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• Where to set catch-all address in Postfix (virtual mailboxes in affect)

  - by Cem

  I successfully configured Postfix to deliver messages to virtual mailboxes. I can set aliases and pipes inside /etc/postfix/virtual and mailboxes inside /etc/postfix/virtual_mailbox files. However, whenever I set a catch-all domain and point to a remote email address, it overrides all other virtual mailboxes and virtual aliases set in postfix. How can I set a catch-all forwarding to the remote email address when virtual mailbox is enabled? I set catch-all like this: @mydomain.com [email protected] Thanks for your help!

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• I need to create a volume/symbolic link from a UNC Path

  - by Sebas

  I have a workstation with Windows XP and I need to make a symbolic link or mount a UNC Path like a local Drive. I need the same behavior that produces M-Daemon tools when you mount an .iso File but with a remote directory. This is because I have a software client that perform several task but only with local drives and directorys. The remote UNC path is a NAS server, thats the why I need to perform all the tasks from a workstations. Thanks a lot!

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• Windows Server firewall asking for advice

  - by George2

  Hello everyone, I have Windows Server 2003/2008 machine, and I deployed some application on this machine. I want to put this machine in a sandbox environment, which means I want this machine to be able to access only proxy/gateway, its private used SQL Server database server, and I want to avoid network access from this machine to other machines in lab server room. Any easy solutions? BTW: my current environment is, I have a server which runs some Beta software in a Lab server room. It connects internet through proxy/gateway. Since the software is Beta, I want to reduce the risk of being hacked from internet and controlled by hacking sofwtare to attack my other servers in the same Lab server. thanks in advance, George

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• Windows 7 Multi Monitor RDC

  - by Peter Stegnar

  I would like to use all my monitors for the remote session (an option in RDC dialogue) if I connect (from Windows 7) to the one server with Windows 2008 R2 it works OK (I have remote connection on my all monitors) when do I connect to the another server with Windows 7 it just wound not use all my monitors, but just one (full screen mode). What do I missing here? Some setting on the Windows 7 server?

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• DNS and DHCP dies after ~2 days of use on ClearOS

  - by TheLQ

  I'm using ClearOS (based on CentOS, so any info specific to it should apply here) as a gateway, DHCP, and DNS server. I had this server running perfectly for a month or two before replacing it with another server. However due DNS and DHCP failing 2 days in and a host of other performance issues (the box was a little underpowered), I changed back to the origional server. However 2 days in DHCP and DNS are failing again, and I'm out of idea's on why. In both cases to my knowledge no network or server changes occurred after installation. Right after installing (and at least a day in) DNS and DHCP was working just fine. However later (Day 2) I get a call saying their internet is down (translation: Nobody can get to websites because DNS is down) I've tried to fix the problem by checking if the dnsmasq is even running (it is), restarting the service, and restarting the server to no effect. I do have two internal servers that have static DHCP leases but one's lease must of expired as I can't connect to it anymore. I'm hesitant to do any dhcp testing on the last server as I'll not be able to connect to it anymore. Is there anything anyone can think of on why DNS and DHCP would fail 2 days in to running perfectly? More info: Running dnsmasq in debug mode. This is all that's displayed even when running nslookup quackwall. I'm not sure though if nslookup commands should show up in the log [root@quackwall ~]# /usr/sbin/dnsmasq -dq dnsmasq: started, version 2.49 cachesize 150 dnsmasq: compile time options: IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP dnsmasq-dhcp: DHCP, IP range 10.0.0.100 -- 10.0.0.254, lease time 12h dnsmasq: reading /etc/resolv.conf dnsmasq: using nameserver 74.128.17.114#53 dnsmasq: using nameserver 74.128.19.102#53 dnsmasq: read /etc/hosts - 5 addresses dnsmasq-dhcp: read /etc/ethers - 2 addresses On the other server DNS and the Gateway are all configured correctly (10.0.0.2 is quackwall) lordquackstar@quackgame:~$ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.0.0.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0 0.0.0.0 10.0.0.2 0.0.0.0 UG 0 0 0 eth0 lordquackstar@quackgame:~$ cat /etc/resolv.conf nameserver 10.0.0.2 domain highwow.lan search highwow.lan

