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• Encryption setup for Linux NAS?

  - by Daniel

  There's a bazillion hard disk encryption HOWTOs, but somehow I can't find one that actually does what I want. Which is: I have a home NAS running Ubuntu, which is being accessed by a Linux and a Win XP client. (Hopefully MacOS X soon...) I want to setup encryption for home dirs on the NAS so that: It does not interfere with the boot process (since the NAS it tucked away in a cupboard), the home dirs should be accessible as a regular file system on the client(s) (e.g. via SMB), it is easy to use by 'normal' people, (so it does not require SSH-ing to the NAS, mount the encrypted partition on command line, then connecting via SMB, and finally umount the partition after being done. I can't explain that to my mom, or in fact to anyone.) does not store the encryption key the NAS itself, encrypts file meta-data and content (i.e. safe against the 'RIAA' attack, where an intruder should not be able to identify which songs are in your MP3 collection). What I hoped to do was use Samba + PAM. The idea was that on connecting to the SMB server, I'd have to enter the password on the client, which sends it to the server for authentication, which would use the password to mount the encrpytion partition, and would unmount it again when the session was closed. Turns out that doesn't really work, because SMB does not transmit the password in the plain and hence I can't configure PAM to use the incoming password to mount the encrypted patition. So... anything I'm overlooking? Is there any way in which I can use the password entered on the client (e.g. on SMB connect) to initiate mounting the encrypted dir on the server?

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• PGB Multipath & return routes

  - by Dennis van der Stelt

  I'm probably a complete n00b concerning serverfault related questions, but our IT department makes a bold statement I wish to verify. I've searched the internet, but can find nothing related to my question, so I come here. We have Threat Management Gateway 2010 and we used to just route the request to IIS and it contained the ip address so we could see where it was coming from. But now they turned on "Requests apear to come the TMG server" so ip addresses aren't forwarded anymore. Every request has the ip of the TMG server. Now the idea behind this is that because of multipath bgp routes, the incoming request goes over RouteA, but the acknowledgement messages could return over RouteB. The claim is that because the request doesn't come from the first known source, our proxy, but instead from IIS, some smart routers at the visitor of our websites don't recognize the acknowledgement message and filter it out. In other words, the response never arrives. Again, this is the claim. But I cannot find ANY resources on the internet that support this claim. I do read about pgb multipath, but more in the case that there are alternative routes when the fastest route fails for some reason. So is the claim completely bogus or is there (some) truth to it? Can someone explain or point me to resources? Thanks in advance!

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• Proper Network Infastructure Setup DMZ, VPN, Routing Hardware Question

  - by NickToyota

  Greetings Server Fault Universe, So here's a quick background. Two weeks ago I started a new position as the systems administrator for an expanding health services company of just over 100 persons. The individual I was replacing left the company with little to no notice. Basically, I have inherited a network of one main HQ (where I am situated) which has existed for over 10 years, with five smaller offices (less than 20 persons). I am trying to make sense of the current setup. The network at the HQ includes: Linksys RV082 Router providing internet access for employees and site to site VPN connecting the smaller offices (using an RV042 each). We have both cable and dsl lines connected to balance traffic (however this does not work at all and is not my main concern right now). Cisco Ironport appliance. This is the main gateway for our incoming and outgoing emails. This also has an external IP and internal IP. Lotus domino in and out email servers connected to the mentioned Cisco gateway. These also have an external IP and internal IP. Two windows 2003 and 2008 boxes running as domain controllers with DNS of course. These also have both an external IP and internal IP. Website and web mail servers also on both external and internal IPs. I am still confused as why there are so many servers connected directly to the internet. I am seriously looking to redesign this setup with proper security practices in mind (my highest concern) and am in need of a proper firewall setup for the external/internal servers along with a VPN solution about 50 employees. Budget is not a concern as I have been given some flexibility to purchase necessary solutions. I have been told Cisco ASA appliance may help. Does anyone out in the Server Fault Universe have some recommendations? Thank you all in advance.

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• Cisco IOS policy route for router originated VPN traffic

  - by Paul

  We have a Cisco IOS router with two DSL connections. One of them is intended for general traffic (ADSL), the other for VPN links (BDSL) and various other traffic. So the default route is the ADSL link, and we have a combination of static routes for the VPN traffic, and policy routes for other traffic types that should go out the BDSL link. For site to site traffic, this is fine, we just static route the public IPs and remote networks out of the BDSL line. The policy based routing works fine for any internal traffic that matches an ACL. The problem is now that there are remote VPN sites originating from dynamic addresses, so we cannot use static routes. The replies to incoming ISAKMP requests are following the default route out of the ADSL (despite there being no crypto map on that interface). I want to route the outgoing VPN traffic out of the BDSL. I have tried adding udp/500 and esp to and from the route-map acl that pushes traffic out of the BDSL line, but it doesn't match, presumably because the route-map happen earlier than the IPSec stuff. Any ideas how I can do this? IOS ver: 12.4.13T.

