rboarman's questions

I am running Apache 2.2.15 on Linux in AWS using ELBs.

My goal is to provide two functions:

1) Heartbeat page for my ELB to check to see if Apache is running (/healthcheck.html)

2) For all other requests, send to an ELB in the next tier via ProxyPass

I have placed a simple html file in /var/www/html named healthcheck.html.

Here's my config:

<VirtualHost *:80>
   <Directory "/var/www/html">
    allow from all
   </Directory>
    ProxyRequests Off
    ProxyPass / http://bigassawsdomainname.com:80/  
    ProxyPassReverse / http://bigassawsdomainname.com:80/ 
    ProxyPreserveHost On
</VirtualHost>

The proxy functionality seems to be working fine. However, hitting localhost/healthcheck.html returns a 404.

I am quite sure my config is not set up correctly. How should I configure this? I've experimented with location and directory with no luck.

Update:

Solution:

NameVirtualHost *:80

<VirtualHost *:80>
    ProxyRequests Off
    <LocationMatch "^(?!/healthcheck.html)">
     ProxyPassMatch http://bigassawsdomainname.com:80/  
    </LocationMatch>
    ProxyPassReverse / http://bigassawsdomainname.com:80/ 
    ProxyPreserveHost On
</VirtualHost>

<VirtualHost *:80>
    DocumentRoot /var/www/html
    <LocationMatch /healthcheck.html>
    RewriteEngine On
    RewriteRule ^/$ /healthcheck.html [L]
   </LocationMatch>
</VirtualHost>

I apologize ahead of time if this question is really basic. My background is in Windows and I am being asked to maintain a RedHat Linux server that is in bad shape and is in production use.

The issue is that the version of PHP is different when executed from a script in Apache vs. the command line.

For example:

From the command line:

From the web page (Apache):

From the a php script called by a web page:

The script is called by this php code and function:

$exec_result = sku_exec(CLIMPORT.FILE_NAV, '', $_POST['nav_skus']);

function sku_exec($file_path, $call, $args)
{
    $exe = $file_path.' ';
    if($call != '' && isset($call) && $call) $exe .= $call.' ';
    $exe .= $args;
//  echo $exe.'<hr />';
    exec('php '.$exe, $return_data);
    return $return_data;
}

I need to downgrade the script to use 5.2.9 instead of 5.4.1.

Where do I even start to look for how this is configured? Why would the version of PHP that Apache is using be different from the version that it is calling from a script?

I looked at Apache’s config file but did not see anything that jumped out at me.

Any suggestions?

Unfortunately, upgrading the server to the latest PHP is not an option at the moment. The plan is to build out a new server and migrate to it.

I have a self-signed ssl certificate that I am trying to use on my Windows 7 development IIS7 machine. The certificate is working; however I am still getting a mismatched address error in IE9.

This is purely for development and testing purposes.

I’ve been through numerous blogs and postings and have tried to create the certificate using many different techniques. I've tried using both my machine name and localhost for the certificate but I get the same error.

These are the two I have followed most closely:

http://blogs.technet.com/b/sbs/archive/2007/04/10/installing-a-self-signed-certificate-as-a-trusted-root-ca-in-windows-vista.aspx

http://www.robbagby.com/iis/self-signed-certificates-on-iis-7-the-easy-way-and-the-most-effective-way/

This is my certificate in the MMC console under Trusted Root Certificates Authorities:

The signature matches the one assigned in IIS:

And my site is bound to that certificate:

Why do I continue to get the error and how can I fix it? Are there any issues using sugdomains on localhost?? All of my sites are run under one IIS app but each one has its own subdomain (multi-tenant).

Why does this work to connect to my remote SQL Server database:

            var srvConn = new ServerConnection("sql01");
            srvConn.LoginSecure = false;  
            srvConn.Login = "unittests";
            srvConn.Password = "mypwd";
            srvConn.DatabaseName = "MediaFilesDb";

            var srv1 = new Server(srvConn);
            Console.WriteLine(srv1.Information.Version); 

And this does not work:

        var scsb = new SqlConnectionStringBuilder();
        scsb.DataSource = "sql01";
        scsb.InitialCatalog = "MediaFilesDb";
        scsb.IntegratedSecurity = false;
        scsb.UserID = "unittests";
        scsb.Password = "mypwd";

        var srv1 = new Server(scsb.ConnectionString);
        Console.WriteLine(srv1.Information.Version);

I get the infamous error 40:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

If I take the connection string that is being generated and paste it into another tool, such as CodeSmith, it works correctly and the connection is established.

Why does the second example fail?

Edit:

If I specify TCP/IP for the network library:

scsb.NetworkLibrary = "dbmssocn";

I get this error:

The value's length for key 'data source' exceeds it's limit of '128'.

