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• Is there the equivalent of cloud computing for modems?

  - by morpheous

  I asked this question on SF, and someone recommended that I ask it here - (I don't think I have enough points to move a question from SF to SO - and in any case, I don't know how to do it - so here is the question again): I am interested in the concept of PAAS (platform as a service). However, all talk about SAAS/PAAS seems to focus on only the computer itself - not its peripherals. Is it possible to 'outsource' modems as a resource - so that an app running remotely can pump data to a modem in the cloud? As a bit of background to the question, a group of us are thinking of starting a company that offers similar services to companies like twilio etc - but I want to 'outsource' both the computing hardware (thats PAAS - the easy bit) and the modems (thats what I cant seem to find any info on). Does anyone know if modems can be bundled as part of a PAAS service? - alternatively, is there a way that an application running on one computer can communicate (i.e. pump data) to a remote modem residing on another machine?. I assume I can come up with some protocol over UDP or TCP - but there is no point reinventing the wheel - if such a protocol like that already exists (or if it some open source software allows one to do this). Any suggestions on how to solve this problem?

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• Inconsistent SMTP Access

  - by Mike Hanson

  I have a mail server setup on Windows Server 2008. All was working fine, until I wanted to map a drive on the server so that I can access files on another machine. Windows prompted me to configure Network Discovery, which I did with the "Home/Office" option rather than "Public". After that, several access points that worked before stopped working, like VNC, SMTP, etc. After reinstalling those packages, things appeared to be working again. Unfortunately, problems have returned with my SMTP server. I can use an web-based SMTP tester, and it connects in 62msec (as expected). However, if I telnet from my machine on the same LAN, it takes more than 20 seconds to connect! When I try to send messages from Outlook, it times out entirely with the message: Sending' reported error (0x80042109) : 'Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).' I've checked the firewall settings, I've tried configuring it to use port 587 instead of 25, but nothing gets around this problem. Does any have any useful insights? Thanks in advance!

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• Websockets Server with Fault-Tolerance and Durable Message Store

  - by smitchell360

  I am starting to experiment with websockets. Does anyone know of a websockets server (open source or paid) that provides a durable store of the websocket "channel"? All of the examples that I have found do not address durability -- if a websockets server goes down, all "channel" data is lost. Services such as Pusher do not really discuss whether they address the durability issue (and I have not received a response from tech support yet). Happy to roll my own, but would rather not reinvent the wheel. EDIT: I'm not looking for websockets 101 information. That is readily available and understood. I'm looking for a server (open source or paid) that supports websockets and has a durable store for the websocket data so that, in the event that a server fails, a new server can take over where the original one left off. Two main purposes: 1. support failover scenarios contemplated by the websockets Network Working Group http://tools.ietf.org/html/draft-ibc-websocket-dns-srv-02#section-5.1 (most importantly so that missed messages are sent when a client connects to a failover server) 2. support scenarios where new subscribers must receive all past messages that were published. Of course this can be handled at the application layer...but that is not what I am looking for. EDIT So, after some research the following installed options seem to be the most robust: Kaazing Migratory Migratory (http://migratory.ro) Hosted services that seem "real" Pusher (great API but no history feature yet) PubNub (has history) All of the above services have graceful fallback to other communication methods if websockets are not available. I was not able to find any open source that provided "out of the box" clustering, fail-over, and a durable message store to play back history. There are some projects that may serve as good starting points, but not exactly what I am looking for.

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• open source solution to a gateway for a network of a housing cooperative of 150 people

  - by SirDinosaur

  i just inherited a barely functioning network for a student housing cooperative of about 150 people. in it's current state, as i understand it from the previous person in charge of the network, we have working wireless access points and working ethernet cords going to working gigabit switches going to a barely functioning gateway (right now a simple home router) to one of three possible outbound connections. it is possible to connect to the network through the wireless or ethernet, but especially during peak hours, packets / connections are likely dropped or otherwise get no response. my intuition tells me to replace the gateway with something that can handle multiple outbound connections (WAN) and one inbound connection (LAN), while the rest of the network seems suitable for now. i'm somewhat knowledgable in Linux (been using Debian after first Arch Linux) and i want to use as much open source as possible, but i'm confused whether or not a simple server that i could easily understand will work for this situation. do i need specialized hardware to handle the switching more effectively? if so, what are my options? (i found this, thoughts?) or if a Debian server would work, anything else i should about the specs required for this type of server? also links to any useful information on using open source to maintain this type of network would be most appreciated. <3 P.S. crossposted http://redd.it/yybp2.

