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• What parts should I get for an ASRock x58 Extreme motherboard

  - by Brad Gilbert

  I just received an ASRock x58 Extreme motherboard, for my post on this question. It was a 2009 Tom's Hardware recommended buy. It is a Core i7 motherboard, with an X58 Express Chipset. It uses DDR3 RAM. What I want to know is, what parts should I get to finish it off. I'm looking for some good bargains, because of a lack of funds. The most taxing game I will probably play on it is OpenTTD. The only parts I currently have that are compatible: A Dynex 400W power supply. It appears to be an ATX 2.1 power supply, with the addition of a -5 rail. Apparently designed to be compatible with most ATX-style motherboards. Several PCI add-in cards. Mostly 10/100 Network cards Some sound cards Some video cards with a VGA connector Plenty of PATA drives. 8 GB - 80 GB Hard-drives A dozen or-so CD-ROM drives, only a handful of them are CD-RW drives. One DVD-ROM drive I have one LCD, with a 15 pin VGA connector, which I salvaged from the dump. The only thing wrong with it was some dead capacitors. It also has a stuck pixel.

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• vagrant and puppet security for ssl certificates

  - by Sirex

  I'm pretty new to vagrant, would someone who knows more about it (and puppet) be able to explain how vagrant deals with the ssl certs needed when making vagrant testing machines that are processing the same node definition as the real production machines ? I run puppet in master / client mode, and I wish to spin up a vagrant version of my puppet production nodes, primarily to test new puppet code against. If my production machine is, say, sql.domain.com I spin up a vagrant machine of, say, sql.vagrant.domain.com. In the vagrant file I then use the puppet_server provisioner, and give a puppet.puppet_node entry of “sql.domain.com” to it gets the same puppet node definition. On the puppet server I use a regex of something like /*.sql.domain.com/ on that node entry so that both the vagrant machine and the real one get that node entry on the puppet server. Finally, I enable auto-signing for *.vagrant.domain.com in puppet's autosign.conf, so the vagrant machine gets signed. So far, so good... However: If one machine on my network gets rooted, say, unimportant.domain.com, what's to stop the attacker changing the hostname on that machine to sql.vagrant.domain.com, deleting the old puppet ssl cert off of it and then re-run puppet with a given node name of sql.domain.com ? The new ssl cert would be autosigned by puppet, match the node name regex, and then this hacked node would get all the juicy information intended for the sql machine ?! One solution I can think of is to avoid autosigning, and put the known puppet ssl cert for the real production machine into the vagrant shared directory, and then have a vagrant ssh job move it into place. The downside of this is I end up with all my ssl certs for each production machine sitting in one git repo (my vagrant repo) and thereby on each developer's machine – which may or may not be an issue, but it dosen't sound like the right way of doing this. tl;dr: How do other people deal with vagrant & puppet ssl certificates for development or testing clones of production machines ?

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• Windows Server 2008 R2 DNS - One IP, multiple servers

  - by Blu Dragon

  I need opinions and examples on how to best to accomplish the setup I am looking for. I have a public-facing AD domain server with one public IP address. I have setup an external zone for example.com and I successfully have my own name servers pointing to it at ns0.example.com and ns1.example.com. I also have an internal zone for my private network at home.example.com. I am behind a router with the domain server in the DMZ. I want dev.example.com to be accessible from the outside world over https and to point to internal IP address 192.168.1.78. Likewise, I want www.example.com to be accessible from the outside world and point to internal IP address 192.168.1.79. Both dev and www servers are CentOS 5.6 VMs running inside of Hyper-V on the domain server (bad idea I know but I am limited on hardware atm). What is best way to achieve this? From what I have read and researched on Google, I may need to setup a reverse proxy but I am not sure how well that will work with SSL.

