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• xen + debian network after upgrade squeeze to wheeze

  - by rush

  I've got a Debian + Xen server. After a system upgrade to the stable version the network doesn't come up after boot. Every time after reboot I need to bring it up manually. The network configuration was not changed during upgrade. Here is /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 11.22.33.44 netmask 255.255.255.0 gateway 11.22.33.1 nameserver 8.8.8.8 After boot ip r shows no route and eth0 has no ip address. Manually ip and route setup goes fine and network starts working. Messages from dmesg about network I've found (looks like nothing interesting) [ 3.894401] ACPI: Fan [FAN3] (off) [ 3.894444] ACPI: Fan [FAN4] (off) [ 4.178348] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c9 [ 4.178351] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 4.178392] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, PBA No: 0100FF-0FF [ 4.178413] e1000e 0000:02:00.0: Disabling ASPM L0s L1 [ 4.178432] xen: registering gsi 16 triggering 0 polarity 1 -- [ 4.223667] ata5: DUMMY [ 4.223668] ata6: DUMMY [ 4.289153] e1000e 0000:02:00.0: eth1: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c8 [ 4.289155] e1000e 0000:02:00.0: eth1: Intel(R) PRO/1000 Network Connection [ 4.289245] e1000e 0000:02:00.0: eth1: MAC: 3, PHY: 8, PBA No: 1000FF-0FF [ 4.506908] usb 1-1: new high-speed USB device number 2 using ehci_hcd [ 4.542920] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) -- [ 10.362999] EXT4-fs (dm-23): mounted filesystem with ordered data mode. Opts: (null) [ 10.419103] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null) [ 10.988255] ADDRCONF(NETDEV_UP): eth1: link is not ready [ 13.175533] Event-channel device installed. [ 13.287555] XENBUS: Unable to read cpu state -- [ 13.288670] XENBUS: Unable to read cpu state [ 13.965939] Bridge firewalling registered [ 14.134048] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 14.283862] ADDRCONF(NETDEV_UP): peth0: link is not ready [ 14.284543] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [ 17.800627] e1000e: peth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 17.801377] ADDRCONF(NETDEV_CHANGE): peth0: link becomes ready [ 18.307278] device peth0 entered promiscuous mode [ 24.538899] eth1: no IPv6 routers present [ 28.570902] peth0: no IPv6 routers present I've upgraded two servers and I've such behaviour on two of them. How to fix this and get network starts automatically on boot?

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• Apache Virtual Host with directory aliases

  - by brechtvhb

  I'm trying to set up a dynamic virtual host in apache with a directory alias pointing to a difirent path for every domain. Here's what I'm trying to achive. Say I have 2 domains: * www.domain1.com * www.domein2.com I want both to point to the same index.php file (C:/cms/index.php). Now the hard part ... I want directories or certain file types to point to a diffirent path for each domain. Example: * www.domain1.com/layout -> C:/store/www.domain1.com/layout * www.domain2.com/layout -> C:/store/www.domain2.com/layout * www.domain1.com/image.png -> C:/store/www.domain1.com/image.png * www.domain2.com/image.png -> C:/store/www.domain2.com/image.png However the admin directory should point to the same path again for all sites * www.domain1.com/admin -> C:/cms/admin * www.domain2.com/admin -> C:/cms/admin Is there a way to achieve this kind of behaviour in apache 2.2 without having to create a virtualhost entry for each new domain?

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• hyper-v cluster behavior when losing network connectivity

  - by ChristopheD

  Setup: (rather new) Hyper-V R2 cluster with 2 nodes (in failover configuration). Fysical host OS: Windows Server 2008. About eight VM's (mixed: Windows Server 2008 and Linux) Yesterday we had a power outage of about 15 minutes. Our blades are on UPS so the fysical host machines (Windows Server 2008) never went down. Our main switches are not on UPS (yet) and we saw the behaviour similar to the following (as distilled from the event logs). The nodes in the cluster lost means of communication (because the external switches went down). The cluster wants to bring down one (the first) of the nodes (to start failover?). The previous step impacts clustered storage where the virtual machine VHD's are located. All VM's got brutally terminated and were found in a failed state in the failover manager in the host OS'es. The Linux VM's were kernel panicking and looked like they had their disk ripped out. This whole setup is rather new to us, so we are still learning about this. The question: We are putting switches on UPS soon but were wondering if the above is expected behavior (seems rather fragile) or if there are obvious improvements configuration-wise to handle such scenario's ? I can upload an evtx file concerning what exactly was going on in case that's necessary.

