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• Moving server room to another part of the building

  - by PHLiGHT

  This question is a bit different than the typical we are moving our server room to an off site location or we are moving the whole office to a new building. Management wants to add some more office space and to do so they want to move the server room to another location. The server room has Verizon smart jacks, a few servers, PBX and all the office network drops go into this room. I'm going to go over there to scout out an alternate location for the equipment because that is still TBD. This sounds like quite a pain since the Verizon equipment for our MPLS will need to be moved (never done that) and the office jacks will need to be re-run. How do you handle the jacks? I was thinking of keeping them in the same location and having new wall plates put in with half the ports going to the current location and the other half to the new location. Or do you think that 40 drops could just be done over the weekend so the old stuff would be ripped out and replaced with the new? Currently the wiring is a mess so this could be a blessing in the long run.

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• VLAN for WiFi traffic separation (new to VLANing)

  - by Philip

  I run a school network with switches in different departments. All is routed through to a central switch to access the servers. I would like to install WiFi access points in the different departments and have this routed through the firewall (an Untangle box that can captive-portal the traffic, to provide authentication) before it gets onto the LAN or to the Internet. I know that the ports that the APs connect to on the relevant switches need to be set to a different VLAN. My question is how do I configure these ports. Which are tagged? Which are untagged? I obviously don't want to interrupt normal network traffic. Am I correct in saying: The majority of the ports should be UNTAGGED VLAN 1? Those that have WiFi APs attached should be UNTAGGED VLAN 2 (only) The uplinks to the central switch should be TAGGED VLAN 1 and TAGGED VLAN 2 The central switch's incoming ports from the outlying switches should also be TAGGED VLAN 1 and TAGGED VLAN 2 There will be two links to the firewall (each on its own NIC), one UNTAGGED VLAN 1 (for normal internet access traffic) and one UNTAGGED VLAN 2 (for captive portal authentication). This does mean that all wireless traffic will be routed over a single NIC which will also up the workload for the firewall. At this stage, I'm not concerned about that load.

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• Correct use of SMTP "Sender" header?

  - by Eric Rath

  Our web application sends email messages to people when someone posts new content. Both sender and recipient have opted into receiving email messages from our application. When preparing such a message, we set the following SMTP headers: FROM: [email protected] TO: [email protected] SENDER: [email protected] We chose to use the author's email address in the FROM header in an attempt to provide the best experience for the recipient; when they see the message in their mail client, the author is clear. To avoid the appearance of spoofing, we added the SENDER header (with our own company email address) to make it clear that we sent the message on the author's behalf. After reading RFCs 822 and 2822, this seems to be an intended use of the sender header. Most receiving mail servers seem to handle this well; the email message is delivered normally (assuming the recipient mailbox exists, is not over quota, etc). However, when sending a message FROM an address in a domain TO an address in the same domain, some receiving domains reject the messages with a response like: 571 incorrect IP - psmtp (in reply to RCPT TO command) I think this means the receiving server only saw that the FROM header address was in its own domain, and that the message originated from a server it didn't consider authorized to send messages for that domain. In other words, the receiving server ignored the SENDER header. We have a workaround in place: the webapp keeps a list of such domains that seem to ignore the SENDER header, and when the FROM and TO headers are both in such a domain, it sets the FROM header to our own email address instead. But this list requires maintenance. Is there a better way to achieve the desired experience? We'd like to be a "good citizen" of the net, and all parties involved -- senders and recipients -- want to participate and receive these messages. One alternative is to always use our company email address in the FROM header, and prepend the author's name/address to the subject, but this seems a little clumsy.