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• CodePlex Daily Summary for Wednesday, November 30, 2011

  CodePlex Daily Summary for Wednesday, November 30, 2011Popular ReleasesLINQ to Twitter: LINQ to Twitter Beta v2.0.22: New support for Windows Phone 7.1, 100% Twitter API coverage.Anno 2070 Assistant: Anno 2070 Assistant v1.1: Anno 2070 Assistant v1.1 Released! Features Included: Building Layouts for Ecos, Tycoons & Techs Production Chains for Ecos, Tycoons & Techs Supply Calculator New Features: The new supply calculator will tell you how many of each production chain you need to sustain the current population. Simply plot in your total inhabitants of each type and calculate! Coming in v2.0: Population Calculator Port from hard coded data to XML data Calculate by Residence Feature and some more secret ...Rawr: Rawr 4.3.0: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr AddonWe now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including bag and bank items) like Char...BugNET Issue Tracker: BugNET 0.9.131: This is a bug fix release for 0.9 that fixes a number of pressing issues. FixesBGN-1989 - User verification is not working on the latest release BGN-1988 - Send password notification does not include the actual password and throws an error BGN-1987 - Issues revisions stop being updated BGN-1985 - Search by issue id no longer works Fixed issue when user is not authenticated and clicks on the Vote link the user is redirected to page not found (wrong location for the Login.aspx page) N...QuickStart Engine (3D Game Engine for XNA): QuickStart Engine v0.23: Main FeaturesXNA 4.0 compatible Clean engine architecture Makes it easy to make your own game using the engine. Messaging system allows you to communicate between systems and other entities without coupling your code in ways you wouldn't want to. Entity/Component system allows you to make your own objects and customize them very easily. Terrain engine Quad-tree culling Multi-texture splatting Multi-texture normal mapping Smoothing and scaling Physics engine integration Uses Ji...Windows Azure Toolkit for Windows Phone: Windows Azure Toolkit for Windows Phone v1.3.2: Upgraded Windows Azure projects to Windows Azure SDK for .NET – November 2011. Updated BabelCam, CRUDSqlAzure, WPCloud.ACS, and WPCloud.SQL.ACS samples to include default ACS configuration to allow developers running the samples without owning an ACS namespace.VideoLan DotNet for WinForm, WPF & Silverlight 5: VideoLan DotNet for WinForm, WPF, SL5 - 2011.11.29: The new version add and correct many features : Add Medias list property to VlcControl Correction to implement Medias list property Add PlaybackMode property to VlcControl (Loop/Repeat/Default) Remove "--play-and-pause" option in WPF sample Add MediaList Interops Add MediaListPlayer Interops Correction on Interops (error) Add MediaSubItemAdded event on MediaBaseMFCMAPI: November 2011 Release: Build: 15.0.0.1029 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgeWCF Community Site: WCF Web API Preview 6: Welcome to the sixth preview release of WCF Web API on Codeplex! Install WCF Web API Preview 6 using NuGet New Features/EnhancementsURL form encoding - Http request bodies sent as application/x-www-form-urlencoded can now deserialize into objects and participate in content negotiation. Custom OData entity keys - The ODataFormatter now supports custom conventions for determining which properties identify an entity key. [ServiceContract] is no longer required on the Web API class definiti...Devpad: 4.11: Whats new for Devpad 4.11: New Import Archive Improved Save Dialog Improved Replace Dialog Improved Go To Dialog Minor Bug Fix's, improvements and speed upsHome Access Plus+: v7.7: v7.7.1128.2200Added: ShowTo Option on Resources Added: Basic Authentication Logon Method Added: Button on the Live Tracker page to clear logons in the database but not do a remote logoff Updated: jquery from v1.6.2 to v1.7.1 Fixed: Another attempt at fixing the SIMS import in the booking system Fixed: JSON Issues with the Setup Added: More DEBUG Events to the Event Log (note DEBUG not RELEASE) Added: Support for Week A Week B instead of Week 1 and Week 2 Updated: The My Files ...CommonLibrary.NET: CommonLibrary.NET 0.9.8 - Alpha: A collection of very reusable code and components in C# 4.0 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Holiday Calendars, Logging, Authentication, and much more. Samples in <root>\src\Lib\CommonLibrary.NET\Samples CommonLibrary.NET 0.9.8 AlphaNew Dynamic Scripting Language : workitem : 7493 Fixes 1622 6803Widget Suite for DotNetNuke: 01.04.00: The following features/enhancements are associated with this release: Bug: Removed the empty box/white space created by some widgets New Widget: FlexSlider New Widget: Google+ Button New Widget: Klout Badge Sample Widget Script FileFxCop Integrator for Visual Studio 2010: FxCop Integrator 2.0.0 RC: Replaced the MSBuild Tasks installer to fix the bug of the targets file. FxCop Integrator is not affected by this bug. (Nov 28 2011) New FeatureSupported calculating code metrics with Code Metrics PowerTool. (Work Item #6568: 6568). Provided MSBuild tasks. #7454: 7454 Supported to filter out auto-generated code from code analysis result. #7485: 7485 Supported exporting report of code analysis result. Supported multi-project analysis. Supported file level analysis. Added the featu...Terminals: Version 2 - Beta 4 Release: Beta 4 Refresh Build Dont forget to backup your config files BEFORE upgrading! As usual, please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Updated the About form to include the date and time of the build. Useful for CI builds to ensure we have the correct version "Favourites" and "History" save their expanded states after app restarts Code cleanup, secu...MiniTwitter: 1.76: MiniTwitter 1.76 ???? ?? ?????????? User Streams ???????????? User Streams ???????????