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• Puppet Agent fails sporadically, with either timeout or "Could not find class" error

  - by smokris

  I have puppet master running on a Xen dom0, and 3 domUs syncing to it via an hourly crontab puppet agent --test. About 80% of the time, the puppet agent --test completes successfully: info: Retrieving plugin info: Caching catalog for test3 info: Applying configuration version '1333319732' notice: Finished catalog run in 5.08 seconds The other 20% of the time, it fails midway, with errors such as the following: err: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not find class iptables for test1 at /etc/puppet/manifests/site.pp:1 on node test1 warning: Not using cache on failed catalog err: Could not retrieve catalog; skipping run or info: Retrieving plugin info: Caching catalog for test2 info: Applying configuration version '1333319732' notice: Finished catalog run in 24.73 seconds err: Could not send report: Error 500 on SERVER: Internal Server Error private method `gsub' called for WEBrick::HTTPStatus::RequestTimeout:Class WEBrick/1.3.1 (Ruby/1.8.5/2006-08-25) OpenSSL/0.9.8e-rhel5 at puppet:8140 or info: Retrieving plugin err: Could not retrieve catalog from remote server: execution expired warning: Not using cache on failed catalog err: Could not retrieve catalog; skipping run or info: Retrieving plugin info: Caching catalog for test3 info: Applying configuration version '1333319732' notice: Finished catalog run in 9.47 seconds err: Could not send report: Error 408 on SERVER: Request Timeout During this time, I've not made any changes to the Puppet configuration — it just sporadically fails. I'm running puppet-2.7.12 on CentOS, and followed the setup instructions described on http://docs.puppetlabs.com/learning/agent_master_basic.html. Any ideas about how I can troubleshoot this?

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• Setting up multiple servers for one domain

  - by Joseph Torraca

  So I am starting up a new website and I was wondering how to set up 5 servers to host the site. I have already purchased 5 Apple XServes, one will be used as a test server and the other 4 will be for the live site. So I have read some website on the internet and they all reference using one server and installing software onto it and have that server do the load balancing. I have also read that you could use a hardware, rack-mounted system and plug the servers into that. The load balancer would then distribute the load. So I have a few questions about each: 1) How do you set up the software version and have the other servers as "slaves" and have one "master" to direct traffic? 2) Which of the two options above are more reliable, and better suited for a startup that doesn't have many users per month, yet(hopefully)? 3) Is there a theoretical max limit of servers that can be connected to a software load balancing system? Note: Obviously this will change from software to software, but in terms of the server being able to handle it? 4) In your own opinion, what are you using for your sites? Have you had any problems setting up that system or operating it once its running? Are there any things you would stay away from if you had to start over? 5) I also purchased a Apple RAID system, so if you are familiar with it, is there any way to connect it to multiple Xserves so they all serve the same data? I'm a little confused on this, so thanks for all your help and being patient with me. Note: Take it easy on me, I am learning this as I go along, so I may have used terms incorrectly or explained things that don't really make sense. Sorry. P.S. If you need me to supply the specs on the servers to determine which system makes the most sense, I can post them for you.

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• Getting Server 2008 R2 to ignore all traffic from Internet-facing NIC, leaving it to a VM

  - by Wolvenmoon

  I got in to Server 2008 R2 via Dreamspark and would like to start learning on it. I don't have much option but to put it on a system sitting between the Internet and my home LAN due to electricity bills and the fact that 3 computers in an 11x11 space in 102 degree weather is pretty stygian. Currently I use a ClearOS gateway to manage everything, what I'd like to do is take my server 2008 R2 box, which has two NICs, and drop it at the head of my network. I'd want Server 2008 R2 to ignore all traffic on the external facing NIC and pass it to a virtual ClearOS gateway, and to put all its Internet traffic through its other NIC - which will face the rest of my network and be the default gateway for it. The theory is to keep the potentially vulnerable Server 2008 R2 install as tucked behind a Linux box as possible, without sacrificing too much performance. This is a home network that occasionally hosts dedicated game servers and voice chat servers, so most malicious activity is in the form of drive by non-targeted attacks, however, I don't trust Windows Server because I don't know the OS well enough, yet. So, three questions: How do I do this, am I going to be reasonably more secure doing this than if I just let the Server 2008 R2 rig handle all the network traffic and DHCP (not an option), and should I virtualize the Server 2008 R2 rig instead and if so in what? (Core 2 Duo e6600 w/ 5 gigs usable RAM)

