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Apache proxy is modifying the HTTP status code

- by jarnbjo

I am using Apache as a proxy frontend for a Java web application, which is deployed on WebSphere. The web application is using custom status codes (55x) to signal specific errors to the clients. When accessing the web application directly through the WebSphere HTTP listener, everything works as expected, but when these requests are proxied through an Apache load balancer, the status codes are modified by Apache and replaced with a generic 500 error code (internal server error). In Apache's access.log, the correct status code is logged: <IP> - - [11/Nov/2011:17:24:53 +0100] "POST <URL> HTTP/1.1" 551 36 But the actual response received by the client starts like this (logged with tcpdump): HTTP/1.1 500 Internal Server Error ... Followed by the real status code in the response content: ... Error 551: Berichteter Fehler: 551 ... Is there an obvious reason for this behaviour or does someone have a suggestion on how to modify the Apache configuration to forward the "real" status code instead of 500?

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application monitoring tools

- by Shachar

we're an ISV about to deploy our SaaS application over the internet to our end users, and are currently looking for an application monitoring solution. In addition to monitoring the usual OS-level suspects (I/O, disk space, logs, CPU, RAM, swapping, etc.), we're also looking to monitor, alert and report on internal application events, conditions, and counters (think queue size for internal service, or latency of a service we're getting from a third party via custom APIs). We're started looking at Nagios, Zenoss, etc., but found out those do only low-level stuff, and are currently looking at MOM and ManageEngine. Still, they are far from being an custom app monitoring tool. So - do you have anything to suggest?

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libvirt + ESX (HTTP response code 400 for call to 'Login')

- by Coops

I'm trying to connect to a vSphere cluster using the information from the libvirt documentation. $ virsh -c "vpx://[email protected]/dc1/dc1-cluster-e01/dc1-vsphere-e04/?no_verify=1" Enter root's password for 10.51.4.11: error: internal error HTTP response code 400 for call to 'Login' error: failed to connect to the hypervisor I seem to be able to establish a connection, but it fails with a "HTTP code 400". If I provide the incorrect password it fails with a 'login credentials' error, so it looks like I am getting a connection, but it's failing for another reason. Wireshark is no help as it's all done over SSL/TLS. Any thoughts folks? UPDATE: 15:21 28/02/11 FYI - I'm running libvirt-0.8.3 (the Ubuntu package recompiled with the ESX flag enabled). When I put virsh into debug mode it returns this: [snip] Enter root's password for 10.51.4.11: 15:19:09.011: debug : do_open:1249 : driver 3 ESX returned ERROR 15:19:09.011: debug : virUnrefConnect:294 : unref connection 0x98aa8f8 1 15:19:09.011: debug : virReleaseConnect:249 : release connection 0x98aa8f8 error: internal error HTTP response code 400 for call to 'Login' error: failed to connect to the hypervisor

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New standalone ESXi 5 deployments - USB versus SD card?

- by ewwhite

Now that the old full VMWare ESX with service console is no longer, I'm redeploying some standalone ESXi servers. I'm using HP ProLiant ML and DL G6 and G7 servers. Does it make more sense to utilize the internal USB port for ESXi or the internal SD card slot? I'm using the HP ESXi 5 build, but am not sure what the recommended practice is. Any recommendations on cards/USB drives for this purpose? BTW - these will be all-in-one storage servers with the onboard disk storage presented via PCIe passthrough.

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Have to dhclient each restart to access internet