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• SVN Backup using rsync command

  - by user37143

  Hi, I setup a cron for taking backup of my SVN repo( 8 GB) to another server. But some times I get errors and I feel that this is not the proper way to back an svn to a remote server. I used the command rsync -avz myrepo. Please suggest me a good way to do svn backup to a remote server. I cannot zip the files and transfer it daily since it's 7 GB. Thanks

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• Find permission problem on Windows 2003

  - by Tomas

  Hello, I am trying to run process(console executable) on remote PC from asp.net application using WMI and get "Access is denied" problem. I have checked all event viewer logs on remote PC, no information related this. Where do I start searching for problem? Does Windows has some kind of permission monitor tool? Also I have tried to use Procmon.exe but hard to understand what to search, my process even do not listed in Procmon. Regards, Tomas

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• rdiff-backup command to restore

  - by Hulk

  Let say i have a source directory which contains The contents /foo/a /foo/b(These are the files in a directory on a remote system) using rdiff command i make a backup as rdiff-backup [email protected]::/foo backups And a,b are now present in my backups directory.And then i delete file a from the remote system and again i do a sync so my local directory has the file b only. My question is that how do i restore file a if the deletion and sync is done on the same day Thanks..

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• What "pieces" are needed in order to set up a cluster of physical servers?

  - by Chris Dutrow

  Background: Currently, we use Rackspace cloud servers. We have no intention to stop using them, but would like to look into setting up a cluster of physical servers (probably desktop computers in the $400 range with 8gb memory each) to offset some of our load and work as a secondary, more powerful, less reliable system. To put things in perspective, we can buy comparable desktop computers for the same price as we pay in one month to rent them on Rackspace Cloud. I understand that this is generally a dumb idea. However, in this particular instance, the server cluster is needed for its computation power. It is not mission-critical, it does not host a consumer-facing website, and if it goes down for a day or two, its not really a problem. Currently, we have access to business class verizon fios. If I understand correctly, we can get at least 25 dedicated IP addresses with this service, this should be enough. Requirements: Each server runs Linux Centos 6.3 Some of the servers run Python and execute processes from a task queue (Redis or RabbitMQ) Some of the servers are capable of serving static files and Python driven REST APIs Some of the servers host a Cassandra database cluster One or more of the servers are a Redis database servers One or more of the servers are PostgreSQL servers Questions: What kind of router or switch is needed? We would like the computers to be able to communicate effectively with each other via internal IP addresses. This is especially important for communicating with servers hosting Redis that need to be able to respond to requests very quickly. Are there special switches or routers that need to be used to connect the servers together? Are Desktop computers ok for this? We have found that we are mostly RAM-bottle necked, I understand that some servers have highly superior CPUs, but I'm not sure we need CPU power as much as we need RAM, which is cheap in Desktop computers. Will we have problems with the WIFI cards in the desktops or any other unexpected hardware limitation? What tools should be used to "image" the servers. For example, when we get an installation right for a Redis server or Cassandra node, are there tools that come with Linux Centos 6.3 to image the server to a USB drive or something like that? Or do we need to use some other software for this? What other things are we missing that we should be concerned about? Thanks so much!

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• Motorola SBG6850 / Linksys WRT54G network problem

  - by user96407

  I am trying to resolve issues with connecting my desktop and LAN capable printer to my network. I recently upgrade to the Motorola Cable Modem Gateway SBG6580 and have TWC coming into it, this works great for wired and wireless connectivity. Although, I am unable to connect to my device from this modem gateway. So, I am trying to cable a Linksys WRT54G (firmware 4.21.4 build 0) to the backside of the SBG6850 so I can use my printer on my network from both my wired desktop and wireless devices. I am pulling wireless off of the SBG6580 and do not want to change this. I have disable the wireless feature on the Linksys WRT54G at this moment. Can someone please help me through this dilemma? I am open to both wired and wireless solutions, but please tell me which approach your sharing in the first line of your response. Cheers!