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• How should I perform database maintenance on a 24x7 system

  - by solublefish

  I'm a software developer who inherited a part-time DBA role. I'm responsible for an application backed by a small, high-volume 24x7 database on SQL Server 2008. While there's other stuff in the DB, the critical piece is a 50GB, 7.5M row table that serves 100K requests/sec during peak load, and about half that at "night". This is 99%+ read traffic, but the writes are constant, and required. I need to be able to perform periodic maintenance without a maintenance window. Say an index rebuild, a job to purge old data, Windows Update, or hardware upgrade. Most of the advice I've seen is along the lines of "MAKE a maintenance window." While I appreciate the sentiment, I hope there's another way. If it will solve this problem, I do have the ability to purchase new hardware or modify the database, the clients (a set of web services servers), and much of the application code (ADO.NET + ASP.NET). I've been thinking along the lines of using the warm spare (or a 3rd server) to do the maintenance, and then "swap" it into production. 1 Synchronize the spare by restoring backups, including a current transaction log. 2 Perform the maintenance tasks. 3 Reconfigure clients to connect to the spare server. Existing connections are finished within a minute or so. 4 The spare server is now the production server. The problem remaining is that the new production server is now out of date by however long it took to perform maintenance. Is there some way that the original production server can be made to queue up changes and merge them to the spare between steps 2 and 3? Any other ideas?

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• Firefox will not remember local site cookie

  - by Campo

  This is a weird one. We have a production server (Server 2008) and two staging servers (Server 2008 and Server 2003) I have sites on all of these. They all use cookies. On the Production server when browsing to our site www.supernovainteractive.com there is a cookie that detects when you visted the site and it will not refresh the logo animation (top left hand side) on clicking to another page. This works for all browsers on the production server. I’m not sure what’s going on but for some reason cookies are not working on one site in the 2008 staging server only. This is when browsing using Firefox (3.6.3) they work fine on all other browsers (IE, Chrome, Safari, Opera) In addition, the 2003 staging server works fine. You can test on the Supernova Interactive site by noticing the logo in the top left corner. It uses a cookie to detect if you’ve already seen the animation. Once you’ve seen it once, it doesn’t animate again until tomorrow. Currently, it’s animating every time. I have opened an outside facing port so others can see the issue. Http://exchange.supernova.com:10009 Any ideas on this one? Firewalls are off on the server. Notice you do not get a cookie from Exchange.supernova.com.

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• How can one use online backup with large amounts of static data?

  - by Billy ONeal

  I'd like to setup an offsite backup solution for about 500GB of data that's currently stored between my various machines. I don't care about data retention rates, as this is only a backup of, not primary storage, for my data. If the backup is stored on crappy non-redundant systems, that does not matter. The data set is almost entirely static, and mostly consists of things like installers for Visual Studio, and installer disk images for all of my games. I have found two services which meet most of this: Mozy Carbonite However, both services impose low bandwidth caps, on the order of 50kb/s, which prevent me from backing up a dataset of this size effectively (somewhere on the order of 6 weeks), despite the fact that I get multiple MB/s upload speeds everywhere else from this location. Carbonite has the additional problem that it tries to ignore pretty much every file in my backup set by default, because the files are mostly iso files and vmdk files, which aren't backed up by default. There are other services such as EC2 which don't have such bandwidth caps, but such services are typically stored in highly redundant servers, and therefore cost on the order of 10 cents/gb/month, which is insanely expensive for storage of this kind of data set. (At $50/month I could build my own NAS to hold the data which would pay for itself after ~2-3 months) (To be fair, they're offering quite a bit more service than I'm looking for at that price, such as offering public HTTP access to the data) Does anything exist meeting those requirements or am I basically hosed?

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• System State Backup Retention Policies

  - by isoscelestriangle

  I was wondering if there was a general consensus on how long to keep system state backups. I am trying to reevaluate our current backup process, and trying to get a good handle on our current storage requirements. Our current setup involves tapes and sending backups offsite with Barracuda Networks. We have been doing our system state backups with Barracuda now, which does full backups daily, leaving our storage requirements growing quite quickly. My boss is a little too gung-ho with backups and wants our system states saved for quite a while. We currently have 5 days of nightlies, 5 weeklies, 3 monthlies, and so on. I think this is quite overkill for system state backups. My boss wants the ability to go back in time to find when an issue appeared, but I don't think that is practical. Many things change in the course of several months. I also think it would be hard not to notice problems with our DCs and other servers for several months. I would think that a previous week's snapshot and the current week's dailies would suffice. Any advice or reading you can point me to? Thanks!