、??????????????? REST ?????????? ?????????????????????????????? ??????????????????????????????Media Companion: MC 3.424b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movie Show Resolutions... Resolved issue when reverting multiselection of movies to "-none-" Added movie rename support for subtitle files '.srt' & '.sub' Finalised code for '-1' fix - radiobutton to choose either filename or title Fixed issue with Movie Batch Wizard Fanart - ...Advanced Windows Phone Enginering Tool: WPE Downloads: This version of WPE gives you basic updating, restoring, and, erasing for your Windows Phone device.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.37: Fix for issue #16936 - CSS strings containing ASP.NET replacement blocks that contain the same delimiter character(s) as the CSS string cause the CSS parser to barf. Need to use the -aspnet:1 flag to treat the ASP.NET blocks as single entities. Added support for CSS3 @keyframes syntax. Added NuGet package support to the DLL project. Expand the -line switch to also optionally specify the multiline/single line mode, and the spaces-per-tab for multiline mode. Tweak the -pretty switch to be more ...Get simpler, simpler, and simpler: UI 0.1 Binary: Inklude: you can use it with lib, header and dlls. Uzing: you can use it by adding it to your project.New ProjectsArchiveBytes: ArchiveBytes is an archiving solution with rolling archive capabilities. Arduino Controller: Arduino Controller is a GUI to control and arduino wirelessly using: - XBEES - WIFI - Bluetooth All that is required is: - Arduino Controller - Your wireless technology - And an Arduino If you would like info I'm trying to put together sets that include: - Software - Arduino - And a wireless technology (your choice)Artesis - Studiegids MVC: Artesis StudiegidsAzureHost: AzureHost is a synchronization framework that makes it easy to deploy web application files to Windows Azure and keep them synchronized between Web Roles and Blob Storage. AzureHost is a fork of the Windows Azure Accelerator for Umbraco made more simple and generic.Codes Of My ACE Study: Activity-based Center ExpansionCoreGallery.NET: An extensible .NET-based photo gallery. Project has been inactive for some time and currently in very early planning/prototyping stages. Help is definitely welcome!Custom SharePoint Designer Activities for SharePoint 2010: This project adds to the power of SharePoint Designer workflows by adding additional activities that previously were not available including sending emails with attachments, custom from addresses, and much more. Created with visual studio 2010 for SharePoint 2010.Declarative command line parser: A powerful, declarative command-line parsing system in a single .cs file. This file is available as a nuget package (package id: declcmdparser) and can be easily included or excluded in your project.DevCow: This is a location for all of the community projects that help support DevCow.comejg: ejgFibo.Authority: a authority system based on nhibernate,autofac,asp.net MVC,jquery easyui and so on.Georgia Southern House Control: This is a semester project for a group of students at Georgia Southern university.JSAnalyse - Javascript Analyser and Dependency Checker: JSAnalyse - Javascript Analyser and Dependency CheckerLogger - logging for your .NET project using file, mail, debug output: A light weight yet competent logger for .NET with configurable output modules, such as log file, e-mail and debug log. Easy to add your own output module if needed.MetaEdit+ extension for Visual Studio: Visual Studio extension for integrating MetaEdit+ and Visual Studio. This extension allows you to browse MetaEdit+ models and use the main MetaEdit+ functions from Visual Studio. It can also automatically import into Visual Studio the source code generated from MetaEdit+. MonopolyPatrones: Proyecto de patrones de software universidad Javeriana ColombiaMulti-threaded simple Reversi game: XNA Reversi game supporting multi-core processors. NDuplicate: Finds duplicate code (methods) across a C# solution.Netduino-compatible embedded webserver: Embedded Webserver is a small footprint, multi-platform webserver implementation exposing IIS-like API to web enable your hobby project in four easy steps.Orchard UserReviewedItems: An Orchard module extension of the Contrib.Reviews module. Includes a orchard content part for showing the reviews that are written by the user of the current context.PivotViewer Extensions: PivotViewer Extensions is a collection of add-ons to the Silverlight 5 PivotViewer. PowerShell TFS Build Server CmdLets: A set of CmdLets for managing a Team Foundation Server (TFS) Build server through PowerShell. SABON: Simple Access Business Object Network. This is a JavaScript Library that provides quickest way on accessing HTML elements, and DOM this includes Object/Class Creator, Table Effects, Message Box, Object Pop-up, Email Notification, and caseed: Seed creates complete ASP.NET website from object oriented business model definitions. Programers serves programs? No... Programs serves programers, Yep! "Firstly, I think I will build a system with 90% solid functions, and 10% dynamiic functions, the dynamic functions is the flower blossoming from top of it."Sharpshooter: ????OOP??????，??????。Silverlight Front end calling WCF Service in Azure Web Role: I recently written a sample which has Windows Azure Web Role with Silverlight front end, calling to WCF service which is hosted in the same Windows Azure Web Role. SPWikiDialogFix: For SharePoint 2010: Fix to prevent users from receiving ‘The Ribbon Tab with id: "Ribbon.Read" has not been made available for this page or does not exist. Use Ribbon.MakeTabAvailable()’ when viewing wiki pages in dialog mode. For explanation and details, read the blog post at http://blog.furuknap.net/solving-the-ribbon-tab-with-id-ribbon-read-has-not-been-made-available-for-this-page-or-does-not-exist-use-ribbon-maketabavailable Written in C#, because you deserve it.Trinity Christian School Lunches: This is a semester project for a group of students at Georgia Southern University creating a software packages that allows a school to keep track of the lunch orders of students.wp7project: We`re just training...Zavida: C# learning curve.??: fff

