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• Install GRUB bootloader without installing Linux.

  - by Kavitesh Singh

  I have Windows 7 installed on the system and I want to create a separate WinPe bootable partition which system can fallback when things go wrong. Now Win7 does give this option and i might also edit the BCD store to make changes in the boot menu of Win7 or could use EasyBCD. I dont want to use these options as i need to customize hiding/unhiding of partitions at the time of booting etc. I search and found GRUB might the tool i am looking for. I want to use GRUB loader without any version of Linux installed on the system. Can someone guide me how i can install the GRUB on harddisk MBR and configure the bootmenu. I search internet and mostly i came across commands which search the GRUB on the harddisk because of existing linux installation and then try to repair it. In my case there is no Linux at all. I have Ubuntu 9.10 bootable CD/ OpenSUSE 11.2 liveCD and installation disc. Can i use them to install GRUB on my system?

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• Reverse proxy for mailserver (SMTP + HTTP for web client)

  - by gaqzi

  I'm looking at doing some reverse proxy work for a mail server with corresponding web client. Both servers are running on the same machine, this is not a server with a high load. :) The solution I've discussed with friends is having the mail server/web client on our internal network. Then to put a reverse proxy on the DMZ to service both SMTP and web client HTTP-traffic to the mail server on the internal network. From what I understand this is the recommended secure solution? So far I've thought for the SMTP-proxy part of using postfix which will receive mail, do some spamhause and similar anti-spam measures and if it all checks out, send the mail to the mail server on the inside. The mail server on the inside will send all outgoing mail to the proxy which will then send it out on the Internet. For the web client I'm not sure exactly which software I should be running on the proxy machine, I've been thinking about using Squid -- but that's basically based on the fact that I know squid is a http proxy. The web client data will be sent out over SSL. Reading around some here on Serverfault I've seen other people using Apache with mod_proxy+mod_security for similar situations. Am I thinking correctly for this solution? What software would you guys use and with which modules? Thanks in advance for the help! :)

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• Spreadsheet RDBMS

  - by John Nilsson

  I'm looking for a software (or set of software) that will let me combine spreadsheet and database workflows. Data entry in spreadsheet to enable simple entry from clipboard, analysis based on joins, unions and aggregates and pivot/data pilot summaries. So far I've only found either spreadsheets OR db applications but no good combination. OO base with calc for tables doesn't support aggregates f.ex. Google Spreadsheet + Visualizaion API doesn't support unions or joins, zoho db doesn't let me paste from clipboard. Any hints on software that could be used? Basically I'm trying to do some analysis of my personal bank transactions. Problem 1, ETL. The data has to be moved from my bank to a database. My current solution is to manually copy and paste the data into one spread sheet per account from my internet bank. Pains: Not very scriptable. Lots of scrolling to reach the point to paste. Have to apply sorting and formatting to the pasted data each time. Problem 2, analysis. I then want to aggregate the different accounts in one sweep to track transfers per type of transfer over all accounts. The actual aggregation is still unsolved because I can't find a UNION equivalent in the spreadsheets I've tried.

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• Why Hebrew letters in the address bar break the ARR gateway (Only With Explorer 8,9,10)?

  - by Noamway

  The ARR is working great in all browsers except Internet Explorer 8,9,10. When I paste Hebrew URL directly to the address bar it's working good, but when I surf (click on a simple href URL) from one Hebrew URL page to another Hebrew URL the ARR return me that error: "502 - Web server received an invalid response while acting as a gateway or proxy server." There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server. I checked it number of times including with HTTP analyzer and I saw that the "referer" is making all the problems and cause to that error. For example when I enter to that page: mydomain.com/somehebrewchars (mydomain.com/???? you will need Hebrew install) And click in the page on a link to: mydomain.com/somehebrewchars2 (mydomain.com/???????? you will need Hebrew install) I will get the error above and when you look at the referrer you will see something like that: mydomain.com/עמוד-× ×—×™×ª×” We use other proxies application to others projects and we don't have the same issue like that. For this example we used WIN 2008 and 2012 with ARR 2.5 and also 3 beta. Any help is welcome :-) Thanks, Noam

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• Configuration management in support of scientific computing

