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• Configure Postfix to Port other than 25

  - by bwheeler96

  I've done quite a bit of googling on how to reconfigure postfix to work on a different port, but I still can't fond the line(s) people keep talking about in my master.cf. I'm using OS X Mountain Lion, and my ISP blocks traffic both ways on port 25. people have said to look for a line that says smtp inet n - n - - smtpd I can't find it. This is (what I believe to be) unmodified # ==== Begin auto-generated section ======================================== # This section of the master.cf file is auto-generated by the Server Admin # Mail backend plugin whenever mails settings are modified. smtp inet n - n - 1 postscreen smtpd pass - - n - - smtpd dnsblog unix - - n - 0 dnsblog tlsproxy unix - - n - 0 tlsproxy submission inet n - n - - smtpd -o smtpd_tls_security_level=encrypt smtp unix - - n - - smtp # === End auto-generated section =========================================== # Modern SMTP clients communicate securely over port 25 using the STARTTLS command. # Some older clients, such as Outlook 2000 and its predecessors, do not properly # support this command and instead assume a preconfigured secure connection # on port 465. This was sometimes called "smtps", but such usage was never # approved by the IANA and therefore conflicts with another, legitimate assignment. # For more details about managing secure SMTP connections with postfix, please see: # http://www.postfix.org/TLS_README.html # To read more about configuring secure connections with Outlook 2000, please read: # http://support.microsoft.com/default.aspx?scid=kb;en-us;Q307772 # Apple does not support the use of port 465 for this purpose. # After determining that connecting clients do require this behavior, you may choose # to manually enable support for these older clients by uncommenting the following # four lines. #465 inet n - n - - smtpd # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - n - - smtp pickup fifo n - n 60 1 pickup cleanup unix n - n - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - n 300 1 oqmgr tlsmgr unix - - n 1000? 1 tlsmgr rewrite unix - - n - - trivial-rewrite bounce unix - - n - 0 bounce defer unix - - n - 0 bounce trace unix - - n - 0 bounce verify unix - - n - 1 verify sacl-cache unix - - n - 1 sacl-cache flush unix n - n 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - n - - smtp -o smtp_fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - n - - showq error unix - - n - - error retry unix - - n - - error discard unix - - n - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - n - - lmtp anvil unix - - n - 1 anvil scache unix - - n - 1 scache # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants.

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• Creating Acer Recovery DVD to ISO - No Optical Drive

  - by alex

  I have an acer travelmate laptop that i'm trying to create the recovery dvd(s) for. I am stuck at this screen: This machine doesn't have an optical drive. Sure, I could connect an external one - but ideally I want to store these 3 DVDs as ISO files on my network (as not to create clutter) Is there a way of mapping a "virtual" optical drive, to save the written to contents as ISO?

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• EC2 Filesystem / Files stored on the wrong partiton after launching new instance from AMI

  - by Philip Isaacs

  Today I set up a new EC2 Instance from and AMI I created from an older EC2 instance. When I launched the new instance I took the AMI that was on a small instance and launched with a medium instance. From what I can tell this is pretty standard stuff. But here's the stang part. According to AWS these are the differences Small Instance (Default) 1.7 GB of memory, 1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit), 160 GB of local instance storage, 32-bit or 64-bit platform Medium Instance 3.75 GB of memory, 2 EC2 Compute Units (1 virtual core with 2 EC2 Compute Units each), 410 GB of local instance storage, 32-bit or 64-bit platform Okay now here's where I'm having an issue. I when I log into the new bigger instance it still reports only having 1.7 GB of ram. The other strange part is that all my old partitions are still their in the same configurations. I see a new larger partition /mnt which is essential empty. Filesystem Size Used Avail Use% Mounted on /dev/sda1 7.9G 5.9G 1.6G 79% / none 846M 120K 846M 1% /dev none 879M 0 879M 0% /dev/shm none 879M 76K 878M 1% /var/run none 879M 0 879M 0% /var/lock none 879M 0 879M 0% /lib/init/rw /dev/sda2 335G 195M 318G 1% /mnt /dev/sdf 16G 9.9G 5.1G 67% /var2 This EC2 is a web server and I was serving files off the /var2 directory but for some reason the instance is storing everything on / Okay here's what I'd like to do. Move all my website files to /mnt and have the web server point to that. Any suggestions? If it helps here is what my fstab looks like as well. root@myserver:/var# mount -l /dev/sda1 on / type ext3 (rw) [cloudimg-rootfs] proc on /proc type proc (rw,noexec,nosuid,nodev) none on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) none on /dev type devtmpfs (rw,mode=0755) none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) none on /dev/shm type tmpfs (rw,nosuid,nodev) none on /var/run type tmpfs (rw,nosuid,mode=0755) none on /var/lock type tmpfs (rw,noexec,nosuid,nodev) none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) /dev/sda2 on /mnt type ext3 (rw) /dev/sdf on /var2 type ext4 (rw,noatime) I hope this question makes sense. Basically i want my old files on this new partition. Thanks in advance