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• How to configure IIS 7.5 to allow special chars in Url for ASP.NET 3.5?

  - by Sebastian P.R. Gingter

  I'm trying to configure my IIS 7.5 to allow specials chars in the url for ASP.NET. This is important to support wide-spread legacy url's on a new system. Sample url: http://mydomain.com/FileWith%inTheName.html This would be encoded in the url and requested as http://mydomain.com/FileWith25%inTheName.html This simply works, when creating a new web in IIS 7.5, placing a file with the percentage sign in the file name in the web root and pointing the browser to it. This does not work, however, when the web site is an ASP.NET application. ASP.NET always returns a 400.0 - Bad Request error in the WindowsAuthentication module from the StaticFile handler, when pointing to that url. It however displays the requested url correctly and also resolves correctly to the correct physical file (the information from the field 'Physical Path' from the Server error page points to the physically available file). There are hints on how to enable this, so I followed the instructions on these websites step by step: http://dirk.net/2008/06/09/ampersand-the-request-url-in-iis7/ http://adorr.net/2010/01/configure-iis-to-accept-url-with-special-characters.html The second one actually sums up the information from the first post and adds some more information about x64 systems (we're running x64) and on an additional web.config change for this. I tried all that, and still can't get this running from an asp.net web application. And yes: I rebooted after applying the registry changes. So, what do I have to do in addition to the settings described in above posts, to support the legacy url's which contain percentage characters? Additional info: Application Pool mode is integrated. Push after some days. No idea anyone?

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• Prevent master to fall back to master after failure

  - by Chrille

  I'm using keepalived to setup a virtual ip that points to a master server. When a failover happens it should point the virtual ip to the backup, and the IP should stay there until I manually enable (fix) the master. The reason this is important is that I'm running mysql replication on the servers and writes should only be on the master. When I failover I promote the slave to master. The master server: global_defs { ! this is who emails will go to on alerts notification_email { [email protected] ! add a few more email addresses here if you would like } notification_email_from [email protected] ! I use the local machine to relay mail smtp_server 127.0.0.1 smtp_connect_timeout 30 ! each load balancer should have a different ID ! this will be used in SMTP alerts, so you should make ! each router easily identifiable lvs_id APP1 } vrrp_instance APP1 { interface eth0 state EQUAL virtual_router_id 61 priority 999 nopreempt virtual_ipaddress { 217.x.x.129 } smtp_alert } Backup server: global_defs { ! this is who emails will go to on alerts notification_email { [email protected] ! add a few more email addresses here if you would like } notification_email_from [email protected] ! I use the local machine to relay mail smtp_server 127.0.0.1 smtp_connect_timeout 30 ! each load balancer should have a different ID ! this will be used in SMTP alerts, so you should make ! each router easily identifiable lvs_id APP2 } vrrp_instance APP2 { interface eth0 state EQUAL virtual_router_id 61 priority 100 virtual_ipaddress { 217.xx.xx.129 } notify_master "/etc/keepalived/notify.sh del app2" notify_backup "/etc/keepalived/notify.sh add app2" notify_fault "/etc/keepalived/notify.sh add app2” smtp_alert }

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• How do I fix Internet Explorer / Firefox differences in Oracle JD Edwards Enterprise?

  - by CT

  Our company uses Oracle's JD Edwards Enterprise to do accounting work. We have an application consultant working for us to just deal JD Edwards but he is of non-technical background so only helps in application-specific support. All of our users should use IE 7 for JDE. About 15-20% of those users have problems which cause them to not be able to use IE 7. So those problematic users use firefox. For the most part firefox works fine but there are a few issues. Some menus / options within JDE that are present in IE 7 are not present in firefox. If I could get all of our users working under IE 7, all the firefox issues would be mute points. I have cross referenced Internet Options settings from a working IE 7 user and a non-working IE 7 user. All settings seem to be mirrored. I'm not sure how to go about continuing to troubleshoot this issue. So not only answers but just suggestive ideas for attack would be appreciated. Thanks

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• Gvim on Windows 7: ALT codes not working