- by Zeophlite

So each time I restart my ubuntu server (virtual 10.04, via Xencenter), I have to call dhclient before I can access the internet: http://img813.imageshack.us/i/dhclient.png/ What do I need to change to get internet access automatically? Apologies for posting images, I'm using Xencenter, so I can't copy/paste the console output EDIT:: daniel@workwork:~$ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 192.168.69.136 netmask 255.255.255.0 network 192.168.69.0 broadcast 192.168.69.255 gateway 192.168.69.1 # dns-* options are implemented by the resolvconf package, if installed dns-nameservers 192.168.69.120 dns-search workwork.com.au daniel@workwork:~$ ifconfig eth0 Link encap:Ethernet HWaddr ae:11:14:22:0a:03 inet6 addr: fe80::ac11:14ff:fe22:a03/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:32 errors:0 dropped:0 overruns:0 frame:0 TX packets:85 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:10496 (10.4 KB) TX bytes:13086 (13.0 KB) Interrupt:32 Base address:0x6000 eth1 Link encap:Ethernet HWaddr b2:2c:40:f2:a0:fa inet addr:192.168.69.167 Bcast:192.168.69.255 Mask:255.255.255.0 inet6 addr: fe80::b02c:40ff:fef2:a0fa/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13448 errors:0 dropped:0 overruns:0 frame:0 TX packets:3100 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7679428 (7.6 MB) TX bytes:282286 (282.2 KB) Interrupt:36 Base address:0xa100 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:179 errors:0 dropped:0 overruns:0 frame:0 TX packets:179 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:36905 (36.9 KB) TX bytes:36905 (36.9 KB) daniel@workwork:/var/lib/dhcp3$ cat dhclient.leases lease { interface "eth1"; fixed-address 192.168.69.167; filename "boot\\x86\\wdsnbp.com"; option subnet-mask 255.255.255.0; option routers 192.168.69.1; option dhcp-lease-time 28800; option dhcp-message-type 5; option domain-name-servers 192.168.69.120,192.168.69.121; option dhcp-server-identifier 192.168.69.120; option dhcp-renewal-time 14400; option dhcp-rebinding-time 25200; option domain-name "workwork.com.au"; renew 5 2011/03/18 07:36:53; rebind 5 2011/03/18 11:35:39; expire 5 2011/03/18 12:35:39; } lease { interface "eth1"; fixed-address 192.168.69.167; filename "boot\\x86\\wdsnbp.com"; option subnet-mask 255.255.255.0; option routers 192.168.69.1; option dhcp-lease-time 28800; option dhcp-message-type 5; option domain-name-servers 192.168.69.120,192.168.69.121; option dhcp-server-identifier 192.168.69.120; option dhcp-renewal-time 14400; option dhcp-rebinding-time 25200; option domain-name "workwork.com.au"; renew 5 2011/03/18 08:51:58; rebind 5 2011/03/18 12:24:16; expire 5 2011/03/18 13:24:16; } daniel@workwork:/var/lib/dhcp3$ cat dhclient.eth0.leases daniel@workwork:/var/lib/dhcp3$ ifconfig eth1 before and after dhclient http://img692.imageshack.us/i/prepost.png/

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Port Forwarding a Specific Port (e.g. 22)

- by Jerry Blair

I'm still confused about establishing an SSH connection (port 22) between two computers on different internal networks. For example: I am on my computer with internal IP address IIP-1, connected to my router RT-1. There are 10 IIPs connected to RT-1. I want to establish an SSH connection to IIP-3 which is connected to router RT-2. There are 10 IIPs connected to RT-2. At any time, there can be multiple SSH connections between IIPs on RT-1 and RT-2. Since I only have port 22 available, I don't know which SSH session is talking between which IIPs. I looked at a couple of similar questions but am still unclear on the solution. Thanks much, Jerry

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XP Mode as a server, Win 7 as a client

- by Spyro

I have two virtual machines (XP Mode). They are connected to each other by a network setting - Internal Network. It is the only working setting. This is the only way I got two virtual XP to ping each other. Now I want to connect each of them from the application that runs on Windows 7 which is hosting both virtual machines, but I can't do that. The firewall on both XP-Mode machines is disabled. Any other networking setting added as additional adapter on Xp-Mode machine does not allow me to connect from Windows 7. So my question is this - how to enable connection from Windows 7 application to XP mode application (client - server)? Point 2 (pass message) work perfectly because of the "internal network" setting. The problem is point 1 and 3.

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Mounting to external NFS from a KVM VM.

- by jbfink

I've got a machine acting as a KVM host and another machine that NFS exports to that KVM host. I'd like for one of the internal VMs on the KVM host to be able to mount the NFS share. I can export to the KVM host IP fine and do a mount, but it doesn't work for the internal VM; I just get a failed error with "reason given by server: Permission denied". I've already tried to re-export the NFS from host to VM, but apparently doing two levels of NFS is not a Good Idea. Anyone know how I might get this working?