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• What is optimal hardware configuration for heavy load LAMP application

  - by Piotr K.

  I need to run Linux-Apache-PHP-MySQL application (Moodle e-learning platform) for a large number of concurrent users - I am aiming 5000 users. By concurrent I mean that 5000 people should be able to work with the application at the same time. "Work" means not only do database reads but writes as well. The application is not very typical, since it is doing a lot of inserts/updates on the database, so caching techniques are not helping to much. We are using InnoDB storage engine. In addition application is not written with performance in mind. For instance one Apache thread usually occupies about 30-50 MB of RAM. I would be greatful for information what hardware is needed to build scalable configuration that is able to handle this kind of load. We are using right now two HP DLG 380 with two 4 core processors which are able to handle much lower load (typically 300-500 concurrent users). Is it reasonable to invest in this kind of boxes and build cluster using them or is it better to go with some more high-end hardware? I am particularly curious how many and how powerful servers are needed (number of processors/cores, size of RAM) what network equipment should be used (what kind of switches, network cards) any other hardware, like particular disc storage solutions, etc, that are needed Another thing is how to put together everything, that is what is the most optimal architecture. Clustering with MySQL is rather hard (people are complaining about MySQL Cluster, even here on Stackoverflow).

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• chef clients behind firewall

  - by tec

  I am currently learning about chef. What I understood so far: I have to install chef-server on an own server or use the hosted chef. I have to install chef-client on the servers that I want to manage aka nodes (manually or using knife bootstrap). I installed several chef tools on my own PC that I can use to manage the nodes, e.g. knife. Now in my case the specialty is that the nodes are behind a firewall/load balancer/proxy. The nodes can access servers on the outside via NAT (http works and I can configure chef-specific hosts to work as well). However they can only be contacted from the outside via a ssh tunnel. There is really much documentation about chef available but I did not find an answer to these questions: When using knife, is it enough when I set up a ssh tunnel manually on my own PC or does the chef server need to contact the nodes? When using knife, can I configure it to setup a ssh tunnel automatically? When using the chef server web ui can I configure it to connect to the nodes via ssh tunnel or do I need a setup where I setup the tunnel myself e.g. using monit? Is this even possible with hosted chef? Instead of using knife or the web ui: Can I issue the same management commands directly on the nodes using chef-client? What solution would you recommend? Thanks a lot for taking your time to help and answering one or more of these related questions

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• deploy LAMP config to new boxes with low/no effort

  - by user1444233

  I'm spending a lot of time setting up new Centos 6 instances. I use a VCS (Subversion) for most of the config files and all of the webapp source files (Github), but even with excellent package managers (like yum, npm, easy_install, etc.) it still takes time. I'd like to get to the point where I could try out a new potential web host by just signing up for an account, logging in and automatically sucking my standardised config onto the box. I know there are a set of tools that can help: Puppet Chef Vagrant and a set of services that sell solutions: [Jumpbox] http://www.jumpbox.com/ [BitNami Cloud] http://bitnami.org/cloud I don't mind investing time in learning a new tool, but as a no-budget start-up, I'm keen to keep monthly costs down. My biggest concern is that time spent on the server config is time away from the codebase, and that's where I think my team and I should be investing our energy, at least until we get funded and scale up a bit. I'd be grateful of some recommendations for which way to jump on config: stick with SSH and manual deploys, at least until you get big. bite the bullet and learn [say] puppet. You may only use it 8-10 times, but it pays to have such an easy tunable server bootstrap. don't bother, just pay the $100/month for a standard config service. It'll cost you $1000/year, but you should focus on the code. Other questions in this domain I use quite a complex stack (Drupal, Zend Server, MySQL, PHP, MongoDB, Python, django), but are there standard(ish) setups that include these or that I could build upon more quickly? Are the configs optimised for small, medium, large VPS (1GB, 4GB, 16GB)? How secure are they?