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• How to set up a serial connection to a Windows 7 computer

  - by oli_arborum

  I need to set up a "dial in" connection to a Windows 7 (Ultimate) computer via a serial null-modem cable to be able to connect from a Windows XP client to that computer and exchange data over IP. Question 1: How do I do that? I did neither find the information via Google nor in the MSDN. Seems like no one tried ever before... ;-) I already managed to install a legacy modem device called "Communications cable between two computers" and found the menu entry "New Incoming Connection..." in Network and Internet Network Connections. When I finish this wizard I get the message that the "Routing and Remote Access service" cannot be started. In the event viewer I see the following error messages: "The currently configured authentication provider failed to load and initialize successfully. The requested name is valid, but no data of the requested type was found." (Source: RemoteAccess, EventID: 20152) "The Routing and Remote Access service terminated with service-specific error The requested name is valid, but no data of the requested type was found." (Source: Service Control Manager, EventID: 7024) The Windows 7 installation is "naked", i.e. no additional software or services are installed. Question 2: Am I on the right path to set up the connection? Question 3: How can I get the Routing and Remote Access service running?

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• How to populate RRD database with CPU and MEM usage data?

  - by Tomaszs

  I have a Lighttpd server (on Centos) and would like to display 4 graphs: lighttpd traffic, lighttpd requests per second, CPU usage and MEM usage. I've set place for rrd database for lighttpd config like this: rrdtool.binary = "/usr/bin/rrdtool" rrdtool.db-name = "/var/www/lighttpd.rrd" And put into my WWW cgi-bin sh file that gets data from lighttpd RRD file and creates graphs of traffic and requests per second like this: #!/bin/sh RRDTOOL=/usr/bin/rrdtool OUTDIR=//var/www/graphs INFILE=/var/www/lighttpd.rrd OUTPRE=lighttpd-traffic WIDTH=400 HEIGHT=100 DISP="-v bytes --title TrafficWebserver \ DEF:binraw=$INFILE:InOctets:AVERAGE \ DEF:binmaxraw=$INFILE:InOctets:MAX \ DEF:binminraw=$INFILE:InOctets:MIN \ DEF:bout=$INFILE:OutOctets:AVERAGE \ DEF:boutmax=$INFILE:OutOctets:MAX \ DEF:boutmin=$INFILE:OutOctets:MIN \ CDEF:bin=binraw,-1,* \ CDEF:binmax=binmaxraw,-1,* \ CDEF:binmin=binminraw,-1,* \ CDEF:binminmax=binmaxraw,binminraw,- \ CDEF:boutminmax=boutmax,boutmin,- \ AREA:binmin#ffffff: \ STACK:binmax#f00000: \ LINE1:binmin#a0a0a0: \ LINE1:binmax#a0a0a0: \ LINE2:bin#efb71d:incoming \ GPRINT:bin:MIN:%.2lf \ GPRINT:bin:AVERAGE:%.2lf \ GPRINT:bin:MAX:%.2lf \ AREA:boutmin#ffffff: \ STACK:boutminmax#00f000: \ LINE1:boutmin#a0a0a0: \ LINE1:boutmax#a0a0a0: \ LINE2:bout#a0a735:outgoing \ GPRINT:bout:MIN:%.2lf \ GPRINT:bout:AVERAGE:%.2lf \ GPRINT:bout:MAX:%.2lf \ " $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT OUTPRE=lighttpd-requests DISP="-v req --title RequestsperSecond -u 1 \ DEF:req=$INFILE:Requests:AVERAGE \ DEF:reqmax=$INFILE:Requests:MAX \ DEF:reqmin=$INFILE:Requests:MIN \ CDEF:reqminmax=reqmax,reqmin,- \ AREA:reqmin#ffffff: \ STACK:reqminmax#00f000: \ LINE1:reqmin#a0a0a0: \ LINE1:reqmax#a0a0a0: \ LINE2:req#00a735:requests" $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT Basically it's not my script, i get it from somewhere from the internet. Now i would like to do the same for CPU usage and MEM usage. I don't like to use any additional packages! As you can see lighttpd populates lighttpd.rrd file with traffic data and requests per second. Now i would like to the system to populate second rrd file with CPU and MEM usage, so i can add to sh file code to generate graphs for this data. How can I populate RRD file with CPU and MEM usage data? Please, NO THIRD-PARTY tools !

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• Tomcat won't shutdown gracefully -how can I tell if the shutdown port is open?

  - by gav

  Hi, I installed Tomcat 6 using the tar-ball via wget. Startup of the server is fine but on shutdown I get a timeout exception. root@88:/usr/local/tomcat/logs# /usr/local/tomcat/bin/shutdown.sh Using CATALINA_BASE: /usr/local/tomcat Using CATALINA_HOME: /usr/local/tomcat Using CATALINA_TMPDIR: /usr/local/tomcat/temp Using JRE_HOME: /usr Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar 30-Mar-2010 17:33:41 org.apache.catalina.startup.Catalina stopServer SEVERE: Catalina.stop: java.net.ConnectException: Connection timed out at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) ... I read that this might be because I have a firewall blocking incoming connections on the shutdown port (8005). I have a default Ubuntu 9.04 installation running on a VPS with no rules in my iptables. How can I tell if that port is blocked? How can I check that the server is listening for connections on 8005? Bizarrely pinging localhost or the IP of my server fails from the server itself, whereas pinging the IP of my server from another machine succeeds. Gav

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• IPSec for LAN traffic: Basic considerations?

