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• how to bypass internal DNS?

  - by fabjoa

  This is about Ubuntu but should be pretty much the same on all Linux flavors. Let's say I add an entry to my /etc/hosts such as 127.0.1.12 facebook.com and an Apache virtual host such as <VirtualHost 127.0.1.12> ServerName facebook.com DocumentRoot /var/www </VirtualHost> when i open my browser and send a GET request to facebook.com, firefox will browse my /var/www folder. Question: How could I fetch (ie, using wget in bash) the real facebook.com domain - without erasing the entry in /etc/hosts nor my Apache VirtualHost -- IOW how could I bypass internal DNS?

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• Grep a strange acirc character

  - by John Hunt

  I have this character appearing in places in some files I have:  (if you can't see it or it looks like a question mark it's the Acirc character (capital A with a circumflex over it)) I simply want to grep replace this char with a space, however when I do this: grep --color -ri  myproject.php Putty gets very confused, as does grep. As I understand it there's probably a way to use an escaped hex code with grep.. does anyone know how? EDIT: The character is showing up on my web page as a weird <?>. The http headers for the page specify utf-8 as does the meta character set and I still see the strange character. In putty it appears as a space (putty also set to utf-8.) When I copy from vim and paste into grep it simply doesn't find it. Cheers, John

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• Huawei E170 on Linux?

  - by torbengb

  Related to this question, I need to know if the specific combination of Ubuntu 9.10 + the Huawei E170 (HSDPA broadband modem USB stick) will work? Bonus points for a link to a webpage that decsribes exactly how it is done! Specifically, I'm in Austria and the telco is A1, but I hope that the setup would be the same regardless of location/provider. I have found these two pages that seem horribly complicated to a Linux noob. Is there a simpler way, or do I really need to dive into that? Your input is much appreciated! If I can get confirmation that it's supported, then I'd switch to Ubuntu Netbook Remix, because I'm already running Ubuntu on the main pc at home and I'd like to keep things simple.

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• APCUPSD and Hyper V R2

  - by Jason Berg

  I'm about to deploy a Windows Server 2008 R2 machine with the Hyper V role. I'd like to get away from having to use a network management card with my APC UPS as I'm only shutting down 1 server (it just seems like an unneeded point of failure). I'd like to look into using apcupsd instead. Will this work properly if I use a serial connection? Have you got it working yourself? How is the SNMP monitoring? I really like being able to easily monitor my UPS with SNMP when powerchute is installed. Will I be sacrificing this completely? Is the network management card really the way to go with this? If so, why? Bonus question: Is there a better UPS out there that I should be recommending in the future?

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• Is it a bad idea to run an asp.net app pool with the same identity as IIS's anon user?

  - by Andrew Bullock

  Subject says it all really, Thinking on security terms, I want to give each site on my server its own user account, so that they can't access each other's data. I also want to use integrated authentication for sql so i dont have any passwords knocking about in connection strings. Is it a bad idea to use the same account for the app pool identity and the anon user account for iis (im interested in answers for both v6 and 7)? Edit: ive seen this post describing how IIS7 allows you to automatically use the same account, but the question of whether its a good idea or not remains ;) If so, why? Thanks

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• Videoediting slow on windows with HD footage in fileformat .MOV

  - by Joakim

  Hi, My camera a Canon 5D mark II serves me .mov files in HD - but these are a pain in the neck to edit on my pc. I have tried Premier, Vegas, Pinnacle etc - but it is almost impossible to edit and do a movie. I do have a good computer with windows7 but that doesnt help me, and I dont want to buy a new monster pc just for that task. Question: I could manage to convert the files, but what would be the best format? I dont want to loose to much quality. Anyone have any ideas? Best regards, Joakim

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• Setting a custom timeout to nmblookup

  - by C2H5OH

  As part of a batch script, I have the following command: hostname=$(nmblookup -A $ip_address | awk '$2 == "<20>" {print $1}') Which works fine from a functinality perspective, even for unresolved hosts. The problem is that when the IP address is not reachable or the remote machine does not respond to the SMB request, the command takes about ten seconds to complete. Therefore, the question is simple: is there a way to lower the elapsed time in such cases? Or, in other words, is there a way to set a custom timeout for the nmblookup command? NOTE: I'm interested in solutions that do not make use of SIGALRM or similar mechanisms; if they exist. The nmblookup version is 3.6.3 from Ubuntu 12.04 LTS.