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• Is On-The-Fly string replacement possible using GreaseMonkey and Firefox

  - by Gary M. Mugford

  I have looked for means to stop Brightcove videos from autostarting in Firefox and have come to the conclusion it isn't possible without external programming via something like Grease Monkey. However, I'm not proficient in javascript let alone GM. So I thought I'd ask here first whether what I want to do is feasible, or whether it's a fool's errand. What I want to accomplish is have a site specific script executed to replace a string value on the run in that site's code. Specifically, what I am looking for is something GM-style that would do this: if site_domain = 'www.SiteWithAutoPlayVideos.com' then replace_all('<param name="autoStart" value="true" />', '<param name="autoStart" value="false" />'); Having looked through Super User for anything GreaseMonkey that might relate, I see notices that the sandbox GM executes scripts in has to remain separate for security reasons. So, I suspect I might be in for disappointment. BUT if it is accomplishable and somebody here can confirm it, then I will do my best to struggle through the learning curve and get this noisome little problem put to rest. Yes, I have tried Flash Block and FlashDisable in order to attack this issue with no avail. Thanks in advance for your time.

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• Customizing user privileges for an account in Windows (xp/vista/7)?

  - by claws

  Hello, I'm a .NET developer and recently learning WINDOWS API. When ever a program starts, my Kaspersky anti-virus says "application belonging to trusted group is trying to set debug previleges". I started wondering what are debug privileges? When ever application tries to open a file (using OpenFileDialog) it gives this message about debug privileges. It sometimes also says the so & so application is trying to read desktop.ini I'm not sure about what exactly it is either. Any way, my concern is about user previlages. When creating user account. We can only set the account to be either Administrative or Limited user. I read in MSDN that there are so many privileges for a user account. http://msdn.microsoft.com/en-us/library/bb530716(VS.85).aspx SE_ASSIGNPRIMARYTOKEN_NAME SE_AUDIT_NAME SE_BACKUP_NAME SE_CHANGE_NOTIFY_NAME SE_CREATE_GLOBAL_NAME SE_CREATE_PAGEFILE_NAME SE_CREATE_PERMANENT_NAME SE_CREATE_SYMBOLIC_LINK_NAME SE_CREATE_TOKEN_NAME SE_DEBUG_NAME SE_ENABLE_DELEGATION_NAME SE_IMPERSONATE_NAME SE_INC_BASE_PRIORITY_NAME SE_INCREASE_QUOTA_NAME SE_INC_WORKING_SET_NAME SE_LOAD_DRIVER_NAME SE_LOCK_MEMORY_NAME SE_MACHINE_ACCOUNT_NAME SE_MANAGE_VOLUME_NAME SE_PROF_SINGLE_PROCESS_NAME SE_RELABEL_NAME SE_REMOTE_SHUTDOWN_NAME SE_RESTORE_NAME SE_SECURITY_NAME SE_SHUTDOWN_NAME SE_SYNC_AGENT_NAME SE_SYSTEM_ENVIRONMENT_NAME SE_SYSTEM_PROFILE_NAME SE_SYSTEMTIME_NAME SE_TAKE_OWNERSHIP_NAME SE_TCB_NAME SE_TIME_ZONE_NAME SE_TRUSTED_CREDMAN_ACCESS_NAME SE_UNDOCK_NAME SE_UNSOLICITED_INPUT_NAME Well, my question is How can I manually (not programatically) set/customize these privileges for a user account? Surprisingly I'm unable to find a PRIVILEGE CONST for registry access. On my lab computer admin has disabled the registry access to my account. Where can I know more information about these information? I use all 3 operating systems (XP, VISTA, 7) :)

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• Mac OS X 10.6.3: how does Apache config work?

