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  • Windows: disable remote access of local drive, even by domain admin

    - by Matt
    We have a network of Windows 7 PCs that are managed as part of a domain. What we want is for the domain admin to be unable to view the PC's local drive (C:) unless he is physically at the PC. In other words, no remote desktop and no ability to use UNC. In other words, the domain admin should not be allowed to put \\user_pc\c$ in Windows Explorer and see all the files on that computer, unless he is physically present at the PC itself. Edit: to clarify some of the questions/comments that have come up. Yes, I am an admin---but a complete Windows novice. And yes, for the sake of this and my similar questions, it is fair to assume that I am working for someone who is paranoid. I understand the arguments about this being a "social problem versus a technical problem", and "you should be able to trust your admins", etc. But this is the situation in which I find myself. I'm basically new to Windows system administration, but am tasked with creating an environment that is secure by the company owner's definition---and this definition is clearly very different from what most people expect. In short, I understand that this is an unusual request. But I'm hoping there is enough expertise in the ServerFault community to point me in the right direction.

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  • Best Practices for adding Exchange Archive to current 3 server setup

    - by ADquestion
    I'm looking to add an Archive Database (which I know is just a Mailbox Database) to our current Exchange 2010 environment. I have done this in the past at a previous job, but we had a simpler setup than at this current job. I've been trying to find some best practices to make sure it's setup in an ideal way, but so far not finding the details I would prefer. Hoping someone on here can give me a few pointers. Currently we have a 3 server setup, Server1, Server2 and Server3. Three databases of course, DB1, DB2 and DB3. We have a DAG setup between them. Server1 has DB1 and DB3 on it, DB1 is not active, DB3 is active. Server2 has DB1 and DB2 on it, both are active. Server3 has DB2 and DB3 on it, both are not active. All three servers are virtual (VMware). Each one is setup identical to the other as follows: C:\ 60GB - OS E:\ 600GB - DB (currently only 90GB used, pointing to Datastore just for Server2) F:\ 200GB - Log (2GB used, pointing to same Datastore as above) G:\ 200GB - Restore (0 used, pointing to same Datastore as above) The drives are all set to Thin Provisioning, and it looks as though I have 600GB of available space. They have not been on Exchange that long and only have about 70GB worth of PSTs to import back in that will be going to the Archive Database, plus anything older than 2 years from their current inbox that will be moved into there. I was considering placing the Archive DB on the E:\ drive of Server3 (only) like the current DB, but wasn't sure if that was acceptable. I don't plan on setting the Archive DB up with the DAG, just plan on having it as a single repository for older emails and manually back it up every now and then. If anyone has any suggestions on this I would appreciate it the input. I've done it on a slightly smaller scale before and it worked well, but like to think it through before pulling the trigger, especially at a new job. :) Thanks again!

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  • Error during SSL installation cPanel/WHM

    - by baswoni
    I have a dedicated server and I am using the install wizard via WHM to install an SSL certificate. I have the following keys: Certificate key RSA private key CA certificate I paste these three elements into the wizard along with the domain, IP address and username but I get this error: SSL install aborted due to error: Unable to save certificate key. Certificate verification passed Have I missed a step? I have given it another go to make sure I am copying and pasting the info correctly and I am now getting the following error: SSL install aborted due to error: Sorry, you must have a dedicated ip to use this feature for the user: username! If you are intending to install a shared certificate you must use the username "nobody" for security and bandwidth reporting reasons. Even though I am using a dedicated IP address, I am getting this problem. I thought I would also add that this SSL certificate has been installed on a shared hosting environment with my previous hostig provider. The account with them is still active, however the domain and its contents now reside on the dedicated server - could this cause problems?

