I need to configure Postfix to send 451 4.7.0 Temporary problem, please try again later for a specific domain.
I have tried to google for returning custom error codes for a domain with no luck so far.
I have OpenFiler storage server.
Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21.
I have already successfully installed MegaCli to OpenFiler but I'm stuck in figuring out the correct command line for creating a raid 10 array.
The documentations says that the syntax for creating a raid 10 is:
MegaCli -CfgSpanAdd -r10 -Array0[E:S,E:S] -Array1[E:S,E:S] -aN
My enclosure ID is 25, so:
[root@linux-h5ut ~]# MegaCli -CfgSpanAdd -r10 -Array0[E25:S02,E25:S21] -Array1[E25:S02,E25:S21] WB Cached NoCachedBadBBU -a0
Invalid input at or near token E
I have googled high and low but there doesn't seem to be any example doing raid10 with megaraid (only the syntax).
Can anyone explain what is wrong?
A customer has a rack with some 1U servers and Dell™ PowerConnect™ 2716 switch at ISP's server room. One port is uplink to the ISP. Some servers run ESX5 while one 1U server is a plain Windows 2008 R2 box with 2 nics.
The switch allows me to use web based interface but there are no mrtg style graphs available to monitor bandwidth (ab)usage.
There have been 2 occasions where the whole 100Mbps that we have given by the ISP, is fully under load and we have only our gut feeling to determine if the slowness is caused by the server or the network. So far we have been solving problems with this gut feeling but before we rush to the shop buying expensive Cisco gear, I'd like to know if I could take advantage of the switch's port mirror feature and mirror the uplink port to a port in switch from which I could pull a cable to the secondary nic on the physical plain Windows box and do some network traffic analysis on that plain box (by using promiscuous mode and some software to make statistics).
What would be the software that I could use on the box in order to easily see: 1) How big the total network load is on the uplink port. 2) How it is distributed among IPs/MACs
The users of a Windows Server 2003 terminal server should be able to use their national identity card (a smart card) inside the terminal session. This requires the Remote Desktop Connection's [x] Smart Cards checkbox to be checked.
Unfortunately (for us), when they have their card in the reader and connect using Remote Desktop and that checkbox is checked (so that they can use the card inside the terminal session), they are "greeted" with PIN prompt instead of username and password prompt.
They can click Cancel or press Esc every time and log in with username and password but is it possible to get rid of that PIN prompt without losing smart card support inside the terminal session (so that they can still authenticate themselves in a browser inside the terminal session)?
Problem
Network speed between a VM and another machine which is not residing on the same host, is 11MB/s at most.
Topology
Facts
- ESXi5 version is 5.0.0.504890
- VM has the latest Vmware Tools installed
- VM is using E1000 network driver
- Physical box has Win Srv 2008 R2 as the OS
- CrystalDiskMark says the drive on physical box can read/write 100MB/s
- vCenter is another vm on esx
- both vm and physical box are showing 1Gbps link speed
- Configuration > Networking shows vmnic0 as 1000 Full
- NTttcp is a client/server tool from Microsoft for measuring pure network throughput
Here's what I've done so far:
Test1:
- VM is running Filezilla FTP Server (default settings, one user account made)
- Physical box is running Filezilla FTP Client (default settings)
- Physical box is uploading a big file to FTP server
- Transfer speed (as observed by Windows Task Manager on both machines): ~11MB/s (bad)
- Physical box is downloading that file from FTP server
- Transfer speed (as observed by Windows Task Manager on both machines): still ~11MB/s (bad)
Could it be disk performance issue?
Test2:
- Physical box is running
ntttcpr.exe -a 6 -m 6,0,VM_IP_ADDRESS - VM is running
ntttcps.exe -a 6 -m 6,0,PHY_BOX_IP_ADDRESS - Transfer speed (as observed by Windows Task Manager on both machines): ~11MB/s (bad)
Could it be switch performance issue?
Test3:
- physical box is running vSphere Client
- I open Summary > Storage > datastore > Browse Datastore... from physical box and upload a file to datastore
- Transfer speed (as observed by Windows Task Manager on physical box): ~26-36MB/s (good)
Could it be a vm specific issue?
Test4:
- Installed ntttcp to another vm on the same esx server
- Measured network performance between vms on the same esx server with NTttcp
- Transfer speed (as observed by Windows Task Manager on physical box): ~90-120MB/s (excellent :)
Test5:
I have another esx server on the same site, connecting to the same datastore and same switch. Those two ESX servers have both 2 NICs. One NIC goes to switch while the other goes directly to the other ESX server.