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• Receiving 500 internal server error installing WordPress on IIS 7 at GoDaddy

  - by user17176

  Hello, I have a virtual shared hosting plan on GoDaddy. I am trying to setup WordPress on it. However, whenever I run /wp-admin/install.php I receive an internal 500 error. What would cause this? I'm totally lost. I didn't think this would be difficult to get setup. Thank you for your help!

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• What are the pros and cons of using Microsoft's own SMTP server versus a third party one?

  - by CGK

  I need to setup a SMTP relay for some web applications that need to send email to its users. I've used hMailServer for that task previously, but I'm thinking of switching to IIS SMTP Virtual Server. What are the pros and cons of using Microsoft's own SMTP server versus a third party one?

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• How do I setup a cloud server to share and sync files on ESXi hosted environment?

  - by Manoj Agarwal

  I want to setup my private cloud network for my company for syncing and sharing files. Instead of using existing players like dropbox, google drive, amazon etc. I want to setup my own cloud infrastructure. The requirement is to easily share private data internally within the organization. I already have an ESXi based cloud environment, running several virtual machines in it. Will it be feasible and achievable?

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• Capture traffic from SPAN and send it to a HyperV VM

  - by Josh Brower

  On a Server 2008 SP2 HyperV VM, I am trying to capture traffic from a SPAN. I know the SPAN is working, as I am able to capture the traffic on the Host OS, but when I try and capture traffic on the VM, with the SPAN being sent to a virtual adapter, I cannot seem to get it to work-- After doing some Googling, I have found that it might be because HyperV NICs cannot be put into promiscuous mode. (?) Any other thoughts? -Josh

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• Create an AWS HVM Linux AMI from an Existing Paravirtual Linux AMI

  - by javacavaj

  Is it possible to create a hardware virtual machine (HVM) AMI from an existing paravirtual (PV) AMI. My initially thought was to start a new PV instance and use the ec2-create-image command to create a new image while specifying HVM as the virutalization type. However, ec2-create-image does not have a command line parameter to specify the virtualization type. Is there another way to go about doing this?

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• Printing to a Windows 7 incompatible printer shared on supported Windows XP machine

  - by MGSoto

  I have an HP Laserjet 1500 that is supported by Windows XP, but not supported by Windows-7. I want to print from my 7 machine(s) to my XP machine on this printer. Is there some sort of way to send a generic job (like sending raw postscript or something) to the XP machine, which will then print it with the proper drivers? Is there a virtual printer that has drivers for both XP and 7 that will just re-print it on the XP machine using the real printer?

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• Assign fixed IP address via DHCP by DNS lookup