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  • xauth, ssh and missing home directory

    - by flolo
    We have several servers, and normaly everything works fine, except now... we get a new aircondition installed. This takes 36 hours and for this time almost all servers got shutdown, only 2 remaining servers run for the most important tasks (i.e. accepting incoming email, delivering some important websites, login-server). Everybody was informed that when they need appropiate data from the homedirs they should fetch it before take down. Long story short: Someone realized that he have run a certain program on one of the servers. No Problem, he can remote login into our login server and run the programm there without home directory (binaries are local and necessary information can be copied to the /tmp). That works like a charm until... ... the user needs to run a GUI programm. I find no easy way to make it running, usually ssh -Y honk@loginserver is enough but now the homedirectory is missing and ssh is not able to copy the cookies into ~/.Xauthority (as the file server with the home directories is down). Paranoid as all systemadmins all X-Server just listen locally not on tcp ports, so no remote X connection possible SSH config is waterproof - i.e. no way to set environment variables. My Problem is, that the generated proxy MIT cookie from ssh get lost as the .Xauthority doesnt exist. If I could retrieve it somehow I could reenter it a .Xauthority in /tmp. The only other option (besides changing the config) which came to my mind is, makeing a tunnel (netcat, or better ssh) from the remote host to the loginserver and copy the cookie manually (not sure if it the tcp-unix domain socket stuff works as expected). Any good suggestions (for the future - now our servers are already up)?

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  • Windows 2003 DC to Windows 2008 R2 DC with same name and same IP

    - by TheCleaner
    Environment = Windows 2003 native domain with 8 DCs I've got an old domain controller that is running 2003, CA Enterprise role, DHCP, DNS, a few GPO scripts that point to shares on it, and some other minor functions. All our servers point to it as their primary DNS, and there's lots of references to its IP or name throughout the domain at this point (8+ years later). I really don't feel like manually changing all of this, it would be a pretty massive undertaking. I want to follow this guide: http://msmvps.com/blogs/acefekay/archive/2010/10/09/remove-an-old-dc-and-introduce-a-new-dc-with-the-same-name-and-ip-address.aspx to hopefully end up with basically an "in-place upgrade" so to say. I considered just doing a P2V of the box, but we don't really want to keep it around running 2003 to be honest. I also considered using a CNAME and adding a 2nd IP (the old one) but again, it seemed like it would be cleaner using the attached link. My actual question: Any gotchas or big caution signs when doing what the link suggests? Anyone gone down this road and have advice on how to proceed?

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  • Standards for documenting/designing infrastructure

    - by Paul
    We have a moderately complex solution for which we need to construct a production environment. There are around a dozen components (and here I'm using a definition of "component" which means "can fail independently of other components" - e.g. an Apache server, a Weblogic web app, an ftp server, an ejabberd server, etc). There are a number of weblogic web apps - and one thing we need to decide is how many weblogic containers to run these web apps in. The system needs to be highly available, and communications in and out of the system are typically secured by SSL Our datacentre team will handle things like VLAN design, racking, server specification and build. So the kinds of decisions we still need to make are: How to map components to physical servers (and weblogic containers) Identify all communication paths, ensure all are either resilient or there's an "upstream" comms path that is resilient, and failover of that depends on all single-points of failure "downstream". Decide where to terminate SSL (on load balancers, or on Apache servers, for instance). My question isn't really about how to make the decisions, but whether there are any standards for documenting (especially in diagrams) the design questions and the design decisions. It seems odd, for instance, that Visio doesn't have a template for something like this - it has templates for more physical layout, and for more logical /software architecture diagrams. So right now I'm using a basic Visio diagram to represent each component, the commms between them with plans to augment this with hostnames, ports, whether each comms link is resilient etc, etc. This all feels like something that must been done many times before. Are there standards for documenting this?

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  • Joining new DC to AD - DNS name does not exist

    - by Andrew Connell
    I had a DC fail on me recently and trying to add a new one to my domain, although I'm sensing I might have other issues in my domain. I'm a dev at heart and know just enough about AD to be dangerous so looking for some assistance. My working DC is RIVERCITY-DC12. I'm trying to promote RIVERCITY-DC14 as a DC to the RIVERCITY domain, but when I run DCPROMO, at the NETWORK CREDENTIALS step where I point to the name of the domain (rivercity.local), I get "An AD DC for the domain rivercity.local cannot be contacted" and in the details see "The error was DNS name does not exist" Looking at RIVERCITY-DC12, I can see DNS is working, I've been able to query it from other machines in my domain, and no errors are reported in the DNS category within the Event Viewer. When I checked the FMSO roles, it shows RIVERCITY-DC12 is the machine for all listed roles. Not sure what I should do next or how to troubleshoot/investigate after searching around for a solution... ideas? Environment: Domain: rivercity (rivercity.local) Forest functional level: Windows 2000 (I'm more than happy to raise this) Windows Server 2008 All servers are Windows Server 2008 R2 SP1 (fully patched)

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  • What is the recommended glusterFS configuration for a growing website?