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• SFTP only works occasionally

  - by 82din

  I suddenly get this error using SFTP: Status: Connecting to example.com... Response: fzSftp started Command: open "[email protected]" 22 Command: Pass: ********* Status: Connected to example.com Status: Retrieving directory listing... Command: pwd Response: Current directory is: "/root" Command: ls Status: Listing directory /root Error: Connection timed out Error: Failed to retrieve directory listing I tried using FileZila, Cyberduck, Shell (Terminal), same result. However, it worked fine today (just a few seconds) in Passive mode. I guess something changed in my network, so I have tried both: Active and Passive mode: Connecting to probe.filezilla-project.org Response: 220 FZ router and firewall tester ready USER FileZilla Response: 331 Give any password. PASS 3.6.0.2 Response: 230 logged on. Checking for correct external IP address Retrieving external IP address from http://checkip.dyndns.org:8245/ Checking for correct external IP address IP <external IP> big-bf-ccc-f Response: 200 OK PREP 49565 Response: 200 Using port 49565, data token 380352881 PORT 186,15,222,5,193,157 Response: 200 PORT command successful LIST Response: 150 opening data connection Response: 503 Failure of data connection. Server sent unexpected reply. Connection closed Because I'm working behind a router, I get my external IP from http://checkip.dyndns.org:8245/ I also tested different range of ports.

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• kickstart ks.cfg: Where should 'url' point?

  - by Stefan Lasiewski

  I have a kickstart file (ks.cfg) on a floppy (Old style). I am trying to install CentOS 5.4. The top of my ks.cfg says this: install # Install from local cdrom or over the network. #cdrom url --url http://kickstart.example.org/pub/centos/5.4/ On the Apache server side, this command is failing with these 404s: kickstart.example.org 192.168.16.180 - - [01/Jun/2010:17:24:30 -0700] "GET /pub/centos/5.4///disc1/.discinfo HTTP/1.1" 404 314 "-" "urlgrabber/3.1.0" kickstart.example.org 192.168.16.180 - - [01/Jun/2010:17:24:43 -0700] "GET /pub/centos/5.4/repodata/repomd.xml HTTP/1.1" 404 316 "-" "urlgrabber/3.1.0 yum/3.2.22" It seems that the value of my url doesn't match the directory structure on the server. I swear this worked a few months ago. Someone else maintains the Yum repository, and they say nothing has changed. What should the value of url URL be? Should this only include the OS (/pub/centos/5.4/), or should it include the architecture (/pub/centos/5.4/os/x86_64 )? I see that Kickstart is trying to grab a file called 'repomd.xml', but why is it looking in '/pub/centos/5.4/repodata/repomd.xml', when these files actually exist at '/pub/centos/5.4/os/x86_64/repodata/repomd.xml' and other locations at '/pub/centos/5.4/*/$ARCH/repodata/repomd.xml'? I don't see this documented or explained well in the [RedHat 5 Installation Guide1]

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• Service Unavailable - App Pool disabled error...anyone know why?

  - by andy

  Hi guys A small number of our sites intermediately experience an error that is a mystery to us. Our set up is: Windows Server 2003 IIS6 .NET 3.5 We have about 35 Websites running on IIS Each site has it's own App Pool Each App Pool has the identity: Network Service The symptom is: The Application Pool for a site stops, and when you browse to the site, you only see: SERVICE UNAVAILABLE In the Event Logs, we have one Error, that looks like this: Application pool 'AppPool1' is being automatically disabled due to a series of failures in the process(es) serving that application pool. And we have several Warnings leading up to the error, that look like this (note: the warnings look the same, except for the process id): A process serving application pool 'AppPool1' suffered a fatal communication error with the World Wide Web Publishing Service. The process id was '292'. The data field contains the error number. What's causing this? As I said, it doeasn't happen very often....the last time was about 6 months ago...and it usually happens with the same site/App pool. Any ideas? cheers!

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• Xen networking is inconsistent in multiple ways

  - by WildVelociraptor

  I've been running xen for a few weeks now on an Ubuntu 12.04 server. I've got 3 guests: a Windows Server 2003 guest, an Ubuntu guest, and a Windows 7 Guest. My Server 2003 guest seems to work fine; I can ping it from the network, the hostname resolves correctly, and it can see the internet. This guest is attached to xenbr0, and its IP is 10.100.1.21. My Win7 guest is what is driving me crazy. I use the same configuration script as a base, changing the important parts (hostname and boot disk, mainly). It installed correctly, and is currently running, but I am unable to ping this guest. It's hostname is "alexander", with an IP of 10.100.1.22. It is also using xenbr0. The guest can ping the firewall and various IP addressess, but seems unable to resolve hostnames. Now heres the weird part: when I use rdesktop (RDP client) from my laptop (not the xen host) to connect to alexander, it works just fine. It apparently resolves the hostname fine, and does the same with the IP address. So, can someone tell me why I can access this guest using RDP, but not using ping, nslookup, traceroute, etc? It's apparently invisible to all but RDP. Also, is it okay to use two guests on the same bridge, or do i need different ones for each guest? Thanks in advance for any help. Regards