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Apache Reverse Proxy server and SSL NTLM SharePoint

- by user50211

Hi, I'm trying to set Apache as proxy server to an internal SharePoint server. I have previously configured Apache to run as a proxy server to export internal webpages and web applications. However, the Sharepoint is using SSL and NTLM authentication, and this is new to me :( I have tried many options, the traffic seems to be forwared as I get the authentication popup window, but when I insert the user/pass, I get back to the same popup window. Anybody has configured Apache to do so? Here is a part of my httpd.conf: <VirtualHost *:443> ServerName repository.out.com SSLProxyEngine On RequestHeader set Front-End-Https "On" ProxyRequests Off ProxyPreserveHost On ProxyPass / https://sharepoint.in.com ProxyPassReverse / https://sharepoint.in.com CacheDisable * SetEnv force-proxy-request-1.0 1 SetEnv proxy-nokeepalive 1 ErrorLog logs/jlanza_log CustomLog logs/jlanza_log common </VirtualHost>

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Database/Web Server and SQL Server Setup - Security?

- by Jess

This seems really basic, but I couldn't find an answer already ... we are looking to deploy a website to an IIS server, and a database to a separate server. We aren't sure how to best secure this for access by internal users and internet. The IIS Server is not connected to the domain, and neither is the database at the moment. Should it be? Also, if we use SQL Server authentication instead of Windows Authentication, should we just hard-code the user/password into our internal apps?

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MSDeploy - possible to call setAcl on multiple destinations in one go?

- by growse

I'm building a nice little continuous integration environment for our development team, based on TeamCity. It's working rather nicely, as it can build a mix of .NET and PHP projects, and push them to our internal and external platforms. I'm primarily using MsDeploy to push everything to the internal platform, as that's all IIS based. However, there's a number of builds where I need to set directory permissions on the destination directory. I can use the setAcl operator just fine, but that only seems to take a single destination as an argument. Therefore, if I need to alter the permissions on 5 destination directories, I need to call MsDeploy 5 times, which seems a lot of overhead. Is there a sensible way around this? Reading the documentation, I don't think MsDeploy takes more than a single argument for the setAcl operator, but could be wrong. Is there a better way for a build server to set multiple directory permissions in one go?

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How to tell Windows 7 to ignore a default gateway

- by zildjohn01

I currently have 2 network cards in my PC -- one connected to an internal network on a router with a disconnected WAN port (10.x.x.x), and one connected to the internet through a consumer router (192.168.0.x). Windows seems to recognize them correctly (my "Network and Sharing Center" lists them as "No Internet" and "Internet" respectively), however when I try browsing the internet it always tries the internal network's default gateway, rather than the one with internet access. Trying to ping a website results in "Reply from 10.0.0.1: Destination net unreachable.". A simple "route delete 0.0.0.0 mask 0.0.0.0 10.0.0.1" fixes the problems, but they return upon reboot, or upon renewing my IP. Is there any way to tell Windows to ignore one NIC's default gateway, or to at least give them priorities?

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Blocking IP Range in .htaccess Problem

- by Pedro

Hi, I'm trying to block the access of one of my webapps using IP Filter in the .htaccess, the problem is that after updating the file with: order allow,deny deny from 58.14.0.0/15 allow from all I get the folowing error: Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, [email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. What is wrong? Regards, Pedro

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Oracle RAC interconnect in a Dell M1000e Blade Enclosure

- by Antitribu

We are looking at a Dell M1000e enclosure and appropriate Blades with 4 NICs each. We are planning on running Linux/Oracle 11g RAC on two blades, storage will be handled on an iSCSI SAN for which two NICs (via passthrough) will be connected leaving us with two NICs (via blade centre switches). We would like to have an interconnect (obviously) , an external IP and an internal IP. Would best practice be to: bond the remaining two interfaces and VLAN as appropriate to provide three virtual interfaces? run the interconnect on one interface and VLAN the external/internal interfaces? purchase a blade with more NICs as the above is a terrible idea? Another option? Please feel free to point out the blindingly obvious or to relevant documentation on support.oracle. I am specifically interested in supported configurations and best practices. Thanks!