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• VPN on a ubuntu server limited to certain ips

  - by Hultner

  I got an server running Ubuntu Server 9.10 and I need access to it and other parts of my network sometimes when not at home. There's two places I need to access the VPN from. One of the places to an static IP and the other got an dynamic but with DynDNS setup so I can always get the current IP if I want to. Now when it comes to servers people call me kinda paranoid but security is always my number one priority and I never like to allow access to the server outside the network therefor I have two things I have to have on this VPN. One it shouldn't be accessiable from any other IP then these 2 and two it has to use a very secure key so it will be virtually impossible to bruteforce even from the said IP´s. I have no experience what so ever in setting up VPNs, I have used SSH tunneling but never an actuall VPN. So what would be the best, most stable, safest and performance effiecent way to set this up on a Ubuntu Server? Is it possible or should I just set up some kind of SSH Tunnel instead? Thanks on beforehand for answers.

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• LVM2 volume group lost

  - by MrG

  I updated one of my servers, but - although I took care not to modify - the volume groups on /dev/sdb1 were lost, although the physical volumes seem to be still there: [root@server ~]# pvscan PV /dev/sda2 VG VolGroup lvm2 [465,16 GiB / 0 free] PV /dev/sdb1 lvm2 [1,82 TiB] Total: 2 [2,27 TiB] / in use: 1 [465,16 GiB] / in no VG: 1 [1,82 TiB] [root@server ~]# pvs -v Scanning for physical volume names PV VG Fmt Attr PSize PFree DevSize PV UUID /dev/sda2 VolGroup lvm2 a-- 465,16g 0 465,16g HftbaD-MBs0-3p7D-6O13-CrzU-T9Gb-6W0ofB /dev/sdb1 lvm2 a-- 1,82t 1,82t 1,82t dD4XZP-WStA-61xV-5Sff-ifmW-R4rR-JenHoU [root@server ~]# pvck -d -v /dev/sdb1 Scanning /dev/sdb1 Found label on /dev/sdb1, sector 1, type=LVM2 001 Found text metadata area: offset=4096, size=1044480 Found LVM2 metadata record at offset=10752, size=1037824, offset2=0 size2=0 Found LVM2 metadata record at offset=9216, size=1536, offset2=0 size2=0 Found LVM2 metadata record at offset=7168, size=2048, offset2=0 size2=0 Found LVM2 metadata record at offset=5632, size=1536, offset2=0 size2=0 I attempted to fix it as described here and was able to extract the 4 meta data sets listed above (using i.e. dd bs=1 skip=5632 count=1536 if=/dev/sdb1 of=output.file), none of them includes the lv_data which I'm missing. Please advise how I could access the files which should be on /dev/sdb1 there. Any help is appreciated!

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• CLOSE_WAIT sockets burst - perhaps because of iptables settings?

  - by Fabrizio Giudici

  I have an Ubuntu 12.04 server virtual box where basically the installed software and configuration are the default ones, plus the installation of a jetty 6 server which servers a few websites. To keep things simple I didn't install apache httpd and used iptables for exposing jetty (which runs on the 8080 port) to the port 80. These are the results of /sbin/iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere localhost tcp dpt:http redir ports 8080 REDIRECT tcp -- anywhere Ubuntu-1104-natty-64-minimal tcp dpt:http redir ports 8080 Chain INPUT (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere localhost tcp dpt:http redir ports 8080 REDIRECT tcp -- anywhere Ubuntu-1104-natty-64-minimal tcp dpt:http redir ports 8080 Chain POSTROUTING (policy ACCEPT) target prot opt source destination I must confess I have a shallow comprehension of how iptables works, in particular for the different kind of chains. This thing works, but sometimes I have an explosion of sockets that stay permanently in CLOSE_WAIT state. I know about what this state means, but since I didn't write the code that manages servlets (they are handled by jetty) I can't fix the problem by patching my code. Eventually the amount of CLOSE_WAIT sockets builds up and makes the server not responsive, so I have to restart jetty. I've looked around for similar problems wth CLOSE_WAIT, and only found cases related to the programmer's code, or problems with Tomcat, not Jetty. I was wondering whether they could be related to a partially broken iptables configuration (the alternative is a bug in Jetty 6, but I first want to exclude other possible causes). Thanks.