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• Difference between "traceroute" and "traceroute -U"

  - by AndiDog

  The manpage of traceroute says that the "-U" parameter (UDP probing) is the default, but I'm getting different results every time. With "-U": traceroute -U www.univ-paris1.fr traceroute to www.univ-paris1.fr (193.55.96.121), 30 hops max, 60 byte packets [...] 13 rap-vl165-te3-2-jussieu-rtr-021.noc.renater.fr (193.51.181.101) 59.445 ms 56.924 ms 56.651 ms [...] 18 * paris1web.univ-paris1.fr (193.55.96.121) 23.797 ms 23.603 ms but the normal traceroute gives me another result (never reaches the final node) - it's either "!X" or just exits after the maximum of 30 hops: traceroute www.univ-paris1.fr traceroute to www.univ-paris1.fr (193.55.96.121), 30 hops max, 60 byte packets [...] 11 te1-1-paris1-rtr-021.noc.renater.fr (193.51.189.38) 28.147 ms 28.250 ms 28.538 ms [... non-responding nodes ...] 28 site-1.03-jussieu.rap.prd.fr (195.221.126.58) 85.941 ms !X * * Note: I tried this very often and always get the same results. The path in my local network is always the same. So what does the "-U" parameter actually change here? I'm especially interested what the reason for "!X" could be (communication administratively prohibited). EDIT: If that helps, paris-traceroute gives me the following for the last hop: 14 P(1, 6) site-1.03-jussieu.rap.prd.fr (195.221.126.58) 34.938 ms !5 !T2 which means that node discards the packet with TTL=2 and returns an unknown message (not "destination unreachable" or the like).

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• Vyatta masquerade out bridge interface

  - by miquella

  We have set up a Vyatta Core 6.1 gateway on our network with three interfaces: eth0 - 1.1.1.1 - public gateway/router IP (to public upstream router) eth1 - 2.2.2.1/24 - public subnet (connected to a second firewall 2.2.2.2) eth2 - 10.10.0.1/24 - private subnet Our ISP provided the 1.1.1.1 address for us to use as our gateway. The 2.2.2.1 address is so the other firewall (2.2.2.2) can communicate to this gateway which then routes the traffic out through the eth0 interface. Here is our current configuration: interfaces { bridge br100 { address 2.2.2.1/24 } ethernet eth0 { address 1.1.1.1/30 vif 100 { bridge-group { bridge br100 } } } ethernet eth1 { bridge-group { bridge br100 } } ethernet eth2 { address 10.10.0.1/24 } loopback lo { } } service { nat { rule 100 { outbound-interface eth0 source { address 10.10.0.1/24 } type masquerade } } } With this configuration, it routes everything, but the source address after masquerading is 1.1.1.1, which is correct, because that's the interface it's bound to. But because of some of our requirements here, we need it to source from the 2.2.2.1 address instead (what's the point of paying for a class C public subnet if the only address we can send from is our gateway!?). I've tried binding to br100 instead of eth0, but it doesn't seem to route anything if I do that. I imagine I'm just missing something simple. Any thoughts?

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• Mystery Print Separator Page

  - by Jesse Bradlee

  Good morning! After a recent site upgrade to WebSphere 7.0 from 6.1 on an AIX server, our users reported a print separator page appearing on a certain type of report, and only on one printer. Trouble is, no one (devs, sysadmins, users) knows where it came from or where to turn it off. Based on the info, the first step was to check the app, but we don't have print separators in our code. The report they're using also lacks even an option to separate. Then I asked the WebSphere gurus but they shook their heads. Ditto the network/print server team. If anyone can identify the source of this separator, I can take that back to the relevant team and have it switched off. They look like this (some whitespace removed for brevity): *################################################## *################################################## *################################################## *************************************************** TITLE: [document name] TIME PRINTED: Fri Sep 20 08:21:45 2013 TIME QUEUED: Fri Sep 20 08:21:45 2013 PRINTED AT: hp@hp41 (generic) @ [app name] SUBMITTED BY: root DELIVER TO: =====> root <===== *************************************************** FLAG VALUES: a-0, b=0, d=a, f=, g=1, h=, i=0, j=+, l=00, p=10, t=0, v=6, w=3--, x=2, A=1, B=gn, C=!, H=, J=+, L=+, N=1, P=[printer name]:hp@hp41, X=ISO8859-1, Z=+, 0=ibm.850 *************************************************** Thank you!