  - by w-

  Just got a MacBook Pro 15" so I'm unfamiliar with how the filesystem is laid out. I noticed when in my filesystem that I've got a few paths specifying httpd.conf: /etc/apache2/httpd.conf /opt/local/apache2/conf/httpd.conf /private/etc/apache2/httpd.conf The config files are different in lots of ways (user, group, server_root, modules that are loaded, etc.) The apache2 folders themselves also greatly differ. It seems that the one getting used is either /etc/apache2/httpd.conf or /private/etc/apache2/httpd.conf I'm wondering if I might have messed up my system after installing some packages (php5, django, etc) via macports and maybe ended up with 2 apache2 instances. My questions are hence: which httpd.conf is the one being used ? what are the other files for? thanks --update-- To clarify, I didn't explicitly install apache2 via macports. I'm wondering if it was installed because it was a dependency. After more hunting around I'm learning I never should've installed php to begin with because Snow Leopard already includes php 5.3 from the get go. http://serverfault.com/questions/82410/apache-2-and-php-5-3-via-macports I'll need to open another question that asks about how the Mac filesystem works. Thanks all for replies.

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• Is Windows Server 2008R2 NAP solution for NAC (endpoint security) valuable enough to be worth the hassles?

  - by Warren P

  I'm learning about Windows Server 2008 R2's NAP features. I understand what network access control (NAC) is and what role NAP plays in that, but I would like to know what limitations and problems it has, that people wish they knew before they rolled it out. Secondly, I'd like to know if anyone has had success rolling it out in a mid-size (multi-city corporate network with around 15 servers, 200 desktops) environment with most (99%) Windows XP SP3 and newer Windows clients (Vista, and Win7). Did it work with your anti-virus? (I'm guessing NAP works well with the big name anti-virus products, but we're using Trend micro.). Let's assume that the servers are all Windows Server 2008 R2. Our VPNs are cisco stuff, and have their own NAC features. Has NAP actually benefitted your organization, and was it wise to roll it out, or is it yet another in the long list of things that Windows Server 2008 R2 does, but that if you do move your servers up to it, you're probably not going to want to use. In what particular ways might the built-in NAP solution be the best one, and in what particular ways might no solution at all (the status quo pre-NAP) or a third-party endpoint security or NAC solution be considered a better fit? I found an article where a panel of security experts in 2007 say NAC is maybe "not worth it". Are things better now in 2010 with Win Server 2008 R2?

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• Symantec Endpoint Protection Virus Definitions

  - by Gus Denton

  I have done some Googling but I cannot get a definitive answer certainly not from the Symantec KB. I have a Virtualised Win 2003R2 server 32bit. It has been provisioned to me with Symantec Endpoint Protection 11.0.62xxx CLIENT (not a definitions server) the directory C:\Program Files\Common Files\Symantec Shared\VirusDefs is 750MB IT doesn't contain .tmp directories so it is NOT a corrupt definitions server. IT does contain directories named with a date pattern YYYYMMDD.xxx Some of these folders are 12 months old and I would like to recover the space. The sysmantect forums are full of this stuff but a lot of the postings contain links back to documents that are not specific to End Point Protection Client. It appears that I should be able to delete the older folders and all will be OK. with a service restart however there is a warning about having Live Update Administrator Installed Firstly I have no idea if I have this installed how to I check and secondly can I just ditch these old files and restart ? Regards Gus Denton Learning and Teaching Uni of New South Wales Sydney Australia For those trying to assist me I thankyou. I have followed some instructions found on the Symantec site and assumed that the response from Nixphoe would resolve my issue. It appears that as I am on a provisioned VM from a central IT unit I cannot run the Symantec commands from the Run prompt as my admin creds to get me in. (smc -stop) Basically I need to claw back some Diskspace from the c: drive which is being filed up with WSUS patches and Symantec files. I have managed to delete one symantec cache through the live update control panel and recovered 470Mb I suppose my last question for those more experienced than myself is, can I simply remove say the two oldest virus definition folders without completely foobaring the End Point protection and the server ? Regards Gus