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• Single m0n0wall - Two LAN Subnets - How To Setup

  - by SnAzBaZ

  I have two LAN subnets that I need to link together they are 192.168.4.0/24 and 192.168.5.0/24 There is a m0n0wall running on 192.168.4.1. It's LAN connection goes out to our network switch, and it's WAN port goes out to our ADSL modem. WAN is connected via PPPoE. The 192.168.4.0 subnet contains all of our office workstations. The 192.168.5.0 subnet contains development servers and test machines that need to obtain internet access and be "managed" by computers on the 192.168.4.0 subnet, but need to be on their own subnet as well. I have a Draytek 2820N configured on 192.168.5.1 with it's WAN2 port configured as 192.168.4.25 and a default gateway of 192.168.4.1. Machines on the 5.0 subnet can connect to the internet via the m0n0wall just fine. I configured a static route on the m0n0wall LAN interface, Network 192.168.5.0/24 and Gateway 192.168.4.25. Machines on the 5.0 subnet can ping machines on the 4.0 network but the reverse does not work. I configured a new firewall rule on the m0n0wall that allows any traffic on the LAN interface with a source IP of 192.168.4.25 to be allowed. The DrayTek firewall is currently configured to pass all traffic regardless. When I try to ping a machine in the 5.0 subnet from 4.0 I see this in my m0n0wall log: BLOCK 14:45:27.888157 LAN 192.168.4.25 192.168.4.37, type echoreply/0 ICMP So the reply is being sent from the 5.0 subnet but is not being allowed to reach my workstation because the firewall is blocking it. Why is the firewall blocking it ? I hope the explanation of my network is clear, please ask if you require further clarification. Thank you.

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

  - by Andrew Connell

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

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• WAMP starts Apache or Mysql, but not both?

  - by ladenedge

  When I install WAMP, the Apache and Mysql services are set to run as the LocalService user and all works well. However, because I need to access remote UNC paths in my PHP code, I need to run at least Apache as a user that exists on both the local host and the remote host - I'll call him WampUser. When both Apache and Mysql are set to start as WampUser, I cannot start both at the same time. If both are stopped, I can start either successfully. When I attempt to start the other, I get Error 1053: The service did not respond to the start or control request in a timely fashion. This error appears immediately - there is no timeout. When at least one of the services is set to start as LocalService, both start fine. I can, therefore, solve my problem by setting Apache to WampUser and Mysql to LocalService, but I'm more interested in why this is happening in the first place. I'm especially curious because this situation does not occur on other servers - something I've done to this server has made these two services exclusive when running as the same user. Here are some miscellaneous data points: I am using Windows Server 2003. I've provided recursive Full Control to the C:\wamp directory for WampUser. Nothing appears in the event log after the service fails. No log entries appear in either the Mysql log or the Apache error log. Neither application appears in the process list when the appropriate service is stopped. Any ideas?

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• Server Clustering (Django, Apache, Nginx, Postgres)

  - by system-matrix

  I have a project deployed with django, Apache, Nginx and Postgres. The project has requirement of live data viewable to customers. The projects main points are: 1. Devices in field send data to server(devices are also like website users) after login. 2. There is background import process which imports the uploaded data in postgres. 3. The webusers of the system use this data and can send commands to the devices, which devices read when they login. 4. There are also background analysis routines running on the data. All the above mentioned setup and system is deployed on one amazon EC2 cloud machine. The project currently supports over 600 devices and 400 users. But as the number of devices are increasing with time the performance of the server is going down. We want to extend this project so that it can support more and more devices. My initial thinking is, We will create one more server like current one and divide the devices amongst these to servers. But Again We need a central user and device managment point though django admin. Any Ideas? What are the best possible ways to create a scalable architecture? How can I create a Postgres Cluster and Use it with Django, if possible?