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• How to connect AD Explorer from Sysinternals to Global Catalog

  - by Oliver

  I'm using the sysinternals AD Explorer quite frequently to search and inspect an Active Directory without any big problems. But now i'd like to connect not only to a single AD Server. Instead i like to inspect the global catalog. If i enter within the AD Explorer connect dialog only the dns name of the machine (e.g. dns.to.domain.controller) that is serving the global catalog i only receive the concrete domain for which it is responsible, but not the whole forest (that's normal behaviour and expected by me). If i'm going to add the default port number (3268) for the global catalog in the form dns.to.domain.controller:3268 AD Explorer will simply crash without any further message. The global catalog itself works as expected under the given name and port number, cause our apache server use exactly this address and port number to authenticate some users. So any hints or tips to access the global catalog out of AD Explorer? Or there are any other nice tools like AD Explorer out there that doesn't have any problems to access the global catalog?

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• virtualized windows 2003 domain with CentOS 5.3 and poor connectivity

  - by Chris Gow

  I have a test lab set up running a virtualized windows 2003 domain on a CentOS 5.3(xen) host and am experiencing connectivity problems with guests running on other hosts that are part of the same domain. Here's the setup: On Computer A I have CentOS 5.3 running as the host and have virtualized windows 2003 servers for a primary domain controller, a backup domain controller and an exchange server. The primary domain controller also acts as a WINS and dns server. The windows domain appears on a separate subnet from my company's corporate network. Connectivity to any of the virtualized guests on Computer A is fine (remote desktop, ping, what have you). I have another host computer (Computer B) that also has a virtualized Windows 2003 server guest that is part of the same domain. However, connectivity to that guest is flaky at best. I continuously get at least 60% packet loss when I try to ping the guest, and due to that flakiness I can not access any of the services that it runs (remote desktop, web). Now here's the interesting part. It seems to affect only machines running on a different computer than the domain controller that are in the same domain. On Computer B there is another Windows 2003 guest that is not part of the test domain and is on my corporate network. There's no connectivity issues with that guest machine. The problem does not seem to be specific to Computer B either. I created a test VM on my local computer within the test domain and it exhibits the same behaviour as the guest in Computer B. A couple of items to note: - Host OS on both Computer A and B are the same CentOS 5.3 64 bit - Guest OS is Windows 2003 64 bit and 32 bit (the guest on Computer B is 32 bit) - Guest OSes are all up to date (as of Monday) - Host OS on Computer A was upgraded from CentOS 5.2 to 5.3 Update: Sorry I did not follow up with the comments from below. Computer A and B have been moved to their own dedicated switch and the problem has gone away. I'm not sure what the underlying problem(s) were though

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• W2003StdR2 server: DNS dysfunctional!

  - by Tor

  I hate to have to do this, but i feel up that creek with no... well, some of you might know. At the moment my one and only DNS server refuses to do Forwarding. The story is as goes: This site had 2 servers, one W2003SBS and an W2003StdR2. The SBS degraded over a short periode of time, and to not go down with it i decided to move all data over to the other server. This was of course an AD integrated site. Move went ok, the Std server removed from the domain, and the SBS put to rest. For the time being we decided to run the Std as a server only, and no AD. We renamed the internal domain to xxx.local, and set the server up with DNS, DHCP and installed WINS (not activated). Forwarding of DNS is to our ISP through a Netgear Firewall. The same address setup used as before. So - DNS server started and all went ok, clients reconfigured and hooked up and then - after a day's time - internet name resolution stopped working on the server! Nothing had changed, been altered, modified, nothing! What i now get when doing NSLOOKUP is just a 2 sec timeout response! And i have checked and looked, but to no avail. Anybody seen this behaviour before? And yes - ALL servicepacks have been updated on the server. I would be much obliged if anyone in here could lend an ear... and give advice! Thanks.... from Tor in Norway Today is the 14th, and i still have no resolution to this nagging problem. Anybody else got any advice in the matter? Please?

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• Windows Server 2012 licensing issue preventing RDP connections?