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• Tablet as Car Computer

  - by luxurychair

  Okay, so forward this off to the right place if this isn't the right place to ask this question. I want to use a tablet computer as a car-computer. Minimum features would be to run my music (through iPod, Pandora, whatever I want) and GPS Navigation, watch TV or movies while I'm parked waiting for people, and the hard one: it needs to answer my phone calls with a pleasant interface much like in-dash systems do. It needs to detect that my phone is ringing in my pocket and provide an on-screen answer/ignore and then route the audio through the cars speakers. It would be nice to dial out and have address book access, but that is somewhat secondary. I have an iPhone myself and I figured that an iPad with 3G might make a good system for this - but I'm open to other options if an iPad can't do everything I need. I'm willing to write code, and I'm willing to jailbreak one or both devices. I haven't done much work in Obj-C, but I'm not opposed to learning a new language for this project. It's self enrichment for the most part, as I'm sure I can buy an indash entertainment system for less. Does anyone have experience with the iPhone/iPad SDK that can tell me whether or not it would be possible to get it an iPad to answer my calls in the car? What about an Android tablet? (that Adam looks promising, too).

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• Recommendations for good FTP server for Win 2008 x64

  - by sfhtimssf1970

  I spent a bunch of time learning/configuring the "all new and better" FTP feature for IIS7. In my opinion, it still fails hard: In order to have multiple FTP sites on the same machine, you have to use host|user usernames (like domain.com|jason) for every account. Using IIS Manager auth doesn't seem to work at all. I'm sure I'm doing something wrong, but I can't figure out what the hell it is. I've read all the official articles on it and configured it a hundred different ways. Doesn't play well with passive connection types. That has to be disabled on the client in order for it to work. Doesn't have any way to allow one user to see multiple sites no matter what binding they are connected to. For instance, if "jason" connects to ftp.domain.com, he should be able to see domain2.com, domain3.com without seeing domain4.com and domain5.com. It takes an act of God to set this up with IIS7. So I'm wanting to install a third party FTP server instead. I've looked at FileZilla both ZFTPServer. Anyone know of any pros/cons on these? Any other recommendations?

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• RAID 5 Install on Ubuntu Server 12.04 [closed]

  - by tarabyte

  Environment: Ubuntu Server 12.04, installing from bootable flash drive Error: No root file system is defined. Please correct this from the partitioning menu. I'm trying to set up a personal file server with software RAID 5. I just got three hard drives for this, but haven't found any solid documentation. I'm unsure what the basic way to partition my hard drives is. Can someone upload a screenshot of their "partition disks" screen so that I can compare with mine (attached)? Should I set the bootable flag? Do I need a /home partition? A /boot partition? Should I "Use [my partition] as: Ext4 journaling file system"? Or make that field "physical volume for RAID"? I am an engineer, but I have only a cursory knowledge of all-things-linux. If you know of any good learning resources I'd be happy to hear about those too (that way I don't have to blindly follow deprecated tutorials online). well, image would be here but i don't have a high enough reputation yet (please vote up :)) Thank you, References I've looked into: https://help.ubuntu.com/community/Installation/SoftwareRAID https://help.ubuntu.com/12.04/serverguide/advanced-installation.html http://forevergeeks.com/setup-ubuntu-server-with-raid-5/

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• Need troubleshooting advice for intermittent dns problems with requests on isp nameservers