    - by montana
    Hello, I have a website that is tracking towards 50 million hits per day average, and within the next 3 months should be over 100 million hits per day. We are trying to use GlusterFS v 3.0.0 (with latest patches as of 1-17-2010) Currently, we've just upgraded to a load balancer environment that has 3 physical hosts with 6 Xen-Server 5.5u1 VM's (2 on each host) to serve webpage traffic. Each machine has 6 Raid-6 local storage drives (7200RPM-SATA). The old machine we came from had 1 mirrored SAS 10k drive. We also set up glusterFS currently with 3 bricks, one on each host, and it is serving the 6 VM's as clients. In testing, everything seemed fine. However when we went to production, it seemed that there just wasn't enough I/O's available to serve traffic even upwards of 15mil hits. Weeks prior, our old server was able to handle traffic, maxed out, at 20mil. Is there any recommended configurations for such an application, or things to be aware of that isn't apparent with their documentation at gluster.org for a site our size?

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  • Performance data collection for short-running, ephemeral servers

    - by ErikA
    We're building a medical image processing software stack, currently hosted on various AWS resources. As part of this application, we have a handful of long-running servers (database, load balancers, web application, etc.). Collecting performance data on those servers is quite simple - my go-to- recipe of Nagios (for monitoring/notifications) and Munin (for collection of performance data and displaying trends) will work just fine. However - as part of this application, we are constantly starting up and terminating compute instances on EC2. In typical usage, these compute instances start up, configure themselves, receive a job from a message queue, and then get to work processing that job, which takes anywhere from 15 minutes to over 8 hours. After job completion, these instances get terminated, never to be heard from again. What is a decent strategy for collecting performance data on these short-lived instances? I don't necessarily need monitoring on them - if they fail for whatever reason, our application will detect this and handle re-starting the job on another instance or raising the flag so an administrator can take a look at things. However, it still would be useful to collect information like CPU (user, idle, iowait, etc.), memory usage, network traffic, disk read/write data, etc. In our internal database, we track the instance ID of the machine that runs each job, and it would be quite helpful to be able to look up performance data for a specific instance ID for troubleshooting and profiling. Munin doesn't seem like a great candidate, as it requires maintaining a list of munin nodes in a text file - far from ideal for an environment with a high amount of churn, and for the short amount of time each node will be running, I'd rather keep the full-resolution data indefinitely than have RRD water down the data over time. In the end, my guess is that this will require a monitoring engine that: uses a database (MySQL, SQLite, etc.) for configuration and data storage exposes an API for adding/removing hosts and services Are there other things I should be thinking about when evaluating options? Perhaps I'm over-thinking this, though, and just ought to run sar at 1-minute intervals on these short-lived instances and collect the sar db files prior to termination.

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  • Trying to install datastax opscenter - Failed to load application: cannot import name _parse