  - by QF_Developer

  I am witnessing an unusual behaviour on 1 of 5 Windows Server 2012 R2 machines (clean install) that is preventing any remote connections from being established via RDP. I have run through the prerequisites for RDP here but I am finding that any remote connection attempt instantly stops the "Windows Protection Service". When I check the event logs I see the following entry. The Software Protection Service has stopped Event ID: 903 Source: Security-SPP From what I have read Security-SPP is tasked with enforcing activation and licensing, it appears that RDP requires this service to be in the running state. Is it possible that I have inadvertently activated this instance of Windows with a key that has already been associated to another instance (We have 5 keys as part of an MSDN subscription)? Would this be sufficient to block RDP access? When I look under System Properties (Windows Activation) it states that Windows is activated and there are no other obvious indicators that there's a licensing issue. EDIT 1: I ran a Powershell script to display the product keys for all servers in order to check for any duplication. For the problematic server I am getting the message The RPC server is unavailable.

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• VMWare Server modifying files related to paused VMs, is this expected?

  - by David Spillett

  While refreshing the backup of a VM used for testing, I experienced the following warning from tar: tar: /VMsR0/cli_noddyco_test/VM2K8_32_web.vmem: file changed as we read it The VMs in question were paused at the time. My first though was that I'd mixed up the machines and was trying to backup something that was still actively running. To be sure I unpaused and properly shut down the VM, and the vmem files that tar reported changing vanished as I would expect. Is it normal for VMWare Server to touch or alter files for paused VMs like this, or is there likely something amiss with our setup? If this is expected behaviour, is just touching the vmem file (and so altering the last modification date without actually changing content)? If it is normal for files relating to paused VMs to be updated I shall have to revise our backup procedures to make sure the VMs are fully shut down fully rather than just pausing them (this isn't a problem, but it seems strange and I'd prefer to understand what VMWare is doing and why instead of just dismissing it as "one of those things" and working around it). For further detail: the host in question is VMWare Server version 2.0.2 running on 64-bit Debian/Lenny, and that VM did not have a snapshots at the time. We have backed up paused VMs this way in the past with no such warnings from tar.

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• Excel hyperlinks can be attached to a range of cells -- what is the use case for this?

  - by John Machin

  In Excel 2003 and 2007 (and presumably 2010), it is possible to attach a hyperlink to a single cell; this is well known. Excel also allows you select a range for insertion. In that case, clicking on any cell in the range will jump to the target of the hyperlink. I can't find any web reference to this possibility. My question is: What is the use case for being able to do this? My only suggestion: The first worksheet is a menu for the remainder of the workbook. Each worksheet or topic has a hyperlink on the menu sheet. Each hyperlinks occupies a 3x3 range of cells to make it easier for users in a hurry to click on the correct link. A side question: Interestingly, Excel allows you to overlap ranges. Example: Link from A1:C3 to file1. Then link from B2:D4 to file2. The overlapped cells (B2:C3) now point to file2. Only A1, A2, A3, B1, and C1 now point to file1. No warning is given about the overlap. What is the rationale for this behaviour?

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• MySQL stopped asking for passwords

  - by BlaM

  I'm currently experiencing a weird problem with one of my MySQL database servers: It stopped asking for passwords when I try to access the database from local with the mysql command line tool. I need a valid admin username. I also still need a password for remote access (i.e. from another IP). And I need a password when I - for example - access the database from a PHP script. But when I try to access the database from local host/commandline it will let me straight in to the data with my administrative users. They (admin users) have passwords set - and as I mentioned - I still need to specify those when I try to access the data via PHP. Changing the password didn't help. Non-Administrative users need to specify their passwort, but that doesn't really help if they can get anywhere with "mysql -u root" (or another admin user account name). (System Debian Linux Lenny, MySQL 5.0.51a) Any ideas? Anything that explains this behaviour? I don't understand how this can happen.

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• Strange File-Server I/O Spikes - What Is Causing This?