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• Remote control a computer using another computer

  - by Dean

  I've got a main desktop computer at home, I'd like watch movies using it but able to control it afar. For example, I would like to lay on my bed and control the desktop using my own laptop via wireless. I've been looking for solutions to my question. I tried to use remote desktop, I can pause the movie but I then have to go to the pc to log in the OS again. I also tried to bind my desktop to my mobile phone over bluetooth, this works as I can control the mouse etc. but I found I can barely see the mouse pointer when at long distance. I still wish I can use my laptop as a remote control, is this possible?

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• lsass.exe memory leak on windows 2003 server

  - by thelsdj

  In the past month or so I noticed that lsass.exe has started to leak memory, getting to 500MB+ of ram in under a week after reboot. Before this I had never noticed it using any significant amount of memory compared to other processes on the system. This is happening on 2 identical servers, neither of which has anything to do with Active Directory. Maybe a recent Windows Update has caused this? Any thoughts on things to check? As a side question is there some way to recycle the memory usage of lsass.exe without rebooting? Edit: Here is what I'm seeing in Process Monitor, there are thousands of registry open/query/close a minute from lsass.exe. How can I track down what is triggering these?

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• (Tough) Security Queston about ISP companies

  - by buyrum

  I want to ask a question. One ISP was criticized for it's low security conditions, and when i heard this i started to think: If one gets an unauthorized access to the mainframe computer / internal network of the ISP, then wouldn't he be able to sniff all the traffic ? Because the ISP is providing the internet connection for the user so all traffic that sends and transmits a user travels via the ISP, right ? What security solutions (talking about computer security) are being implemented by other ISP in order to protect themselves and their users ? If all the connections are being sent via a special computer, how secure it is and how can be we sure that it's really safe ? And what kind of computers are those who serve as backbones for the ISP ? Thank you in advance for your help.

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• setting domains

  - by allenskd

  I'm setting a local webserver to do a lot of web development work from now on. I'm not really knowledgeable in hosting configuration. Thing is I just added mydomain.com in /etc/hosts that's fine but what's the next step? TI need to use the wildcard on *.mydomain.com, so I'm figuring I need to add my zone in bind, is this correct? so I can make use of virtual hosts in apache and in play-framework Everything will be local, but once in a while I want to make public of my webserver to certain people using the no-ip service, in windows I've done it, in linux I don't know if it's any difference. The question is pretty much if I'm configuring it right or not? If this sounds confusing let me know, I'll try to detail it more

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• How to use dd to make splitted ISO images from an storage device?

  - by Gustavo Bandeira

  This is a double question, I just hope it's valid. I need to know how to use dd to make splitted ISO images from some storage device, I'm doing it through SSH: the process is slow and the risk of faling at the mid of the operation (1) is high then I need to know how to make these splitted ISO images from my storage device. (2) I'm searching for some reference on dd, it could be a book or a good website about it for when any doubt arises. 1 - I'm doing it on a ~60GB storage device, it took me a whole day to copy ~10GB from this disk. 2 - For curious people, I'm trying to recover an accidentaly deleted file from an iPod, until now I've been able to make the whole process, I just need to improve it beucase I left it copying the disk yesterday: Today it gave me an error when it was at ~10GB.

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• Recovering/Rebuilding MySQL .FRM, .MY* files from IBDATA1

  - by Synetech

  I recently had an incident in which several MySQL files were wiped out (mostly from WordPress, but also a few of MySQL’s own files). The IBDATA1 file is unaffected, but several .frm are gone as are a few .myi and .myd files. So now I need to find out if there is a way to rebuild the missing files from IBDATA1. I tried Googling it, assuming that such an issue has come up before, and indeed there were numerous search results (including this question), but all of the ones I looked at were the opposite, about recovering from .frm and .my* files or somehow required these files. Is there a way to rebuild these files? I know I have a relatively recent backup (a .SQL file) if there isn’t, but I’m hoping that these are the kind of files that are rebuilt if missing or outdated.

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• OpenVPN performance: how many concurrent clients are possible?