  - by Janoszen

  Preface I'm building a virtualization environment with Ubuntu 14.04 and LXC. I don't want to write my own template since the upgrade from 12.04 to 14.04 has shown that backwards compatibility is not guaranteed. Therefore I'm deploying my virtual machines via lxc-create, using the default Ubuntu template. The DNS for the servers is provided by Amazon Route 53, so no local DNS server is needed. I also use Puppet to configure my servers, so I want to keep the manual effort on the deployment minimal. Now, the default Ubuntu template assigns IP addresses via DHCP. Therefore, I need a local DHCP server to assign IP addresses to the nodes, so I can SSH into them and get Puppet running. Since Puppet requires a proper DNS setup, assigning temporary IP addresses is not an option, the client needs to get the right hostname and IP address from the start. Question What DHCP server do I use and how do I get it to assign the IP address based only on the host-name DHCP option by performing a DNS lookup on that very host name? What I've tried I tried to make it work using the ISC DHCP server, however, the manual clearly states: Please be aware that only the dhcp-client-identifier option and the hardware address can be used to match a host declaration, or the host-identifier option parameter for DHCPv6 servers. For example, it is not possible to match a host declaration to a host-name option. This is because the host-name option cannot be guaranteed to be unique for any given client, whereas both the hardware address and dhcp-client-identifier option are at least theoretically guaranteed to be unique to a given client. I also tried to create a class that matches the hostname like this: class "my-client-name" { match if option host-name = "my-client-name"; fixed-address my-client-name.my-domain.com; } Unfortunately the fixed-address option is not allowed in class statements. I can replace it with a 1-size pool, which works as expected: subnet 10.103.0.0 netmask 255.255.0.0 { option routers 10.103.1.1; class "my-client-name" { match if option host-name = "my-client-name"; } pool { allow members of "my-client-name"; range 10.103.1.2 10.103.1.2; } } However, this would require me to administer the IP addresses in two places (Amazon Route53 and the DHCP server), which I would prefer not to do. About security Since this is only used in the bootstrapping phase on an internal network and is then replaced by a static network configuration by Puppet, this shouldn't be an issue from a security standpoint. I am, however, aware that the virtual machine bootstraps with "ubuntu:ubuntu" credentials, which I intend to fix once this is running.

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• use ubuntu server 10.4 as a virtulization server as esx from VMWare

  - by hitham

  i was wondering if its possible to use Ubuntu server as virtualization center as esxi vmware i am asking this coz i read this in ubuntu website: " Ubuntu includes a Virtual Machine Builder which makes this process simple and replicable allowing multiple pre-configured machines to be deployed instantly ". if its possible how can i do such thing ?. with all respect . Hitham Melhem

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• ISA 2006 Ent with NLB configuration

  - by Nagori

  Hello We have created to virtual machines and installed ISA 2006 Ent and enable NLB configuration, each machine has two NIC one connected to LAN and other connected to DMZ, we are not able to ping DMZ subnet IP of ISA from another machine which is on same DMZ subnet even though we have diable the all ISA services (including firewall). But we can ping LAN IP from all our internal subnets and this ping is working with ISA services are started or stop status Thank you

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• How to boot linux direct to application on console with no login

  - by amanda

  I have a need to start an application on bootup on the linux console and I do not have a need for any type of login or security. I do not need any ALT-F1,F2,etc virtual consoles but I would like to allow SSH access via the network port for debugging, loading, etc. The application is a SDL graphics program running with fbcon as the SDL_VIDEODRIVER if that matters. I'm currently using Fedora 10 and 12 but any distro that supports SDL using the fbcon framebuffer would be acceptable.

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• Server Names Inside Private Network

  - by thyandrecardoso

  Our office has a private network, where any requests on a (pre-determined) public IP are forwarded to a private IP inside said network. On that private IP, we've got a server running several services, including HTTP servers, and SCM systems. We only control our private network, having no control on the public IP configuration. We bought a domain name, and pointed it to that public IP, so people can access our services from the outside. But, when inside the office, people can't use that DNS name, because the server and any other hosts inside the network share the same public IP! For desktops, inside the office network, dealing with names is really easy: one entry on the hosts file and we're done. However, for laptops, that keep going in and out, and need to access services inside the office, the naming is really annoying. I don't know the "standard" process for dealing with these kind of situations. I've considered installing BIND in the office, and make people configure their wireless and wired connections to use that DNS server. What is the correct approach in this situation? If using BIND (or any other DNS server) is the answer, how should I configure it so that people inside the office can use it to get our custom names, and get forwarded to the ISP DNS when trying to reach the internet?

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• Cloud hosting for windows domain controller, possible?