  - by CruftRemover

  I am currently having a problem with a small Linux server that is providing file-sharing services to four Windows 7 32-bit clients. The server is an AMD PhenomX3 with two Western Digital 10EADS (1TB) drives, attached to a Gigabyte GA-MA770T-UD3 mainboard and running Ubuntu Server 10.04.1 LTS. The client machines are taking an extremely long time to access/transfer data on the file server. Applications often become non-responsive while trying to open files located remotely, or one program attempting to open a file but having to wait will prevent other software from accessing network resources at all. Other examples include one image taking 20 seconds or more to open, and in one instance a user waited 110 seconds for Microsoft Word 2007 to save a document. I had initially thought the problem was network-related, but this appears not to be the case. All cables and switches have been tested (one cable was replaced) for verification. This was additionally confirmed when closing down all client machines and rebooting the server resulted in the hard-drive light staying on solid during the startup process. For the first 15 minutes during boot, logon and after logging on (with no client machines attached), the system displayed a load average of 4 or higher. Symptoms included waiting several minutes for the logon prompt to appear, and then several minutes for the password prompt to appear after typing in a user name. After logon, it also took upwards of 45 seconds for the 'smartctl' man page to appear after the command 'man smartctl' was issued. After 15 minutes of this behaviour, the load average dropped to around 0.02 and the machine behaved normally. I have also considered that the problem is hard-drive-related, however diagnostic programs reveal no drive problems. Western Digital DLG, Spinrite and SMARTUDM show no abnormal characteristics - the drives are in perfect health as far as the hardware is concerned. I have thus far been completely unable to track down the cause of this problem, so any help is greatly appreciated. Requested Information: Output of 'free' hxxp://pastebin.com/mfsJS8HS (stupid spam filter) The command 'hdparm -d /dev/sda1' reports: HDIO_GET_DMA failed: Inappropriate ioctl for device (the BIOS is set to AHCI - I probably should have mentioned that).

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• Joomla performance problems on AWS

  - by Bobby Jack

  I'm running a site on AWS with the following setup: Single m1.small instance (web server) Single RDS m1.small db Joomla 1.5 Generally, the site is performant, but is fairly low-traffic - say around 50-100 visits / hour. However, at peak time, we see about double that traffic. During peak time, pretty much every day: CPU usage on the web server slowly climbs to 100% CPU usage on the RDS server climbs quite quickly to about 30%, from an average of about 15 Database connections shoot up to about 140, from a normal average of about 2 or 3 The site is then occasionally unreachable, certainly according to pingdom monitoring. Does anyone recognise this behaviour? Can you point me in the right direction to begin investigating? Of course, RDS makes it difficult to do things like slow query logging, so I've started by regularly dumping the mysql process list into a file to see if there's anything I can spot there, but it would be good to have something more concrete to investigate. UPDATE At least, can someone confirm that I'm definitely right in saying that the level of traffic implies the problem must be a specific type of query taking way longer than it should to execute? This would happen if a table gets locked, and many queries need to write to it, right? For this very reason, I've already changed the __session table type to InnoDB.

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• LVS / IPVS difference in ActiveConn since upgrading

  - by Hans

  I've recently migrated from an old version of LVS / ldirectord (Ultra Monkey) to a new Debian install with ldirectord. Now the amount of Active Connections is usually higher than the amount of Inactive Connections, it used to be the other way around. Basically on the old load balancer the connections looked something like: -> RemoteAddress:Port Forward Weight ActiveConn InActConn -> 10.84.32.21:0 Masq 1 12 252 -> 10.84.32.22:0 Masq 1 18 368 However since migrating it to the new load balancer it looks more like: -> RemoteAddress:Port Forward Weight ActiveConn InActConn -> 10.84.32.21:0 Masq 1 313 141 -> 10.84.32.22:0 Masq 1 276 183 Old load balancer: Debian 3.1 ipvsadm 1.24 ldirectord 1.2.3 New load balancer: Debian 6.0.5 ipvsadm 1.25 ldirectord 1.0.3 (I guess the versioning system changed) Is it because the old load balancer was running a kernel from 2005, and ldirectord from 2004, and things have simply changed in the past 7 - 8 years? Did I miss some sysctl settings that I should be enforcing for it to behave in the same way? Everything appears to be working fine but can anyone see an issue with this behaviour? Thanks in advance! Additional info: I'm using LVS in masquerading mode, the real servers have the load balancer as their gateway. The real servers are running Apache, which hasn't changed during the upgrade. The boxes themselves show roughly the same amount of Inactive Connections shown in ipvsadm.

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• Does having TRIM enabled affect other hard drives on a computer (and how do you know when Windows is using it)?