  - by John Sonderson

  I would like to be able to enter ALT codes in Gvim on Windows 7 as documented on the following site: Alt Codes On Windows (Windows 7 in my case), to generate a character via an ALT code you make sure that the NumLock key on your keypad is toggled on, hold down the ALT key, enter the keycode on the numeric keypad, and then release the ALT key. However this does not work in Gvim on Windows (which ignores the fact that I am pressing the ALT key and just prints to entered keypad key directly onto the screen). How can I get these keystroke combinations to work in Gvim as well? Thanks. EDIT: As the answer below points out, the way to insert non-ASCII characters for which you do not have entries on your keyboard without changing the keyboard layout is as follows: Make sure you are in insert mode, and then type CTRL-V followed by the Unicode character code of interest, for instance: CTRL-V u00E0 (generates à) CTRL-V u00C8 (generates È) CTRL-V u00E8 (generates è) CTRL-V u00E9 (generates é) CTRL-V u00EC (generates ì) CTRL-V u00F2 (generates ò) etc... See for instance http://unicode-table.com/ for a full list of Unicode character codes. The following list of Unicode characters by language may also be useful: http://en.wikipedia.org/wiki/List_of_Unicode_characters In some cases such as this one, though, there might be an easier way to enter special characters (see :help digraphs and :digraphs). For example, while in insert mode you may be able to type the following: CTRL-K E! (yields É) CTRL-K a' (yields á) Note that as the following page shows: http://code.google.com/p/vim/source/browse/runtime/doc/digraph.txt Gvim 7.4 contains an even wider set of default digraphs than Gvim 7.3, thus providing convenience to an even broader set of languages. Regards.

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• No Homegroup Computers, Network Troubleshooter Fails

  - by Mokubai

  I have a problem with my Windows 7 Homegroup, between two Windows 7 Home Premium machines. On one machine I get this: The other machine in the Homegroup is perfectly happy and is able to see and browse this faulty machine as if there is nothing wrong. The Network and Sharing Center shows that I am joined to a Homegroup on my "Home" network and nothing is out of the ordinary. I have tried leaving the Homegroup and rejoining/recreating it several times and that does nothing at all. Normal browsing to machine names and looking through folders seems to work, but it's a much more clunky way to get stuff compared to the convenience of the Homegroup facilities. Starting the troubleshooter detects some problems with a "Peer Networking" (PNRpr or something like that) service not starting but fails to fix anything. Sure enough when I go to view the services via Control Panel - Administrative Tools - Services I see that both the "Peer Name Resolution Protocol" and "Peer Networking Grouping" services are stopped. Attempting to start the "Peer Networking Grouping" gives an error that a dependency service will not start, the only service it is dependant on is the "Peer Name Resolution Protocol" so I try to start that and I get an error saying that the "service could not start due to error 0x80630801" This has happened before and I have fixed it then by using System Restore and restoring the machine to a week before when I knew it had all worked. This time though I cannot remember when I last used the Homegroup from this machine and I've installed quite a bit so I don't want to go fumbling through restore points trying to find one that works... Can anyone tell me if there is a way to reset things so that this machine is able to use the Homegroup again?

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• LDAP object class violation: attribute ou not allowed in suffix?