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• How does the LeftHand SAN perform in a Production environment?

  - by Keith Sirmons

  Howdy, I previously asked this ServerFault question: Does anyone have experience with lefthands VSA SAN The general consensus looks like it does not perform well enough for a production SQL server even at a light load. So the new question is, How does LeftHand's SAN perform on the HP or Dell dedicated Hardware boxes? We are looking at the Starter SAN with 2 HP nodes in a 2-way replication, 2 ESX servers hosting a total of 2 Active Directory server, 1 MS SQL server, 1 File Server, and 1 General Purpose Server for things like Virus Scan (All Microsoft Server 2005 or 2008). The reason I am looking at LeftHand is for the complete software package. I plan to have a DR site and like how the SAN can perform an Async Replication to the offsite location without having to go back to the Vendor for more licenses. I also like the redundancy built into the Network Raid architecture. I have looked at other SANS and found different faults with them. For example, Dell's EqualLogic: Found that although the individual box is very redundant in hardware, the Data once spanned across multiple boxes is not redundant, if a node goes down you have lost the only copy of the data sitting on that hardware (One thing is certain, all hardware fails... When? is the only question.). I have used an XioTech SAN as well.. Well worth the money BTW, but I think it is overkill for the size of the office I am targeting. The cost to get the hardware redundancy in the XioTech makes it a little out of reach for the budget I am working in. Thank you, Keith

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• VMware ARP/Mac Networking

  - by Ross Wilson

  Hi Guys, I am very interested in how VMware networking works. I have scoured the VMware website and read their data sheets, this has given me some basic knowledge. I now have some questions. Lets assume that we have a physical server running the VMware hypervisor. The physical server is running a Virtual Machine. The physical box has one physical NIC. The NIC is connected to a switch, as so is a desktop client. Now, this is where my first question lies. The VM has an IP address: 192.168.1.1. How do desktop clients on the network communicate with this VM? So, the client pings 192.168.1.1. The ping packet is sent to the switch. The switch checks its MAC address table and sees that 192.168.1.1 is associated with the MAC address of the physical NIC. Correct? I then assume that the ping packet is sent to the server's physical NIC, where the hypervisor routes the packet to the VM thats using 192.168.1.1? Please could you give me a run down as to how VM networking works? Many thanks, Ross

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• Filtered Router Interface

  - by jviotti

  I'm having some problems with a Scientific-Atlanta DPR2320R2. In specific with the WIFI. A few months ago I changed its password and username and now I can't remember. So I tried cracking it with Hydra but it drove things worse. Content of webadmin was rendered partial, and threw lot of errors. I then reseted the router. I found myself abled to browse the web with ethernet-connected pc. Wifi is configured by registering the device's MAC Address, and indeed the router has been reseted and register MAC address were lost. No device could connect to wifi. In fact, the device does not even recognize the network. I tried the pointing to 192.168.0.1 to restablish the MAC's. But I couldn't connect to the router access point. Tried listing up hosts: $ nmap -sP 192.168.0.0/24 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:18 ART Host 192.168.0.1 is up (0.0018s latency). Host 192.168.0.11 is up (0.00025s latency). Nmap done: 256 IP addresses (2 hosts up) scanned in 59.62 seconds Then checked 192.168.0.1 was really up by sending pings. It responded to all my pings. I quick-scanned the access point: $ nmap 192.168.0.1 Starting Nmap 5.00 ( http://nmap.org ) at 2012-12-11 01:08 ART Interesting ports on 192.168.0.1: Not shown: 999 closed ports PORT STATE SERVICE 80/tcp filtered http Nmap done: 1 IP address (1 host up) scanned in 6.73 seconds Look the state of the port 80: FILTERED. I'm pretty confused now. Any suggestion would be appreciated. Thanks in advance.