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• Mac OSX Server 10.6 DNS Issues

  - by dallasclark

  Hi, The server was upgraded from 10.5 from 10.6, during the upgrade the Reverse Zones were lost so I tried to recreate these but found that it's best to delete all zones, definitions and start again. So I've started again and Reverse Zones are appearing but I'm still having issues. I receive the following errors (if they help) 01-Nov-2010 12:52:01.254 client 192.168.1.52#57051: view com.apple.ServerAdmin.DNS.public: query (cache) 'server.dev.home.gateway/A/IN' denied 01-Nov-2010 12:59:24.487 client 192.168.1.52#52858: view com.apple.ServerAdmin.DNS.public: query (cache) 'earth.server.dev.home.gateway/A/IN' denied At the moment I have the following setup in the DNS 1.168.192.in-addr.arpa. Reverse Zone 192.168.1.100 Reverse Mapping MacPro-Server.local. server.dev. Primary Zone server.dev. Machine 192.168.1.100 earth.server.dev. Alias server.dev.

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• Internal USB A Female to motherboard 4-pin that mounts internally

  - by rockinthesixstring

  I'm wondering if anyone knows of a product like this but that is physically mountable internally rather than on a cable? I'm planning on building a super low profile "gateway" pc that is dedicated to handling internet traffic in my home. I have a great 1U rackmountable chassis for an ITX motherboard, but I need the hard drive real estate for the additional NIC required to run a gateway (one onboard and one PCI). So the plan is to use a small 8GB USB Jump Drive for the OS inside the box (as to not have one hanging out the back. And although it's racked, I still don't want the jump drive flopping around internally, so I want it fixed somehow. I have an alternative idea where by I use a flush mount zap strap saddle and a zip tie to hold it in place, but that seems kind of like a hack.

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• Network Configuration

  - by Dario

  Hello, This is my situation: Router A: IP 192.168.1.1 Mask 192.168.1.0/24 - Connected to the internet. Server: - Interface eth0: inet addr:10.1.1.125 Mask:255.255.255.0 (connected to router B) - Interface ra0: inet addr:192.168.1.125 Mask:255.255.255.0 (connected to router A) Router B: IP 10.1.1.254 Mask 10.1.1.0/24 - Connected to Server's eth0 Computer: connected to Router B via WiFi connection. I configured a static route on Router B that use as default gateway 192.168.1.125 and i can ping that ip from computer. The problem is: how i can connect to the internet ? In other words, traffic coming from Server eth0 should use ra0 as gateway. Any suggestion ? Thank you

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• Mount network drives over ssh on Windows

  - by petersohn

  There is a remote filesystem I can reach through ssh. On Linux, there are several ways of dealing with it. I like sshfs, because with it I can work with the remote files the same way as with my local files. Is there any similar to Windows, that can map a network drive through ssh? The best I can use is WinSCP, which is good, but not good enough.

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• How do I configure OpenVPN for accessing the internet with one NIC?