  - by Sharpie

  For the past few years I have been involved with developing and maintaining a system for forecasting near-shore waves. Our team has just received a significant grant for further development and as a result we are taking the opportunity to refactor many components of the old system. We will also be receiving a new server to run the model and so I am taking this opportunity to consider how we set up the system. Basically, the steps that need to happen are: Some standard packages and libraries such as compilers and databases need to be downloaded and installed. Some custom scientific models need to be downloaded and compiled from source as they are not commonly provided as packages. New users need to be created to manage the databases and run the models. A suite of scripts that manage model-database interaction needs to be checked out from source code control and installed. Crontabs need to be set up to run the scripts at regular intervals in order to generate forecasts. I have been pondering applying tools such as Puppet, Capistrano or Fabric to automate the above steps. It seems perfectly possible to implement most of the above functionality except there are a couple usage cases that I am wondering about: During my preliminary research, I have found few examples and little discussion on how to use these systems to abstract and automate the process of building custom components from source. We may have to deploy on machines that are isolated from the Internet- i.e. all configuration and set up files will have to come in on a USB key that can be inserted into a terminal that can connect to the server that will run the models. I see this as an opportunity to learn a new tool that will help me automate my workflow, but I am unsure which tool I should start with. If any member of the community could suggest a tool that would support the above workflow and the issues specific to scientific computing, I would be very grateful. Our production server will be running Linux, but support for OS X would be a bonus as it would allow the development team to setup test installations outside of VirtualBox.

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• Configuration management in support of scientific computing

  - by Sharpie

  For the past few years I have been involved with developing and maintaining a system for forecasting near-shore waves. Our team has just received a significant grant for further development and as a result we are taking the opportunity to refactor many components of the old system. We will also be receiving a new server to run the model and so I am taking this opportunity to consider how we set up the system. Basically, the steps that need to happen are: Some standard packages and libraries such as compilers and databases need to be downloaded and installed. Some custom scientific models need to be downloaded and compiled from source as they are not commonly provided as packages. New users need to be created to manage the databases and run the models. A suite of scripts that manage model-database interaction needs to be checked out from source code control and installed. Crontabs need to be set up to run the scripts at regular intervals in order to generate forecasts. I have been pondering applying tools such as Puppet, Capistrano or Fabric to automate the above steps. It seems perfectly possible to implement most of the above functionality except there are a couple usage cases that I am wondering about: During my preliminary research, I have found few examples and little discussion on how to use these systems to abstract and automate the process of building custom components from source. We may have to deploy on machines that are isolated from the Internet- i.e. all configuration and set up files will have to come in on a USB key that can be inserted into a terminal that can connect to the server that will run the models. I see this as an opportunity to learn a new tool that will help me automate my workflow, but I am unsure which tool I should start with. If any member of the community could suggest a tool that would support the above workflow and the issues specific to scientific computing, I would be very grateful. Our production server will be running Linux, but support for OS X would be a bonus as it would allow the development team to setup test installations outside of VirtualBox.

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• Unconvert Text File from Binary Format

  - by Hammer Bro.

  I've got a rather large CSV file (~700MB) which I know to consist of lines of 27-character alpha-numeric hashes; no commas or anything fancy. Somehow, during its migration from Windows to Linux (via winSCP and then a few regular SCPs), it has converted into some kind of binary format I am unfamiliar with. If I open the file in vi, everything appears fine, and it says [converted] at the bottom, although I know it's not a line endings issue (and dos2unix doesn't help). If I 'head' the file, it looks proper except for a "ÿþ" at the beginning of the first line. If I open up the file in nano, however, I see the "ÿþ" at the start and then "^@" before every character (even newlines and EoF). If I try to re-save or copy the file (say via: head file.csv short.txt), this special encoding is preserved. I copied the first ten lines out of vi (which displays it properly) into my Windows clipboard via my SSH client, then pasted it into a new text file, test.txt. This file is visually identical when opened in vi (and similar through 'head', minus the "ÿþ"), although it's roughly half of the filesize. Additionally, file test.txt test.txt: ASCII text file short.txt short.txt: I have no idea what format this once-text file got converted to (it's notoriously hard to search the internet for symbols), but surely there must be some way to convert it back. Any ideas?

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• Overheating computer

  - by Samurai Waffle

  My computer overheats somewhat frequently, usually during intense use. And by intense use I mean browsing the internet while downloading, or gaming. It even overheats on extremely old games though, Master of Orion 2, which was developed for Windows 95. My computer has a Pentium 4 Ghz processor, 2 GB of ram, and is running Windows XP. One of the symptoms it has after overheating, is that it'll turn on immediately afterwards, but won't show any video on my monitor. I usually have to wait at least 5 minutes (mostly at least 10) before I can get it to turn on and show video on my monitor. I also usually have to wiggle around the graphics card a little bit, which is the ASUS A9550 Series with 256 MB. I'm not sure exactly what is causing the computer to overheat. At first I thought it was the video card, but after I noticed it was doing it while playing Master of Orion 2, I'm not so sure, because that game can't be making the video card work all that hard. So how exactly can I pinpoint the problem? Thanks for any help provided. Edit: Okay I downloaded the programs that you specified, and will start benchmarking my system to try and pinpoint what's overheating. What is the temperature range for when it's getting to hot? Also I have an abundant amount of software experience with computers, but unfortunately not to much hardware experience.