  - by Paramaeleon

  I am about to set up a LDAP directory. It is used as a tool to communicate user permissions from a web application to WebDav file system access, e.g. adding a user to the web platform shall allow login to the file system with the same credentials. There are no other usages intended. Following this German tutorial which encourages the use of the attributes c, o, ou etc. over dc, I configured the following suffix and root: suffix "ou=webtool,o=myOrg,c=de" rootdn "cn=ldapadmin,ou=webtool,o=myOrg,c=de" Server starts and I can connect to it by LDAP Admin, which reports “LDAP error: Object lacks”. Well, there aren’t any objects yet. I now want to create the root and admin elements from shell. I created an init.ldif file: dn: ou=webtool,o=myOrg,c=de objectclass: dcObject objectclass: organization dc: webtool o: webtool dn: cn=ldapadmin,ou=webtool,o=myOrg,c=de objectclass: organizationalRole cn: ldapadmin Trying to load the file runs into an error, telling me that ou is not allowed: server:~ # ldapadd -x -D "cn=ldapadmin,ou=webtool,o=myOrg,c=de" -W -f init.ldif Enter LDAP Password: adding new entry "ou=webtool,o=myOrg,c=de" ldap_add: Object class violation (65) additional info: attribute 'ou' not allowed I am not using ou anywhere except in the suffix, so the question: Isn’t it allowed here? What is allowed here? Here is my answer. I am not allowed to post it as answer for 8 hours, so don’t mind that it is part of the question by now. I will move it outside some day, if I don’t forget to do so. There are numberous dependencies for the creation of elements, and error messages are rather confusing if you don’t know of the concept. The objectclass isn’t necessarily dcObject for the databases’ root node, as it is likely to guess when you read several tutoriales. Instead, it must correspond to the object’s type: Here, for a name starting with ou=, it must be organizationalUnit. I found this piece of information in these tables [Link removed due to restriction: Oops! Your edit couldn't be submitted because: We're sorry, but as a spam prevention mechanism, new users can only post a maximum of two hyperlinks. Earn more than 10 reputation to post more hyperlinks. Link is below]. Further on, the object class dictates which properties must and can be added in the record. Here, organizationalUnit must have an ou: entry and must not have neither dc: nor o: entry. The healthy init.ldif file looks like that: dn: ou=webtool,o=myOrg,c=de objectclass: organizationalUnit ou: LDAP server for my webtool dn: cn=ldapadmin,ou=webtool,o=myOrg,c=de objectclass: organizationalRole cn: ldapadmin Note: The page also states: “While many objectClasses show no MUST attributes you must (ouch) follow any hierarchy […] to determine if this is the really case.” I thought that would mean my root record would have to provide the must fields for c= and o= (c: and o:, respectively) but this isn’t the case. Link in answer is (1): http :// www (dot) zytrax (dot) com/books/ldap/ape/ "Appendix E: LDAP - Object Classes and Attributes"

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• Cannot connect to remote mail server for sending emails in ASP.NET

  - by Dave

  I want to migrate a web application from a Windows Server 2003 to a Windows Server 2008 R2. All works fine except sending emails from the application. If I configure the application to use the smtp server on "localhost" it works, but changing it to the "real" host name (e.g. mail.example.org) no mail is sent. The error message says, that the remote server needs a secure connection or smtp authentication. But since it works when using "localhost" instead of the host name I doubt that this is the problem. Also it's unlikely a problem with the mail server, I also tried it with another one. So for me it seems like the firewall is blocking the outgoing connection to the mail server. I tried to open port 25, but it still did not work. Maybe I just did it the wrong way. Update: For clarifying my setup: I have a Windows Server 2008 R2 with hMailServer installed (set up for some of the hosted domains) For the website I'm talking about I need to use an external mail server (totally different hosting provider) Apparently I was a bit off the track. It seems like it works when using connecting to the local mail server either with the host name "localhost" or "mail.somedomain.com" (while somedomain.com is set up in my mail server). But when using the host name of the external mail server ("mail.externaldomain.com") it seems like it tries to connect to the local server again, although this domain is not set up in the mail server. Thanks to Evan Anderson for the tip to use telnet - why I have not thought of it myself?... :-) Note, the website www.externaldomain.com is hosted on my server but the DNS entries are maintained by the other hosting provider. "externaldomain.com" is the only entry which points to my server all other records (MX, subdomains) are pointing to the other server. So I think the question is now, how do i bring my server to connect to the external mailserver. Do I have to configure this in my mail server or is it a windows server thing?

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• Excel chart with year-to-year comparison

  - by Craig

  Given this data: Date Year Month Usage (Kw-h) Cost/Month 02/19/08 2008 2 501 59.13 03/18/08 2008 3 404 48.49 04/16/08 2008 4 387 45.67 05/22/08 2008 5 319 37.85 06/23/08 2008 6 363 43.81 07/23/08 2008 7 372 48.86 08/21/08 2008 8 435 59.74 09/23/08 2008 9 358 49.9 10/16/08 2008 10 313 42.01 11/20/08 2008 11 328 39.99 12/16/08 2008 12 374 44.7 01/20/09 2009 1 474 55.35 02/19/09 2009 2 444 52.85 03/19/09 2009 3 398 49.25 04/17/09 2009 4 403 51.05 05/19/09 2009 5 405 49.61 06/18/09 2009 6 373 45.18 07/20/09 2009 7 337 44.67 08/18/09 2009 8 369 50.73 09/17/09 2009 9 377 52.36 10/16/09 2009 10 309 43.4 11/17/09 2009 11 249 34.14 12/16/09 2009 12 327 41.79 01/20/10 2010 1 356 45.66 I would like to produce a report that displays a Usage (Kw-h) line for each year. Features: Y axis: Usage (Kw-h) X axis: Month Line 0..n: lines representing each year's monthly Usage (Kw-h) Bonus points: instead of a line for each year, each month would have a high-low-close (HLC) bar; 'close' would be replaced by the average second Y axis and HLC bar that represents cost/month Questions: Can this be done without a Pivot table? Do I need to have the Year and Month column or can Excel automatically determine this? Current chart:

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• Sending mail through local MTA while domain MX records point to Google Apps

  - by Assaf

  My domain's email is managed by Google Apps, so that domain users get Gmail and Calendar, etc. But I also want to be able to send applicative notifications to users outside the domain via email (e.g. "some commented on your post", and so on). However, if I try to send email through code I get blocked by Gmail after a few emails. I send marketing email through MailChimp, to minimize the risk of appearing as spam to my users (one-click unsubscribe, etc.). But I can't send applicative message in this way. I want to install a local MTA (my server runs Ubuntu), but I'm not sure what anti-spam measures I need to implement so that receiving MTAs don't think it's a spam server. What's stopping anyone from setting up a mail server and sending emails using my domain name? AFAIK it's the DNS records that show the MTA's address actually belongs to the domain. But my understanding of this is rather superficial, so someone please correct me if I'm wrong. But what sort of DNS configuration do I need to put in place so that I don't get blacklisted (assuming I don't actually spam anyone)? The MX records already point to Google, and I'd like to keep it this way. So do I just need to define an A record for my internal mail server? Should it show email as coming from a sub-domain, so as not to conflict with the bare domain being managed by google? Edit: Does the following SPF record make sense if I want email from my domain name to be sent by either google's servers or any server with a dns name ending with mydomain.com? "v=spf1 ptr mx:google.com mx:googlemail.com ~all" How should I set up reverse DNS for my server? If I have an A record that points mailsender.mydomain.com to my MTA's ip address, does it mean that reverse lookup will only allow emails sent from [email protected]?

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• Possible to host CentOS netinstall files on a local HTTP/FTP?

  - by garlicman

  I'm running XenServer on an Dell R610 and am running into a catch-22. During install from DVD, CentOS can't find the DVD package catalogue. It's a reported error for some, XenServer + CentOS6 + DVD install in some hardware configurations = failed install. Yes, I checked the MD5 and let the disc test pass. In every reported case, the netinstall was the solution. The issue is my net access is required to go through a web proxy that prompts before you can download a file. This naturally breaks any download automation. I've been waiting on our IT to put in an exception rule to allow my lab to bypass the prompt, but it's been over 3 weeks now and they don't seem responsive. (I've been working on this a day or two a week) I want to try and host the netinstall files local in my Xen network. Right now I only have a bunch of Windows based VMs, CentOS won't install so I don't have any Linux tools. I had tried simply hosting all the DVD contents off one of the Windows servers using Mongoose. (I didn't want to setup IIS) I copied them to a hosted sub-directory similar to all the mirrors out there (e.g. http:///centos/6.2/os/i386/) with no auth or anything. Then in the netinstall I correctly pointed to it. I now realize just copying the DVD files over won't work. The repodata will point to a local device, not the site I'm hosting. (e.g. the DVD repodata includes xml that points to where the packages are) Clearly I'm hosting them over HTTP, not from a DVD. Is there an easy way to sort this out? I'm just trying to install CentOS6 on Xen. If there's a turnkey downloadable Xen image with CentOS 6.2 on it, or a downloadable repo image, I'll take that too! Thank you in advance!

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• What is the difference between disabling hibernation and idling time for a NAS?

  - by Gary M. Mugford

  I have two D-LINK DNS-323 NAS boxes with two Seagate drives in each. The first one is about a year old, the second one about three months. The first two on Monster are each 1.5T drives while the last two on Origami are 2T drives. I have never been overly happy with the Monster drives but, outside of poor throughput on small files, they have been consistently available to all programs after I put a batch file into my startup to do a directly listing of each. I added the two new drives when I added the Origami box. But, watching the dos box that comes up, I rarely see both listed before the box disappears. Other programs, backups, Belarc, even my file browsers, seem to have a dickens of a time seeing O: and P:. Finally, I decided to go into setup and turn off hibernation. Performance HAS been better since and Belarc, for instance, now sees both drives. At the time of poking around, I noticed an Idle Time feature too. What is the difference between the two settings? And for added points, how much trouble am I in for turning off hibernation? The super bonus round ... anything ELSE I should have done? Thanks in advance, GM

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• Window 7 Host does not answer to ping