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• Installing and running two postgresql versions on different ports (or two instances of same server)

  - by Andrius

  I have postgresql 9.1 installed on my machine (Ubuntu). I need another postgresql server that would run next to the old one. Exact version does not matter, but I'm thinking of using 9.2 version. How could I properly install and run another postgresql version without screwing old one (like upgrading). So those versions would run independently on different ports. Old one on 5432 and new one on 5433 for example. The reason I need this is for two OpenERP versions databases. If I run two OpenERP servers (with different versions) on single postgresql port, it crashes because new OpenERP version detects old versions database and tries to run it, but it crashes because it uses another schemes. P.S or maybe I could just run same postgresql server on two ports? Update So far I tried this: /usr/lib/postgresql/9.1/bin/pg_ctl initdb -D main2 It created new cluster. I changed port to 5433 in new clusters directory postgresql.conf file. Then ran this: /usr/lib/postgresql/9.1/bin/pg_ctl -D main2 -l logfile start I got response server starting. But when I tried to enter new cluster's template database with: psql template1 -p 5433 I got this error: psql: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5433"? Also now when I try to stop server with: /usr/lib/postgresql/9.1/bin/pg_ctl -D main2 -l logfile start I get this error: pg_ctl: PID file "main2/postmaster.pid" does not exist Is server running? So I don't understand if server is running and what I'm missing here? Update Found what was wrong. Stupid me. I didn't notice that when I changed port in .conf file, that line was commented already. So actually I didn't change anything first time, but thought I did and it used default 5432 port.

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• Reduce "Metafile" memory usage?

  - by Jay Conrod

  My work computer (Windows 7 64-bit) spends a lot of time swapping memory when I switch between programs. This surprises me since I have 4 GB of RAM, and the programs I use aren't particularly RAM hungry (Outlook, Emacs, p4win, Firefox, various build tools). I downloaded RAMMap, and it shows over a gigabyte of memory used by "Metafile". From the Sysinternals blog: Metafile is part of the system cache and consists of NTFS metadata. NTFS metadata includes the MFT as well as the other various NTFS metadata files. ... In the MFT each file attribute record takes 1k and each file has at least one attribute record. Add to this the other NTFS metadata files and you can see why the Metafile category can grow quite large on servers with lots of files. So I understand what the "Metafile" data is... I work on large builds comprising hundreds of thousands of files (none are that big, but they add up to several gigabytes). My question is how can I reduce the amount of memory used by "Metafile"? I'm not actively using all those files at once, so why does Windows need to keep info in RAM? Restarting my machine every time I sync a new build is really annoying.

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• Office 365 domain federation conversion failed

  - by Matt Bear

  We're doing things backwards, we have an established o365 domain, with 400+ users, and are just now deploying local AD, and ADFS for SSO. Last night, after configuring my servers, I ran the powershell command convert-MSOLdomaintofederated to convert the xxx.com vanity domain to federated, it errored out with an unspecified error(Microsoft ADFS support said the error has to do with the default password settings being changed.) And when I run convert-MSOLdomaintostandard, it comes back with the domain is already standard. Also in the o365 portal it shows the domain as standard, however it is trying to process login attempts as if it were a federated domain. I've spent 5 hours total on the phone with Microsoft, and it has been escalated to their engineering department for resolution, sometime within the next few days... I need it yesterday. From what we can gather, the conversion process started, error out, changed some of the internal configurations to federated, but left the description as standard.(if that makes since). So its in a weird limbo, where its in both modes but neither at the same time. Currently, the only way to fix it is to remove the vanity domain, and re-add it. I need a way to dissociate the user accounts from xxx.com domain to allow its removal. Removal of all the users themselves is not an option.

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

  - by TheCleaner

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

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• My DNS works! But, what is the simplest way to add something to it?