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• Cisco ASA intermittently fails to see traffic

  - by DrStalker

  users | Mikrotik -- Internet | ASA | ServerA and ServerB I'm trying to troubleshoot a problem with a new Cisco ASA 5505. The network design is as above - the Microtik is the existing router, ServerA and ServerB used to plug directly into it. ServerA has IP 10.30.1.10, ServerB has IP 10.30.1.11 The ASA is configured with no NAT, a "allow anything" firewall, and uses the microtik as its default gateway. In effect, it is currently a simple IP router; the firewall and VPN stuff will all come later once the basics are working. Th problem is access to ServerA and ServerB is erratic - sometimes it will work, sometimes it will fail. It can fail for either one of the servers only, or both. When it is working: The Mikrotik logs show ping packets being sent out over the proper interface The ASA logs show the incoming connections. When it is failing: The Mikrotik logs show ping packets being sent out over the proper interface The ASA logs show nothing reaching the ASA. This can fail for one server only (e.g.: the Mikrotik is putting out packets to 10.30.1.10 and 10.30.1.11, but the ASA is only seeing packets arrive destined for 10.30.1.11) It can fail for one source only (e.g.: ClientA on the users network can ping 10.30.1.11, but clientB cannot) The problem can also be seen from the mikrotik router itself; sometimes it can ping ServerA and ServerB, sometimes it can only ping one of them What could be causing this? I can't think of any possible cause that is intermittent and could explain why the problem may occur for one destination server and not others. edit: Link to ASA config

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• What is causing random hard freezes on my system? Kaspersky?

  - by Christian Ivicevic

  The last few weeks I experienced a new strange behavior of my computer. Sometimes Windows 7 just freezes with no real reason at all. While listening to music for example the playback hangs and you can hear a very nasty sound. Neither mouse nor keyboard input is handled and everything is just stuck. Using Ubuntu this does not happen, so I think it is just a matter of driver issues or a Windows 7 bug. Furthermore I am really suspicious about Kaspersky (Internet Security 11) and so I let it perform a complete virus scan while no other app is running. At about 50% it happened again and I needed to restart the computer by holding the power button the bad way... A really weird thing is that playing Skyrim this happened once, however music playback did not stop. Only the framerate dropped to 0 and sometimes for a few seconds I am able to move. Therefore I am really confused as furthermore no bluescreen pops up. Memtest told me that everything seems to be alright... Can anyone explain me which data you need about my hardware and software (and which tools tools to use to gather the informatik) to be able to provide any help on my problem?

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• Static routing on a TP-Link TL-WR1043ND

  - by igor

  My home network setup looks like this: Both routers are TP-Link TL-WR1043ND routers. The basement router handles all devices in the house that are connected via cable, handing out addresses for the 10.89.49.0/24 network via DHCP. Wireless doesn’t really work from the basement, as the signal is too weak, so I have disabled it. To do WiFi, I have added a second (identical) router downstairs. On the WAN side it is assigned the 10.89.49.101 IP address from the basement router, and on its LAN it provides the 10.89.7.0/24 network. Basic internet access works flawlessly from any device this way. I am now facing the problem that I am not able to communicate (e.g. SSH) between all devices, wired or wireless. I am able to connect from a wireless device to a wired device, for example SSH-ing from 10.89.7.X to 10.89.49.Y, but it doesn’t work the other way round—despite the fact that I have added a static route to the basement router: Does anybody have any idea on how to solve it? Both routers have already been upgraded to use the most recent firmware from TP-Link.com (Build 110429), to no avail. Errata: I would like to stick with the official firmware, switching to something like DD-WRT or OpenWrt only as a last resort.