    - by gansbrest
    I'm not familiar with python, maybe someone could explain what's going on here? ec2-user@prod-opscenter-01:~ % java -version java version "1.7.0_45" Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode) ec2-user@prod-opscenter-01:~ % python -V Python 2.6.8 ec2-user@prod-opscenter-01:~ % openssl version OpenSSL 1.0.1e-fips 11 Feb 2013 And now the error ec2-user@prod-opscenter-01:~ % sudo /etc/init.d/opscenterd start Starting Cassandra cluster manager opscenterd Starting opscenterdUnhandled Error Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 652, in run runApp(config) File "/usr/lib64/python2.6/site-packages/twisted/scripts/twistd.py", line 23, in runApp _SomeApplicationRunner(config).run() File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 386, in run self.application = self.createOrGetApplication() File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 451, in createOrGetApplication application = getApplication(self.config, passphrase) --- <exception caught here> --- File "/usr/lib64/python2.6/site-packages/twisted/application/app.py", line 462, in getApplication application = service.loadApplication(filename, style, passphrase) File "/usr/lib64/python2.6/site-packages/twisted/application/service.py", line 405, in loadApplication application = sob.loadValueFromFile(filename, 'application', passphrase) File "/usr/lib64/python2.6/site-packages/twisted/persisted/sob.py", line 210, in loadValueFromFile exec fileObj in d, d File "bin/start_opscenter.py", line 1, in <module> from opscenterd import opscenterd_tap File "/usr/lib/python2.6/site-packages/opscenterd/opscenterd_tap.py", line 37, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/OpsCenterdService.py", line 13, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/ClusterServices.py", line 22, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/WebServer.py", line 40, in <module> File "/usr/lib/python2.6/site-packages/opscenterd/Agents.py", line 18, in <module> exceptions.ImportError: cannot import name _parse Failed to load application: cannot import name _parse Maybe there are open source alternatives to monitoring cassandra I should look at? Thanks a lot

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  • Outlook signature distribution tools ?

    - by HannesFostie
    Hi We are soon changing our corporate identity, and as such we will need to change our outlook signatures. However, being some 125 people, my colleague sysadmin and I don't want to go around changing these manually, and are thus looking for a good way to do this fully automated. Most of our desktops are XP, with the exceptional few running Win7. Most run Outlook 2007, some run 2003. Our environment is AD-centered, and most of the information will come from AD (telephone number, title, ...). The biggest problem I can see so far is that because we are bilingual (Dutch and French), there will be 2 versions of the signature, depending on what the person has as main language. People currently do not have anything in AD to distinguish this, but we could create a group for it, or perhaps add some sort of attribute. A cheap if not free tool would be great. eMailSignature could probably do most, if not all, of this for us but it's a rather expensive tool costing some 1250 euro. We just want to distribute the signatures, actual "management" is less important as job titles don't change all that much. Any tips are welcome!

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  • Windows 7 hangs with 100% disk activity but only when online

    - by jeremy
    I have the same problem as seemingly many other people here, and I think we might all be experiencing the same issue: a compatibility issue in Windows 7 between hard drive and network controller or drivers. I've tried firmware updates of my entire board, wiping my drive and reinstalling from scratch. And yet the problem persists, which suggests it is an operating system error, as the hard drive checks out 100% physically. Additionally, the only time it does not occur is when in safe mode WITHOUT networking. With networking, there are spikes in disc access every so often and a huge flow of processes accessing the disc simultaneously that literally "stick" the disc, and physically jolting my computer unsticks it. Again, this has been tested for hours in a professional service environment, and without network access on, things are fine. As soon as there's network access available, the disc access occasionally cranks up to 100% and sticks everything. I'm using Microsoft Security Essentials, but this also happened under Norton, then McAfee. Again, this happened again after a complete wipe, so the likelihood of malware causing it seems low. I don't visit unsecure sites anyway, as far as I know. This, to me, narrows it down to a Windows 7 process that is somehow repeatedly corrupted, perhaps a corrupt .dll or driver, causing a conflict at the operating system level and temporary hard drive failure. I would encourage anyone who knows more about this stuff (which is probably most people!) to take a shot at this one, and I would encourage anyone else with a sticking hard drive in windows 7 64-bit to check on whether it occurs during safe mode without networking.

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  • Virtualization in Ubuntu 9.10

    - by Jeff Dege
    I have an existing Centos 5 installation. I would like to upgrade to Ubuntu. Thing is, I don't want to be down for as long as it will take to get my entire environment moved over - software installed, connectivity configured, etc. I'd like to take it one step at a time. But I don't really want to keep rebooting back and forth from the new OS to the old OS. That's what I did last time I upgraded to a new OS, and it got old real fast. So, since my new MB is virtualization-ready (AMD Phenom II 945 quad-core), I figured I could create a virtual machine, under the new OS installation, that ran the old OS installation. The problem is that the documentation I've been able to find has been pretty sparse. I've found a lot of possibilities, and little info on which would be capable of doing what I want. I have a new Ubuntu 9.10 installation, and a second disk containing the Centos 5 installation. And I don't know where to go next. Any help would be appreciated.