  - by Preet Sangha

  We currently host our own domain controller (small company) locally on dedicated h/w. However to mitigate disaster recovery we're considering the use of virtualisation and cloud hosting. One thought is Virtual primary domain controller hosted in the cloud + a local (secondary) virtualised server running in the office as a cache? Is this possible or should I consider something else? We're happy to pay for the decent hosting and DR but this is really out of my experience.

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• Allowing access to subnets openvpn access server

  - by user3882976

  I have a centos server running a openvpn access server. On that server I am running a windows server in virtual box. On the centos server I am running the vpn with a network address 172.27.224.0 with 20 bits. The windows server is running a dchp server giving ip's of 192.168.1.0-200. When i try to connect to the widows shared folder from the vpn i can't using the name of the server but i can from the ip.

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• Is Windows Server 2008R2 NAP solution for NAC (endpoint security) valuable enough to be worth the hassles?

  - by Warren P

  I'm learning about Windows Server 2008 R2's NAP features. I understand what network access control (NAC) is and what role NAP plays in that, but I would like to know what limitations and problems it has, that people wish they knew before they rolled it out. Secondly, I'd like to know if anyone has had success rolling it out in a mid-size (multi-city corporate network with around 15 servers, 200 desktops) environment with most (99%) Windows XP SP3 and newer Windows clients (Vista, and Win7). Did it work with your anti-virus? (I'm guessing NAP works well with the big name anti-virus products, but we're using Trend micro.). Let's assume that the servers are all Windows Server 2008 R2. Our VPNs are cisco stuff, and have their own NAC features. Has NAP actually benefitted your organization, and was it wise to roll it out, or is it yet another in the long list of things that Windows Server 2008 R2 does, but that if you do move your servers up to it, you're probably not going to want to use. In what particular ways might the built-in NAP solution be the best one, and in what particular ways might no solution at all (the status quo pre-NAP) or a third-party endpoint security or NAC solution be considered a better fit? I found an article where a panel of security experts in 2007 say NAC is maybe "not worth it". Are things better now in 2010 with Win Server 2008 R2?

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• Best way to monitor a Grid of computers?

  - by marc.riera

  I've installed Sun Grid Engine on 10 nodes, and one virtual master host. Now I have to monitor all the resources prior to launching it into production, but I don't know which is the best way. I've tried using xml-qstat, but it seems unstable. Any tips or suggestions? Anyone got experience on this? thanks.

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• iso is already present on server

  - by andygriff

  Hi, I'm using SCVMM R2 with Windows 2008 R2 hosts. I've noticed that if I have an iso mounted on a vm from the scvmm library and then a snapshot is restored then you always get an error .iso is already present on server when trying add it again. I know you can log onto the Host and delete the iso from the Virtual Machine foler but that will be a nigthmare in a 200 VM strong implimentation. is there another way?

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• Does Windows 7 RC handle non Windows Media Center remotes yet?

  - by zillion

  I'm mostly a Linux geek, but while I will be trying to make my first Arch Linux installation in a virtual machine to learn and make my installation script for the true install, I need a simple OS and Windows 7 was better than Windows XP Media Center cause Media Center is outdated on XP. I tested it has a beta but my Hauppauge wintv-pvr usb2 remote wasn't working but the tv-tuner worked well and I haven't tested Windows XP Mode and my printer Epson Stylus Photo R300. Do someone know this hardware and if the XP Mode is easily supported?

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• Upgrade from Windows Home Server to Windows Server 2008?

  - by Rohan West

  Hi there, I was thinking about purchasing a HP StorageWorks X510 Data Vault to use as a general purpose media server. I noticed that the system uses Microsoft Windows Home Server, would it be possible to upgrade to Windows Server 2008? Eventually, I would like to run a few virtual machines on the server.

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• Any online network topology to study?

  - by Gok Demir

  I want to study network. But I don't have an access to a sample network (routers, DNS, IP4, IP6 windows linux mixed heterogenous system). Do you know any online network to study (Free as possible). Is it possible to simulate network topologies with a sing PC using virtual machine. If so could you guide me?

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• Why my vmware server was shutdown suddenly?