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why is usb disk corrupted by Vista restore

- by Martin

I have a laptop with Vista Business on an 80GB disk. I have created a full backup and stored that on the original 80GB drive. On my new 320GB disk, I have created a partition with exactly the same number of bytes as the original 80GB disk. I swap the disks so that the 320GB is internal, and the 80GB is in a USB caddy. I boot from the NEO restore CD and everything looks fine: I select the dump on the USB drive, target is drive C:, start the restore. After a few seconds, the restore fails with "not enough disks in machine or disk not large enough" error (I did note the exact phrase). I then swap the 80GB disk back to the internal drive, but the thing is unbootable. Why has the restore process scrubbed the boot status of the USB drive ?

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Re-deploy only the reports on SCOM Management Packs

- by Gabriel Guimarães

I've migrated Reporting Services on a SCOM 2007 R2 install, and noticed that the reports have not being copied. I can create a new report, but the ones I've had because of the management packs are gone. I've tried re-applying the Management Packs however it doesn't re-deploy them and when I try to access for example: Monitoring - Microsoft Windows Print Server - Microsoft Windows Server 2000 and 2003 Print Services - State View - select any item and click Alerts on the right menu. I get the following error: Date: 12/24/2010 12:40:35 PM Application: System Center Operations Manager 2007 R2 Application Version: 6.1.7221.0 Severity: Error Message: Cannot initialize report. Microsoft.Reporting.WinForms.ReportServerException: The item '/Microsoft.SystemCenter.DataWarehouse.Report.Library/Microsoft.SystemCenter.DataWarehouse.Report.Alert' cannot be found. (rsItemNotFound) at Microsoft.Reporting.WinForms.ServerReport.GetExecutionInfo() at Microsoft.Reporting.WinForms.ServerReport.GetParameters() at Microsoft.EnterpriseManagement.Mom.Internal.UI.Reporting.Parameters.ReportParameterBlock.Initialize(ServerReport serverReport) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ReportForm.SetReportJob(Object sender, ConsoleJobEventArgs args) The report doesn't exist on the reporting services side. how do I re-deploy this reports? Thanks in advance.

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Apache SSL losing session over load balancer

- by SaltyNuts

I have two physical Apache servers behind a load balancer. The load balancer was supposed to be set up so that a user would always be sent to the same physical server after the first request, to preserve sessions. This worked fine for our web apps until we added SSL to the setup. Now the user can successfully login, see the home page, but clicking on any other internal links logs the user right out. I traced the issue to the fact that while initial authentication is performed by server 1, clicking on internal links leads to having the request sent to server 2. Server 2 does not share sessions with server 1, and the user is kicked out. How can I fix it? Do I need to share sessions between the two servers? If so, could you point me to a good guide for doing this? Thanks.

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PCI-DSS compliance for business with only swipe terminals [migrated]

- by rowatt

I support the IT infrastructure for a small retail business which is now required to undergo a PCI-DSS assessment. The payment service and terminal provider (Streamline) has asked that we use Trustwave to do the PCI-DSS certification. The problem I face is that if I answer all questions and follow Trustwave's requirements to the letter, we will have to invest significantly in networking equipment to segment LANs and /or do internal vulnerability scanning, while at the same time Streamline assures me that the terminals we have (Verifone VX670-B and MagIC3 X-8) are secure, don't store any credit card information and are PCI-DSS compliant so by implication we don't need to take any action to ensure their network security. I'm looking for any suggestions as to how we can most easily meet the networking requirements for PCI-DSS. Some background on our current network setup: single wired LAN, also with WiFi turned on (though if this creates any PCI-DSS complexities we can turn it off). single Netgear ADSL router. This is the only firewall we have in place, and the firewall is out the box configuration (i.e. no DMZ, SNMP etc). Passwords have been changed though :-) a few windows PCs and 2 windows based tills, none of which ever see any credit card information at all. two swipe terminals. Until a few months ago (before we were told we had to be PCI-DSS certified) these terminals did auth/capture over the phone. Streamline suggested we moved to their IP Broadband service, which instead uses an SSL encrypted channel over the internet to do auth/capture, so we now use that service. We don't do any ecommerce or receive payments over the internet. All transactions are either cardholder present, or MOTO with details given over phone and typed direct into terminal. We're based in the UK. As I currently understand it we have three options in order to get PCI-DSS certification. segment our network so the POS terminals are isolated from all PCs, and set up internal vulnerability scanning on that network. don't segment the network, and have to do more internal scanning and have more onerous management of PCs than I think we need (for example, though the tills are Windows based, they are fully managed so I have no control over software update policies, anti virus etc). All PCs have anti virus (MSE) and windows updates automatically applied, but we don't have any centralised go back to auth/capture over phone lines. I can't imagine we are the first merchant to be in this situation. I'm looking for any recommendations a simple, cost effective way to be PCI-DSS compliant - either by doing 1 or 2 above with (hopefully) simple and inexpensive equipment/software, or any other ways if there's a better way to do this. Or... should we just go back to the digital stone age and do auth/capture over the phone, which means we don't need to do anything on our network to be PCI-DSS certified?