  - by chris_l

  This is a follow-up to my Encrypting absolutely everything... question. Important: This is not about the more usual IPSec setup, where you want to encrypt traffic between two LANs. My basic goal is to encrypt all traffic within a small company's LAN. One solution could be IPSec. I have just started to learn about IPSec, and before I decide on using it and dive in more deeply, I'd like to get an overview of how this could look like. Is there good cross-platform support? It must work on Linux, MacOS X and Windows clients, Linux servers, and it shouldn't require expensive network hardware. Can I enable IPSec for an entire machine (so there can be no other traffic incoming/outgoing), or for a network interface, or is it determined by firewall settings for individual ports/...? Can I easily ban non-IPSec IP packets? And also "Mallory's evil" IPSec traffic that is signed by some key, but not ours? My ideal conception is to make it impossible to have any such IP traffic on the LAN. For LAN-internal traffic: I would choose "ESP with authentication (no AH)", AES-256, in "Transport mode". Is this a reasonable decision? For LAN-Internet traffic: How would it work with the internet gateway? Would I use "Tunnel mode" to create an IPSec tunnel from each machine to the gateway? Or could I also use "Transport mode" to the gateway? The reason I ask is, that the gateway would have to be able to decrypt packages coming from the LAN, so it will need the keys to do that. Is that possible, if the destination address isn't the gateway's address? Or would I have to use a proxy in this case? Is there anything else I should consider? I really just need a quick overview of these things, not very detailed instructions.

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• SCM8014 to FVS338

  - by Jack

  I have a SMC8014 Router/Modem that Comcast provided me with their business class service. It was not filtering malicious traffic as aggressively as I had hoped, so I purchased a NetGear ProSafe FVS338, and put this behind the SMC8014, and all my machines behind that. After some brief configuration, all machines can see out to the internet. I also have a single web server, and I have not been able to configure things so that incoming requests can reach it. This is where I need help! I would like to have the FVS339 do NAT, so that I can assign a 192.168 address to my webserver. I've tried everything I know of, and I can't get things going. I set the SMC8014 to have a LAN facing IP of 10.0.0.1, and I assigned the FVS339 a WAN facing IP of 10.0.0.2. I would like to be able to tell the SMC8014 to just forward all traffic to 10.0.0.2, but I haven't had any success. In my (unfortunately limited) understanding, what I probably want here is a static route, but I don't know how to cofigure one, or if this is really what I want. The SMC8014 wants a Destination IP, a Subnet Mask and a Gateway IP. Any help would be appreciated.

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• Network Load Balancing, intermittent port problem

  - by Jimmy Chandra

  Trying to troubleshoot an intermittent problem. I think it might be related to an NLB issue. We are using Windows Network Load Balancing to balance load for our multiserver SharePoint front ends. Say... Web Front End 1 IP is 192.168.1.100 and Web Front End 2 IP is 192.168.1.101, the NLB is setup to load balance both WFE servers on any incoming traffic to the IP 192.168.1.200. Sometimes we got an intermittent issue where when we try to access the SharePoint site using 192.168.1.200:8080 (say the site is set up to run on port 8080) from a remote client, it will display page not found. Pinging the 192.168.1.200 will give responses, but when trying to telnet to 192.168.1.200:8080 it just won't connect. However, browsing the SharePoint site directly on individual WFE (192.168.1.100 and 192.168.1.101) show no problem whatsoever. My guess also (we didn't get a chance to try it yet, but I think it should work), if I try connecting remotely to individual server, it will respond just fine. But any attempt on trying to connect using the virtual IP (192.168.1.200) will fail miserably. Funny thing is, after a while it will return back to normal. Anyone had similar experience with this type of problem while implementing NLB before? We are doing this in a virtual environment.

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• Apache ProxyPass with SSL

  - by BBonifield

  I have a QA setup that consists of multiple internal development servers and one world-accessible provisioning machine that is setup to proxy pass the web traffic. Everything works fine for non-SSL requests, but I'm having a hard time getting the SSL logic working as well. Here's a few example vhost blocks. <VirtualHost 192.168.168.101:443> ProxyPreserveHost On SSLProxyEngine On ProxyPass / https://192.168.168.111/ ServerName dev1.site.com </VirtualHost> <VirtualHost 192.168.168.101:80> ProxyPreserveHost On ProxyPass / http://192.168.168.111/ ServerName dev1.site.com </VirtualHost> <VirtualHost 192.168.168.101:443> ProxyPreserveHost On SSLProxyEngine On ProxyPass / https://192.168.168.111/ ServerName dev2.site.com </VirtualHost> <VirtualHost 192.168.168.101:80> ProxyPreserveHost On ProxyPass / http://192.168.168.111/ ServerName dev2.site.com </VirtualHost> I end up seeing the following error in the provisioner's error log. [Fri Jan 28 12:50:59 2011] [warn] [client 1.2.3.4] proxy: no HTTP 0.9 request (with no host line) on incoming request and preserve host set forcing hostname to be dev1.site.com for uri / As well as the following entry in the destination QA machine's access log. 192.168.168.101 - - [22/Feb/2011:08:34:56 -0600] "\x16\x03\x01 / HTTP/1.1" 301 326 "-" "-"

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• Nginx multiple upstream servers on the same domain via diferent url