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• What keeps you from changing your public IP address and wreak havok?

  - by Whitemage

  An interesting question was asked to me and I did not know what to answer.. So I'll ask here. Let's say I subscribed to an ISP and I'm using cable internet access. ISP gives me a public IP address of 60.61.62.63. What keeps me from changing this IP address to, let's say, 60.61.62.75 and mess with another consumer's internet access? For the sake of this argument, let's say that this other IP address is also owned by the same ISP. Also, let's assume that it's possible for me to go into the cable modem settings and manually change the IP address. Under a business contract where you are allocated static addresses, you are also assigned a default gaetway, a network address and a broadcast address. So that's 3 addresses the ISP "loses" to you. That seems very wastefull for dynamically assigned IP addresses where the majority of customers are.. Could they simply be using static arps? ACLs? Other simple mechanisms? Anyone who worked at an ISP would be willing to explain this a bit?

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• VPN with client-to-client direct connectivity?

  - by Johannes Ernst

  When setting up a VPN, clients (say client1 and client2) usually authenticate to a server, and together the three constitute the VPN. When client1 wishes to send a packet to client2, this packet usually gets routed by way of server. Are there products / configuration blueprints for products where it is possible to send packets directly from client1 to client2 without going though server? (if the underlying network topology permits it, e.g. no firewalls in the way) If not, is there a way by which client1 can send a packet to client2 by way of server, without the server being able to snoop on the content of the packet? (E.g. because the packet is encrypted with the public key of client2) I just asked in the OpenVPN forum, and the answer I got was "not with OpenVPN". So my question is: are there other products with which this is possible? Open-source preferred ... One use case: client1 and client2, typically in separate offices, find themselves both at headquarters. Do they still need to talk to each other via the public internet? Links appreciated. Thank you.

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• What is preventing my computer from going idle?

  - by brianberns

  When I first boot my Windows 7 computer, it will go idle if I stop using it - first the screensaver comes on, then the computer goes to sleep after a certain amount of time. This is the expected behavior. However, after I've used the computer for awhile without rebooting (after about a day or so), I've noticed that it stops going idle - the screensaver won't come on, and the computer won't sleep, no matter how long it sits unused. I've confirmed that the idle timer is increasing as expected via GetLastInputInfo. However, it looks like something is interfering with the results from CallNtPowerInformation. Every 14 or 16 seconds, the TimeRemaining value jumps back up to its maximum value when I query SystemPowerInformation. I've used the SysInternals Process Monitor to detect any unusual events that might be happening to trigger this reset, but come up empty. Does anyone know exactly what are the possible causes of TimeRemaining resetting to its maximum value? I'm fairly sure that it's not my mouse, keyboard, or network sending spurious events, because I've disabled each one and the problem continues to occur. This would also reset the GetLastInputInfo timer, which is not happening. I'm looking for something that affects SystemPowerInformation TimeRemaining, but does not affect GetLastInputInfo. Thanks.

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• SQL Server Analysis Services, DNS, AD, Kerberos, Connection Issues

  - by ScaleOvenStove

  Running into a very weird issue. Converting servers to Windows 2008/SQL 2008. Have a server, SERVER_A, brand new, setup with Win2k8,Sql2k8 - works. Have a Server SERVER_B, running Windows2003/SQL2005. I want to migrate from SERVER_B to SERVER_A. I have all db's, cubes, etc setup on SERVER_A and it is mimicking functionality. Since users are using Excel to connect to SSAS, they connection string has SERVER_B in it. What I want to do, is, change DNS on the network to point SERVER_B (by name) at the ip of SERVER_A. I have successfully done this with another server, SERVER_C, but I need to do it with SERVER_B. What I have found is that with SERVER_C, after changing DNS, had to remove SERVER_C from AD and then it worked. I could connect to SERVER_C (DB), SERVER_C (SSAS Default Instance) and SERVER_C (SSAS Named instance) and it all was actually connecting to SERVER_A I tried to do the same with with SERVER_B, and no luck. Changed DNS, removed from AD, and it wouldn't connect. Found out that there were some SPN's in AD set up, so removed those and tried again. I then could connect to SERVER_B (DB), SERVER_B (SSAS Named Instance), but not SERVER_B (SSAS Default Instance). I could connect to SERVER_B (SSAS Default Intance WITH the Port #), but I need to be able to connect without the port number. I am at a loss to as why I can't connect to the default instance without a port #. Not sure if it is SPN's in AD, or another AD issue, or something else. Pretty sure it isnt something on the server (because SERVER_C works!) Any insight or suggestions would be greatly helpful!!