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  • Wake on LAN Problem

    - by Caley Woods
    I'm working to get wake on lan (wol) working so that we can do some power management at my workplace. I've enabled WOL on a test laptop running Win 7 x64 and put it to sleep and hibernate both with no luck. I'm using a 3rd party utility and I've ran wireshark on the test laptop with it booted up and I can see the WOL packets coming in and the machine refuses to wake from sleep or hibernate. I thought maybe it was the computer I was using so I had another Win 7 x64 laptop nearby and I tried it, same scenario. We're in a cisco environment and I believe I gotten all the pieces in place since I'm seeing the WOL packets come through. I've tested two machines on the same subnet to eliminate the possibility of a misconfiguration on the switch, this also has the same behavior. The laptop models are a Compaq 6510b and 6730b. Is there something I'm missing? I'm trying this across UDP port 50200 since that's the port the actual management system will use after I get it working.

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  • Weblogic WLST classpath

    - by lepricon28
    When I run the WLST script .sh script to set the env as follows why can't I see the updated path when I do echo? [linbox2 bin]$ ./setWLSEnv.sh CLASSPATH=/directory/ols_wls/patch_wlss1032/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/directory/ols_wls/patch_wls1032/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/directory/ols_wls/patch_oepe1032/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/directory/ols_wls/patch_ocm1031/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/directory/ols_wls/jrockit_160_14_R27.6.5-32/lib/tools.jar:/directory/ols_wls/utils/config/10.3/config-launch.jar:/directory/ols_wls/wlserver_10.3/server/lib/weblogic_sp.jar:/directory/ols_wls/wlserver_10.3/server/lib/weblogic.jar:/directory/ols_wls/modules/features/weblogic.server.modules_10.3.2.0.jar:/directory/ols_wls/wlserver_10.3/server/lib/webservices.jar:/directory/ols_wls/modules/org.apache.ant_1.7.0/lib/ant-all.jar:/directory/ols_wls/modules/net.sf.antcontrib_1.0.0.0_1-0b2/lib/ant-contrib.jar: PATH=/directory/ols_wls/wlserver_10.3/server/bin:/directory/ols_wls/modules/org.apache.ant_1.7.0/bin:/directory/ols_wls/jrockit_160_14_R27.6.5-32/jre/bin:/directory/ols_wls/jrockit_160_14_R27.6.5-32/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/java/j2sdk1.4.2_11/bin/bin:/home/oracle/bin:/directory/wls_olwcs/jdk160_14_R27.6.5-32/bin:/directory/ccanywhere81/bin:/directory/oracle/oracle/product/10.2.0/client_1/bin Your environment has been set. [linbox2 bin]$ export CLASSPATH [linbox2 bin]$ export PATH [linbox2 bin]$ echo $PATH /usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/java/j2sdk1.4.2_11/bin/bin:/home/oracle/bin:/directory/wls_olwcs/jdk160_14_R27.6.5-32/bin:/directory/ccanywhere81/bin:/directory/oracle/oracle/product/10.2.0/client_1/bin [linbox2 bin]$

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  • sudo fdisk in a live session does not show all hard drives

    - by cornbread
    I am having Grub2 issues in my Ubuntu 10.04 dual boot, 2 hard drive system. So I am attempting to follow the standard grub2 reinstallation guide (cant post link because of spam filters allowing only one... ?_?) Don't know if this is the root of my problem, but my speedy internal HD with my OS on it is not showing up anywhere in a live session. Not in nautilus, behind fdisk.... no where. When I can get the main system to boot, there is no issue seeing all available partitions. But the live session sees only the 1TB internal media/backup hard drive. I need access to the other hard drive and it's partitions to finish the grub2 re-installation but I am not sure anymore that is the underlying issue. Anyone have experience with this? The issue I have identified as a grub2 issue is fully described here. SandPvvr describes it exactly. Some notes: I do not see the grub2 menu for my os's holding down the shift key after my bios screen works maybe 10% of the time Not related to reinstalling a windows os. havent been touched in a year do some web development. issue may have started when I was playing with ruby and django. not sure on this. Could a dev environment do this? fdisk in live session ubuntu@ubuntu:~$ sudo fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0001d518 Device Boot Start End Blocks Id System /dev/sdb2 1 121601 976759939 5 Extended /dev/sdb5 487 110765 885816036 83 Linux /dev/sdb6 110766 121601 87040138+ b W95 FAT32 /dev/sdb7 1 486 3903700+ 82 Linux swap / Solaris Partition table entries are not in disk order

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  • How to effectively have less php-cgi processes running?