  - by Alex

  This is my current DNS example.com.db zone file. I followed a tutorial. It works, because when I point to this DNS from another server via resolve.conf, it will actually forward me to the right IP when I do "ping example.com". ; ; BIND data file for example.com ; $TTL 604800 @ IN SOA example.com. info.example.com. ( 2007011501 ; Serial 7200 ; Refresh 120 ; Retry 2419200 ; Expire 604800) ; Default TTL ; @ IN NS ns1.example.com. @ IN NS ns2.example.com. example.com. IN MX 10 mail.example.com. example.com. IN A 192.168.254.1 www IN CNAME example.com. mail IN A 192.168.254.1 ftp IN CNAME example.com. example.com. IN TXT "v=spf1 ip4:192.168.254.1 a mx ~all" mail IN TXT "v=spf1 a -all" Right now, ping example.com....goes to 192.168.254.1. That's great!!! it works! My question is--how can I add something do this file so that when my other servers: ping dbserver1....goes to 44.245.66.222 ping cacheserver1 ....goes to 38.221.44.555 I want to use it like a universal hosts file for my machines.

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• Accessing a shared folder in Windows Server 2008 R2.

  - by Triztian

  Hello all, seems my involvement with computers has grown and I've found my self in the need to access a shared folder on a server. I've read some documentation and managed to set up the folder as a share, for this I created a local group and for now just one local user that has access to the share, the folder is in the public user folder and it's permissions should be (and I believe they are) read/write. The problem is that I can't connect from a remote machine I mean I don't know how the way it should be accessed, the server has a public IP and we use it also as a host to our website I don't know if that affects it though, the folder will be used as the "keeper" for the QuickBooks company files and has the database server manager installed. I've tried setting up a VPN Connection to the but no success. The server has a domain name a "http://www.example.com" that redirects to our website, I am unsure if it could be accessed that way, also the share has a location displayed when I right-click properties Heres what I've tried Setting up a VPN Connection (Windows Vista and 7) Got to the point where I got asked for credential and entered the user I created (which is not an admin) but I got a "Connection fail error 800" I suppose this is because in the domain field I entered the servers workgroup. right-click add network connection (Windows 7) Went through the wizard until I reached the point of entering the location, tried many things, the name in the share's properties(\\SOMETHING\Share), the http://www.example.com , the IP address I'm quite unfamiliar with this, so I have my guesses: Since the group and user are local they do not have access to the folder. The firewall in the server is blocking my connection. Anyways, any help and guidence is truly appreciated.

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• server 2008 r2 stuck on installing updates

  - by volody

  I have 2008 r2 64bit server that is stuck on installing updates. It shows message "Please do not power off or unplug your machine. Installing 57 of 61.." This message is shown for 3 hours now. I was trying to connect to this server using mmc. runas /user:AdministratorAccountName@ComputerName "mmc %windir%\system32\compmgmt.msc" RUNAS ERROR: Unable to run - mmc C:\Windows\system32\compmgmt.msc 1311: There are currently no logon servers available to service the logon request. What else can I do? Update: Remote Desktop does not work. It just disappear after entering username and password from Win7-64 computer Update: I have disconected server. Now Server Manager in Roles Summary shows message "Unexpected error refreshing Server Manager: The remote procedure call failed." Event log shows Could not discover the state of the system. An unexpected exception was found: System.Runtime.InteropServices.COMException (0x800706BE): The remote procedure call failed. (Exception from HRESULT: 0x800706BE) at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) at Microsoft.Windows.ServerManager.ComponentInstaller.ThrowHResult(Int32 hr) at Microsoft.Windows.ServerManager.ComponentInstaller.CreateSessionAndPackage(IntPtr& session, IntPtr& package) at Microsoft.Windows.ServerManager.ComponentInstaller.InitializeUpdateInfo() at Microsoft.Windows.ServerManager.ComponentInstaller.Initialize() at Microsoft.Windows.ServerManager.Common.Provider.RefreshDiscovery() at Microsoft.Windows.ServerManager.LocalResult.PerformDiscovery() at Microsoft.Windows.ServerManager.ServerManagerModel.CreateLocalResult(RefreshType refreshType) at Microsoft.Windows.ServerManager.ServerManagerModel.InternalRefreshModelResult(Object state) Update: Manual update hangs on (Installing update 58 of 62...) Seurity Update for Windows Server 2008 R2 x64 Edition (KB979309) Update: It could be an issue with that admin user was renamed

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• Where to put the SPF TXT record?