  - by Mnebuerquo

  I've been having some intermittent dns problems with a web server, where certain isp's dns servers don't have my hostnames in cache and fail to look them up. At the same time, queries to opendns for those hostnames resolve correctly. It's intermittent, and it always works fine for me, so it's hard to identify the problem when someone reports connectivity problems to my site. My website is on a server running linux with Plesk. My dns records are configured with plesk (so my server is its own dns master). Domain name is registered with godaddy. I'm not real knowledgeable about dns, so I don't really know how to begin with troubleshooting. I've started learning to use dig, but while I can read the manpage to learn the syntax, I don't really know what questions to ask. Since the problem is intermittent I haven't been able to really catalog many symptoms. Symptoms I have observed: Certain people repeatedly reported intermittent problems connecting to my website. This was only from certain networks. (Ex: One guy could connect reliably from his office but not his home.) Sometimes I notice my browser taking a long time looking up the hostname for my site (Firefox shows a message in the status bar at the bottom). For me this is in the ten second range. ssh connections from anywhere to my server take a long time to connect but then seem to work fine once connected. So hopefully the folks on serverfault can point me to a good beginner tutorial for understanding dns, and suggest troubleshooting questions to ask next time one of my users reports connectivity problems.

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• Batch copy gives errors, xcopy works fine

  - by ndm13

  I am writing a general file backup program. It searches the drive for files matching a set of types and then writes them to a folder on the desktop. I wrote it using xcopy on Windows XP but upon learning that xcopy was deprecated in favor of robocopy in Vista and newer, still wanting to maintain compatibility I decided to switch to the non-deprecated copy. This is where the problems begin. I'm trying to fix the copy routine. I thought I had everything sorted out, but it doesn't copy anything. My output is zero files copied for every iteration. Original Code using xcopy: for /r %%a in (*.bmp *.dds *.gif *.jpg *.jpeg *.png *.psd *.pspimage *.tga *.thm *.tif *.tiff) do ( echo f | xcopy "%%a" "%HOMEDRIVE%%HOMEPATH%\Desktop\LDR\Images\Bitmap\%%~nxa" /q /y /g /c ) Revised (broken) Code using copy: for /r %%a in (*.bmp *.dds *.gif *.jpg *.jpeg *.png *.psd *.pspimage *.tga *.thm *.tif *.tiff) do ( copy "%%a" "%HOMEDRIVE%%HOMEPATH%\Desktop\LDR\Images\Bitmap\%%~nxa" /d /y /z ) Output: The system cannot find the path specified. 0 files copied. I know that it seems everyone uses either xcopy or robocopy but can anyone help with copy? Note: I'm using Batch to keep it very lightweight and command-line accessible.

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• Mac compatible Web-Development Tools

  - by Derek Adair

  Hi, I'm looking for any Mac compatibile development tools that are tried and tested. I'm quite sick of my MySQL query browser crashing... And i'm sure there is probably better software out there anyways... At the moment my focus is dedicated to application development using PHP/MySQL/Ajax. (although, I will be learning ActionScript/Flex shortly). Here are the apps I regularly use and a general idea of the environment I work in: Hosting - localhost: Mamp Production: Amazon EC2 IDE - Coda: PHP/Mysql/Javascript Mysql - PHPMyAdmin MySQL query browser FTP - Coda FileZilla X11 is used for connecting to my production environment I am mainly looking for... -tools that will help me better manage (create, edit... whatever) databases. -Version control. This is huge as I'm working with a team of three other developers (we reeeeeeaaally need to standardize our environments..) Although any cool little tools to make my job easier are always a plus! I am unable to insert more than one link as I'm not rated on this forum.