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• Same domain only : smtp; 5.1.0 - Unknown address error 530-'SMTP authentication is required

  - by user124672

  I have a very strange problem after moving my netwave.be domain from WebHost4Life to Arvixe. I configured several email adresses, like [email protected] and [email protected]. For POP3 I can use mail.netwave.be, a mailserver hosted by Arvixe. However, for SMTP I have to use relay.skynet.be. Skynet (Belgacom) is one of the biggest internet providers in Belgium and blocks smtp requests to external mailservers. So for years I've been using relay.skynet.be to send my messages using [email protected] as the sender. The worked perfectly. After moving my domain to Arvixe, this is no longer the case. I can send emails to people, no problem. I have received emails too, so I suspect that's ok too. But I can't send emails from one user of my domain to another user. For example, if I send a mail from [email protected] to [email protected], relay.skynet.be picks up the mail just fine. A few seconds later, I get a 'Delivery Status Notification (Failure)' mail that contains: Reporting-MTA: dns; mailrelay012.isp.belgacom.be Final-Recipient: rfc822;[email protected] Action: failed Status: 5.0.0 (permanent failure) Remote-MTA: dns; [69.72.141.4] Diagnostic-Code: smtp; 5.1.0 - Unknown address error 530-'SMTP authentication is required.' (delivery attempts: 0) Like I said, this only seems to be the case when both the sender and recipient are adresses of a domain hosted by Arvixe. I have serveral accounts not related to Arvixe at all. I can use relay.skynet.be to send mail to [email protected] using these accounts. Likewise, I can use relay.skynet.be to send mail from [email protected] to these accounts. but not from one Arvixe account to another. I hope I have clearly outlined the problem and someone will be able to help me.

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• Need Help Accessing the Vista Wampserver localhost from Virtual PC 2007 running an XP VM.

  - by Reg

  (I had posted this on stack overflow but it was suggested there that I post it here instead). I have a Vista laptop on which I'm running wampserver. I have Virtual PC 2007 setup with Windows XP running on the VM. My goal is to be able to use the XP VM to run IE6 to view the localhost in the Vista wampserver. I'm not interested in having the XP VM have any access to the internet -- only to my Vista wampserver's localhost. The vista wampserver works fine. As suggested on a blog I read, I installed the loopback adapter on Vista and I set the loopback to 192.168.21.1 and I set the xp vm ip to 192.168.21.2. I am able to successfully ping the vista-loopback adapter from the xp vm. I've turned the wampserver to "server online", and I've disabled the firewalls in both the vista host and the xp vm. But for some reason, I still can't seem to get the virtual XP to see the localhost on the vista wampserver. I've tried using the vista //name, and I've tried the ip 192.168.21.1 directly and with the port. For whatever its worth, I'm not able to see anything under the XM VM's network places (though I don't know if I'm supposed to be able to see anything). So at this point I'm stuck and I'm still not sure how to get this XP VM to "talk" to my vista wampserver localhost. Any advice on how to fix this problem is much appreciated. Thanks in advance for your help. -R

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• Skype performance in IPSEC VPN

  - by dunxd

  I've been challenged to "improve Skype performance" for calls within my organisation. Having read the Skype IT Administrators Guide I am wondering whether we might have a performance issue where the Skype Clients in a call are all on our WAN. The call is initiated by a Skype Client at our head office, and terminated on a Skype Client in a remote office connected via IPSEC VPN. Where this happens, I assume the trafficfrom Client A (encrypted by Skype) goes to our ASA 5510, where it is furtehr encrypted, sent to the remote ASA 5505 decrypted, then passed to Client B which decrypts the Skype encryption. Would the call quality benefit if the traffic didn't go over the VPN, but instead only relied on Skype's encryption? I imagine I could achieve this by setting up a SOCKS5 proxy in our HQ DMZ for Skype traffic. Then the traffic goes from Client A to Proxy, over the Skype relay network, then arrives at Cisco ASA 5505 as any other internet traffic, and then to Client B. Is there likely to be any performance benefit in doing this? If so, is there a way to do it that doesn't require a proxy? Has anyone else tackled this?

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• DrayTek 2820 configuration using public IP addresses

  - by Kev

  I have a /29 range of public IP addresses assigned to me by my ISP. I'm trying to configure a SIP VOIP handset to register with my VOIP provider who recommend using public IP addresses rather than NAT. I have a DrayTek 2820 router flashed with the latest firmware and have configured my router as per DrayTek's FAQ at: How do I use a public subnet on the LAN (non-NAT operation ) ? My IP range is: xx.xx.94.16 -> xx.xx.94.23 This gives a usable range of: xx.xx.94.17 -> xx.xx.94.22 My router's public IP address is: xx.xx.94.17, the SIP VOIP handset is allocated xx.xx.94.18. I have a second internet connection and via that I can ping the handset. However for some reason I can't seem to get it to register with the provider. I tried adding a new Firewall filter to pass through from WAN to LAN: Source: ANY, Destination: xx.xx.94.18, UDP - Ports 1024 -> 65535 Out of interest I also tried opening port 80 to see if I could browse to the phone's admin web interface but no joy. I know that my ISP aren't blocking inbound service ports because I NAT Port Forwarded port 80 to one of my internal web servers and it rendered a test page I had set up. All the NAT settings are reset to factory defaults, i.e. there are no Port Redirection, DMZ Host, Open Ports or Address Mappings configured. The handset I'm using is a GrandStream GXP-2000. Is there anything else I should be doing?