  - by Dave

  Is there anyway to investigate why my vmware server virtual machines were all suddenly shutdown? Any logs i can check on?

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• Custom initrd init script: how to create /dev/initctl

  - by Posco Grubb

  I have a virtual machine (VMM is Xen 3.3) equipped with two IDE HDD's (/dev/hda and /dev/hdb). The root file system is in /dev/hda1, where Scientific Linux 5.4 is installed. /dev/hdb contains an empty ext2 file system. I want to protect the root file system from writes by the VM by using aufs (AnotherUnionFS) to layer a writable file system on top of the root file system. The changes to / will be written to the file system located on /dev/hdb. (Furthermore, outside the VM, the file backing the /dev/hda will also be set to read-only permissions, so the VMM should also prevent the VM from modifying at that level.) (The purpose of this setup: be able to corrupt a virtual machine using software-implemented fault injection but preserve the file system image in order to quickly reboot the VM to a fault-free state.) How do I get an initrd init script to do the necessary mounts to create the union file system? I've tried 2 approaches: I've tried modifying the nash script that mkinitrd creates, but I don't know what setuproot and switchroot do and how to make them use my aufs as the new root. Apparently, nobody else here knows either. (EDIT: I take that back.) I've tried building a LiveCD (using linux-live-6.3.0) and then modifying the Bash /linuxrc script from the generated initrd, and I got the mounts correct, but the final /sbin/init complains about /dev/initctl. Specifically, my /linuxrc mounts the aufs at /union. The last few lines of /linuxrc effectively do the following: cd /union mkdir -p mnt/live pivot_root . mnt/live exec sbin/chroot . sbin/init </dev/console >/dev/console 2>&1 When init starts, it outputs something like init: /dev/initctl: No such file or directory. What is supposed to create this FIFO? I found no such filename in the original linuxrc and liblinuxlive scripts. I tried creating it via "mkfifo /dev/initctl", but then init complained about a timeout opening or writing to the FIFO. Would appreciate any help or pointers. Thanks.

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• Symantec Protection Suite Enterprise Edition

  - by rihatum

  We (our company) are planning to deploy Symantec Endpoint Protection and Symantec Desktop Recovery 2011 Desktop Edition to our 3000 - 4000 workstations (Windows7 32 and 64) with a few 100s with Windows XP 32/64 Bit. I have read the implementation guide for SEP and have read tech-notes for Desktop Recovery 2011. Our team have planned to deploy this as follows : 1 x dedicated SQL 2008R2 for Symantec Endpoint Protection (Instead of using the Embedded Database) 1 x Dedicated SQL 2008R2 for Symantec Desktop Recovery 2011 (Instead of using the Embedded Database) 1 x Dedicated W2K8 R2 Box for the SEPM (Symantec Endpoint Protection Manager - Mgmt. APP) 1 x Dedicated W2K8 R2 Box for the Symantec Desktop Recovery 2011 Management Application Agent Deployment : As per Symantec Documentation for both of the above, an agent can be pushed via the Mgmt. Application (provided no firewalls are blocking ports required etc. - we have Windows firewall disabled already). Above is the initial plan we have for 3000 - 4000 client workstation (Windows) Now my Questions :-) a) If we had these users distributed amongst two sites with AD DC / GC in each site, How would I restrict SEPM and Desktop Mgmt. solution to only check for users in their respective site ? b) At present all users are under one building but we are going to move some dept. to a new location (with dedicated connectivity), How would we control which SEPM / MGMT Server is responsible for which site ? c) What Hardware would you recommend as a Server spec for the SQL server 16GB RAM, Dual XEON? d) What Hardware would you recommend as a Server spec for the MGMT Servers 16GB RAM each with DUAL xeon and sas disks? e) Also, how do you or would you recommend to protect these 4 servers (2 x SQL and 2 x MGMT Servers)? f) How would you recommend to store backups for these desktops? We do have a SAN and a NAS in our environment and we do have one spare DAS (Dell MD3000). If you have anything to add / correct - that will be really helpful before diving into the actual implementation phase. Will be most grateful with your suggestions, recommendations and corrections with above - Many Thanks ! Rihatum

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