- vMotioned one of the testing vms off to the other ESX host
- Measured network performance between vms on different esx servers with NTttcp
- Transfer speed (as observed by Windows Task Manager on physical box): ~11MB/s (bad)
While I'm aware of these:
- ESXi 4.1 slow file transfer
- ESXi 5 network performance is slow
- Debian Etch and ESXi slow network speeds
- VMWare ESXi slow file copy to guest
they did not help (or I must have been missed something)
We recently needed to add more RAM to our vCenter Server (Dell PowerEdge 860 server). We checked from the Kingston memory search what kind of memory the server accepted.
Then we found a listing of 4x 2GB DDR2-667 PC2-5300 ECC Registered Memory HP ProLiant DL180 G5 240-PIN on eBay. This looked like it would work. But when we received the sticks and sticked the sticks in, the server just beeped.
Here's how the sticks look like:
Can someone explain why these stick don't work in PowerEdge 860? I.e. bring out the reason what exactly makes them incompatible with this server? Is it because these sticks are not unbuffered as Kingston told they should be? Or are they? How to tell?
We're trying to access Foxpro file-based database files via MSSQL Server's linked server feature, using Foxpro ODBC driver.
For this, we've
- installed the latest Foxpro ODBC Driver from Microsoft,
- made a System DSN which is using this driver
- chose the "Visual FoxPro database (.DBC)" option under Database type, instead of "Free table directory"
- specified the path to our dbc file (on local machine)
- installed MSSQL Server 2008 R2 Express
- installed MSSQL Server Management Studio 2008
- tried to create a new linked server by using a GUI wizard like this:
But the last step never completes (Executing is displayed forever). When Management Studio is forcibly closed and restarted the new linked server is there but only contains Catalogues subitem. If we try to expand it, Management Studio goes into loop yet again.
How to add TDS (knowledge about MS SQL Server packets' structure) support for tshark?
Currently, the situation is this:
root@DEV:/# tshark -d . 2>&1| grep -i tds root@DEV:/#
I.e: tshark does not recognize tds protocol.
I am building a small setup of ESX5 servers. There will be different apps running for different companies on them. Each company has a VM that has one Internet facing vNIC and one vNIC facing to this company's private virtual network (backend). The backend networks are for separate web server and database VMs.
The question is: would it be performance and/or security wise better to create a separate virtual switch for each company or just use VLAN tags? I mean if all the private networks are load-wise fully utilized, would it make a difference if they used separate virtual switches?
When I create a new Outlook profile and re-add POP account, Outlook starts to redownload old messages from POP server if Outlook had previously configured with "Leave messages on server" setting. This occurs even when the very same PST file is used as message store.
I would like to know, where does Outlook keep the information associated with "Leave messages on the server" setting. And if there is a way to "cheat" Outlook into thinking that it has already downloaded these mails (when I use the same PST from it's older install instance).
Is it possible to use .htaccess file to rewrite this:
http://customer1.com/app/assets/css
into this:
http://customer1.com/app/customers/customer1/assets/css?
If it is then how?
EDIT: The goal is to avoid any updates to .htaccess when a new customer is added EDIT2:
I see that my question has been too vague. I have a CMS that is being used for lots of different customers (www.foo.com, www.bar.com, www.somerandomname.com). Each customer has it's unique files (design, uploads) in a directory /data/www/cms/customers/XXXXXX/ where XXXXXX is the name of the customer. Apache config file has default DocumentRoot set on /data/www/cms/.
What I'm trying to do is to have the URL http://www.foo.com/app/assets/css/bg.png to return a file from the given customers data directory, i.e. /data/www/cms/app/customers/foo.com/assets/css/bg.png.
I need to create a new mailing list in Exchange 2010 which would consist of about 50 external email addresses. I have the list of (external) email addresses in plain text format.
I have previously solved this task by manually creating an external contact for each email address and then adding those external contacts to a distribution group.
What would be the most efficient way to solve this task with Exchange 2010? Does EMS help here?
We recently migrated from Exchange 2003 to 2010. Half of our Outlook users are using Outlook from terminal server which is in the same domain as Exchange. The other half of Outlooks are installed on laptops which are not on domain. They usually use OpenVPN to connect to Exchange (and also to other services) but occasionally, when they are located somewhere where there are most outgoing ports blocked (hotels mostly), they use OutlookAnywhere.
We have 2 certificates: one for 'ourexchangeserver', self-signed, and other for '*.ourexternaldomain.tld', signed by StartCom.
By opening EMC > Server Configuration > Exchange Certificates, we can assign IMAP, POP, SMTP and IIS services to a given certificate.