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• PNP4Nagios, nagiosgraph, separate Cacti, or something else for Nagios trending

  - by Matt

  I've been using Nagios for a while now and recently started using Cacti after being dissatisfied with the lack of scaling and lack of any GUI in MRTG. I'm interested in adding trending to my Nagios installation and wondered what was the best route to go. I've looked around a bit and have seen what's available, but there's not a lot of information around to differentiate them from each other. My Nagios install has about 250 hosts and 1100 service checks, but many of them are just simple network devices and there's only about 20 servers and 300 services associated with them. All servers but 2 are running Windows Server 2003. What are the main highlights of PNP4Nagios vs. nagiosgraph, or would I be better off using some sort of tool to convert the data to RRD form and just view it directly in Cacti? Is there a completely different direction I could go that would be even better? Please comment if you need any more information, I tend to be too wordy and tried to keep this question brief. Thanks!

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• DNS Does Not Register at Off-site Locations

  - by Russ Warren

  First of all, let me give you the specifics of our setup: Windows Small Business Server 2008 Domain w/ all applicable updates on the DC The DC does DHCP for the main site The DC does DNS for all sites 3 sites including our headquarters where the DC is located All sites are connected through OpenVPN SSL tunnels terminated by an Untangle box at each site The 2 remote sites us the Untangle box as a DHCP server for their subnet, which assigns the DC as the primary DNS server Collection of Windows XP and Windows 7 workstations connected to the domain Here's the issue: All of the workstations at the main site register with the DNS server on the domain controller fine. As they grab an IP from the DHCP server, it updates the DNS server with the new host record. I have 2 systems (each at different remote sites) that fail to register with the DNS server. I've attempted the following troubleshooting steps: Confirmed the network adapter is using the DC as a DNS server Confirmed 2-way traffic is possible between DC and workstation Verified the "Register with DNS server" setting was checked in the adapter properties Attempted ipconfig /registerdns and received no errors For the time being, I have setup a DHCP reservation for these systems and manually created a host record. This seems to work fine, but I need a solution for any new systems that go out there.

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• IIS FTP error: 426 Connection closed; transfer aborted.

  - by Jiaoziren

  Hi, I have an IIS FTP set up on Windows 2003 SP2 (S1). Everyday in the early morning, a script on another server (S2) will run and initiate FTP transfer of pulling log files from S1 to S2. The FTP client we're using is built-in FTP.exe in Windows 2000 on S2. Recently we replaced S1 with a new server however we kept the IP address. There are multiple IP addresses on new S1. Ever since the new S1 was in place, the '426 Connection closed; transfer aborted.' errors haven been occuring randomly. The log indicated that the transfer started ok however the file cannot be transferred completely, as per log below: mget access*.log 200 Type set to A. 200 PORT command successful. 150 Opening ASCII mode data connection for access02232010.log(205777167 bytes). 426 Connection closed; transfer aborted. ftp: 20454832 bytes received in 283.95Seconds 72.04Kbytes/sec. The firewall monitor suggested that the connection was setup in passive mode however I've been told that MS FTP.exe doesn't support passive mode. Though I can see the response of 'entering passive mode' from server when typing in 'quote pasv'. My network admin has told me to try the transfer in active mode however I don't know how to open active mode on client side. It's getting really frustrating. Wish someone here has the right knowledge/experience could shed me a light. Cheers.