  - by gencha

  Today I tried printing on a shared printer on one of our homegroup members. Sadly it did not work (printer marked as offline). Shortly after, I noticed I can't even ping the machine that owns the printer (I also can not remotely access it in any other way I've tried). Currently I'm trying to ping the machine from the router both computers are connected to (and my machine in question doesn't answer). I do receive the echo requests (as verified with WireShark). I also added a rule in the Windows Firewall to specifically allow ICMP echo requests, but that didn't change anything. I also tried netsh firewall set icmpsetting 8 enable, but that didn't change anything either. Completely disabling the Windows Firewall has no effect on the issue either. One has to wonder, where does Windows log when and why it ignored any incoming packets? How can I get to the bottom of this? Here are some ways I found to dig deeper into the issue: Enabling logging on the Windows Firewall Enabling Windows Filtering Platform Auditing Both methods at least give more insight into the issue. The plain log file is full of entries like this: 2011-11-11 14:35:27 DROP ICMP 192.168.133.1 192.168.133.128 - - 84 - - - - 8 0 - RECEIVE So the ICMP packets are being dropped as if that was intended. The Event Viewer now gives a little bit more details: The Windows Filtering Platform has blocked a packet. Application Information: Process ID: 4 Application Name: System Network Information: Direction: Inbound Source Address: 192.168.133.1 Source Port: 0 Destination Address: 192.168.133.128 Destination Port: 8 Protocol: 1 Filter Information: Filter Run-Time ID: 214517 Layer Name: Receive/Accept Layer Run-Time ID: 44 This same entry is always repeated with 2 points of information changing: Process ID: 420 Application Name: \device\harddiskvolume2\windows\system32\svchost.exe The service host with the PID 420 is the host for the following services: Windows Audio DHCP Client Windows Event Log HomeGroup Provider TCP/IP NetBIOS Helper Security Center Additionally, there is currently this problem with the same machine: Even though my network is set to be a "Home network", I am unable to create a new homegroup.

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• Centos/Postfix able to send mail but not receive it

  - by Dan Hastings

  I have set up postfix and used the mail command to test and an email was successfully sent and delivered. The email arrived in my yahoo inbox BUT the sender also recieved an email in the Maildir directory saying "I'm sorry to have to inform you that your message could not be delivered to one or more recipients", even though the message was delivered. I tried replying from yahoo to the email but it never arrived. I have 1 MX record added to godaddy which i did last week. Priority0 Host @ Points to mail.domain.com TTL1 Hour Postfix main.cf has the following added to it myhostname = mail.domain.com mydomain = domain.com myorigin = $mydomain inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mynetworks = 192.168.0.0/24, 127.0.0.0/8 relay_domains = home_mailbox = Maildir/ I checked var/logs/maillog and found the following errors occuring postfix/anvil[18714]: statistics: max connection rate 1/60s for (smtp:unknown) at Jun 3 09:30:15 postfix/anvil[18714]: statistics: max connection count 1 for (smtp:unknown) at Jun 3 09:30:15 postfix/anvil[18714]: statistics: max cache size 1 at Jun 3 09:30:15 postfix/smtpd[18772]: connect from unknown[unknown] postfix/smtpd[18772]: lost connection after CONNECT from unknown[unknown] postfix/smtpd[18772]: disconnect from unknown[unknown] output of postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 home_mailbox = Maildir/ html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = domain.com myhostname = mail.domain.com mynetworks = 168.100.189.0/28, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop unknown_local_recipient_reject_code = 550

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• Arch Linux drops me on my school network

  - by Kravlin

  I'm running a Lenovo X61 which i carry around my college for getting on the internet at various points in the day. The network has always been finicky but recently it's gotten worse. I'll connect using iwconfig, get an ip from dhcpcd and log in using vpnc to their system. Sometimes I'll stay connected for hours but most of the time within 30 seconds my network traffic will drop to zero and i'll be unable to do anything. My computer still belives it's connected, however to try again i need to put my wireless interface down, put it back up and try again. It's gotten so bad that i've got a window on my computer pinging yahoo or google constantly in order to know if i'm still able to get online. I know other people who have used Arch Linux that don't have the same problems as well as people who use Ubuntu who haven't had any problems either. It seems like my computer is a special case. Does anyone have any suggestions on how to fix it? dmesg doesn't show anything out of the ordinary going on and i don't know where else to look for errors or other things to try. Edit: this doesn't happen on my home network. It's a problem that only happens at school.