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• Site to Site VPN with Fault Tolerence

  - by Nordberg

  Hello, I have a situation where I require an IPSEC tunnel between two sites. Site 2 is a small branch office with basic (ADSL) connectivity and Site 1 is the "main" office with SDSL and ADSL for redundancy should the SDSL fail. From Site 1, all traffic bound for the 172.0.0.0 network will then be sent down another IPSEC tunnel to a supplier's Remote Server. See this page for the basic premise (this is a rough idea and things can be moved about etc...) I am considering specifying Cisco ASA devices as the firewalls for both sites for all connections. Would it be possible to employ something like HSRC to provide a backup at Site 1 should the SDSL go down? I suppose the key aims here are that Site 2 can somehow failover to initiate a VPN to the ASA behind the ADSL at Site 1. I will have a 21 subnet mask on all internet connections so can play with Class C routing if need be... If I'm barking up the wrong tree with HSRC, is there another way I can acheive this without massive expenditure on Barracuda routers et al? Many Thanks.

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• Why do (Russian) characters in some received emails change when reading in David InfoCenter?

  - by waszkiewicz

  I'm using David InfoCenter as email Software, and I have troubles with some of my emails in Russian. It's only a few letters, in some emails (sent from different people), like for example the "R" ("P" in russian) will be shown as a "T". In other emails in Russian, the problem doesn't appear. Isn't it strange? Does anyone had the same problem already and found where it came from? When I transmit that email to an external mailbox (internet email account), it's even worse, and gives me symbols instead of all Russian letters... The default encoding was "Russian (ISO)", I changed it to "Russian (Windows)", but same problem. Another weird reaction is when I write an intern email and name it TEST in Russian (????), with ???? in the text window, it changes the title to "Oano"? But the content stays in Russian... With Mailinator I got the following, for message and subject "????": Subject: ???? [..] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_000_00017783.4AF7FB71" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_000_00017783.4AF7FB71 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 0KLQtdGB0YI= ------_=_NextPart_000_00017783.4AF7FB71 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: base64 PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFuc2l0aW9uYWwv L0VOIj4NCjxIVE1MPjxIRUFEPg0KPE1FVEEgaHR0cC1lcXVpdj1Db250ZW50LVR5cGUgY29udGVu dD0idGV4dC9odG1sOyBjaGFyc2V0PXV0Zi04Ij4NCjxNRVRBIG5hbWU9R0VORVJBVE9SIGNvbnRl bnQ9Ik1TSFRNTCA4LjAwLjYwMDEuMTg4NTIiPjwvSEVBRD4NCjxCT0RZIHN0eWxlPSJGT05UOiAx MHB0IENvdXJpZXIgTmV3OyBDT0xPUjogIzAwMDAwMCIgbGVmdE1hcmdpbj01IHRvcE1hcmdpbj01 Pg0KPERJViBzdHlsZT0iRk9OVDogMTBwdCBDb3VyaWVyIE5ldzsgQ09MT1I6ICMwMDAwMDAiPtCi 0LXRgdGCPFNQQU4gDQppZD10b2JpdF9ibG9ja3F1b3RlPjxTUEFOIGlkPXRvYml0X2Jsb2NrcXVv dGU+PC9ESVY+PC9TUEFOPjwvU1BBTj48L0JPRFk+PC9IVE1MPg== ------_=_NextPart_000_00017783.4AF7FB71--

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• Occasional "Could not load file or assembly" in asmx WebService on IIS and DFS

  - by user8804

  We have a handfull of ASMX web service hosted on two identical Windows Server 2003 boxes. The virtual directory for the web services is loaded in a DFS share, both servers point to the same share. We have a load balancer between the internet and the two web servers. At a seemingly random interval (right now about twice per week) when a user tries to access a method on the web service, IIS returns the error: "Could not load file or assembly" for one of the assemblies used in the method call, and will continue reporting it each time the method is called until the app pool is recycled. We haven't found any distinguishable pattern to the problem. This is what I know: the missing assembly varies (but it's always a home-brew assembly) the Web Service method that fails varies there is no noticeable pattern to the times or intervals where the problem appears there are no admin users accessing the servers when the problem appears the failing method will work correctly on one server and fail on the other, even though both point to the same bin folder the problem can always be corrected by recycling the app pool and making no other changes I have enabled the Assembly Binder Log, and know that the binder is looking in the correct location for the file. Our assemblies are compiled for .Net 3.5.