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• Shared printer stops working on clients but not host computer

  - by Tony

  I have a Brother MFC-7420 USB all-in-one laser printer. It is plugin via USB to my Windows 7 x64 machine. I have it shared to a few users on my home network. My wife's laptop running Vista x64 can normally print fine to the printer. However it seems that every day or two, when she pushes print on a something it just sits in her laptop's print queue and never makes it to my desktop. The only thing that seems to fix this is if she restarts her laptop. Not a big deal but this problem is sort of annoying. I don't know if this affects but the laptop is put into hibernate at night and I turn my desktop off at night. Does anyone know why this happens and if there is something easy to do to fix the problem besides restart the computer? EDIT: I was thinking that maybe my wife's laptop loses its connection to the printer. Is there a way to reset a connection to a shared printer? Or maybe reauth with the printer?

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• Login failed for user 'XXX' on the mirrored sql server

  - by hp17

  We have 4 web servers that host our asp.net (3.5) application. Randomly, we get error messages like : 1) "Login failed for user 'userid'" 2) "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)" we are running sql2005 and have a principle and a mirror db (sync). When these exceptions are thrown, I look at the SQL error logs on the mirrored db and noticed the failed login messages in there. The principle db is running fine and the other web apps are working great. this will happen for maybe 10 min, then the app pool recycles and it starts hitting the principle db again. Is there a configuration I have incorrect? my theory is that our principle db is forwarding the request to the mirror, but that should never happen. any help??

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• Simple end-to-end load and bottleneck monitoring for DB-based web sites

  - by T.J. Crowder

  What tools do you use / would you recommend for monitoring a Linux-based, DB-based website's servers for bottlenecks and load? The obvious goal being to know when growth has gotten to the point where it's necessary to scale up (or out) one or more of the bits and pieces because the current system won't be managing the load if an observed trend continues. I'm looking for general recommendations based on standard Linux load metrics, disk I/O metrics, network I/O metrics, etc., but if specifics are helpful: It'll be Tomcat6 using APR (possibly with a Varnish or similar caching and balancing front-end), MySQL, and either Ubuntu 8.04 LTS or 10.04 LTS depending on timing. I know about top, vmstat, iostat, bwmon and the like that collect and parse info from the /proc file system (et. al.); and obviously MySQL provides a lot of queriable performance information. I could use those directly, probably automating periodic monitoring logs with scripts and such. But I have a suspicion that I'd be reinventing a wheel... For example, Hyperic HQ seems to be along the lines of what I'm looking for. Others? Meta: I tend to think of "recommendation" questions as needing to be CW because there's no one right answer, but I see a lot of these here that aren't CWs, so I haven't marked it as one. I'll happily do so if enough people think I should.

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• How to edit files directly on webdav in windows.

  - by phazei

  I have a webDAV setup with the cPanel webdisk. I can connect to it through NetHood and I can drag and drop files to/from there. What I can't do is simply edit any of the files directly. I need to copy it somewhere else, edit it, then copy it back. That's essentially what is needed with ftp, though smart clients will monitor the file, making it easier than webDAV in the current state I'm using it in. I was under the impression that webdav was supposed to let me work on the files as if it were a local drive. But nothing can actually open the files. How can I go about bringing more functionality around to it? Or is this as good as it gets? I have tried 'net use q:\ https://myserver.com:2078' and 'net use q:\ '\myserver.com@SSL:2078\' but neither work and only throws: "System error 67 has occurred. The network name cannot be found." I ultimately want to use TortiseSVN with the webDAV so I can have my working copy running on the server.

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• MySQL-Cluster or Multi-Master for production? Performance issues?

  - by Phillip Oldham

  We are expanding our network of webservers on EC2 to a number of different regions and currently use master/slave replication. We've found that over the past couple of months our slave has stopped replicating a number of times which required us to clear the db and initialise the replication again. As we're now looking to have servers in 3 different regions we're a little concerned about these MySQL replication errors. We believe they're due to auto_increment values, so we're considering a number of approaches to quell these errors and stabilise replication: Multi-Master replication; 3 masters (one in each region), with the relevant auto_increment offsets, regularly backing up to S3. Or, MySQL-Cluster; 3 nodes (one in each region) with a separate management node which will also aggregate logs and statistics. After investigating it seems they both have down-sides (replication errors for the former, performance issues for the latter). We believe the cluster approach would allow us to manage and add new nodes more easily than the Multi-Master route, and would reduce/eliminate the replication issues we're currently seeing. But performance is a priority. Are the performance issues of MySQL-Cluster as bad as people say?

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