  - by Barry

  Hello. I am trying to rout trafic to different upstream servers (that serve different applications and not for load balancing). The incoming trafic has the same domain name but different URL. Here is an example of my configuration: http { upstream backend1 { server 127.0.0.1:8080 fail_timeout=0; server 127.0.0.1:8081 fail_timeout=0; } upstream backend2 { server 127.0.0.1:8090 fail_timeout=0; server 127.0.0.1:8091 fail_timeout=0; } server { listen 80; server_name my_server.com; root /home/my_server; location /serve_me { fastcgi_pass backend1; include fastcgi_params; } location / { fastcgi_pass backend2; include fastcgi_params; } } } It seems that whatever trafic comes in (including "my_server.com/serve_me") goes to backend2. How do I make queries that start with /serve_me to be directed to backend1? Thanks, Barry.

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• VPN from Windows XP to OpenSwan: correct setup?

  - by Gnudiff

  Main question is what I am doing wrong in my OpenSwan or L2TP client setup? I am trying to create a Linux OpenSwan VPN connection from Windows XP machine, using preshared key and the builtin Windows XP L2TP IPsec option. I have followed the instructions in Linux Home networking Wiki for setting up OpenSwan and a guide to making it work with the Windows XP client, but am now stuck. The net setup is as follows: [my windows client, private IP A]<->[f/wall B]<-internet->[g/w X]<->[Linux OpenSwan server Y] A - private subnet /24 B - internet address X - internet address /24 Y - internet address on same subnet as X What I essentially want is for computer with A address to feel and work, as if it was in X subnet for purposes of outgoing and incoming TCP and UDP connections. My OpenSwan setup is as follows: /etc/ipsec.conf (AAA and YYY indicates ip address parts of A and Y addresses): conn net-to-net authby=secret left=B leftsubnet=AAA.AAA.AAA.0/24 leftnexthop=%defaultroute right=Y rightsubnet=YYY.YYY.YYY.0/24 rightnexthop=B auto=start the secret in /etc/ipsec.secrets is listed as: B Y : PSK "0xMysecretkey" where B & Y stand for respective IP adresses of gateway B and linux server Y My L2TP WinXP setup is: IP of destination: Y don't prompt for username security options: typical, require secured pass, don't require data encryption, IPSec PSK set to 0xMysecretkey networking options: VPN Type: L2TP IPSec VPN; TCPIP protocol (with automatic IP address assignment) and QOS packet schedulers enabled The error I get from Windows client is 789: "error during initial negotiation"

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• What do I need to do to set my computer as Default Gateway?

  - by Vaibhav

  We are trying to put together a box with dual LAN cards (let's say Outer and Inner), where the Inner LAN card is supposed to act as a default gateway on the network it is connected to. This box is running Ubuntu. The basic purpose for this box is to take messages generated on the inner network, do some work with them and forward them out the Outer LAN card to a server. The inner network is completely isolated with simply a regular switch connecting the Inner LAN Card with two other boxes. These other boxes either throw out multi-cast messages (which the Inner LAN Card is listening to), or send out unicast messages meant for the server which is not on this inner network. So, we need the Inner LAN Card to act as a default gateway, where these unicast messages will then be sent, and the code on the dual-LAN Card box can then intercept and forward these messages to the server. Question: 1. How do we setup the LAN Card to be default gateway (does it need some configuration on Ubuntu)? 2. Once we have this setup, is it a simple matter of listening to the interface to intercept the incoming messages? Any help (pointers in the right direction) is appreciated. Thanks.

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• Asterisk terminating outbound call when picked up, sends 'BYE' message

  - by vo

  I'm running Asterisk 1.6.1.10 / FreePBX 2.5.2.2 and I've got an outbound trunk setup. Everything use to work fine until recently (perhaps due to upgrade to FC12 or other things I'm not sure). Anyway the setup does not appear to have issues registering and setting up the call, RTP packets go both ways and you can hear the ringing from the other side. However it appears that when the call is picked up or thereabouts, the incoming RTP packets cease. Upon closer inspection with Wireshark, there are these particular packets that seem to be the cause: trunk->asterisk SIP/SD Status: 200 OK, with session description asterisk->trunk SIP Request: ACK sip:<phone>@trunk:6889 asterisk->trunk SIP Request: BYE sip:<phone>@trunk:6889 [..about a dozzen RTP packets in/outbound..] trunk->asterisk SIP Status: 200 OK, CSeq: 104 Bye [..outbound RTP continues, phone is silent..] Then the inbound RTP packets cease, however the asterisk logs dont show any activity at this point. The last entry reads 'SIP/ is answered SIP/'. Then when you hangup the extension, you get asterisk->trunk SIP Request: BYE sip:<phone>@trunk:6889 trunk->asterisk SIP Status: 481 Call Leg/Transaction does not exist My trunk peer settings in FreePBX are: username=<user> fromuser=<user> canreinvite=no type=friend secret=<pass> qualify=no [qualify yes produces 401/forbidden messages] nat=yes insecure=very host=<sip trunk gateway> fromdomain=<sip trunk gateway> disallow=all context=from-pstn allow=ulaw dtmfmode=inband Under sip_general_custom.conf i have stunaddr=stun.xten.com externrefresh=120 localnet=192.168.1.1/255.255.255.0 nat=yes Whats causing Asterisk to prematurely end the call and still think the call is in progress? I have no idea where to look next.