  - by Steffen Müller

  I am evaluating a system for a client where many OpenVPN clients connect to a OpenVPN server. "Many" means 50000 - 1000000. Why do I do that? The clients are distributed embedded systems, each sitting behind the system owners dsl router. The server needs to be able to send commands to the clients. My first naive approach is to make the clients connect to the server via an openvpn network. This way, the secure communication tunnel can be used in both directions. This means that all clients are always connected to the server. There are many clients summing up over the years. The question is: does the OpenVPN server explode when reaching a certain number of clients? I am already aware of a maximum TCP connection number limit, therefore (and for other reasons) the VPN would have to use UDP transport. OpenVPN gurus, what is your opinion?

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• Requiring SSH-key Login Via PAM From Specific IP Ranges

  - by Sean M

  I need to be able to access my server (Ubuntu 8.04 LTS) from remote sites, but I'd like to worry a bit less about password complexity. Thus, I'd like to require that SSH keys be used for login instead of name/password. However, I still have a lot to learn about security, and having already badly broken a test box when I was trying to set this up, I'm acutely aware of the chance of screwing myself while trying to accomplish this. So I have a second goal: I'd like to require that certain IP ranges (e.g. 10.0.0.0/8) may log in with name/password, but everyone else must use an SSH key to log in. How can I satisfy both of these goals? There already exists a very similar question here, but I can't quite figure out how to get to what I want from that information. Current tactic: reading through the PAM documentation (pam_access looks promising) and looking at /etc/ssh/sshd_config.

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• Virtual Sound Card for Windows Server?

  - by Ian Boyd

  i have some software running on a server which requires a sound card to be installed. i'm trying to find a virtual, or emulated, sound card driver for Windows 2000 Server. It doesn't have to play anything, send streams anywhere, or do anything. It just has to be there. Note: This is a physical machine, but i want the solution that will port to a Microsoft Virtual Server machine running Windows 2000 Server. (in other words, buying a sound card will not work) i've already tried the REaudio driver from MixW; it does not work (no sound card virtually appears in the system). Update: 1k views? Obviously people are finding it an interesting question to keep stumbling across it. Up-vote it!

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• Can Linux file permissions be fooled?

  - by puk

  I came across this example today and I wondered how reliable Linux file permissions are for hiding information $ mkdir fooledYa $ mkdir fooledYa/ohReally $ chmod 0300 fooledYa/ $ cd fooledYa/ $ ls >>> ls: cannot open directory .: Permission denied $ cd ohReally $ ls -ld . >>> drwxrwxr-x 2 user user 4096 2012-05-30 17:42 . Now I am not a Linux OS expert, so I have no doubt that someone out there will explain to me that this is perfectly logical from the OS's point of view. However, my question still stands, is it possible to fool, not hack, the OS into letting you view files/inode info which you are not supposed to? What if I had issued the command chmod 0000 fooledYa, could an experienced programmer find some round about way to read a file such as fooledYa/ohReally/foo.txt?

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• "dig +trace fqdn" and "dig fqdn" do not give the same result on a LAN with windows DNS server, why?