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• Windows 2008 Server cannot access any network share

  - by Ramesh

  Hello friends I run a Windows 2008 server with SP2. This server acts as a desktop alone. Recently, I switched between two networks (corporate and other) using this system. Ever since, I am unable to access any network share on the original network from where I installed and configured the desktop. The message I get is "Network path was not found". Note that I am able to access the internet and my corporate mail server. I am told this is a Vista and Windows 2008 specific problem and I have done everything I could think of: a) Deleted the second network settings from the desktop b) Installed a patch from MS that supposed took care of this problem (with MS clearly saying they had not tested this enough) c) The SP2 install was after the problem occurred and I went ahead with it in the hope that SP2 may have something that would fix this Some additional details: a) A system admin can log into this system from a remote terminal b) I cannot get into my own system using the hidden share C$ - for instance \mymachine\C$ gives me the same message as above - Network path not found c) I can log into my system remotely using mstsc d) I cannot create shares on this system - as an extension network printers are not detected I have an update for you: The error message is as follows - **Network Error** Windows cannot access \\network_share Check the spelling of the name. Otherwise there might a problem with your network. To try to identify and resolve network problems, click Diagnose. Clicking Diagnose gives Error Code: 0x80070035 The network path was not found. Any help will be appreciated Thanks

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• iTunes' clandestine proxy settings

  - by pilcrow

  Problem: One user's iTunes consults a defunct HTTP proxy, but only for iTunes Store HTTP requests -- other iTunes web requests are unproxied. How do I dismiss this spurious proxy setting? Background: It's not as easy as Internet Options. Years ago my network had a mandatory HTTP proxy at 172.31.1.1:8080. When we switched to the 192.168.1/24 space and eliminated the proxy, this user's iTunes -- the only iTunes user at the time -- could no longer contact the iTunes Store, an operation which fails with "unknown error -9808". This has been the case through several iTunes.exe upgrades over the years and prevents, among other things, activation of a new or newly upgraded iPhone. wireshark and TCPView confirm that this user's iTunes.exe is attempting to contact the long-defunct http proxy when attempting to reach the iTunes Store, but is otherwise unproxied. Curious details: No other iTunes.exe HTTP traffic for this user is affected -- iTunes can successfully make HTTP chatter at Apple's servers. No other web traffic at all is proxied, whether this user or others, iTunes or browser, etc. I cannot find the spurious proxy setting anywhere in the registry nor on disk, though perhaps I haven't thought of every place to look and every format to look for. Other users who have experienced the same error code all seem to have unrelated web configuration problems (certificate validation, for example). UPDATE in response to Phoshi's excellent suggestion, reinstallation hasn't done the trick.

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• Windows 8 unable to connect to WPA2 AES Wireless Network

  - by user170193

  I'm running Windows 8 and am unable to connect to my home wireless network. I've tried restarting the router, patching the drivers to the next version, patching the drivers to the last version, running windows update and patching the chipset drivers to the latest version. So far nothing has worked. My computer can get on the internet via USB tethering on my phone or an open WiFi connection, but it is unable to connect to my home WPA2 AES secured wireless network. It sees the network, attempts to connect, gets a limited connection and then drops the connection. All the other wireless devices in my household have no problems. I have the new Dell XPS 12, running Windows 8 using an Intel Centrino Advanced-N 6235 wireless adapter. I've refreshed windows twice now to try different driver configurations. I've tried uninstalling all the Dell software, I've tried uninstalling all the Intel software and reinstalling just the drivers. I've tried turning switching the ability for the Wireless driver to turn the computer off or on. I've tried setting up the connection manually from desktop mode. I've tried switching it on and off using the wireless button on the keyboard and in the software. So far nothing has allowed me to connect to the secured network. It just keeps getting a limited connection, dropping the connection and retrying. It's driving me crazy, any ideas, anything I missed? Thanks.