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• Hyper-V Virtual Machine Networking issues related to Max Ethernet Frame Size

  - by Goatmale

  I fixed an issue today earlier today but i'm interested in learning WHY it worked. We set up a new Hyper-V virtual machine only to discover that HTTP traffic wasn't working. HTTPS, pings, everything else was working fine. After months of prodding around I took a shot in the dark. On the Hyper-V host server, the physical NIC card had an advanced setting of "Max Ethernet Frame Size" set to 1500. After setting this setting to 1514 the issue was fixed. Alternatively, setting this to 1512 did not solve the issue; 1514 is the magic number. My best guess it that when this setting was set to 1500 it was allowing incoming pings because the data payload was a lot smaller of say, HTTP traffic. As far as HTTPS traffic, I read about something called "Path MTU discovery" which i'm going to assume why is HTTPs traffic was getting through fine, albeit slower. Looking at this post, people agree that 1518 is the max total frame size. Why didn't I need to change this to 1518 instead of 1514 bytes? Why is the default frame size 1500 if that's the max size of the Ethernet payload and not the max size.

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• Linux Sound Drivers - Recompiling kernel with ehcd-hcd module

  - by jhome

  I just installed Linux Mint and I am trying to get my usb soundcard to work. I am completely new to Linux so I have only been learning about all the important parts of the OS this afternoon. No one I know has compiled kernel so I can't ask anyone. I am following instructions on this site: http://wiki.ubuntuusers.de/Benutzer/BigMc#Final-setup-of-US-122L-US-144 "Recompile your Kernel with ehcd-hcd as a module: Instructions for Ubuntu (german) Change "Device Drivers - USB support - EHCI HCD (USB 2.0) support)" to "M" when configuring. Make sure you also install the kernel headers." I know how to do any of these processes. Someone mentioned a package manager. Is recompiling basically in layman's terms reinstallation? Where do I go to the change device drivers? Cheers Edit: I am attempting to be able to use my Tascam US-144 on Linux Mint. Apparently, to use it properly it has to regress to functionality of a former unit (US-122), so according to the instructions a USB port has to be USB 1.0, rather than USB 2.0. I've tried using that ndis** programme for wireless drivers but with no success.

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• GnuPG Command Line - Verifying KeePass Signature

  - by Stisfa

  I'm trying to verify the PGP Signature of the latest version of KeePass 2.14's setup file against this signature, but this is the output I receive: C:\Program Files (x86)\GNU\GnuPG>gpg.exe --verify C:\Users\User\Desktop\KeePass-2.14-Setup.exe gpg: no valid OpenPGP data found. gpg: the signature could not be verified. Please remember that the signature file (.sig or .asc) should be the first file given on the command line. C:\Program Files (x86)\GNU\GnuPG> I found this command here, but it made no mention about ".sig" or ".asc" files, so I figured I did something wrong. By reading (http://www.gnupg.org/documentation/manuals/gnupg/gpgv.html#gpgv), I further tried the following: C:\Program Files (x86)\GNU\GnuPG>gpg.exe --pgpfile C:\Users\User\Desktop\KeePass-2.14-Setup.exe gpg: Invalid option "--pgpfile" C:\Program Files (x86)\GNU\GnuPG> As you can see, the results are quite obfuscating... I took a look at this on SuperUser (http://superuser.com/questions/16160/short-easy-to-understand-explanation-of-gpg-pgp-for-nontechnical-people - I couldn't use "a href" due to the built in spam filter that discriminates against users with < 10 rep; this is the same reason for the link above this link), but none of the links seemed to really address my question, at least not directly enough for me to get any idea on how to move forward on this. Can anybody here help me with the esoteric technicality of OpenPGP & the associated use of the GnuPG program? I've felt pretty dumb learning VBS, but this is beyond humiliating: it's absolutely debilitating and maiming whatever confidence I had with my IT skills (then again, I have no justification for making any boast either, as I have yet to get my A+ Cert, lol).