    - by João Pinto Jerónimo
    My server is a Linode 512, and on it I run a Wordpress MU with 3 websites (they don't get a lot of visitors) and a couple of NodeJS apps. I need to switch to Lighttpd because Apache 2 was using about 59% of the server's RAM, and now I have the php-cgi processes taking up about 43.6% of the server's RAM: most often 2 processes use 16.5% of the RAM each, 4 processes use 1.8% of the RAM each, and 4 more processes use 0,8% of the RAM, each How can I have less of these processes ? I'm almost sure they're not all needed for the trafic this server gets... I tried only allowing 2 children, but I still have those 10... This is my fastcgi.server section in lighttpd.conf. fastcgi.server = ( ".php" => ( "localhost" => ( "socket" => "/var/run/lighttpd/php-fastcgi.socket", "bin-path" => "/usr/bin/php-cgi", "bin-environment" => ( "PHP_FCGI_CHILDREN" => "2", "PHP_FCGI_MAX_REQUESTS" => "4000" ) ) ) ) What else can I do to tune lighttpd to use less RAM ?

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  • What to look for in a switch with LAN/WAN verses an iSCSI SAN?

    - by Luke
    I'm setting up a VMWare ESXi 5 environment with 3 server nodes. Dell recommended 2x Force10 S60 switches shared (iSCSI SAN, LAN/WAN). The S60 switches are extremely powerful. They have 1.25 GB of buffer cache, < 9us latency. But they are very expensive (online price ~$15k per switch, actual quote a little less). I've been told that "by the book" you should at least have 2 internal switches for SAN, and 2 switches for LAN/WAN (each with a redundant). I know some of the pros and cons of each approach. What I'm wondering is, would it be more cost effective to disjoin the SAN from LAN with less expensive switches? The answer to this question highlights what I should be looking for in a switch for the SAN. What should I be looking for in a LAN/WAN switch, in comparison to the SAN? With the above linked question for the SAN: How is buffer latency measured? When you see 36 MB of buffer cache, is that shared or per port? So 36 MB would be 768kb or 36MB per port? With 3 to 6 servers how much buffer cache do you really need? What else should I be looking at? Our application will be heavily using HTML5 websockets (high number of persistent connections). The amount of data being sent is small; Data sent between client <- server isn't broadcasted (not a chat/IM service). We will be doing some database reporting too (csv export, sums, some joins). We are a small business and on a budget. We'd probably only be able to spend no more than $20k on switches total (2 or 4).

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  • Can I use iptables on my Varnish server to forward HTTPS traffic to a specific server?

    - by Dylan Beattie
    We use Varnish as our front-end web cache and load balancer, so we have a Linux server in our development environment, running Varnish with some basic caching and load-balancing rules across a pair of Windows 2008 IIS web servers. We have a wildcard DNS rule that points *.development at this Varnish box, so we can browse http://www.mysite.com.development, http://www.othersite.com.development, etc. The problem is that since Varnish can't handle HTTPS traffic, we can't access https://www.mysite.com.development/ For dev/testing, we don't need any acceleration or load-balancing - all I need is to tell this box to act as a dumb proxy and forward any incoming requests on port 443 to a specific IIS server. I suspect iptables may offer a solution but it's been a long while since I wrote an iptables rule. Some initial hacking has got me as far as iptables -F iptables -A INPUT -p tcp -m tcp --sport 443 -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 443 -j ACCEPT iptables -t nat -A PREROUTING -p tcp --dport 443 -j DNAT --to 10.0.0.241:443 iptables -t nat -A POSTROUTING -p tcp -d 10.0.0.241 --dport 443 -j MASQUERADE iptables -A INPUT -j LOG --log-level 4 --log-prefix 'PreRouting ' iptables -A OUTPUT -j LOG --log-level 4 --log-prefix 'PostRouting ' iptables-save > /etc/iptables.rules (where 10.0.0.241 is the IIS box hosting the HTTPS website), but this doesn't appear to be working. To clarify - I realize there's security implications about HTTPS proxying/caching - all I'm looking for is completely transparent IP traffic forwarding. I don't need to decrypt, cache or inspect any of the packets; I just want anything on port 443 to flow through the Linux box to the IIS box behind it as though the Linux box wasn't even there. Any help gratefully received... EDIT: Included full iptables config script.