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• exim4 - disable autoreplies about "SMTP error from remote mail server after RCPT"

  - by osgx

  Hello I have a setup of exim4 on domain1 in front of other server, domain2 (with sendmail). Second server have no direct access to internet, so domain1 is MX for domain2. And domain2 is set as hubbed_host in the exim4 on domain1. When spammer sends message for no_such_user@domain2, its sendmail do a reject: 550 5.1.1 <no_such_user@domain2>... User unknown Then, exim4 at domain1 do an auto-reply like this: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: no_such_user@domain2 SMTP error from remote mail server after RCPT TO:<no_such_user@domain2>: host 10.0.0.1 [10.0.0.1]: 550 5.1.1 <no_such_user@domain2>... User unknown The spammers uses fake "from" field, and such generated messages are frozen by exim for a long time. How can I disable some or all autoreplies from exim4? Ideally, I want a filter, if message was not delivered with error "User unknown" than don't generate any autoreply from mailer-daemon. Thanks!

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• DNAT to 127.0.0.1 with iptables / Destination access control for transparent SOCKS proxy

  - by cdauth

  I have a server running on my local network that acts as a router for the computers in my network. I want to achieve now that outgoing TCP requests to certain IP addresses are tunnelled through an SSH connection, without giving the people from my network the possibility to use that SSH tunnel to connect to arbitrary hosts. The approach I had in mind until now was to have an instance of redsocks listening on localhost and to redirect all outgoing requests to the IP addresses I want to divert to that redsocks instance. I added the following iptables rule: iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 -j DNAT --to-destination 127.0.0.1:12345 Apparently, the Linux kernel considers packets coming from a non-127.0.0.0/8 address to an 127.0.0.0/8 address as “Martian packets” and drops them. What worked, though, was to have redsocks listen on eth0 instead of lo and then have iptables DNAT the packets to the eth0 address instead (or using a REDIRECT rule). The problem about this is that then every computer on my network can use the redsocks instance to connect to every host on the internet, but I want to limit its usage to a certain set of IP addresses only. Is there any way to make iptables DNAT packets to 127.0.0.1? Otherwise, does anyone have an idea how I could achieve my goal without opening up the tunnel to everyone? Update: I have also tried to change the source of the packets, without any success: iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 1.2.3.4 -j SNAT --to-source 127.0.0.1 iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 127.0.0.1 -j SNAT --to-source 127.0.0.1

