonline.com/biogas_calculator Q2: So I created the forward in GoDaddy ... but is that correct? 7 - GoDaddy email Q3: I have one free email account with go GoDaddy, only now that I am using Zerigo I don't know how configure GoDaddy to make it work again?... because it work with the default values Any ideason Q1, Q2 and Q3? Thanks, Joel

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