This is my connection string:

Data Source=sql01;Initial Catalog=MediaFilesDb;Integrated Security=False;User ID=unittests;Password=****;Pooling=False;Network Library=dbmssocn;

Major screw-up here and I need to find out how much trouble I am in.

I have an AD machine that is running Server 2008 R2, hyperv, DHCP and DNS. On the hyperv machine, I have a backup AD instance running along with a handfull of other server 2008 instances.

Sysprep was run on the hyperv machine instead of one of the instances.

I am attempting to bring the machine back up so I can try a system restore.

When I boot the hyperv machine, I get an error that says “Windows could not complete the installation. To install windows on this computer , restart the installation” This message occurs in safe mode, AD restore mode and in last known configuration mode.

How can I get my OS to boot at this point? Do I need to reinstall 2008 R2 from scratch?

Major screw-up here and I need to find out how much trouble I am in.

I have an AD machine that is running Server 2008 R2, hyperv, DHCP and DNS. On the hyperv machine, I have a backup AD instance running along with a handfull of other server 2008 instances.

One of the instances is running Acronis backup which has a current (last night) backup of the hyperv machine.

Sysprep was run on the hyperv machine instead of one of the instances.

What did I lose and what are the basic steps to get back the environment?

The problem I am having is that it seems like any network traffic on a guest virtual machine locks out RDP access to all guest instances and to the host.

For example, if I initiate a file copy from my NAS to a guest via RDP, as soon as the file copy starts, my RDP session gets dropped. At this point, I can no longer RDP or ping any of the guests nor can I get into the host server.

When the file copy completes, access is immediately restored.

My configuration is:

• Windows Server 2008 R2
• Dell 2900, 18g RAM, Dual NICs, only one is hooked up though
• Guests instances are also Server 2008 R2 using the same NIC as the host
• Gigabit switch
• NAS is a Synology DX1511+

My first thought is that I should not be using one NIC for both the guests and the host. What is the recommended configuration?

My second thought is that I need to look at the NIC card for some sort of issue. I don't see anything in the event viewer.

Thank you in advance.

I have a hard drive that is giving a number of error 23s when I scan it. Will formatting remap the bad sectors and is it safe to use or should I throw it away?

The exact error is "The device, \Device\Harddisk1\DR1, has a bad block.." GetDataBack reports it as an error 23.

The drive is a WD Raptor.

Thank you,

Rick

For a variety of reasons out of my control, I am building a new domain controller to replace one that is no longer in service. My platform is Server 2008 R2 with several Windows 7 member computers.

Several computers are bound to the old domain which is no longer available so I cannot promote and demote like I would normally.

I have a new domain controller built using a different name and I have unbound one machine from the old domain and rebound it to the new domain.

My questions are:

1) What will happen to the newly bound computer in terms of security? What am I risking by doing this?

2) Will I be able to get access to the files in the users’ profile so I can copy them into their new profile?

3) Are there windows services that will no longer start up because the domain has changed?

4) Is there anything I should do prior to unbinding the machines from the old domain? For example, copy files out and strip the ACLs.

5) What issues should I look out for?

Thank you in advance.

Rick

I am in the process of building a small network with several servers. I am using Server 2008 R2 and have one server (adc01.m6.local = 10.18.1.1) running as the domain controller and DNS server.

The issue is that reverse lookups do not seem to be working.

Forward zone:

;
;  Zone:    m6.local
;  Server:  adc01.m6.local
;  Time:    Wed Jan 19 23:03:37 2011 UTC
;
@ [Aging:3594426] 600 A 10.18.1.1
         3600 NS    adc01.m6.local.
         3600 SOA   adc01.m6.local. hostmaster.m6.local. 23 900 600 86400 3600
_msdcs 3600 NS  adc01.m6.local.
_gc._tcp.Default-First-Site-Name._sites [Aging:3594426] 600 SRV 0 100 3268 adc01.m6.local.
adc01 3600 A    10.18.1.1
DomainDnsZones [Aging:3594426] 600 A    10.18.1.1
ForestDnsZones [Aging:3594426] 600 A    10.18.1.1

I added a new reverse zone like this:

;
;  Zone:    1.18.10.in-addr.arpa
;  Server:  adc01.m6.local
;  Time:    Wed Jan 19 23:05:30 2011 UTC
;
@ 3600 NS   adc01.m6.local.
         3600 SOA   adc01.m6.local. hostmaster.m6.local. 1 900 600 86400 3600

This is the error:

c:\nslookup 10.18.1.1
Server:  UnKnown
Address:  ::1

*** UnKnown can't find 10.18.1.1: Non-existent domain

What did I do wrong?

Rick