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• Good visuals supporting adopting Macintosh in a Windows company

  - by jdmuys

  I work in a Windows only software service company, which just put up an internal contest for innovative ideas for the company. The idea I submitted is to let employees use a Mac instead of the mandatory PC if they wished to. My idea has been selected (among a few others) to reach the next stage of the contest. One of the items requested for the next stage is ONE visual that best illustrates the idea. While my pitch is rather good (I think), I have a hard time coming up with ONE visual that would be suggestive enough and not too fanboy-ish, or too restricted. That's why I am requesting suggestions. For reference, some of the points I intend to develop are (not in order): de facto safety (little or no malware) Apple as a company reached its leading position through innovation (bio)diversity is a source of value for a service company, that expands its reach. it makes financial sense the Mac is the most compatible machine, making it a lot easier to test our software (especially web sites). Some OS X technologies can be valuable to a software service company (eg Applescript) Some Apple tools can help us improve (eg Keynote) It's good citizenship for our company as Apple is now best in class according to Greenpeace. I realize this question may be out of topic here. I'd be happy to have suggestions on where to post this question. Please do not argue why OS X might be better or worse than Windows. My question is very narrow. Thanks.

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• How to calculate unweighted averages in Excel PivotTable?

  - by yonatron

  I often make PivotTables in which each row contains a number of per-person average measures. I then want to look at the unweighted column average for each measure, and usually make some kind of chart from these. Because my individual cells are often averaged from different numbers of data points, the Grand Total row ends up being a weighted average, which I’m not interested in. So I usually make my own average row a few rows above the table to use for my charts. That’s not too much work, but there’s another problem. I often add a few more people’s worth of data to the PivotTables’ source, then refresh the tables. This means my average row needs to be updated to encompass more rows from the PivotTable. Not a huge deal with one table, but when I have lots of them across lots of sheets, I have to do find/replace on a whole bunch of formulas. So: is there a way to automatically get unweighted column averages in a PivotTable, such that when the table is refreshed, the averages don’t change locations and encompass the newly added (or removed) data Thanks

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• What is the ideal way to set up multiple FTP enabled web accounts on Fedora?

  - by Nicholas Flynt

  I'm setting up a test server for use as a web development platform, and I'd like to mimic as closely as I can a typical shared hosting setup. That is, I'd like my server to have multple user FTP accounts, each of which links to a directory containing the webroot of the site, and I'd like apache to be able to easily see and manupulate these files. I'll admit: I'm not as familiar with Fedora as I'd like, I run Ubuntu on my home box and SElinux is giving me some grief. My initial plan was to have each user FTP into their home directory, and put the web directory there as well, but SElinux throws a hissy fit when apache tries to access anything outside of its web directory, so that plan was a no go. Would it be wise to continue this route, and perhaps mount web directories in user home folders so that FTP could still be used to access them, even though apache saw them in var/www like it expects? Would it make more sense to set up custom FTP accounts and use a single FTP user on the server box? What's the general course of action on something like this? I'm using vsftpd right now to host web directories, which is why I'm liking the home directory approach (it's simple and secure) but of course there's bound to be a better way to go about it. Thanks. (I'll leave other things, like restricted DB access and such, to another post. I'm interested right now with just getting FTP and apache to play nice in a multi-user environment.) PS: For the record, an issue I ran into when doing all of this was that if apache isn't running as the same user as the FTP account is saving as, there are permissions errors when FTP creates files, requiring the remote user to chmod the files to fix it. A logical fix would be to run apache in a special group, put all web users in this group, and have FTP access default to giving this group read/write access to everything like apache would expect, but I never could figure out how to accomplish this. Bonus points and cake if you know a solution.

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• How to point any *.mydomain variation to localhost (for development)?

  - by user41339

  Hi all. I am developing a site, which will make use of any given [variation of] subdomain name part (that is, the part prefixed before the host name and, optionally, the TLD part). I would imagine that in production, that would be an easy feat - make sure the DNS for second-level domain name part points to an IP, set up Apache2 virtual host to listen on that (or any) IP port 80, and just use PHP to make decisions based on the "Host" request header. However, currently the site is localhost, since I am developing it using my workstation, so first I patched the /etc/hosts to include: 127.0.0.1 mydomain I only used one name part (arguably a custom TLD) so as to not interfere with the Internet domain names. Then I set up a VirtualHost directive for Apache 2.2 like: <VirtualHost *:80> ServerName mydomain But now I can see that f.e. example.mydomain does not point to localhost, meaning the the /etc/hosts addition is not effective for "something.mydomain". It appears the rules are taken verbatim, and also I have checked that wildcards like *.mydomain are not allowed. Is there a solution for this?