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  • How to configure traffic from a specific IP hardcoded to an IP to forward to another IP:PORT using i

    - by cclark
    Unfortunately we have a client who has hardcoded a device to point at a specific IP and port. We'd like to redirect traffic from their IP to our load balancer which will send the HTTP POSTs to a pool of servers able to handle that request. I would like existing traffic from all other IPs to be unaffected. I believe iptables is the best way to accomplish this and I think this command should work: /sbin/iptables -t nat -A PREROUTING -s $CUSTIP -j DNAT -p tcp --dport 8080 -d $CURR_SERVER_IP --to-destination $NEW_SERVER_IP:8080 Unfortunately it isn't working as expected. I'm not sure if I need to add another rule, potentially in the POSTROUTING chain? Below I've substituted the variables above with real IPs and tried to replicate the layout in my test environment in incremental steps. $CURR_SERVER_IP = 192.168.2.11 $NEW_SERVER_IP = 192.168.2.12 $CUST_IP = 192.168.0.50 Port forward on the same IP /sbin/iptables -t nat -A PREROUTING -p tcp -d 192.168.2.11 --dport 16000 -j DNAT --to-destination 192.168.2.11:8080 Works exactly as expected. IP and port forward to a different machine /sbin/iptables -t nat -A PREROUTING -p tcp -d 192.168.2.11 --dport 16000 -j DNAT --to-destination 192.168.2.12:8080 Connections seem to timeout. Restrict IP and port forward to only be applied to requests from a specific IP /sbin/iptables -t nat -A PREROUTING -p tcp -s 192.168.0.50 -d 192.168.2.11 --dport 16000 -j DNAT --to-destination 192.168.2.12:8080 Times out as well. Probably for the same reason as the previous entry. Does anyone have any insights or suggestions? thanks,

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  • Block users from Social networking websites while firewall is down

    - by SuperFurryToad
    We currently have a SonicWall firewall, which does a pretty good job a blocking Social networking websites like Facebook and Bebo. The problem we are having is that sometimes we need to temporarily disable our firewall blocklist so we can update our company's page on Facebook for example. Whenever we do this, have see an avalanche of users logging on to their Facebook pages during work time. So what we need a way to block access while the firewall is down. For the sake of argument, we have two groups of users - "management" and "standard users". "standard users" would have no access to Facebook, but "management" users would have access. Perhaps something like a host file redirect for non-management users. This could probably be enforced via group policy that would call a bat file to copy down the host file, depending if the user was management or not. I'm keen to hear any suggestions for what the best practice would be for this in a Windows/AD environment. Yes, I know what we're doing here is trying to solve a HR problem using IT. But this is the way management wants it and we have a lot of semi-autonomous branch offices that we don't have a lot of day to day contact with, so an automated way of enforcing this would be the most preferable method.

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  • Process PHP files from a network share in a vmware virtual machine

    - by nhinkle
    As a testing environment, I have set up a vmware virtual machine running Windows Server 2008 R2. I have Apache and PHP installed (as part of the xampp package). I am doing the development outside of the VM, and so want Apache to serve PHP files from a VM shared folder (which appears as a network share in the VM). I have done this by creating an NTFS symbolic link in Apache's htdocs directory. I can access this directory from the browser, and plain-text files are readable. However, PHP fails to process files, instead returning the following error: Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0 Fatal error: Unknown: Failed opening required 'C:/xampplite/htdocs/path/to/file.php' (include_path='.;C:\xampplite\php\PEAR') in Unknown on line 0 It appears to be a permissions issue — PHP doesn't seem to be allowed to read the file to process it. However, Apache has no problem opening files in the directory. I cannot figure out how to give PHP the necessary permissions to process the file. Does anybody know of a way to make this work, or else another solution for getting the files into the VM automatically while I develop on the host machine?