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• Dynamic fowarding with SOCKS5 proxy [on hold]

  - by bh3244

  I'm building my own SOCKS5 client and HTTP library and am having trouble figuring out how things work with dynamic port forwarding. So far I can connect successfully with my SOCKS5 client, but from there on I am stuck. I am using the ssh -D command. Considering I have my local machine "home" and my server "server" and I wanted to use "server" as proxy for all connections I understand I would type ssh -D "localport" "serverhostname" on my local machine "home". This command I understand has ssh accept connections with the SOCKS5 protocol. So now if I want to connect to google.com(74.125.224.72:80) and issue a GET for the front page, I assume I would send the SOCKS5 client request and the server would respond back with a 0x00 "succeeded" and from then on I am connected and I would send the HTTP GET request and the server would respond back accordingly with the data. Now if I want to navigate to a different website, must I issue another SOCKS5 connection request for that sites IP/hostname? I'm confused if this is the way it is done, or if there is a program listening on the local port of the "server" and handling outgoing and incoming data. To reiterate: Do SOCKS5 proxies work by sending repeated SOCKS5 connection requests for different addresses or is there just one connection to a local port on "server" and another program on "server" handles the outgoing connection to the internet by using that local port to send and receive data to/from "home"?

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• How should I manage VPS email?

  - by Xeoncross

  I have been slowly learning how to run a linux VPS for a while now. Since I build websites I'm confident with running and securing a web server like nginx... or at least there haven't been any casualties yet. However, email scares me. Almost all websites require email to communicate with users. Most of the time email is only needed on my sites during registration as a means of verification. I hardly ever need to accept incoming mail back. Nevertheless, my lack off understanding of how email servers can be abused is worrying me. Not only do you need to secure email servers - you also have to prove to the world that your emails are legit and constantly fight against being blacklisted. Insuring my emails 'good name' is not something I want to devote my life too. What should someone like me do to send emails from my VPS? Should I look for a company to send email through that can worry about this for me? Should I just use google apps until my sites are large enough to worry about? Or is all this just ignorant fear and running your own email server (that actually works) really is easy?

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• Issues installing apache debian

  - by Belgin Fish

  I'm having issues installing apache2, and pretty much everything in general, I'm using debian. I run sudo apt-get install apache2 and then it returns root@debian:~# apt-get install apache2 Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: apache2 : Depends: apache2-mpm-worker (= 2.2.16-6+squeeze7) but it is not going to be installed or apache2-mpm-prefork (= 2.2.16-6+squeeze7) but it is not going to be installed or apache2-mpm-event (= 2.2.16-6+squeeze7) but it is not going to be installed or apache2-mpm-itk (= 2.2.16-6+squeeze7) but it is not going to be installed Depends: apache2.2-common (= 2.2.16-6+squeeze7) but it is not going to be installed E: Broken packages Not really sure what's up :S Seems like it can't find any of the required packages for anything, Anyone know what I'm doing wrong?

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• Google Chrome sync: limit for bookmarks & extensions?

  - by Lyubomyr Shaydariv

  Actually, Chrome is my favorite web-browser, and one of its most powerful features is synchronizing the actual data into a Google account. For the last years I gained a lot of bookmarks and from time to time browse the extensions gallery to find new valuable ones. Really, synchronizing between my work and home PC's freed me from manual sync. And for the recent months I experience strange glitches. I guess it may be caused by a lot of stored bookmarks (potentially about 3K [in estimate], but please don't ask why :)) and extensions (about 130 installed but only 10-15 daily used). I can mention the following strange things: Recently added bookmarks sometimes are not synchronized (e.g. I put a bookmark at work, but it's not guaranteed I can see it that evening), despite about:sync indicates a good sync process. Sometimes recently modified bookmarks appear in either (let's call) last at home or last at work bookmark folders. Sometimes bookmarks are not synced at all. (Moreover, Chromium versions may even crash) Extensions are not synced now at all. Perhaps, there's another reason, but Google Mail Checker and Google Reader Notifier do not show indicators of incoming e-mails and news. ... I'm not sure but it looks like I might exceed Chrome internal sync limits... Is it right? Are there any workarounds, or should I make a massive bookmarks/extensions cleanup (I really don't want it :()? I mostly use Google Chrome Canary builds, and the my current one is 12.0.732.0. Thanks in advance. Update #1 (2001-04-19): I removed about 50 extensions that I'm not interested in (or that I consider as trash), and gained pretty some results: The extensions count is below 100 (exactly 97); The chrome://extensions page does not get slow (or even frozen) any more on enabling/disabling/uninstalling extensions; The extensions are seem to be synchronized now again.