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• Symantec Endpoint Protection Virus Definitions

  - by Gus Denton

  I have done some Googling but I cannot get a definitive answer certainly not from the Symantec KB. I have a Virtualised Win 2003R2 server 32bit. It has been provisioned to me with Symantec Endpoint Protection 11.0.62xxx CLIENT (not a definitions server) the directory C:\Program Files\Common Files\Symantec Shared\VirusDefs is 750MB IT doesn't contain .tmp directories so it is NOT a corrupt definitions server. IT does contain directories named with a date pattern YYYYMMDD.xxx Some of these folders are 12 months old and I would like to recover the space. The sysmantect forums are full of this stuff but a lot of the postings contain links back to documents that are not specific to End Point Protection Client. It appears that I should be able to delete the older folders and all will be OK. with a service restart however there is a warning about having Live Update Administrator Installed Firstly I have no idea if I have this installed how to I check and secondly can I just ditch these old files and restart ? Regards Gus Denton Learning and Teaching Uni of New South Wales Sydney Australia For those trying to assist me I thankyou. I have followed some instructions found on the Symantec site and assumed that the response from Nixphoe would resolve my issue. It appears that as I am on a provisioned VM from a central IT unit I cannot run the Symantec commands from the Run prompt as my admin creds to get me in. (smc -stop) Basically I need to claw back some Diskspace from the c: drive which is being filed up with WSUS patches and Symantec files. I have managed to delete one symantec cache through the live update control panel and recovered 470Mb I suppose my last question for those more experienced than myself is, can I simply remove say the two oldest virus definition folders without completely foobaring the End Point protection and the server ? Regards Gus

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• Is it possible to install ffmpeg and x264 on a Synology Diskstation 209?

  - by Kieran Benton

  Hi, Complete linux novice here! :) I'm trying to get my brilliant DS209 NAS box to do some transcoding for me of a few AVI videos to a format suitable for my Apply iTouch - yes I could do it with another machine and Handbrake but it would be really useful to offload some of this to the NAS to do overnight. I've managed to install ipkg onto my DS209 NAS box and have played around with installing some packages (binutils, mono, bash etc). I've even managed to install ffmpeg from ipkg and put together the correct command line profile to do the encoding as a .sh file: time ffmpeg -y -i $1 -f mp4 -title $2 -vcodec libx264 -level 21 -s 426×320 -b 512k -bt 512k -bufsize 4M -maxrate 4M -g 250 -coder 0 -threads 0 -acodec libfaac -ac 2 -ab 64k $3 However running this I get a missing dependency on libx264. I've tried building this from the latest source in git, but I get errors during the make process that I just don't understand (way out of my depth). encoder/set.c: In function 'x264_sei_version_write': encoder/set.c:491: error: 'X264_VERSION' undeclared (first use in this function) encoder/set.c:491: error: (Each undeclared identifier is reported only once encoder/set.c:491: error: for each function it appears in.) make: *** [encoder/set.o] Error 1 Can anyone else try building it or give me a pointer as to what I can do to get this going? Its been a good learning experience so far! Thanks.

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• grepping a substring from a grep result

  - by allentown

  Given a log file, I will usually do something like this: grep 'marker-1234' filter_log What is the difference in using '' or "" or nothing in the pattern? The above grep command will yield many thousands of lines; what I desire. Within those lines, There is usually one chunk of data I am after. Sometimes, I use awk to print out the fields I am after. In this case, the log format changes, I can't rely on position exclusively, not to mention, the actual logged data can push position forward. To make this understandable, lets say the log line contained an IP address, and that was all I was after, so I can later pipe it to sort and unique and get some tally counts. An example may be: 2010-04-08 some logged data, indetermineate chars - [marker-1234] (123.123.123.123) from: [email protected] to [email protected] [stat-xyz9876] The first grep command will give me many thousands of lines like the above, from there, I want to pipe it to something, probably sed, which can pull out a pattern within, and print only the pattern. For this example, using an the IP address would suffice. I tried. Is sed not able to understand [0-9]{1,3}. as a pattern? I had to [0-9][0-9][0-9]. which yielded strange results until the entire pattern created. This is not specific to an IP address, the pattern will change, but I can use that as a learning template. Thank you all.

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