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  • IPv6 Addresses causing Exchange Relay whitelists to fail

    - by makerofthings7
    Several of our new Exchange servers are failing to relay messages because it is communicating over IPv6 and not matching any receive connector I previously set up. I'm not sure how we are using IP6 since we only have a IPv4 network and we are routing across subnets. I discovered this by typing helo in from the source to the server that is confused by my IP6 address. I saw the IPv6 message and the custom message I gave this receive connector. (connectors with more permission have a different helo) 220 HUB01 client helo asdf 250 HUB01.nfp.com Hello [fe80::cd8:6087:7b1e:99d4%11] More info about my environment: I have two dedicated Exchange forests each with a distinct purpose. They have no trust and only communicate by SMTP. They both share the same DNS infrastructure via stub zones. What are my options? This is my guess, but I'm no IPv6 expert so I don't know which one is the best option Disable IPv6 Add the IPv6 address to the whitelist (isn't that IP dynamic?) Tell Exchange to use IPv4 instead Figure out why we are using IPv6 instead of IP4

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  • Redeploy using Active Directory

    - by Noam Gal
    I am trying to use group policy to deploy our msi through AD. For some strange reason, when I overwrite the msi with a newer version, and then go to the policy, and click on "Redeploy Application", the application gets uninstalled on the users' machines, and all reg keys, binaries and shortcuts are gone from them. The "Add/Remove Programs" still contain the application entry. I have managed to create a minimal vdproj that does nothing but write its current Product Version to a registry key, and created two versions of it (1.0.0 and 1.1.0). I still face the same problems when using this msi in my AD environment. I did check that my Package Codes and Product Codes are different for both versions, and that the Upgrade Codes are identical. I also checked the RemovePreviousVersion to true. Checking with some other msi (firefox 3.0.0 and 3.6.3) I downloaded from a site specifically for AD deploy, it worked just as expected (first installing the 3.0.0, then I over-written the msi, and clicked on "Redeploy", and the users got 3.6.3 after the next log-off-log-on). What am I missing here?

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  • LAMP Setup, PHP's session_start permission denied

    - by Andrew
    I'm trying to set up a development environment for a legacy system that runs CentOS 4.8, PHP 4.3.9, and MySQL 4.1.22. I'm matching OS and software versions to keep the development server as close to the production server as possible. When I fire up PHPMyAdmin's setup script (version 2.11.10.1, of course) the installation errors out and I see these errors in my error log: [client 172.18.141.74] PHP Warning: session_start(): open(/var/lib/php/session/sess_b5b90f86bd3dcfad315ff24cb7483a79, O_RDWR) failed: Permission denied (13) in /home/www/intranet/phpmyadmin/libraries/session.inc.php on line 87 [client 172.18.141.74] PHP Warning: Unknown(): open(/var/lib/php/session/sess_b5b90f86bd3dcfad315ff24cb7483a79, O_RDWR) failed: Permission denied (13) in Unknown on line 0 [client 172.18.141.74] PHP Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/session) in Unknown on line 0 I've done some searching on ServerFault and on teh Googles and I see that a common reason for this error is that the session.save_path isn't writable by the www user. I also found where in /etc/php.ini this URL is set: session.save_path. My session.save_path is set to: session.save_path = /var/lib/php/session I've since changed the owner and the group of /var/lib/php/session and still have the same error. Here's the result of ls -la for /var/lib/php [root@localhost php]# ls -la total 24 drwxrwxr-x 3 www www 4096 Oct 23 20:21 . drwxr-xr-x 17 root root 4096 Oct 23 20:31 .. drwxrwx--- 2 www www 4096 Jun 1 2009 session ...But I'm still getting the same error. Is there another possibility for why I'm getting this error?

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