  - by Breakthrough

  I recently purchased a solid state drive (an OCZ Vertex 2 (80 GB)) to use as my primary operating system partition. I also have three other SATA hard drives of assorted sizes. I successfully installed Windows 7 Professional onto the SSD (works awesome, great response time and transfer rate), and used the other three HDDs for data storage. I was browsing through the Bible of OCZ SSDs, and noticed the following in Section 60-76 - Tweaks and TRIM: Q. How do I know if TRIM is enabled on my OCZ SSD? A. In Windows 7, go to start/run/cmd), type the following: fsutil.exe behaviour query DisableDeleteNotify It should respond back with: DisableDeleteNotify=0 if TRIM support is ready and active. If it's not, then type: fsutil.exe behavior set DisableDeleteNotify 0 After a bit of searching on Google, I found similar results elsewhere (set DisableDeleteNotify to 0, which makes sense since for TRIM to work, the solid-state drive needs to be notified when deletes occur (for the garbage collector) unlike a normal hard drive). When I run the query on fsutil, I get the following result: DisableDeleteNotify = 48 Following the instructions I found, I set this to 0 instead of 48. However, I am beginning to wonder. Is this all the proof I really need that the OS is using TRIM? Also, since this applies globally for the computer, is TRIM data being sent to the other hard drives connected to the computer? And if so, would this cause any degradation in disk performance?

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• Linux RAID: Replacing Failed Drive...permanantly

  - by user137519

  Okay, odd question here. I have a server with RAID 5. A drive failed, in a really physically in a really odd way. On the machine it boots and is seen by the BIOS but...no partition can be seen on the drive consistantly (in and out). 2 out of 3 drives working...I made new spare disk and added it, RAID 5 rebuilt clean. All appears well but...when I reboot it keeps trying to use the 2nd drive which doesn't give any partition data, so of course the RAID 5 gets 2 out of 3...again. The status of my drive is as follows: /dev/sda2:Good /dev/sdb2 (drive has physical problem so no partition data) bad, /dev/sdc2:good /dev/sdd2:good. Every time I reboot the mdadm system seems to keep trying to use /dev/sdb which has physical failure (although spins and is detected). /dev/sdd is the new drive I created. I added /dev/sdd to the raid and it rebuilds the raid but this action isn't memorized upon reboot so it keeps listing /dev/sda and /dev/sdc but doesn't use the perfectly good /dev/sdd until I re-add manually. I've tried removing the dead drive with the mdadm tool, but as it cannot see /dev/sdb paritions it will not fail or remove it (says partition doesn't exist). the /etc/mdadm.conf was automatically made on the original OS install which only lists: DEVICE partitions MAILADDR root ARRAY /dev/md2 super-minor=2 ARRAY /dev/md0 super-minor=0 ARRAY /dev/md1 super-minor=1 Basically just the raids to use on boot. I need to remove this semi-dead drive (/dev/sdb) but I'd prefer to know why this is happening before I do. any ideas or suggestions. I supposed I could attempt to clone/replace /dev/sdb (the partitions on drive show up, then disappear shortly after) but given the partition "chester cat" behaviour this seems risky to me and as I have a working "spare" it seems unnecessary. Thanks in advance for your insight.

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• Copying files to my laptop makes them locked

  - by John

  When I save files from e.g. remote desktop or from an email (outlook) attachments, or from skype even to my local machine they show a locked Icon on the file. Then e.g. SQL Server doesn't let me restore backups as it says the operating system doesn't have access to the file. I've had success fixing this by setting the ownership of the parent folder to my user and then let it apply to sub folders. Also sometimes I need to click - Proerties - Security - Advanced - Change Permmissions, then check "change child permissions..." and apply on the parent dir. I'm using Windows 7 64 bit Proffessional, on HP Probook 4530, and I have a administrator user. This is a real pain to do everytime. I suspect it might be because of HP software that came with the laptop, I think there is drive encryption as part of the protect tools. Although I'm hoping there's something in windows i can set to change the behaviour to not lock these files.

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• How to setup apache to catch a proxy_pass from nginx?

  - by Paté

  I have a working apache vhost such as <VirtualHost localhost:10006> DocumentRoot "/home/pate/***/git/kohana_site/public/site/" </VirtualHost> <VirtualHost *:10006> ServerName api.* DocumentRoot "/home/pate/***/git/kohana_site/public/api/" LogLevel debug </VirtualHost> If i point to localhost:10006 I get my website and api.localhost:10006 I get my api. Then I have haproxy setup on top of that, that runs on port 10010 and both localhost:10010 and api.localhost:10010 have the expected behaviour. Now I have nginx setup on port 80 with this configuration. server { listen 10000; server_name api.*; location / { proxy_pass http://legacy_server; } } server { listen 10000 default; server_name _; location /nginx_status { stub_status on; access_log off; } # images are accessed via the CDN over HTTP (not https) location /n/image { proxy_pass http://image_caching_server; } location / { return 301 https://$host:10014$request_uri; } } upstream legacy_server { server localhost:10010 fail_timeout=0; } the problem is that apache does not recognize the vhost properly and redirects api.localhost to the website instead of the api. I tried playing with set_proxy_header Host $host but it doesn't seem to do anything.