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• Iptables: "-p udp --state ESTABLISHED"

  - by chris_l

  Hi, let's look at these two iptables rules which are often used to allow outgoing DNS: iptables -A OUTPUT -p udp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -p udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT My question is: How exactly should I understand the ESTABLISHED state in UDP? UDP is stateless. Here is my intuition - I'd like to know, if or where this is incorrect: The man page tells me this: state This module, when combined with connection tracking, allows access to the connection tracking state for this packet. --state ... So, iptables basically remembers the port number that was used for the outgoing packet (what else could it remember for a UDP packet?), and then allows the first incoming packet that is sent back within a short timeframe? An attacker would have to guess the port number (would that really be too hard?) About avoiding conflicts: The kernel keeps track of which ports are blocked (either by other services, or by previous outgoing UDP packets), so that these ports will not be used for new outgoing DNS packets within the timeframe? (What would happen, if I accidentally tried to start a service on that port within the timeframe - would that attempt be denied/blocked?) Please find all errors in the above text :-) Thanks, Chris

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• Appears to be "randomly" switching between the acl matched backend and the default backend

  - by Xoor

  I have HAProxy acting as a proxy in front of: An NGinx instance An in-house load balancer in front of multiple dynamic services exposed with socket.io (websockets) My problem is that from time to time my connections are proxied correctly to my socket.io cluster, and then randomly it fallsback to routing to NGinx which obviously is annoying and meaningless since NGinx isn't mean't to handle the request. This happens when requesting for URLs of the format : http://mydomain.com/backends/* There's an ACL in the HAProxy config to match the '/backends/*' path. Here's a simplified version of my HAProxy config (removed extra unrelated entries and changed names): global daemon maxconn 4096 user haproxy group haproxy nbproc 4 defaults mode http timeout server 86400000 timeout connect 5000 log global #this frontend interface receives the incoming http requests frontend http-in mode http #process all requests made on port 80 bind *:80 #set a large timeout for websockets timeout client 86400000 # Default Backend default_backend www_backend # Loadfire (socket cluster) acl is_loadfire_backends path_beg /backends use_backend loadfire_backend if is_loadfire_backends # NGinx backend backend www_backend server www_nginx localhost:12346 maxconn 1024 # Loadfire backend backend loadfire_backend option forwardfor # This sets X-Forwarded-For option httpclose server loadfire localhost:7101 maxconn 2048 It's really quite confusing for me why the behaviour appears to be "random", since being hard to reproduce it's hard to debug. I appreciate any insight on this.

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• I have added a port to the public zone in firewalld but still can't access the port

  - by mikemaccana

  I've been using iptables for a long time, but have never used firewalld until recently. I have enabled port 3000 TCP via firewalld with the following command: # firewall-cmd --zone=public --add-port=3000/tcp --permanent However I can't access the server on port 3000. From an external box: telnet 178.62.16.244 3000 Trying 178.62.16.244... telnet: connect to address 178.62.16.244: Connection refused There are no routing issues: I have a separate rule for a port forward from port 80 to port 8000 which works fine externally. My app is definitely listening on the port too: Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 99 36797 18662/node firewall-cmd doesn't seem to show the port either - see how ports is empty. You can see the forward rule I mentioned earlier. # firewall-cmd --list-all public (default, active) interfaces: eth0 sources: services: dhcpv6-client ssh ports: masquerade: no forward-ports: port=80:proto=tcp:toport=8000:toaddr= icmp-blocks: rich rules: However I can see the rule in the XML config file: # cat /etc/firewalld/zones/public.xml <?xml version="1.0" encoding="utf-8"?> <zone> <short>Public</short> <description>For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description> <service name="dhcpv6-client"/> <service name="ssh"/> <port protocol="tcp" port="3000"/> <forward-port to-port="8000" protocol="tcp" port="80"/> </zone> What else do I need to do to allow access to my app on port 3000? Also: is adding access via a port the correct thing to do? Or should I make a firewalld 'service' for my app instead?

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• Multiple IP's using one NIC connectivity problem - Windows

  - by Vincent

  I have a frame relay network that is directly connected to a GPRS network. I also have a ADSL high speed network and recently I have been trying to achieve the following network configuration using windows 7 (Also tried XP) with no success to date. On one server I have two NIC's NIC1 I would like the following two static IP address's 10.0.1.110 and 10.0.1.200 the cisco router has a default gateway of 10.0.1.1 the ADSL is DHCP. NIC1 and the cisco router do not have access to the internet. NIC2 is setup for DHCP with a primary DNS and secondary DNS configured to enable internet connectivity. With NIC1 all incoming TCP connections are from IP address's starting with 10.192.x.x I cannot establish a TCP connection to both 10.0.1.110 and 10.0.1.200. Its either one or the other. I have a static route implemented in windows of: route -p 10.192.0.0 mask 255.255.0.0 10.0.1.1 metric 1 I have tried leaving out the gateway in the NIC1 and many other combinations with no success. Can anyone please help? What am I doing wrong?

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• Redirect local, not internal, requests using SuSEfirewall2 or an iptables rule

  - by James

  I have a server that is running a web application deployed on Tomcat and is sitting in a test network. We're running SuSE 11 sp1 and have some redirection rules for incoming requests. For example we don't bind port 80 in Tomcat's server.xml file, instead we listen on port 9600 and have a configuration line in SuSEfirewall2 to redirect port 80 to 9640. This is because Tomcat doesn't run as root and can't open up port 80. My web application needs to be able to make requests to port 80 since that is the port it will be using when deployed. What rule can I add so that local requests get redirected by iptables? I tried looking at this question: How do I redirect one port to another on a local computer using iptables? but suggestions there didn't seem to help me. I tried running tcpdump on eth0 and then connecting to my local IP address (not 127.0.0.1, but the actual address) but I didn't see any activity. I did see activity if I connected from an external machine. Then I ran tcmpdump on lo, again tried to connect and this time I saw activity. So this leads me to believe that any requests made to my own IP address locally aren't getting handled by iptables. Just for reference he's what my NAT table looks like now: Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere anywhere tcp dpt:http redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:xfer redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:https redir ports 8443 Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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