  - by Lekensteyn

  I've been trying to get OpenVPN to work for three days. After reading many questions, the HOWTO, the FAQ and even parts of a guide to Linux networking, I cannot get my an Internet connection to the Internet. I'm trying to set up a OpenVPN server on a VPS, which will be used for: secure access to the Internet bypassing port restrictions (directadmin/2222 for example) an IPv6 connection (my client does only have IPv4 connectivity, while the VPS has both IPv4 and native IPv6 connectivity) (if possible) I can connect to my server and access the machine (HTTP), but Internet connectivity fails completely. I'm using ping 8.8.8.8 for testing whether my connection works or not. Using tcpdump and iptables -t nat -A POSTROUTING -j LOG, I can confirm that the packets reach my server. If I ping to 8.8.8.8 on the VPS, I get an echo-reply from 8.8.8.8 as expected. When pinging from the client, I do not get an echo-reply. The VPS has only one NIC: etho. It runs on Xen. Summary: I want to have a secure connection between my laptop and the Internet using OpenVPN. If that works, I want to have IPv6 connectivity as well. Network setup and software: Home laptop (eth0: 192.168.2.10) (tap0: 10.8.0.2) | | (running Kubuntu 10.10; OpenVPN 2.1.0-3ubuntu1) | wifi | router/gateway (gateway 192.168.2.1) | INTERNET | VPS (eth0:1.2.3.4) (gateway, tap0: 10.8.0.1) (running Debian 6; OpenVPN 2.1.3-2) wifi and my home router should not cause problems since all traffic goes encrypted over UDP port 1194. I've turned IP forwarding on: # echo 1 > /proc/sys/net/ipv4/ip_forward iptables has been configured to allow forwarding traffic as well: iptables -F FORWARD iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -s 10.8.0.0/24 -j ACCEPT iptables -A FORWARD -j DROP I've tried each of these rules separately without luck (flushing the chains before executing): iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j SNAT --to 1.2.3.4 iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE route -n before (server): 1.2.3.4 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0.0.0.0 1.2.3.4 0.0.0.0 UG 0 0 0 eth0 route -n after (server): 1.2.3.4 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.8.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 0.0.0.0 1.2.3.4 0.0.0.0 UG 0 0 0 eth0 route -n before (client): 192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 wlan0 route -n after (client): 1.2.3.4 192.168.2.1 255.255.255.255 UGH 0 0 0 wlan0 10.8.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0 0.0.0.0 10.8.0.1 128.0.0.0 UG 0 0 0 tap0 128.0.0.0 10.8.0.1 128.0.0.0 UG 0 0 0 tap0 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 wlan0 SERVER config proto udp dev tap ca ca.crt cert server.crt key server.key dh dh1024.pem server 10.8.0.0 255.255.255.0 push "redirect-gateway def1" ifconfig-pool-persist ipp.txt keepalive 10 120 tls-auth ta.key 0 comp-lzo user nobody group nobody persist-key persist-tun log-append openvpn-log verb 3 mute 10 CLIENT config dev tap proto udp remote 1.2.3.4 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client.crt key client.key ns-cert-type server tls-auth ta.key 1 comp-lzo verb 3 mute 20 traceroute 8.8.8.8 works as expected (similar output without OpenVPN activated): 1 10.8.0.1 (10.8.0.1) 24.276 ms 26.891 ms 29.454 ms 2 gw03.sbp.directvps.nl (178.21.112.1) 31.161 ms 31.890 ms 34.458 ms 3 ge0-v0652.cr0.nik-ams.nl.as8312.net (195.210.57.105) 35.353 ms 36.874 ms 38.403 ms 4 ge0-v3900.cr0.nik-ams.nl.as8312.net (195.210.57.53) 41.311 ms 41.561 ms 43.006 ms 5 * * * 6 209.85.248.88 (209.85.248.88) 147.061 ms 36.931 ms 28.063 ms 7 216.239.49.36 (216.239.49.36) 31.109 ms 33.292 ms 216.239.49.28 (216.239.49.28) 64.723 ms 8 209.85.255.130 (209.85.255.130) 49.350 ms 209.85.255.126 (209.85.255.126) 49.619 ms 209.85.255.122 (209.85.255.122) 52.416 ms 9 google-public-dns-a.google.com (8.8.8.8) 41.266 ms 44.054 ms 44.730 ms If you have any suggestions, please comment or answer. Thanks in advance.

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• LS command for torrent files

  - by amir-beygi

  Hi all I have a directory full of torrent files,and i have to download all of them; But the problem is i have disk limit in my remote server,and file sizes are vary(100MB~8GB) and if i add all of torrent files ,none of them would be download completely;So i need a command to list all my torrents and the size of them , to be selected and add to download list later . NOTE: REMOTE SERVER - LINUX_UBUNTU_9.10 // SSH So i need a command like torrentls That output somethings like: file1.torrent 1111MB file2.torrent 222MB file3.torrent 3333MB file4.torrent 444MB file5.torrent 5555MB