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• Manual Http error response code in non-existent folder via routing

  - by Slytherin

  Apache server running on ubuntu-like linux I am getting unexpected behaviour when i try to manually send error response. If my .htaccess is responsible for the error response , then appropriate error document is loaded and displayed , with according response code in browser console. However , if my router is origin of the response code , then i get blank screen , but correct response code. .htaccess looks like this RewriteEngine On # RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule !\.(css|js|icon|zip|rar|png|jpg|gif|pdf)$ index.php [L] ErrorDocument 404 /err/404.html ErrorDocument 403 /err/403.html ErrorDocument 500 /err/500.html part of my router that sends the response is the following header("HTTP/1.1 403 Forbidden"); trying this format didnt help either header("HTTP/1.1 403 Forbidden", TRUE, 403); I also tried HTTP/1.0. Furthermore i was thinking that maybe relative path to error page might be an issue , but discarded this idea after attempting to access a document that is forbidden via .htaccess EDIT I should also point out , this scenario happens when URL for not-existing article is requested. Is it possible that Server is looking for a .htaccess file in a folder based on URL ? Eg: domain/blog/non-existent , is server looking for blog folder ? I am specifically asking this because there is no blog folder

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• Is it possible to get ESC to behave as an actual escape key?

  - by leftaroundabout

  So I have finally switched, not so much because I'm yet convinced Emacs in itself is the better editor but because it certainly does have more powerful extensions. I am still using vim-mode though, perhaps that's part of my problem... but I really don't intend to abandon the modes-approach, so I'll probably stay with it. I'm getting along quite well, but one thing I find really unnerving is the behaviour of the esc key (which I have in the shift-lock position). I'm used to relying on this a lot as more or less a "panic key", which may not be nice but I find allows me to work generally quite a bit less caring about the keystrokes themselves, and thus faster. What I'd like this key to do is just get me out of any minibuffer or special editing mode into a well-defined normal state. Perhaps most importantly, I would like it to not do anything unrelated, Simulate meta. What do I have an alt key for? Close windows I'm not even in at the time. Getting interpreted as the final key in some key sequence. ... Is it possible to turn all that off and make esc an actual escape key? Vim-mode does make it behave kind of as I like in some situations, but when other plugins are involves this often breaks. Alternatively, are there different options that might suit my kind of workflow?

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• SSH hangs when executing command remotely

  - by Serty Oan

  Client : OpenSSH_5.1p1 Debian-5ubuntu1 (Ubuntu 9.04) Server : OpenSSH_5.1p1 Debian-5 (Proxmox 2.6.24-7-pve) I use SSH to execute commands remotely on the server (module check_by_ssh of Nagios). But SSH hangs from time to time when trying to execute commands. I can log to the server via SSH but not executing a simple 'ls'. And it seems to block from all clients from the same IP address. Authentication is not the problem, may it be made by SSH keys or password. ssh -l root -p 2222 server.domain.tld 'ls' Here the client debug info debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug1: Sending environment. debug3: Ignored env ORBIT_SOCKETDIR *** skipping approx 40 env var ignored debug1: Sending command: ls debug2: channel 0: request exec confirm 1 It hangs there. Then after a random time, it works again (without doing anything). Killing all sshd process on the server seems to work too. It works from a Putty. I saw that some people had trouble like this due to ISP reverse DNS problem, but it does not seem to be the case here. It can work for hours and then not work for half an hour or so. What could explain this behaviour ?

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• MSMQ on Win2008 R2 won't receive messages from older clients

  - by Graffen

  I'm battling a really weird problem here. I have a Windows 2008 R2 server with Message Queueing installed. On another machine, running Windows 2003 is a service that is set up to send messages to a public queue on the 2008 server. However, messages never show up on the server. I've written a small console app that just sends a "Hello World" message to a test queue on the 2008 machine. Running this app on XP or 2003 results in absolutely nothing. However, when I try running the app on my Windows 7 machine, a message is delivered just fine. I've been through all sorts of security settings, disabled firewalls on all machines etc. The event log shows nothing of interest, and no exceptions are being thrown on the clients. Running a packet sniffer (WireShark) on the server reveals only a little. When trying to send a message from XP or 2003 I only see an ICMP error "Port Unreachable" on port 3527 (which I gather is an MQPing packet?). After that, silence. Wireshark shows a nice little stream of packets when I try from my Win7 client (as expected - messages get delivered just fine from Win7). I've enabled MSMQ End2End logging on the server, but only entries from the messages sent from my Win7 machine are appearing in the log. So somehow it seems that messages are being dropped silently somewhere along the route from XP or 2003 to my 2008 server. Does anyone have any clues as to what might be causing this mysterious behaviour? -- Jesper