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• RAID6 mdraid -> LVM -> EXT4 root with GRUB2?

  - by Rotonen

  2012-03-31 Debian Wheezy daily build in VirtualBox 4.1.2, 6 disk devices. My steps to reproduce so far: Setup one partition, using the entire disk, as a physical volume for RAID, per disk Setup a single RAID6 mdraid array out of all of those Use the resulting md0 as the only physical volume for the volume group Setup your logical volumes, filesystems and mount points as you wish Install your system Both / and /boot will be in this stack. I've chosen EXT4 as my filesystem for this setup. I can get as far as GRUB2 rescue console, which can see the mdraid, the volume group and the LVM logical volumes (all named appropriately on all levels) on it, but I cannot ls the filesystem contents of any of those and I cannot boot from them. As far as I can see from the documentation the version of GRUB2 shipped there should handle all of this gracefully. http://packages.debian.org/wheezy/grub-pc (1.99-17 at the time of writing.) It is loading the ext2, raid, raid6rec, dosmbr (this one is in the list of modules once per disk) and lvm modules according to the generated grub.cfg file. Also it is defining the list of modules to be loaded twice in the generated grub.cfg file and according to quick Googling around this seems to be the norm and OK for GRUB2. How to get further by getting GRUB2 to actually be able to read the content of the filesystems and boot the system? What am I wrong about in my assumptions of functionality here? EDIT (2012-04-01) My generated grub.cfg: http://pastie.org/3708436 It seems it first makes my /usr logical volume the root and that might be source of the failure? A grub-mkconfig bug? Or is it supposed to get access to stuff from /usr before / and /boot? /boot is on / for me - no separate boot logical volume.

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• Configuring ZenOSS to monitor CPU load

  - by Tom

  I'm trying test out monitoring tools for a network at work with a coworker but neither of us have ever used an sort of monitoring tools before. Currently we are experimenting with ZenOSS and having some difficulties. We want to populate our CPU load graphs because that is one of the primary feature we are looking for in our monitoring tools but we have been unable to populate the graphs with data. So far we have installed the wmipreformance, sqldatasource, wmidatasource, snmpperformance(simple) zenpacks and the machine we are trying to monitor is running Windows XP. We have tried to model the device and everything seems to run and we've tride to add data points to graphs but the only options we recieve for graphs are CPU and Memory. We are able to monitor services, ZenOSS recognizes the make and model of the processor, RAM, and Harddrive and is even giving us metrics on available storage but again, we are looking for performance metrics such as CPU load and Memory utilization. I realize I probably didn't provide a lot of information but that is because we don't have a very good idea of what we are doing and can't find instruction either on the ZenOSS homepage or forums to monitor CPU load. If someone could give us step by step instruction on how to set up CPU load monitoring that would probably be more beneficial to us than a diagnostic of our current setup, but regardless, if I left any important information out and you need it to answer the question, please let me know. Thank you.

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• Looking for comprehensive computer monitoring software

  - by cornjuliox

  Summer in this country is insanely hot. So hot in fact, that I think we just lost a machine due to overheating (last recorded CPU/GPU temp was close to 100 C, now it wont start and lets out a long series of short beeps on power up), but that's not my concern here. Since heat is such a problem for me, I use several different pieces of software to monitor temperatures in my machine. I use MSI Afterburner to monitor GPU temp, control GPU fan speed and for some light overclocking, and then I use Speccy and SpeedFan to monitor the rest of the system, CPU temp and everything. The setup works fine for now, but I want to consolidate all this into one program so I'm not juggling several windows at once. Is there any program out there that will let me monitor the following from a single window: CPU Temp and Fan Speed CPU clock GPU Temp and Fan Speed GPU clock, both core and memory Additionally, mobo temp (Speccy lists both CPU and Motherboard temp, I assume that the latter is referring to North and Southbridge temperatures. I'm also looking for the ability to chart these data points on a graph over time, basically to see just how high the temperatures spike under load and for general analysis. It'd be nice if it could handle overclocking of both CPU and GPU in real time too. Any suggestions? Edit: I forgot to mention that I'm on Windows 7, 64-bit

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