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• Database OR Array

  - by rezoner

  What is the exact point of using external database system if I have simple relations (95% querries are dependant on ID). I am storing users and their stats. Why would I use external database if I can have neat constructions like: db.users[32] = something Array of 500K users is not that big effort for RAM Pros are: no problematic asynchronity (instant results) easy export/import dealing with database like with a native object LITERALLY ps. and considerations: Would it be faster or slower to do collection[3] than db.query("select ... I am going to store it as a file/s There is only ONE application/process accessing this data, and the code is executed line by line - please don't elaborate about locking. Please don't answer with database propositions but why to use external DB over native array/object - I have experience in a few databases - that's not the case. What I am building is a client/gateway/server(s) game. Gateway deals with all users data, processing, authenticating, writing statistics e.t.c No other part of software needs to access directly to this data/database.

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• Does psexec support input redirection?

  - by aknuds1

  I am trying to control a remote Python script, which reads commands from stdin, via psexec 1.98, but I need to redirect psexec's input since psexec itself will be launched from another program. However, I have no luck making psexec accept redirected input. Is it supposed to work at all? An example of what I'm trying to do, where input is a file containing input to the remote script: psexec \\mymachine python c:\script.py < input

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• ssh-keygen works for root only?

  - by Hulk

  Does ssh-keygen -t rsa work if only set for root user i.e, if the username on local system is sodium and i generate the key using the above said command and on the remote system if i place the key in /root/.ssh authorized_keys ,this works. But on the remote system if the key is placed in /home/natrium/.ssh authorized_keys This still prompts for a password.Is this the expected behavior or is that some thing wrong in the above procedure Thanks..

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• Need help w/ rsync

  - by user71106

  I need some help getting my rync command syntax working. I need to clone the /home/user/public_html folder on a remote server to the server I am logged into via SSH, copying the folder into the same exact path on this local machine. I have root on the local machine I'm in session on and a user account shell on the remote machine. I'm not clear on where to put the SSH login info and how to define the folder paths.

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• TortoiseGit with non-default SSH port

  - by pek

  Hello, I have successfully setup gitosis on my server thanks to this helpful howto. Versions: Server: CentOS 5 Desktop: Windows 7 Git (on Desktop): 1.6.5.1.1367.gcd48 Client: TortoiseGit 1.3.2.0 (with msysgit 1.6.1) How can I clone a Git repository from my server when my SSH port is non the default (22)? I believe that the URL ssh://[email protected]:3031/gitosis-admin.git works, but I get: '/gitosis-admin.git' does not appear to be a git repository Thank you.

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• How can I make a command sent through ssh die if the ssh connection is killed?

  - by Jean-Francois Chevrette

  When using SSH to send a command to a remote server, if the SSH connection dies the process keeps running. Are there any ways to have it kill the child processes if the SSH connection ends? Example: root@local:~# ssh root@server sleep 100 & [2] 15762 root@local:~# kill 15762 [2]+ Stopped ssh root@server sleep 100 After running the above, the sleep command is still running on the remote host. Any ideas?

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• Copying files with SSH

  - by Deniz Zoeteman

  I am trying to copy a file from my other computer, to another computer. (both running Ubuntu 9.10) So say: I've ssh'ed into the other computer; i 'cd' to the directory; and i entered cp File.zip /home/me/Desktop as file.zip is located in the directory i just used cd with. Now, it gives me the following error message: cannot create regular file '/home/me/Desktop': no such file or directory What do i have to do?

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• Screen is greyed out after power failure shutdown: Mac OSX

  - by Don MacLachlan

  When the battery power is down and the unit not plugged in the computer is forced into a sleep mode requiring pushing the start button when power is re-connected. The initial desktop screen appears to be greyed out and is unresponsive with a timer bar which, when the timing sequence is complete restores an active desktop. I can't find any reference to this phenomenon in the OSX literature I have. Any pointers to where I can get more information? Perhaps I am using the wrong search criteria?

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• start application as administrator using psxec

  - by Sen

  I use psexec to run a batch script on remote machines.The batch script is used to setup my web application and starts and stops IIS during setup. The script works fine but it fails while stopping and starting IIS.The account I use for remote connection is an admin on that box. Could someone tell me how to start to start the script as an administrtor using psexec?

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