The problem is that RPC also seems to use this same certificate. So when we assign the wildcard certificate to IIS, we can access OWA externally without any security alerts but Outlooks display a security alert that host name is invalid (does not match the issued to field on the presented certificate).
When we assign the self-signed certificate to IIS, it's the other way around: Outlooks don't complain but browser displays the same security alert when visiting OWA.
My certificate provider (StartCom) does not allow me to generate a certificate issued to a host with missing or nonexistent domain part.
Would it be possible to configure Exchange 2010 with these 2 certificates so that OWA would present the public certificate and RPC traffic would be covered with the self signed certificate?
I have noticed that some Linux based virtual machines become gradually slower until I reboot them. At first I suspected hacking and resource abusing but after several vm rebuilds from the scratch and being extra ultra careful security wise, I have ruled the hacking out. Now I'm suspecting that ESX hosts do not have enough RAM and are swapping it for the less busy VMs.
How could I verify whether this is the case or not?
Specs:
ESX#1: ESX 3.5 8x3GHz, 32GB RAM. 7 vms
ESX#2: ESX 3.5 8x3GHz, 32GB RAM. 25 vms
70GB configured guest RAM in total over all the vms.
ESX1 has occasionally an alert that memory is getting low but it's only 24GB of 32GB.
I have 2 physical servers:
- Two way Intel E5504 @ 2GHz, 24GB RAM, 12x32GB Intel X25-E SSDs in RAID10.
- Intel Core2 6400 @ 2.12GHz, 3GB RAM, simple 80GB SATA drive.
Both machines run Windows Server 2008 R2 now and have 10Gbit Supermicro AOC-STGN-i2S (actually they are Intel 82599 bearing Supermicro logo) in PCIe x4 slots- with a SFP+ direct attached twin axial cable between them.
The second server is for testing only.
First I installed ESXi on the 2nd and used the 1st as a datastore.
I noticed that according to CrystalDiskMark, a VM on ESX only got 325 MB/s seq transfer rate (tried with both NFS and ISCSI).
I ran the same test on the first server locally and got ~1000 MB/s. I wondered if the network link really kills 2/3 of speed, so I replaced 2nd's hard drive and installed Windows Server 2008 R2 and tried Jperf and NTTtcp. Jperf showed 400 MB/s and NTttcp showed 4300-4600Mbit/s. Windows Task Manager showed some 600 000 000 bytes per interval which translates to 4.47 Gigabits.
I verified that both ends had full duplex and tried toggling jumbo frames on and off both ends but the difference was only 580 000 000 vs 600 000 000 bytes per interval.
Why the throughput I'm seeing is only about half the theoretical maximum of 10 gigabits?
ADDENDUM
NTTtcp command lines:
ntttcpr -m 6,0,192.168.137.1 -a 6 (receiver)
ntttcps -m 6,0,192.168.137.1 -a 6 (sender)
I have an Openbravo POS workstation with a customer display pole. The pole is VFD-860. When I click on the products on the Sales page of Openbravo, the display responds but displays garbage:
When I turn the pole off and then on. I get this:
So it is not exactly broken. Com port is correct because otherwise it would not respond at all.
There is a configuration utility with the pole but it is either the wrong version (it says it's for VFD660_460 but the documentation at http://bit.ly/iUbmpB says that VFD860 uses software which installs itself to Start menu > Programs > VFD-660_460) or there is some other problem because whatever choice I make there, after clicking Accept I always get Device Time Out error (even though I see another garbage character appearing onto the display the second I click Accept).
How to fix that?
Is is possible to set up ESXi or more expensive ESX server as a storage target (FCoE, ISCSI or NFS, in that order) for other ESX servers? If so, how?
What storage connection method should one prefer to use for connecting ESX servers to a shared storage server with 10GbE links?
Speficically, I have 2 ESX servers for VMware ESX and one server for shared storage.
The storage server is 2 x Xeon E5504 2GHz, 24GB RAM, 12xSSD + 12xSATA and battery backed RAID. The ESX servers are much the same but with 2 small SAS drives.
All servers have 10GbE adapters connected like so:
I have a licence for ESX 3.5 but for testing purposes I am currently running ESXi 4.1. The storage server runs Windows 7 for testing purposes.
I am aware about at least 3 methods:
1. ISCSI
2. NFS
3. FCoE
Which one would you recommend to choose and why?
Can I use the same paid SSL certificate for OpenVPN and Apache?
UPDATE: The purpose is to get a Estonian National ID card support to both. So that one, using this smart card, may authenticate himself with his personal PIN code for Apache for accessing restricted web pages and also authenticate himself to OpenVPN server using the same PIN. The issuer of the certificate is okay with this.