  - by YellowSquirrel

  I've set up Google apps for my domain: I've registered the domain with Google by adding the CNAME Google asked and I've apparently succesfully setup the MX Google mail servers. So far I haven't yet a dedicated server: I'm just having a domain at a registrar. Now I want to activate SPF and I'm confused. In the following short webpage: http://www.google.com/support/a/bin/answer.py?answer=178723 it is written that I must add a TXT record containing: v=spf1 include:_spf.google.com ~all Where should I enter this? Should this go in the zone (?) file, like I did for the CNAME and the MX records? So far I have something like this: @ 10800 IN A 217.42.42.42 @ 10800 IN MX 5 ASPMX3.GOOGLEMAIL.COM. @ 10800 IN MX 5 ASPMX2.GOOGLEMAIL.COM. @ 10800 IN MX 3 ALT2.ASPMX.L.GOOGLE.COM. @ 10800 IN MX 3 ALT1.ASPMX.L.GOOGLE.COM. @ 10800 IN MX 1 ASPMX.L.GOOGLE.COM. google8a70835987f31e34 10800 IN CNAME google.com. Does adding the SPF TXT record mean I should literally have something like that: @ 10800 IN A 217.42.42.42 @ 10800 IN MX 5 ASPMX3.GOOGLEMAIL.COM. @ 10800 IN MX 5 ASPMX2.GOOGLEMAIL.COM. @ 3600 IN TXT "v=spf1 include:_spf.google.com ~all" @ 10800 IN MX 3 ALT2.ASPMX.L.GOOGLE.COM. @ 10800 IN MX 3 ALT1.ASPMX.L.GOOGLE.COM. @ 10800 IN MX 1 ASPMX.L.GOOGLE.COM. google8a70835987f31e34 10800 IN CNAME google.com. I made that one up and included right in the middle to show how confused I am. What I'd like to know is the exact syntax and where/how I should put this TXT record.

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• Nagios send mail when server is down

  - by tzulberti

  I am using nagios 3.06 to monitor the servers. When a service is critical, it sends a mail, but when a server is down no mail is sent. Even if all the services go to critical state, no mail is sent. I have the following configuration: define command {     command_name notify-host-by-email     command_line python /etc/nagios3/send_mail.py "[Nagios] $HOSTNAME$" "******** Nagios ****\n\n Host: $HOSTNAME$\n Description: the server is down" } define command{     command_name notify-service-by-email     command_line python /etc/nagios3/send_mail.py "[Nagios] $HOSTNAME$: $SERVICEDESC$ ($NOTIFICATIONTYPE$)" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\nDate/Time: $LONGDATETIME$\nAdditional Info:$SERVICEOUTPUT$" } The python script is a script to sent a mail. It works if I execute it from the command line, but it doesn't sents an email from nagios. What I am doing wrong? UPDATE: The contact data is: define contact{     contact_name root     alias Root     service_notification_period 24x7     host_notification_period 24x7     service_notification_options w,u,c,r     host_notification_options d,r     service_notification_commands notify-service-by-email     host_notification_commands notify-host-by-email     email [email protected] } define contactgroup{     contactgroup_name admins     alias Nagios Administrators     members root }

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

  - by Luke

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

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• How should a small company administer their web server?

  - by John Isaacks

  We currently have our website hosted by a small company that is actually a reseller for Rackspace. They act as our server administrators. They configured the servers, handle the backups, if there is a problem, we call them and they fix it. We are growing and want to move away from our shared server to either a cloud or dedicated server. I am thinking cloud myself but I am open to either. The current company doesn't seem to want to offer us anything more than a shared hosting plan. I looked into cloud solutions at vps.net, with them I would have to be the server administrator myself. I am the website programmer but administering the server is outside my comfort zone. vps.net does have a $99/month plan for Pro-Active Managed Support but I am not sure if this is the equivalent on a server admin that is there when you need them. We could hire someone in house, but I think that would be overkill for our needs. I am not exactly sure what we need, I do know we need as close to 100% uptime as we possible can. and we need the ability to add/remove/change the server configuration/software/etc. when needed (though changes shouldn't be very often once everything is setup right). Can someone point me in the right direction? What do other companies do?

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