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Import emails from Claws IMAP cache

- by calandoa

I am trying to import an IMAP account composed of many folders from Claws Mail internal cache. Claws is unfortunately unable to export all the folders by selecting the root account. When checking the internal Claws cache folder, each mail is a plain text file named as following: base_path/My Account/Folder ABC/1 base_path/My Account/Folder ABC/2 base_path/My Account/Folder ABC/3 base_path/My Account/Folder ABC/4 base_path/My Account/Folder DEF/1 base_path/My Account/Folder DEF/2 base_path/My Account/Folder DEF/3 base_path/My Account/Folder X/etc... I tried to import this structure with different mails reader like KMail and Balsa, but each import failed. I just would like all these mails easily accessible and readable. Which tool on Linux can I use to import such a structure?

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Troubleshooting Website problems within the local network

- by HaydnWVN

Have an external website which opens fine on some PC's, yet seems to time out (or symptoms of timing out, but never actually does) on others. Seems to only affect (some) of our newer HP Pro 3305 MT Workstations. All of which are running Win7 32bit SP1 with all updates. Older PC's (Win7 32bit SP1 & WinXP) are unaffected. Using Google Chrome & Firefox makes no difference. Opening the website in IE9 Compatibility Mode has exactly the same symptoms. All PC's are on the same local network (Workgroup) using the same DNS server & gateway (inhouse) on the same internet connection, on the same subnet. There is no proxy server, no content filtering, no load balancing etc etc. Only group policy in effect (locally) is for Update scheduling. Local firewalls are all the same (Kaspersky WP4) and our external facing firewall has no IP specific settings. I have no control over the external website, traceroute shows the same destination on all PC's. It is a fairly popular website in our industry (Horticulture) and i'm not aware of any other people (even other sites within our sister companies) with the same problem. Update: Used Fiddler2 to monitor the HTTP request, seems its not getting fulfilled for some reason?! Request sent: GET http://www.rhs.org.uk/ HTTP/1.1 Host: www.rhs.org.uk Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Encoding: gzip,deflate,sdch Accept-Language: en-GB,en-US;q=0.8,en;q=0.6 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 Log from Fiddler 2 of the request: This session is not yet complete. Press F5 to refresh when session is complete for updated statistics. Request Count: 1 Bytes Sent: 567 (headers:567; body:0) Bytes Received: 0 (headers:0; body:0) ACTUAL PERFORMANCE -------------- ClientConnected: 17:02:33.720 ClientBeginRequest: 17:02:39.118 GotRequestHeaders: 17:02:39.118 ClientDoneRequest: 17:02:39.118 Determine Gateway: 0ms DNS Lookup: 0ms TCP/IP Connect: 46ms HTTPS Handshake: 0ms ServerConnected: 17:02:39.165 FiddlerBeginRequest: 17:02:39.165 ServerGotRequest: 17:02:39.165 ServerBeginResponse: 00:00:00.000 GotResponseHeaders: 00:00:00.000 ServerDoneResponse: 00:00:00.000 ClientBeginResponse: 00:00:00.000 ClientDoneResponse: 00:00:00.000 RESPONSE BYTES (by Content-Type) -------------- ~headers~: 0 Log of a successful request from a working PC (done this morning, excuse the timestamps being different from above): Request Count: 1 Bytes Sent: 493 (headers:493; body:0) Bytes Received: 20,413 (headers:525; body:19,888) ACTUAL PERFORMANCE -------------- ClientConnected: 08:22:47.766 ClientBeginRequest: 08:22:47.766 GotRequestHeaders: 08:22:47.766 ClientDoneRequest: 08:22:47.766 Determine Gateway: 0ms DNS Lookup: 26ms TCP/IP Connect: 30ms HTTPS Handshake: 0ms ServerConnected: 08:22:47.828 FiddlerBeginRequest: 08:22:47.828 ServerGotRequest: 08:22:47.828 ServerBeginResponse: 08:22:48.905 GotResponseHeaders: 08:22:48.905 ServerDoneResponse: 08:22:48.905 ClientBeginResponse: 08:22:48.905 ClientDoneResponse: 08:22:48.905 Overall Elapsed: 00:00:01.1388020 RESPONSE BYTES (by Content-Type) -------------- text/html: 19,888 ~headers~: 525 So my question has evolved into: What is the difference between the 2 requests and how do I determine why 1 PC is not getting a reply to it's GET request?