  - by Sulliwane

  in my company LAN I have a Ubuntu 14.04 server running in Virtualbox (as guest) on a Windows 7 (the host) with network interface bridged (so the Ubuntu server belongs to the LAN, with its ip: 192.168.1.85). I have a website on this server: mywebsite.com The gateway for the LAN to the internet is 192.168.1.1 (Cisco 1841)--188.188.188.254 as public IP. There is a Windows 2008 server that acts as DNS server and DHCP server on the LAN. I added a Forward zone "mywebsite.com" with A record - 192.168.1.85. Outside the LAN, mywebsite.com has public Dns records that point on the Cisco 1841 public IP (188.188.188.254) Now when I ping mywebsite.com from the lan, I quickly get 192.168.1.85. But when I'm connecting through the browser on the clients, it's not always fast. So I'm wondering: Are my requests really/directly resolved and forwarded to 192.168.1.85, OR are they sent out of the LAN, and then forwarded back to the CISCO public 188.188.188.254:80 and NAT to the Ubuntu server before being served ??? To try to answer this question, I looked for tracking the DNS request from my linux client on the LAN: v@v-ss9:~$ dig mywebsite.com ; <<>> DiG 9.9.5-3-Ubuntu <<>> mywebsite.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24850 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4000 ;; QUESTION SECTION: ;mywebsite.com. IN A ;; ANSWER SECTION: mywebsite.com. 3600 IN A 192.168.1.85 ;; Query time: 1 msec ;; SERVER: 127.0.1.1#53(127.0.1.1) ;; WHEN: Fri Aug 22 09:50:16 CST 2014 ;; MSG SIZE rcvd: 66 This answer looks right: 192.168.1.85. But then look at this: v@v-ss9:~$ dig +trace mywebsite.com ; <<>> DiG 9.9.5-3-Ubuntu <<>> +trace mywebsite.com ;; global options: +cmd . 12955 IN NS h.gtld-servers.net. . 12955 IN NS g.gtld-servers.net. . 12955 IN NS m.gtld-servers.net. . 12955 IN NS i.gtld-servers.net. . 12955 IN NS l.gtld-servers.net. . 12955 IN NS k.gtld-servers.net. . 12955 IN NS j.gtld-servers.net. . 12955 IN NS d.gtld-servers.net. . 12955 IN NS b.gtld-servers.net. . 12955 IN NS c.gtld-servers.net. . 12955 IN NS a.gtld-servers.net. . 12955 IN NS e.gtld-servers.net. . 12955 IN NS f.gtld-servers.net. ;; Received 516 bytes from 127.0.1.1#53(127.0.1.1) in 18 ms mywebsite.com. 172800 IN NS ns3.rmi.fr. mywebsite.com. 172800 IN NS ns4.rmi.fr. CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN NSEC3 1 1 0 - CK0QFMDQRCSRU0651QLVA1JQB21IF7UR NS SOA RRSIG DNSKEY NSEC3PARAM CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN RRSIG NSEC3 8 2 86400 20140825045016 20140818034016 6122 com. Imq8K9xlvFXlB4IjUkdxOc5YHoTEhqSQUlRSJ9QCIhd9wzGpWJ54AfVf WJ0SUKThalpzqS0cXdLGtNmuYgqLfwUMjpUlT4c+zJyx7I4QMPLImQZh Ov0xy3mUr7dLlymAJYGs9dLI2IaheLvpKTBwaV1gAvo8QEkU8VRiJ7gW 9dk= U0PIA23FHMVPTKSDHC9PJ1BEA9SIB65R.com. 86400 IN NSEC3 1 1 0 - U0PL33R61V6TCCPBS1171PROP57ASRD9 NS DS RRSIG U0PIA23FHMVPTKSDHC9PJ1BEA9SIB65R.com. 86400 IN RRSIG NSEC3 8 2 86400 20140825043502 20140818032502 6122 com. qsC5sJbwklao+OedCHpcYo56aQaY0N+7peKmPu8szvjAQoJFRWyuDfAh Nw/gvHXEMzG7tYLriQGVfsiK8GZdPXyG4Ghe1MNN4jOZnSahkT5LjlqL 5QyGC0QiClRMPDAYjUOFGQDkjOJcJYvTNkEyXC2BEpfLI5SwCbYqwqg3 RkE= ;; Received 585 bytes from 192.41.162.30#53(l.gtld-servers.net) in 297 ms mywebsite.com. 86400 IN A 188.188.188.254 mywebsite.com. 86400 IN NS ns3.rmi.fr. mywebsite.com. 86400 IN NS ns4.rmi.fr. ;; Received 204 bytes from 212.51.161.18#53(ns3.rmi.fr) in 310 ms Here I get my CISCO public IP 188.188.188.254!!! Is it normal? How to know if my browser (from the LAN) is really directly communicating with 192.168.1.85 when using mywebsite.com? Thank you for your help.

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• Apache/Django subdomains problem

  - by thomasgg

  Now I have apache configuration which works only with localhost domain (http://localhost/). Alias /media/ "/sciezka/do/instalacji/django/contrib/admin/media/" Alias /site_media/ "/sciezka/do/plikow/site_media/" <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython SetEnv DJANGO_SETTINGS_MODULE settings PythonPath "['/thomas/django_projects/project'] + sys.path" PythonDebug On </Location> <Location "/site_media"> SetHandler none </Location> How can I make it working for some subdomains like pl.localhost or uk.localhost? This subdomains should display the same page what domain (localhost). Second question: It is possible change default localhost address (http://localhost/) to (http://localhost.com/) or (http://www.localhost.com/) or something else?