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• Hiding my location to websites with region-specific languages/content

  - by Tudor

  I just went to download Microsoft Secority Essentials and it enraged me as it redirected me to a site in my home language and not the default English. If I go to America, I don't want them to speak Swahili. It reminded me of all the other websites who try to do the same. I don't want my content in greek when I'm on vacation! I for one simply can't work on a computer unless the language is English (or unless there's a VERY good reason to change the language). Location aware content is only good for download mirrors, and even then I would rather pick from a list of countries myself. (or if you can't speak anything but your own language) I know websites get your location from your IP and ISP, but is there any way you can inhibit this behaviour on a browser level? Is there any Chrome/Firefox extension for it? Do I really have no choice but to hide my IP? There's all sorts of services that claim they're hiding your IP for free so that people can't log and trace your steps through the internet, but they're probably logging it themselves and making money off it. Why else would they be free? I've found that Firefox has an Option that says "Choose your preferred language when displaying pages". Haven't found anything for Chrome.

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• Cisco AnyConnect VPN client - prevent connecting as work network

  - by Opmet

  From Windows 7 I'm using "Cisco AnyConnect Secure Mobility Client 3.0" to connect to our corporate network. Every time I establish the VPN connection Windows will set the type as "work network". I don't want this. So I go to "network and sharing center" and manually / interactively change it to "public network". But I have to repeat it for every new VPN connection. Is there any way to make Windows remember / persist this configuration? Can it be configured in the VPN client? Do our IT admins need to change something at server end? Motivation: A "work network" per default uses different firewall settings that allows for stuff like "network discovery" and "file shares". But I just need "remote desktop" (mstsc). Additional info: Our IT admins claimed this would be Windows default behaviour and there was nothing we could do about it: Windows would always initiate a VPN connection as "work network". Based on this statement I assume this is a "general" issue and went ahead posting here (at superuser.com).

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• Boot stuck at blinking cursor before GRUB - only works via BIOS boot menu

  - by delta1

  I have a new box running Debian Squeeze. Grub is installed on /dev/sda, but when booting up I just get a blinking cursor, before the Grub menu. I can only boot to grub successfully when I choose boot options (during post) and select that specific drive! I have made sure the correct drive is set to boot first in the BIOS. So Grub works, but the system won't boot to that drive automatically? Any ideas on what could cause this? Drives sda/b/c are all 2TB (sda runs the system with b/c as raid device md0) with the following partitions: $ cat /proc/partitions major minor #blocks name 8 0 1953514584 sda 8 1 977 sda1 8 2 9765625 sda2 8 3 6445313 sda3 8 4 1937302627 sda4 8 32 1953514584 sdc 8 16 1953514584 sdb 9 0 1953513424 md0 but # fdisk -l /dev/sda gives WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 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: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 243202 1953514583+ ee GPT Any insight into this strange behaviour would be greatly appreciated.

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• mod_rewrite with AJAX applictions: possible?

  - by MrJackV

  I am trying to run Shell In a Box (link) through another server (the computer running shellinabox is not accessible from the internet) . Ideally I could use ProxyPass in the Apache config to have a reverse proxy. Problem is I can't access the conf file. So I tried using .htaccess and I discover that I cannot use ProxyPass in there. So I tried and used mod_rewrite to do the job. Currently I have the following on the .htaccess file RewriteEngine On RewriteRule ^$ http://10.1.13.236:4200/ [P] However while it displays the title correctly and if I open up the source code I can see there is something in the page, nothing is diplayed on the screen (it remains blank). My suspicion is that there are problems with AJAX and this kind of proxy. What I am trying to accomplish with the mod_rewrite as close as possible behaviour to ProxyPass (Mirorr a website in a subdirectory). Is this possible? Is there some other solution (I tried phproxy and khproxy but neither of them is able to display anything)? Thanks in advance

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