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Nginx proxy to s3 bucket gets 400 Invalid Argument

- by elssar

I have a Django app in which I serve media files through an nginx proxy to s3. The relevant python code response = HttpResponse() response['X-Accel-Redirect'] = '/s3_redirect/%s' % filefield.url.replace('http://', '') response['Content-Disposition'] = 'attachment; filename=%s' % filefield.name return response The nginx block for the internal redirect is location ~* ^/s3_redirect/(.*) { internal; set $full_url http://$1; proxy_pass $full_url; And the request logged by s3 is. REST.GET.OBJECT <media file> "GET <media file>" 400 InvalidArgument 354 - 4 - "http://<referer>" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1" - I, for the life of me, can't figure out what's wrong. The url send to nginx by the app is valid, it works in the browser. And nginx is sending a request to s3.

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Clone Windows 7 to bootable USB disk

- by Geziefer

I saw some posts here having a similar topic, but I haven't quite found what I am looking for. All I need to do is transfer my Windows 7 (Professional, 64bit) which is installed on an internal disk on my Dell Latitude laptop to an external USB disk in order to have my original system available for booting while installing a new system on the internal disk, which is essential since I need a working project environment for work in case the new system takes some days until fully completed. I already tried a disk clone with Acronis and Clonezilla, but in the 1st case it didn't even booted the clone and in the 2nd case it booted, but stopped with a bluescreen (and rebooted too fast to be able to see any error code). So has someone done successfully what I am trying to do and can help me out here?

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How can I check whether a volume is mounted where it is supposed to be using Python?

- by Ben Hymers

I've got a backup script written in Python which creates the destination directory before copying the source directory to it. I've configured it to use /external-backup as the destination, which is where I mount an external hard drive. I just ran the script without the hard drive being turned on (or being mounted) and found that it was working as normal, albeit making a backup on the internal hard drive, which has nowhere near enough space to back itself up. My question is: how can I check whether the volume is mounted in the right place before writing to it? If I can detect that /external-backup isn't mounted, I can prevent writing to it. The bonus question is why was this allowed, when the OS knows that directory is supposed to live on another device, and what would happen to the data (on the internal hard drive) should I later mount that device (the external hard drive)? Clearly there can't be two copies on different devices at the same path! Thanks in advance!

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HP proliant dl360 g5 fails to reboot

- by user1039384

Some history of this also available here. As of my latest update on the forum linked above, now cold reboot as well as hard reset and following boot for my proliant dl360 g5 works as expected and successfully boot the system. However, soft-reboot results in internal health indicator turning RED on the front and long beeps every around 6seconds until I either cold reboot or press and hold the power button. A summary of system state when this happens: Internal Health led indicator: RED External Health led indicator: Green No led next to any component is red or amber No POST message neither on the video output nor on IML logs (verified both at the time issue occures and after cold reboot that boots the system successfully). Any thoughts please share. I hope we can knock this issue down together with your help!

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How to make a DHCP server on virtual machine serves other virtual machines(on different physical machines)?

- by Tony

I'm building a virtual cluster with VirtualBox and Opensuse. I have 10 physical machines and need several vms on each. The virtual machines are supposed to be in a "private" network, but still have internet access. I was asked to set up a virtual head node working as DHCP server. I installed DHCP server on the virtual head node and it seems works. On VirtualBox I set 2 network adapters to the head node, one bridged adapter and one internal network. One vm on the same physical machine has been set nic as internal network adapter. The vm can get IP address (so DHCP works) but can't access internet. What should I do? Specifically, what network adapter should I choose for head-node and work-nodes in VirtualBox? What in the virtual machines should I do?

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