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• How to enable catch-all email in iRedMail Open Source edition?

  - by Matthias

  How to create catch-all email alias for domain in iRedMail Open Source edition? I know that's possible via LDAP and found the following instructions: http://iredmail.org/wiki/index.php?title=Addition/OpenLDAP/Catch-all The problem is how exactly to add this parameters via phpLDAPAdmin? I select "Create new entry here" and choose mailUser type. Then in step 2 first question is about "RDN" with select box "select RDN attribute". What should I choose as RDN? Which fields of the "Create Object" form should be filled? Unfortunetly there is completely no validation of user input and final errors does not contain explanation what's wrong Also when I try to import example from iredmail wiki phpldapadmin it gives LDIF Import Parse Error Description: A valid dn line is required [] dn line is: dn: [email protected],ou=Users,domainName=mydomain.eu,o=domains,dc=myserver,dc=pl

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• Files Corrupted on System Restore

  - by Yar

  I restored my OSX today by copying the system over from a backup. Most things seem to be working, but every single GIT repo gives pretty much the same error fatal: object 03b45161eb27228914e690e032ca8009358e9588 is corrupted I have tried chowning, doing everything as sudo or root... I have no idea what to try next. This would be a normal git question except that it's on many repos. Ideas? Note: I'm using git 1.7.0.3 and I was probably using 1.7.0 before. Edit: Tried with 1.7.0.2 and it made no difference. Edit: Even when copying any of the repos I get this strange message cp: .git/objects/fe/86b676974a44aa7f128a55bf27670f4a1073ca: could not copy extended attributes to /eraseme/Pickers/.git/objects/fe/86b676974a44aa7f128a55bf27670f4a1073ca: Operation not permitted

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• Why would Firefox not be able to visit Google anymore?

  - by Edward Tanguay

  Lately I've noticed that my Firefox Browser was taking a long time when I would search Google, e.g. 3 seconds before I would see any results. If I search for a three-word phrase, it just hangs trying to connect: I removed all add-ons but it still does this. I thought it might be something with my router, but Chrome, Safari, Opera and Internet Explorer all work fine. Bing works fine in Firefox. Here's my Firefox version information: Otherwise I can still use Firefox, e.g. I'm using it to post this question, but I do notice that when I browse with it, images are often "broken" for a split second before they appear, as if it is having a hard time pulling them from a remote server. Other browsers don't do this. What could be causing Firefox to hang when searching Google?

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• SQLCMD not recogized despite install of SQL Server Native Client for SQL2008

  - by John Galt

  This little question is part of a much larger issue I am trying to resolve: Does SQLCMD require a separate install or is it included with the Microsoft SQL Server 2008 Native Client (which I just installed on my webserver). Maybe this is just an incorrect path issue. Here is what I tried: C:\>sqlcmd -S tcp:devmojito\mssqlserver2008,1433 'sqlcmd' is not recognized as an internal or external command, operable program or batch file. C:\> This same syntax works when executed from the c drive on my SQL Server machine.

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• Linux : Forward users mail using exim4 server (newbiw warning)

  - by llazzaro

  Hello, I have a network of linux server, one of them is running exim4 that server could send [email protected]. At exim4 server, I had setup an alias for the users accounts ...for example root : [email protected] But I have other server, if I put the alias email is marked as spam...since they arent using exim4 server. I want to configure the other server to use that exim4 server, in order to dont get the mails mark as spam. Well I know this is really newbie question, but searching at google is difficult since it confuses exim4 server configuration than the client configuration to use exim4 server. Remember, I want root@server1,root@server2,etc mails send via exim4 server!

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• Will my system fsck when I reboot?

  - by Tom Newton

  ...and how do I find out? Say I am about to reboot a server. I would like to minimize downtime, so thinking about wrapping reboot in an alias that says "hang on buddy, you're going to hit a fsck on boot". Next question.. what's the best way to say "lets do it next time?" set the last check date? I know tune2fs can set a bunch of parameters, but how would I get em?

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