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• stunnel crashing

  - by Jay

  I'm trying to use stunnel to secure a legacy application's communications. I can't seem to get it setup and working. Can anyone provide any hints where I'm going wrong? Here's what I'm trying to accomplish: A windows service on a client machine connects to a server on port 7000 using TCP. I'd like to encrypt the communication between client and server. Here's what I've tried: Created a new server that accepts ssl connections on port 7443. Got a certificate for the server and installed it. That seems to work with my test setup. Installed stunnel on my windows machine (version 7.43 from the distribution archive file). Installed libssl32.dll and libeay32.dll in the same directory as stunnel.exe ( from the openssl-0.9.8h-1 binary distribution). Installed it as a service using "stunnel -install" Configured stunnel as follows: debug=7 output=C:\p4\internal\Utility\Proxy\proxy.log service=Proxy taskbar=no [exchange] accept=7000 client=yes connect=proxy.blah.com:7443 I changed my hosts file to trick the old application into connecting through stunnel: server.blah.com 127.0.0.1 # when client looks up server it goes to stunnel proxy.blah.com IP-address-of-server.blah.com # stunnel connects to new server "server.blah.com" now resolves to the machine it's running on (i.e. stunnel). "proxy.blah.com" goes to the real server. stunnel should connect to the server. I start the stunnel service and try to connect. It looks like it's working but the stunnel service just shuts down with no message. 2010.04.19 13:16:21 LOG5[4924:3716]: stunnel 4.33 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2010.04.19 13:16:21 LOG5[4924:3716]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2010.04.19 13:16:49 LOG5[4924:3748]: Service exchange accepted connection from 127.0.0.1:4134 2010.04.19 13:16:49 LOG6[4924:3748]: connect_blocking: connecting x.80.60.32:7443 2010.04.19 13:16:49 LOG5[4924:3748]: connect_blocking: connected x.80.60.32:7443 2010.04.19 13:16:49 LOG5[4924:3748]: Service exchange connected remote server from x.253.120.19:4135 2010.04.19 13:20:24 LOG5[3668:3856]: Reading configuration from file stunnel.conf 2010.04.19 13:20:24 LOG7[3668:3856]: Snagged 64 random bytes from C:/.rnd 2010.04.19 13:20:24 LOG7[3668:3856]: Wrote 1024 new random bytes to C:/.rnd 2010.04.19 13:20:24 LOG7[3668:3856]: RAND_status claims sufficient entropy for the PRNG 2010.04.19 13:20:24 LOG7[3668:3856]: PRNG seeded successfully 2010.04.19 13:20:24 LOG7[3668:3856]: SSL context initialized for service exchange 2010.04.19 13:20:24 LOG5[3668:3856]: Configuration successful 2010.04.19 13:20:24 LOG5[3668:3856]: No limit detected for the number of clients 2010.04.19 13:20:24 LOG7[3668:3856]: FD=312 in non-blocking mode 2010.04.19 13:20:24 LOG7[3668:3856]: Option SO_REUSEADDR set on accept socket 2010.04.19 13:20:24 LOG7[3668:3856]: Service exchange bound to 0.0.0.0:7000 2010.04.19 13:20:24 LOG7[3668:3856]: Service exchange opened FD=312 2010.04.19 13:20:24 LOG5[3668:3856]: stunnel 4.33 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2010.04.19 13:20:24 LOG5[3668:3856]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2010.04.19 13:21:02 LOG7[3668:4556]: Service exchange accepted FD=372 from 127.0.0.1:4156 2010.04.19 13:21:02 LOG7[3668:4556]: Creating a new thread 2010.04.19 13:21:02 LOG7[3668:4556]: New thread created 2010.04.19 13:21:02 LOG7[3668:3756]: Service exchange started 2010.04.19 13:21:02 LOG7[3668:3756]: FD=372 in non-blocking mode 2010.04.19 13:21:02 LOG5[3668:3756]: Service exchange accepted connection from 127.0.0.1:4156 2010.04.19 13:21:02 LOG7[3668:3756]: FD=396 in non-blocking mode 2010.04.19 13:21:02 LOG6[3668:3756]: connect_blocking: connecting x.80.60.32:7443 2010.04.19 13:21:02 LOG7[3668:3756]: connect_blocking: s_poll_wait x.80.60.32:7443: waiting 10 seconds 2010.04.19 13:21:02 LOG5[3668:3756]: connect_blocking: connected x.80.60.32:7443 2010.04.19 13:21:02 LOG5[3668:3756]: Service exchange connected remote server from x.253.120.19:4157 2010.04.19 13:21:02 LOG7[3668:3756]: Remote FD=396 initialized 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): before/connect initialization 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 write client hello A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 read server hello A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 read server certificate A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 read server done A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 write client key exchange A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 write change cipher spec A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 write finished A 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 flush data 2010.04.19 13:21:02 LOG7[3668:3756]: SSL state (connect): SSLv3 read finished A The client thinks the connection is closed: No connection could be made because the target machine actively refused it 127.0.0.1:7000 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.Sockets.Socket.Connect(EndPoint remoteEP) at Service.ConnUtility.Connect() Any suggestions?

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• Linux Distro for Beginners

  - by XLR3204S

  Well... I know that's the question arising all over the Internet, but I couldn't find an answer to suit me after googling for quite some time. I'd like to get a Linux distribution, and start learning using the CLI. I'm looking for a distribution already having GNOME installed, as I'll be using Linux-Command.org as my learning resource, and I'm not very familiar with CLI-based web browsers. I'd mainly like to get to know my way around a UNIX-based system, and then I think I'd like to pick up a CLI-only distribution, and start doing more complex stuff. I've tried Ubuntu, Fedora Core, OpenSolaris and FreeBSD (the last two aren't linux distros, I know). Ubuntu and FC are fine, they do come with Firefox, but I'm not really sure they're meant for learning purposes. OpenSolaris was OK as well, but I haven't got to play with it enough. FreeBSD 7.2 did not want to install itself on my 13" MacBook Pro, it generated a kernel panic everytime while copying the files to the disk. So to sum this up, I'm trying to learn Linux, and I'm willing to invest time into this (that is, not giving up when the first problems arise). I also have intermediate knowledge of C++, if it helps, and I'm also using the CLI-vim to write small C++ CLI-based programs, so text editing should be any problem. And... speaking of Macs, how am I going to be limited if I try to learn how to use UNIX-based systems using the OS X Terminal? It uses bash 3.2, isn't this the same shell as the one found on most of the Linux machines? How does the fact that OS X is based on FreeBSD 4.4, if I'm not mistaking, affect this? Thanks in advance, and hopefully, I'll have a starting point ASAP.

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